- Type of paper
: Book
Title: General zoology
- Authors:
- ERBEN, RADOVAN (11296)
- Editors
- SAMBOLEK-HRBIÆ, EMILIJA
Publisher: Školska knjiga
ISBN: 9530-31120-6
Year: 1994
Number of pages: 396
Number of references: 81
Language: hrvatski
- Type of paper
: Paper in journal
Title: The freshwater fishes of Istrian Peninsula
- Authors:
- LEINER, SREÆKO (79862)
- PIŠL, ZORAN (82896)
Journal: PERIODICUM BIOLOGORUM
Number: 4
ISSN: 0031-5632
Volume: 96
Year: 1994
Pages: from 431 to 434
Language: engleski
Keywords: Istria, freshwater fishes, Slovenia, Croatia, IUCN categories .DBFDBFTEMPPATHðjh ¼Vh U.臢®BæT˜ FðCh DBFNTXDBFNTX GETFUNCTABLEWEPÆP ØdP ÒØqP ØDBF2/àÂ-à.àH.àT1à0à"4à6-àÀ,àôHàŽIàŠ+àˆIààIà´Iàl3àÎ4àÂ9àd:à<<àZMàL=à’GàSrednja brojèana vrijednost gustoæe potoène (Salmo truttam. fario Linneaus, 1758) i dužièaste pastrve (Oncorhynchus mykiss Walbaum, 1972) u 15 vodoka (nadmorska visina izmeðu 1.661 i 2.560 m) države New Mexico iznosila je 0,090 riba /m2, s prosjeènom zastupljenošæu potoène pastrve od 69%, odnosno 72% ukupne biomase. Variranje ukupne gustoæe u god. 1988. i 1989. procijenjena je izmeðu 0,023 i 0,121 riba/m2 na istraživanim postajama otvorenima za sportski ribolov. Znatno je veæa gustoæa (0,142-0,409) riba/m2) zabilježena na postajama na kojima je ribolov bio zabranjen. Na sedam izabranih vodotoka, èija su staništa zauzimala obje vrste, gustoæa je potoène pastrve bila veæa od gustoæe dužièaste, uz izuzetak na dvjema postajama zatvorenima za športski ribolov. .DBFDBFTEMPPATHðjh ¼Vh U.臢®BæT˜ FðCh DBFNTXDBFNTX GETFUNCTABLEWEPÆP ØdP ÒØqP ØDBF2/àÂ-à.àH.àT1à0Mean stream numerical densitz of the brown trout (Salmo trutta m. fario Linnaeus, 1758) and the rainbow trout (Oncorhynchus mykiss Walbaum, 1792) was 0.090 fish/m2 of wich brown trout averaged 69% (72% in total biomass) in 15 high-elevation New Mexico streams (1,661-2,560 m above sea level). Total trout density varied from 0.008/m2 to 0.348/m2 in 1988 and 1989. Mean trout density ranged between 0.023-0.121 fish/m2 at sites open to public fishing. Considerably higher densities (0.142-0.409 fish/m2) were observed at sites closed for fishing. In the seven selected streams shared by both species, brown trout density exceeded rainbow trout density at the two sites closed to fishing. Brown trout were stocked only as fingerlings (average 7,000 fish/stream/year)while rainbow trout were stockedonly in harvestable sizes (11,000 fish/stream/year). Reported total trout yield rates exceeded the total number of fish estimated to be in the stream by 1.01 to 11.63 in most small streams open to fishing. The proportional stock density (PSD) ranged between 0 and 50 percent. Streams with low to moderate intensitiesof fishing had the highest PSD. .DBFDBFTEMPPATHðjh ¼Vh U.臢®BæT˜ FðCh DBFNTXDBFNTX GETFUNCTABLEWEPÆP ØdP ÒØqP ØDBF2/àÂ-à.àH.àT1à0à"4à6-àÀ,àôHàŽIàŠ+àˆIààIàSalmo trutta m. fario, Onchorhynchus mykiss, gustoæa, biomasa, vodotokovi, New Mexico, gospodarenje .DBFDBFTEMPPATHðjh ¼Vh U.臢®BæT˜ FðCh DBFNTXDBFNTX GETFUNCTABLEWEPÆP ØdP ÒØqP ØDBF2/àÂ-à.àH.àT1à0à"4à6-àÀ,àôHàŽIàŠ+àˆIààIà´Iàl3àÎ4àSalmo trutta m. fario, Onchorhynchus mykiss, density, biomass, streams, New Mexico, management .DBFDBFTEMPPATHðjh ¼Vh U.臢®BæT˜ FðCh DBFNTXDBFNTX GETFUNCTABLEWEPÆP ØdP ÒØqP ØDBF2/àÂ-à.àH.àT1à0à"4à6-àÀ,àôHàŽIàŠ+àˆIààIà´Iàl3àÎ4àÂ9àTijekom godina 1988. i 1989. uzorkovanje riba provedeno je na 32 reprezentativne postaje smještene 15 visokoplaninskih vodotokova (nadmorska visina 1.661 do 2.560 m). Pastrve su lovljene uzastopnim izlovima elektroagregatom unutar mrežama blokiranih segmenata u dužini od 65 do 160 m. Maksimalno procijenjena dužina pastrva (Lmax) bila je u negativnom odnosu prema ulovu (r2=0,351; p=0,055). Marginalna pozitivna veza dokazana je izmeðu trenutaène stope smrtnosti i sportskog ribolova (r2=0,294). Indeks produkcije procijenjen je izmeðu 1,38 i 31,02 g/m2/godinu. Promjene u produkciji u najveæoj mjeri ovise o biomasi pastrva (r2=0,910). .DBFDBFTEMPPATHðjh ¼Vh U.臢®BæT˜ FðCh DBFNTXDBFNTX GETFUNCTABLEWEPÆP ØdP ÒØqP ØDBF2/àÂ-à.àH.àT1à0à"4à6-àÀ,àôHàŽIàŠ+àˆIààIà´IàThirty-two representative trout sites in 15 high elevation New Mexico streams (1.661-2.560 m above sea level) were sampled in 1988. and 1989. Fish was captured by consecutive removal via electrofishing in net-blocked segments from 65 to 160 long. Maximum estimated trout length (Lmax) was related inversely to yield (r2=0.351; p=0.055). Instantenous rate of mortality was also marginally related to yield (r2=0.294): The production index ranged from 1,38 to 32,02 g/m2/year. Variation in production was highly correlated to trout biomass (r2=0.910). Trout growth and production were best defined by the relationships where: cover, stream width, water temperature, yield by anglers, Lmax and nitrate-nitrogen concentration were included. .DBFDBFTEMPPATHðjh ¼Vh U.臢®BæT˜ FðCh DBFNTXDBFNTX GETFUNCTABLEWEPÆP ØdP ÒØqP ØDBF2/àÂ-à.àH.àT1à0à"4àSalmo trutta m. fario, Oncorhynchus mykiss, vodotokovi, prirast, produkcija, mortalitet, New Mexico, gospodarenje .DBFDBFTEMPPATHðjh ¼Vh U.臢®BæT˜ FðCh DBFNTXDBFNTX GETFUNCTABLEWEPÆP ØdP ÒØqP ØDBF2/àÂ-à.àH.àT1à0à"4à6-àÀ,àôHàŽIàŠ+àˆIààIà´Iàl3àSalmo trutta m. fario, Oncorhynchus mykiss, streams, growth, production, mortality, New Mexico, management .DBFDBFTEMPPATHðjh ¼Vh U.臢®BæT˜ GðCh DBFNTXDBFNTX GETFUNCTABLEWEPÆP ØdP ÒØqP ØDBF2/àÂ-à.àH.àT1à0à"4à6-àÀ,àôHàŽIàŠ+àˆIààIà´Iàl3àThe accuracy of two trout biomass (standing stock) prediction models, developed for Wyoming streams by Binns & Eiserman (1979), was evaluated for New Mexico streams inhabited by brown trout, Salmo trutta L. and rainbow trout, Onchorhynchus mykiss Walbaum. Thirty-two representative sites in 15 different streams were sampled under summer low-flow conditions in 1988 and 1989. The 11 physical, chemical, and biological variables used in original models were used as independent variables for simple and multiple regression analysis designed to predict total trout biomass. Model I of Binns and Eiserman proved to be of limited utility; it explained 53% of the variation in total trout biomass at each of the New Mexico sites (kg ha-1=+0.830/Model I/). Only 9.5% of the biomass variations was explained by Model II. Statistical analysis showed that trout biomass was significantly correlated with nitrate-nitrogen concentration and macroinvertebrate diversity in Model I. Because both variates are time consuming to estimate, Model I may not be any more cost-effective than sampling trout directly. The low predictive power of Model II probably indicates that it is limited to the geographical area of the field measurement origin. .DBFDBFTEMPPATHðjh ¼Vh U.臢®BæT˜ GðCh DBFNTXDBFNTX GETFUNCTABLEWEPÆP ØdP ÒØqP ØDBF2/àÂ-à.àH.àT1à0à"4àmodeli staništa, biomasa pastrva, vodotoci, New Mexico, gospodarenje .DBFDBFTEMPPATHðjh ¼Vh U.臢®BæT˜ GðCh DBFNTXDBFNTX GETFUNCTABLEWEPÆP ØdP ÒØqP ØDBF2/àÂ-à.àH.àT1à0à"4à6-àÀ,àôHàŽIàŠ+àˆIààIà´Iàl3àÎ4àÂ9àd:à<<àZMàL=à’Gàhabitat models, trout biomass, streams, New Mexico, management .DBFDBFTEMPPATHðjh ¼Vh U.臢®BæT˜ LðCh DBFNTXDBFNTX GETFUNCTABLEWEPÆP ØdP ÒØqP ØDBF2/àÂ-à.àH.àT1à0à"4à6-àÀ,àôHàŽIàŠ+àˆIààIà´Iàl3àÎ4àÂ9àd:à<<àZMàL=à’GàThis study evaluated the standing crop biomass of freshwatter snails and its spatial distribution according to four substrate types (boulders, cobbles, gravel covered with periphyton and gravel covered with macrophytes). The study site, in the Kupa River of the NW Dinarid area of Croatia, is in a karstic region. Depending on habitat, the gastropod wet biomass varied from 6.4% to 43.8% of the total macroinvertebrate biomass per unit area. The gastropods are the dominant component of the biomass on boulder substrates in the upper region of the river, and on gravel substrates covered with macrophytes, in the lower course. It was found that the gastropods are also the dominant component of the functional group of scrapers. The average annual gastropod biomass constitutes more than 80% of scrapers at sampling sites in the upper and lower regions of the river. .DBFDBFTEMPPATHðjh ¼Vh U.臢®BæT˜ MðCh DBFThe paper deals with results of studies on effects of some ecological and technological factors on the production results of carp fry rearing in Croatian ponds. The dynamics of the development of natural food and hydrochemical parameters was studied in four ponds with the area ranging from 4.5 to 10.0 hectars and with density of 200,000 Co individuals per hectar. There was a correlation between the availability of zoobenthos and the weight gain of fry. The harvesting carried out after the overwintering resulted in the catch of 23,000 to 25,000 C1individuals per hectar. Production ranged from 1,074 to 1,657 kg per hectar, body mass of C1 was 25 to 65 g and the survival ratio Co-1 ranged from 12 to 29%. A higher coefficient of food conversion (3.0 to 3.8) was influenced by a low degree of saturation of water with oxygen (20-30%) and a lower quality of food. .DBFDBFTEMPPATHðjh ¼Vh U.臢®BæT˜ MðCh The paper deals with results of studies on effects of some ecological and technological factors on the production results of carp fry rearing in Croatian ponds. The dynamics of the development of natural food and hydrochemical parameters was studied in four ponds with the area ranging from 4.5 to 10.0 hectars and with density of 200,000 Co individuals per hectar. There was a correlation between the availability of zoobenthos and the weight gain of fry. The harvesting carried out after the overwintering resulted in the catch of 23,000 to 25,000 C1individuals per hectar. Production ranged from 1,074 to 1,657 kg per hectar, body mass of C1 was 25 to 65 g and the survival ratio Co-1 ranged from 12 to 29%. A higher coefficient of food conversion (3.0 to 3.8) was influenced by a low degree of saturation of water with oxygen (20-30%) and a lower quality of food.
- Type of paper
: Paper in journal
Title: Biomass and desity of brown and rainbow trout in New
Mexico streams
- Authors:
- LEINER, SREÆKO (79862)
Journal: Periodicum biologorum
Number: 1
ISSN: 1330-061X
Volume: 53
Year: 1995
Pages: from 3 to 24
Number of references: 11
Language: engleski
Summary: 0Mean stream numerical densitz of the brown trout (Salmo
trutta m. fario Linnaeus, 1758) and the rainbow trout (Oncorhynchus mykiss
Walbaum, 1792) was 0.090 fish/m2 of wich brown trout averaged 69% (72% in
total biomass) in 15 high-elevation New Mexico streams (1,661-2,560 m above
sea level). Total trout density varied from 0.008/m2 to 0.348/m2 in 1988
and 1989. Mean trout density ranged between 0.023-0.121 fish/m2 at sites
open to public fishing. Considerably higher densities (0.142-0.409 fish/m2)
were observed at sites closed for fishing. In the seven selected streams
shared by both species, brown trout density exceeded rainbow trout density
at the two sites closed to fishing. Brown trout were stocked only as
fingerlings (average 7,000 fish/stream/year)while rainbow trout were
stockedonly in harvestable sizes (11,000 fish/stream/year). Reported total
trout yield rates exceeded the total number of fish estimated to be in the
stream by 1.01 to 11.63 in most small streams open to fishing. The
proportional stock density (PSD) ranged between 0 and 50 percent. Streams
with low to moderate intensitiesof fishing had the highest PSD.
Ø
gustoæa, biomasa, vodotokovi, New Mexico, gospodarenje
Ø
Salmo trutta m. fario, Onchorhynchus mykiss, density, biomass, streams, New
Mexico, management
Ø
Â9à
reprezentativne postaje smještene 15 visokoplaninskih vodotokova (nadmorska
visina 1.661 do 2.560 m). Pastrve su lovljene uzastopnim izlovima
elektroagregatom unutar mrežama blokiranih segmenata u dužini od 65 do 160
m. Maksimalno procijenjena dužina pastrva (Lmax) bila je u negativnom
odnosu prema ulovu (r2=0,351; p=0,055). Marginalna pozitivna veza dokazana
je izmeðu trenutaène stope smrtnosti i sportskog ribolova (r2=0,294).
Indeks produkcije procijenjen je izmeðu 1,38 i 31,02 g/m2/godinu. Promjene
u produkciji u najveæoj mjeri ovise o biomasi pastrva (r2=0,910).
Ø
high elevation New Mexico streams (1.661-2.560 m above sea level) were
sampled in 1988. and 1989. Fish was captured by consecutive removal via
electrofishing in net-blocked segments from 65 to 160 long. Maximum
estimated trout length (Lmax) was related inversely to yield (r2=0.351;
p=0.055). Instantenous rate of mortality was also marginally related to
yield (r2=0.294): The production index ranged from 1,38 to 32,02 g/m2/year.
Variation in production was highly correlated to trout biomass (r2=0.910).
Trout growth and production were best defined by the relationships where:
cover, stream width, water temperature, yield by anglers, Lmax and
nitrate-nitrogen concentration were included.
Ø
produkcija, mortalitet, New Mexico, gospodarenje
Ø
m. fario, Oncorhynchus mykiss, streams, growth, production, mortality, New
Mexico, management
Ø
accuracy of two trout biomass (standing stock) prediction models, developed
for Wyoming streams by Binns & Eiserman (1979), was evaluated for New
Mexico streams inhabited by brown trout, Salmo trutta L. and rainbow trout,
Onchorhynchus mykiss Walbaum. Thirty-two representative sites in 15
different streams were sampled under summer low-flow conditions in 1988 and
1989. The 11 physical, chemical, and biological variables used in original
models were used as independent variables for simple and multiple
regression analysis designed to predict total trout biomass. Model I of
Binns and Eiserman proved to be of limited utility; it explained 53% of the
variation in total trout biomass at each of the New Mexico sites (kg
ha-1=+0.830/Model I/). Only 9.5% of the biomass variations was explained by
Model II. Statistical analysis showed that trout biomass was significantly
correlated with nitrate-nitrogen concentration and macroinvertebrate
diversity in Model I. Because both variates are time consuming to estimate,
Model I may not be any more cost-effective than sampling trout directly.
The low predictive power of Model II probably indicates that it is limited
to the geographical area of the field measurement origin.
Ø
gospodarenje
Ø
Â9à
New Mexico, management
Ø
Â9à
crop biomass of freshwatter snails and its spatial distribution according
to four substrate types (boulders, cobbles, gravel covered with periphyton
and gravel covered with macrophytes). The study site, in the Kupa River of
the NW Dinarid area of Croatia, is in a karstic region. Depending on
habitat, the gastropod wet biomass varied from 6.4% to 43.8% of the total
macroinvertebrate biomass per unit area. The gastropods are the dominant
component of the biomass on boulder substrates in the upper region of the
river, and on gravel substrates covered with macrophytes, in the lower
course. It was found that the gastropods are also the dominant component of
the functional group of scrapers. The average annual gastropod biomass
constitutes more than 80% of scrapers at sampling sites in the upper and
lower regions of the river.
ecological and technological factors on the production results of carp fry
rearing in Croatian ponds. The dynamics of the development of natural food
and hydrochemical parameters was studied in four ponds with the area
ranging from 4.5 to 10.0 hectars and with density of 200,000 Co individuals
per hectar. There was a correlation between the availability of zoobenthos
and the weight gain of fry. The harvesting carried out after the
overwintering resulted in the catch of 23,000 to 25,000 C1individuals per
hectar. Production ranged from 1,074 to 1,657 kg per hectar, body mass of
C1 was 25 to 65 g and the survival ratio Co-1 ranged from 12 to 29%. A
higher coefficient of food conversion (3.0 to 3.8) was influenced by a low
degree of saturation of water with oxygen (20-30%) and a lower quality of
food.
ecological and technological factors on the production results of carp fry
rearing in Croatian ponds. The dynamics of the development of natural food
and hydrochemical parameters was studied in four ponds with the area
ranging from 4.5 to 10.0 hectars and with density of 200,000 Co individuals
per hectar. There was a correlation between the availability of zoobenthos
and the weight gain of fry. The harvesting carried out after the
overwintering resulted in the catch of 23,000 to 25,000 C1individuals per
hectar. Production ranged from 1,074 to 1,657 kg per hectar, body mass of
C1 was 25 to 65 g and the survival ratio Co-1 ranged from 12 to 29%. A
higher coefficient of food conversion (3.0 to 3.8) was influenced by a low
degree of saturation of water with oxygen (20-30%) and a lower quality of
food.
Keywords: àSalmo trutta m. fario, Onchorhynchus mykiss, density, biomass, streams, New Mexico, management .DBFDBFTEMPPATHðjh ¼Vh U.臢®BæT˜ FðCh DBFNTXDBFNTX GETFUNCTABLEWEPÆP ØdP ÒØqP ØDBF2/àÂ-à.àH.àT1à0à"4à6-àÀ,àôHàŽIàŠ+àˆIààIà´Iàl3àÎ4àÂ9àTijekom godina 1988. i 1989. uzorkovanje riba provedeno je na 32 reprezentativne postaje smještene 15 visokoplaninskih vodotokova (nadmorska visina 1.661 do 2.560 m). Pastrve su lovljene uzastopnim izlovima elektroagregatom unutar mrežama blokiranih segmenata u dužini od 65 do 160 m. Maksimalno procijenjena dužina pastrva (Lmax) bila je u negativnom odnosu prema ulovu (r2=0,351; p=0,055). Marginalna pozitivna veza dokazana je izmeðu trenutaène stope smrtnosti i sportskog ribolova (r2=0,294). Indeks produkcije procijenjen je izmeðu 1,38 i 31,02 g/m2/godinu. Promjene u produkciji u najveæoj mjeri ovise o biomasi pastrva (r2=0,910). .DBFDBFTEMPPATHðjh ¼Vh U.臢®BæT˜ FðCh DBFNTXDBFNTX GETFUNCTABLEWEPÆP ØdP ÒØqP ØDBF2/àÂ-à.àH.àT1à0à"4à6-àÀ,àôHàŽIàŠ+àˆIààIà´IàThirty-two representative trout sites in 15 high elevation New Mexico streams (1.661-2.560 m above sea level) were sampled in 1988. and 1989. Fish was captured by consecutive removal via electrofishing in net-blocked segments from 65 to 160 long. Maximum estimated trout length (Lmax) was related inversely to yield (r2=0.351; p=0.055). Instantenous rate of mortality was also marginally related to yield (r2=0.294): The production index ranged from 1,38 to 32,02 g/m2/year. Variation in production was highly correlated to trout biomass (r2=0.910). Trout growth and production were best defined by the relationships where: cover, stream width, water temperature, yield by anglers, Lmax and nitrate-nitrogen concentration were included. .DBFDBFTEMPPATHðjh ¼Vh U.臢®BæT˜ FðCh DBFNTXDBFNTX GETFUNCTABLEWEPÆP ØdP ÒØqP ØDBF2/àÂ-à.àH.àT1à0à"4àSalmo trutta m. fario, Oncorhynchus mykiss, vodotokovi, prirast, produkcija, mortalitet, New Mexico, gospodarenje .DBFDBFTEMPPATHðjh ¼Vh U.臢®BæT˜ FðCh DBFNTXDBFNTX GETFUNCTABLEWEPÆP ØdP ÒØqP ØDBF2/àÂ-à.àH.àT1à0à"4à6-àÀ,àôHàŽIàŠ+àˆIààIà´Iàl3àSalmo trutta m. fario, Oncorhynchus mykiss, streams, growth, production, mortality, New Mexico, management .DBFDBFTEMPPATHðjh ¼Vh U.臢®BæT˜ GðCh DBFNTXDBFNTX GETFUNCTABLEWEPÆP ØdP ÒØqP ØDBF2/àÂ-à.àH.àT1à0à"4à6-àÀ,àôHàŽIàŠ+àˆIààIà´Iàl3àThe accuracy of two trout biomass (standing stock) prediction models, developed for Wyoming streams by Binns & Eiserman (1979), was evaluated for New Mexico streams inhabited by brown trout, Salmo trutta L. and rainbow trout, Onchorhynchus mykiss Walbaum. Thirty-two representative sites in 15 different streams were sampled under summer low-flow conditions in 1988 and 1989. The 11 physical, chemical, and biological variables used in original models were used as independent variables for simple and multiple regression analysis designed to predict total trout biomass. Model I of Binns and Eiserman proved to be of limited utility; it explained 53% of the variation in total trout biomass at each of the New Mexico sites (kg ha-1=+0.830/Model I/). Only 9.5% of the biomass variations was explained by Model II. Statistical analysis showed that trout biomass was significantly correlated with nitrate-nitrogen concentration and macroinvertebrate diversity in Model I. Because both variates are time consuming to estimate, Model I may not be any more cost-effective than sampling trout directly. The low predictive power of Model II probably indicates that it is limited to the geographical area of the field measurement origin. .DBFDBFTEMPPATHðjh ¼Vh U.臢®BæT˜ GðCh DBFNTXDBFNTX GETFUNCTABLEWEPÆP ØdP ÒØqP ØDBF2/àÂ-à.àH.àT1à0à"4àmodeli staništa, biomasa pastrva, vodotoci, New Mexico, gospodarenje .DBFDBFTEMPPATHðjh ¼Vh U.臢®BæT˜ GðCh DBFNTXDBFNTX GETFUNCTABLEWEPÆP ØdP ÒØqP ØDBF2/àÂ-à.àH.àT1à0à"4à6-àÀ,àôHàŽIàŠ+àˆIààIà´Iàl3àÎ4àÂ9àd:à<<àZMàL=à’Gàhabitat models, trout biomass, streams, New Mexico, management .DBFDBFTEMPPATHðjh ¼Vh U.臢®BæT˜ LðCh DBFNTXDBFNTX GETFUNCTABLEWEPÆP ØdP ÒØqP ØDBF2/àÂ-à.àH.àT1à0à"4à6-àÀ,àôHàŽIàŠ+àˆIààIà´Iàl3àÎ4àÂ9àd:à<<àZMàL=à’GàThis study evaluated the standing crop biomass of freshwatter snails and its spatial distribution according to four substrate types (boulders, cobbles, gravel covered with periphyton and gravel covered with macrophytes). The study site, in the Kupa River of the NW Dinarid area of Croatia, is in a karstic region. Depending on habitat, the gastropod wet biomass varied from 6.4% to 43.8% of the total macroinvertebrate biomass per unit area. The gastropods are the dominant component of the biomass on boulder substrates in the upper region of the river, and on gravel substrates covered with macrophytes, in the lower course. It was found that the gastropods are also the dominant component of the functional group of scrapers. The average annual gastropod biomass constitutes more than 80% of scrapers at sampling sites in the upper and lower regions of the river. .DBFDBFTEMPPATHðjh ¼Vh U.臢®BæT˜ MðCh DBFThe paper deals with results of studies on effects of some ecological and technological factors on the production results of carp fry rearing in Croatian ponds. The dynamics of the development of natural food and hydrochemical parameters was studied in four ponds with the area ranging from 4.5 to 10.0 hectars and with density of 200,000 Co individuals per hectar. There was a correlation between the availability of zoobenthos and the weight gain of fry. The harvesting carried out after the overwintering resulted in the catch of 23,000 to 25,000 C1individuals per hectar. Production ranged from 1,074 to 1,657 kg per hectar, body mass of C1 was 25 to 65 g and the survival ratio Co-1 ranged from 12 to 29%. A higher coefficient of food conversion (3.0 to 3.8) was influenced by a low degree of saturation of water with oxygen (20-30%) and a lower quality of food. .DBFDBFTEMPPATHðjh ¼Vh U.臢®BæT˜ MðCh The paper deals with results of studies on effects of some ecological and technological factors on the production results of carp fry rearing in Croatian ponds. The dynamics of the development of natural food and hydrochemical parameters was studied in four ponds with the area ranging from 4.5 to 10.0 hectars and with density of 200,000 Co individuals per hectar. There was a correlation between the availability of zoobenthos and the weight gain of fry. The harvesting carried out after the overwintering resulted in the catch of 23,000 to 25,000 C1individuals per hectar. Production ranged from 1,074 to 1,657 kg per hectar, body mass of C1 was 25 to 65 g and the survival ratio Co-1 ranged from 12 to 29%. A higher coefficient of food conversion (3.0 to 3.8) was influenced by a low degree of saturation of water with oxygen (20-30%) and a lower quality of food.
- Type of paper
: Paper in journal
Title: Growth, mortality and production of brown and rainbow
trout in New mexico streams
- Authors:
- LEINER, SREÆKO (79862)
Journal: Periodicum biologorum
Number: 2
ISSN: 1330-061X
Volume: 53
Year: 1995
Pages: from 51 to 62
Number of references: 22
Language: engleski
Summary:
elevation New Mexico streams (1.661-2.560 m above sea level) were sampled
in 1988. and 1989. Fish was captured by consecutive removal via
electrofishing in net-blocked segments from 65 to 160 long. Maximum
estimated trout length (Lmax) was related inversely to yield (r2=0.351;
p=0.055). Instantenous rate of mortality was also marginally related to
yield (r2=0.294): The production index ranged from 1,38 to 32,02 g/m2/year.
Variation in production was highly correlated to trout biomass (r2=0.910).
Trout growth and production were best defined by the relationships where:
cover, stream width, water temperature, yield by anglers, Lmax and
nitrate-nitrogen concentration were included.
Ø
produkcija, mortalitet, New Mexico, gospodarenje
Ø
m. fario, Oncorhynchus mykiss, streams, growth, production, mortality, New
Mexico, management
Ø
accuracy of two trout biomass (standing stock) prediction models, developed
for Wyoming streams by Binns & Eiserman (1979), was evaluated for New
Mexico streams inhabited by brown trout, Salmo trutta L. and rainbow trout,
Onchorhynchus mykiss Walbaum. Thirty-two representative sites in 15
different streams were sampled under summer low-flow conditions in 1988 and
1989. The 11 physical, chemical, and biological variables used in original
models were used as independent variables for simple and multiple
regression analysis designed to predict total trout biomass. Model I of
Binns and Eiserman proved to be of limited utility; it explained 53% of the
variation in total trout biomass at each of the New Mexico sites (kg
ha-1=+0.830/Model I/). Only 9.5% of the biomass variations was explained by
Model II. Statistical analysis showed that trout biomass was significantly
correlated with nitrate-nitrogen concentration and macroinvertebrate
diversity in Model I. Because both variates are time consuming to estimate,
Model I may not be any more cost-effective than sampling trout directly.
The low predictive power of Model II probably indicates that it is limited
to the geographical area of the field measurement origin.
Ø
gospodarenje
Ø
Â9à
New Mexico, management
Ø
Â9à
crop biomass of freshwatter snails and its spatial distribution according
to four substrate types (boulders, cobbles, gravel covered with periphyton
and gravel covered with macrophytes). The study site, in the Kupa River of
the NW Dinarid area of Croatia, is in a karstic region. Depending on
habitat, the gastropod wet biomass varied from 6.4% to 43.8% of the total
macroinvertebrate biomass per unit area. The gastropods are the dominant
component of the biomass on boulder substrates in the upper region of the
river, and on gravel substrates covered with macrophytes, in the lower
course. It was found that the gastropods are also the dominant component of
the functional group of scrapers. The average annual gastropod biomass
constitutes more than 80% of scrapers at sampling sites in the upper and
lower regions of the river.
ecological and technological factors on the production results of carp fry
rearing in Croatian ponds. The dynamics of the development of natural food
and hydrochemical parameters was studied in four ponds with the area
ranging from 4.5 to 10.0 hectars and with density of 200,000 Co individuals
per hectar. There was a correlation between the availability of zoobenthos
and the weight gain of fry. The harvesting carried out after the
overwintering resulted in the catch of 23,000 to 25,000 C1individuals per
hectar. Production ranged from 1,074 to 1,657 kg per hectar, body mass of
C1 was 25 to 65 g and the survival ratio Co-1 ranged from 12 to 29%. A
higher coefficient of food conversion (3.0 to 3.8) was influenced by a low
degree of saturation of water with oxygen (20-30%) and a lower quality of
food.
ecological and technological factors on the production results of carp fry
rearing in Croatian ponds. The dynamics of the development of natural food
and hydrochemical parameters was studied in four ponds with the area
ranging from 4.5 to 10.0 hectars and with density of 200,000 Co individuals
per hectar. There was a correlation between the availability of zoobenthos
and the weight gain of fry. The harvesting carried out after the
overwintering resulted in the catch of 23,000 to 25,000 C1individuals per
hectar. Production ranged from 1,074 to 1,657 kg per hectar, body mass of
C1 was 25 to 65 g and the survival ratio Co-1 ranged from 12 to 29%. A
higher coefficient of food conversion (3.0 to 3.8) was influenced by a low
degree of saturation of water with oxygen (20-30%) and a lower quality of
food.
Keywords: Salmo trutta m. fario, Oncorhynchus mykiss, streams, growth, production, mortality, New Mexico, management .DBFDBFTEMPPATHðjh ¼Vh U.臢®BæT˜ GðCh DBFNTXDBFNTX GETFUNCTABLEWEPÆP ØdP ÒØqP ØDBF2/àÂ-à.àH.àT1à0à"4à6-àÀ,àôHàŽIàŠ+àˆIààIà´Iàl3àThe accuracy of two trout biomass (standing stock) prediction models, developed for Wyoming streams by Binns & Eiserman (1979), was evaluated for New Mexico streams inhabited by brown trout, Salmo trutta L. and rainbow trout, Onchorhynchus mykiss Walbaum. Thirty-two representative sites in 15 different streams were sampled under summer low-flow conditions in 1988 and 1989. The 11 physical, chemical, and biological variables used in original models were used as independent variables for simple and multiple regression analysis designed to predict total trout biomass. Model I of Binns and Eiserman proved to be of limited utility; it explained 53% of the variation in total trout biomass at each of the New Mexico sites (kg ha-1=+0.830/Model I/). Only 9.5% of the biomass variations was explained by Model II. Statistical analysis showed that trout biomass was significantly correlated with nitrate-nitrogen concentration and macroinvertebrate diversity in Model I. Because both variates are time consuming to estimate, Model I may not be any more cost-effective than sampling trout directly. The low predictive power of Model II probably indicates that it is limited to the geographical area of the field measurement origin. .DBFDBFTEMPPATHðjh ¼Vh U.臢®BæT˜ GðCh DBFNTXDBFNTX GETFUNCTABLEWEPÆP ØdP ÒØqP ØDBF2/àÂ-à.àH.àT1à0à"4àmodeli staništa, biomasa pastrva, vodotoci, New Mexico, gospodarenje .DBFDBFTEMPPATHðjh ¼Vh U.臢®BæT˜ GðCh DBFNTXDBFNTX GETFUNCTABLEWEPÆP ØdP ÒØqP ØDBF2/àÂ-à.àH.àT1à0à"4à6-àÀ,àôHàŽIàŠ+àˆIààIà´Iàl3àÎ4àÂ9àd:à<<àZMàL=à’Gàhabitat models, trout biomass, streams, New Mexico, management .DBFDBFTEMPPATHðjh ¼Vh U.臢®BæT˜ LðCh DBFNTXDBFNTX GETFUNCTABLEWEPÆP ØdP ÒØqP ØDBF2/àÂ-à.àH.àT1à0à"4à6-àÀ,àôHàŽIàŠ+àˆIààIà´Iàl3àÎ4àÂ9àd:à<<àZMàL=à’GàThis study evaluated the standing crop biomass of freshwatter snails and its spatial distribution according to four substrate types (boulders, cobbles, gravel covered with periphyton and gravel covered with macrophytes). The study site, in the Kupa River of the NW Dinarid area of Croatia, is in a karstic region. Depending on habitat, the gastropod wet biomass varied from 6.4% to 43.8% of the total macroinvertebrate biomass per unit area. The gastropods are the dominant component of the biomass on boulder substrates in the upper region of the river, and on gravel substrates covered with macrophytes, in the lower course. It was found that the gastropods are also the dominant component of the functional group of scrapers. The average annual gastropod biomass constitutes more than 80% of scrapers at sampling sites in the upper and lower regions of the river. .DBFDBFTEMPPATHðjh ¼Vh U.臢®BæT˜ MðCh DBFThe paper deals with results of studies on effects of some ecological and technological factors on the production results of carp fry rearing in Croatian ponds. The dynamics of the development of natural food and hydrochemical parameters was studied in four ponds with the area ranging from 4.5 to 10.0 hectars and with density of 200,000 Co individuals per hectar. There was a correlation between the availability of zoobenthos and the weight gain of fry. The harvesting carried out after the overwintering resulted in the catch of 23,000 to 25,000 C1individuals per hectar. Production ranged from 1,074 to 1,657 kg per hectar, body mass of C1 was 25 to 65 g and the survival ratio Co-1 ranged from 12 to 29%. A higher coefficient of food conversion (3.0 to 3.8) was influenced by a low degree of saturation of water with oxygen (20-30%) and a lower quality of food. .DBFDBFTEMPPATHðjh ¼Vh U.臢®BæT˜ MðCh The paper deals with results of studies on effects of some ecological and technological factors on the production results of carp fry rearing in Croatian ponds. The dynamics of the development of natural food and hydrochemical parameters was studied in four ponds with the area ranging from 4.5 to 10.0 hectars and with density of 200,000 Co individuals per hectar. There was a correlation between the availability of zoobenthos and the weight gain of fry. The harvesting carried out after the overwintering resulted in the catch of 23,000 to 25,000 C1individuals per hectar. Production ranged from 1,074 to 1,657 kg per hectar, body mass of C1 was 25 to 65 g and the survival ratio Co-1 ranged from 12 to 29%. A higher coefficient of food conversion (3.0 to 3.8) was influenced by a low degree of saturation of water with oxygen (20-30%) and a lower quality of food.
- Type of paper
: Paper in journal
Title:
- Authors:
- LEINER, SREÆKO (79862)
Journal: Lovaèki vjesnik
ISSN: 0024-6999
Volume: 4
Year: 1994
Pages: from 34 to 36
Number of references: 4
Language: hrvatski
- Type of paper
: Paper in journal
Title:
- Authors:
- LEINER, SREÆKO (79862)
- ERBEN, RADOVAN (11296)
Journal: Hrvatska vodoprivreda
Number: 27
ISSN: 1330-321X
Volume: 3
Year: 1994
Pages: from 32 to 32
Language: hrvatski
- Type of paper
: Paper in journal
Title:
- Authors:
- LEINER, SREÆKO (79862)
- ERBEN, RADOVAN (11296)
Journal: Hrvatska vodoprivreda
Number: 28
ISSN: 1330-321X
Volume: 4
Year: 1995
Pages: from 28 to 29
Number of references: 3
Language: hrvatski
- Type of paper
: Paper in journal
Title:
- Authors:
- LEINER, SREÆKO (79862)
- ERBEN, RADOVAN (11296)
Journal: Hrvatska vodoprivreda
Number: 30
ISSN: 1330-321X
Volume: 4
Year: 1995
Pages: from 34 to 36
Number of references: 4
Language: hrvatski
- Type of paper
: Paper in journal
Title:
- Authors:
- LEINER, SREÆKO (79862)
- ERBEN, RADOVAN (11296)
Journal: Hrvatska vodoprivreda
Number: 31
ISSN: 1330-321X
Volume: 4
Year: 1995
Pages: from 26 to 27
Number of references: 6
Language: hrvatski
- Type of paper
: Paper in journal
Title:
- Authors:
- LEINER, SREÆKO (79862)
Journal: Lovaèki vjesnik
ISSN: 0024-6999
Volume: 6
Year: 1995
Pages: from 30 to 32
Language: hrvatski
- Type of paper
: Paper in journal
Title:
- Authors:
- FAŠAIÆ, KREŠIMIR (7070)
Journal: Ribarstvo
Number: 1
ISSN: 1330-061X
Volume: 52
Year: 1994
Pages: from 49 to 50
Language: hrvatski
- Type of paper
: Paper in journal
Title:
- Authors:
- FAŠAIÆ, KREŠIMIR (7070)
Journal: Ribarstvo
Number: 2
ISSN: 1330-061X
Volume: 52
Year: 1994
Pages: from 91 to 92
Language: hrvatski
- Type of paper
: Paper in journal
Title: Influence of technological measures on changes in water
chemistry of carp fish ponds
- Authors:
- FAŠAIÆ, KREŠIMIR (7070)
- Debeljak, Ljubica
- Stojiæ, Biserka
- TURK, MIRKO (65816)
Journal: Ribarstvo
Number: 3
ISSN: 1330-061X
Volume: 52
Year: 1994
Pages: from 107 to 117
Number of references: 9
Language: hrvatski
Summary: Investigations on the changes of water chemistry in
conditions of variously treated fish ponds for culture of consumption fish
with special emphasis on the incoming water was carried out on the fish
farm "Draganiæi" in six experimental fish ponds: without fertilizer
(variant I) and fertilized with mineral fertilizer NPK (12:12:12) of a
total amount of 900 kg/ha (variant II) together with supplement feeding the
fish with grains, and without fertilizer with supplement feeding the fish
with industrial brickets with 18% protein (variant III). The stock density
of fish in all ponds was 3300 ind/ha. During the culturing season from June
to October, in all experimental fish ponds and in incoming water from the
Stojnica brook, an expressed variation of individual chemical determinants
were found, and the changes in the experimental ponds in comparison with
the incoming water was established. The results are presented in Tables
2-5. The minimum values O2 in variants II and III in comparison with the
incoming water were less by 27%, while the maximum values were increased by
33%. This shows the expression of a fluctuation of these chemical variables
in the experimental fish ponds. The amount of NH4+ increased in all
experimental fish ponds in relation to the incoming water, in variant I by
43%, in variant II by 93% and in variant III by 75%, on the average. The
amount of NO3- increased in comparison to the incoming water by 10%
(variant I), by 6% (variant II), and by 13% (variant III), on average, and
the amount of PO43- increased by 17% (variant I), by 207% (variant II) and
by 28% (variant III). The maximum values of orthophosphate increased in
variant II by 236%, while in variants I and III it was on the same level of
the incoming water.
Keywords: carp pond, water chemistry, fish nutrition, mineral fertilizer
- Type of paper
: Paper in journal
Title:
- Authors:
- FAŠAIÆ, KREŠIMIR (7070)
- Adamek, Zdenek
Journal: Ribarstvo
Number: 4
ISSN: 1330-061X
Volume: 52
Year: 1994
Pages: from 172 to 174
Language: hrvatski
- Type of paper
: Paper in journal
Title:
- Authors:
- FAŠAIÆ, KREŠIMIR (7070)
Journal: Ribarstvo
Number: 1
ISSN: 1330-061X
Volume: 53
Year: 1995
Pages: from 45 to 55
Language: hrvatski
Keywords: Tinca tinca
- Type of paper
: Paper in journal
Title: Croatian freshwater fisheries in 1993
- Authors:
- TURK, MIRKO (65816)
Journal: Ribarstvo
Number: 3
ISSN: 1330-061X
Volume: 52
Year: 1994
Pages: from 119 to 133
Number of references: 5
Language: hrvatski
Keywords: freshwater fisheries, Croatia
- Type of paper
: Paper in journal
Title: Histopathological changes of Dreissena polymorpha Pall.
(Bivalvia) and Planorbarius corneus L. (Gastropoda, Pulmonata) induced by
sodium pentachlorophenate
- Authors:
- KLOBUÈAR, GORAN IGOR VINKO (900420)
- LAJTNER (PEURAÈA), JASNA (165191)
- ERBEN, RADOVAN (11296)
Journal: Periodicum biologorum
Number: 4
ISSN: 0031-5362
Volume: 96
Year: 1994
Pages: from 493 to 495
Number of references: 3
Language: engleski
Keywords: Dreissena polymorpha, Planorbarius corneus, Na-PCP, histopathology
- Type of paper
: Paper in journal
Title:
- Authors:
- ERBEN, RADOVAN (11296)
Journal: Hrvatska vodoprivreda
Number: 10
ISSN: 1330-321X
Volume: 3
Year: 1994
Pages: from 10 to 10
Language: hrvatski
Keywords: Dreissena polymorpha
- Type of paper
: Paper in journal
Title:
- Authors:
- ERBEN, RADOVAN (11296)
- LAJTNER (PEURAÈA), JASNA (165191)
Journal: Hrvatska vodoprivreda
Number: 28
ISSN: 1330-321X
Volume: 4
Year: 1995
Pages: from 30 to 32
Language: hrvatski
Keywords: toxicity tests
- Type of paper
: Paper in journal
Title:
- Authors:
- PETERNEL, RENATA (94111)
- ERBEN, RADOVAN (11296)
Journal: Priroda
ISSN: 0351-0622
Year: 1995
Pages: from u tis to ku
Language: hrvatski
- Type of paper
: Paper in journal
Title:
- Authors:
- PETERNEL, RENATA (94111)
- ERBEN, RADOVAN (11296)
Journal: Priroda
ISSN: 0351-0622
Year: 1995
Pages: from u tis to ku
Language: hrvatski
- Type of paper
: Paper in journal
Title:
- Authors:
- LAJTNER (PEURAÈA), JASNA (165191)
- KLOBUÈAR, GORAN IGOR VINKO (900420)
Journal: Priroda
ISSN: 0351-0622
Year: 1995
Pages: from u tis to ku
Language: hrvatski
Keywords: Dreissena polymorpha
- Type of paper
: Paper in journal
Title:
- Authors:
- LAJTNER (PEURAÈA), JASNA (165191)
- KLOBUÈAR, GORAN IGOR VINKO (900420)
Journal: Priroda
ISSN: 0351-0622
Year: 1995
Pages: from u tis to ku
Language: hrvatski
Keywords: Dreissena polymorpha
- Type of paper
: Paper in journal
Title:
- Authors:
- LAJTNER (PEURAÈA), JASNA (165191)
- KLOBUÈAR, GORAN IGOR VINKO (900420)
Journal: Priroda
ISSN: 0351-0622
Year: 1995
Pages: from u tis to ku
Language: hrvatski
Keywords: Dreissena polymorpha
- Type of paper
: Paper in proceedings
Title: Technology of Carp Fry Rearing under Conditions of Croatia
- Authors:
- Debeljak, Ljubica
- Jirasek, Jiri
- Bebek, Željko
- FAŠAIÆ, KREŠIMIR (7070)
- Editors
- Spurny, Petr
Proceedings title: Proc. Int. Conf. "Production of Stock Material in Perspective Fish Species"
Language: èeški
Place: Brno, Èeška
Year: 1994
Pages: from 43 to 48
Meeting: Produkce nasad perspektivnich druhu ryb
Held: from 12/01/94 to 12/02/94
Summary: The paper deals with results of studies on effects of some
ecological and technological factors on the production results of carp fry
rearing in Croatian ponds. The dynamics of the development of natural food
and hydrochemical parameters was studied in four ponds with the area
ranging from 4.5 to 10.0 hectars and with density of 200,000 Co individuals
per hectar. There was a correlation between the availability of zoobenthos
and the weight gain of fry. The harvesting carried out after the
overwintering resulted in the catch of 23,000 to 25,000 C1individuals per
hectar. Production ranged from 1,074 to 1,657 kg per hectar, body mass of
C1 was 25 to 65 g and the survival ratio Co-1 ranged from 12 to 29%. A
higher coefficient of food conversion (3.0 to 3.8) was influenced by a low
degree of saturation of water with oxygen (20-30%) and a lower quality of
food.
Keywords: fry, rearing in ponds, hydrochemical regime, zooplankton, zoobenthos, production
- Type of paper
: Paper in proceedings
Title: Toxicological and anaesthesiological characteristics of
Pseudorasbora parva and its resistence against poor environmental
conditions
- Authors:
- Adamek, Zdenek
- FAŠAIÆ, KREŠIMIR (7070)
- Tarhovisky, R
- Editors
- Machova, Jana
- Vykusova, Blanka
- Svobodova, Zdenka
Proceedings title: Toxicita a biodegradabilita odpadu a latek vyznamnych ve vodnim prostredi
Language: èeški
Place: Milenovce, CZ
Year: 1995
Pages: from 65 to 69
Meeting: Toxicita a biodegradabilita odpadu a latek vyznamnych ve vodnim prostredi
Held: from 06/12/95 to 06/15/95
Summary: There is obvious from presented resultes that Pseudorasbora
parva can be considered as a species very resistant against unfavourable
environmental conditions. It is comparable with carp fingerlings in some
aspects (intoxications, oxygen consumption) but it is more sensitive to
anaesthetics treatment. From the point of view of its undesirable
accidental expansion (e.g.by transport with stocking fish) or surviving in
small water pools (e.g. in drained pond), there is important to take into
account that this species is more resistant against oxygen defficiency and
high temperature than other Central European original and introduced
fishes.
Keywords: Pseurasbora parva
- Type of paper
: Summary in proceedings
Title: Histomorphological and histochemical characteristics of
the digestive gland and the excretory organ of the edible snail (Helix
pomatia L.)
- Authors:
- Gomerèiæ, Hrvoje
- ERBEN, RADOVAN (11296)
- PETERNEL, RENATA (94111)
- Gomerèiæ, Vera
- Editors
- Gomerèiæ, Hrvoje
Proceedings title: Zbornik sažetaka priopæenja Petog kongresa biologa Hrvatske
Language: hrvatski
Place: Zagreb
Year: 1994
ISBN/ISSN: 953-6241-01-3
Pages: from 153 to 154
Meeting: Peti kongres biologa Hrvatske
Held: from 10/03/94 to 10/07/94
Summary: Connected with the development of ecotoxicology, the edible
snail (Helix pomatia L.) became very good test-organism for study of
pollution of the land ecosystems. For that reason, we studied
histomorphology and histochemistry of digestive gland and excretory organ
of the edible snail. The digestive gland is composed of numerous tubules,
crowded together, and very small quantity of connective tissue and
hemolymphatic spaces. The epithelial cells of tubules vary a great deal in
their appearance, they contain acidophilic plasm with numerous digestive
tube. Namely, in their basal part, there is located strong activity of DPN
diaphorase, and medium activity of acid phosphatase. There is weak activity
of alkaline phosphatase and nonspecific esterases. Activity of
dehydrogenases (Gl-6-P-Dh, L-Dh, S-Dh, alpha-GP-Dh) is very weak. The
excretory organ is composed by wide excretory tubules. This tubules are
lined with a simple columnar epithelium. The epithelium separates large
lumina of excretory tubules and thin hemolymphatic spaces. All of the
epithelial cells contain large vacuoles in their apical parts. In the plasm
of the epithelial cells we registered very strong activity of Gl-6-P-Dh,
and DPN diaphorase, but very weak activity of L-Dh, S-Dh, alpha-GP-Dh,
alkaline phosphatase, and nonspecific esterases. Activity of acid
phhosphatase is absent.
Keywords: Helix pomatia, digestive gland, histomorphological and histochemical characteristics
- Type of paper
: Summary in proceedings
Title: The phenomenon of the mussel Dreissena polymorpha Pall. in
the hydroaccumulation Modrac
- Authors:
- ERBEN, RADOVAN (11296)
- KLOBUÈAR, GORAN IGOR VINKO (900420)
- LAJTNER (PEURAÈA), JASNA (165191)
- Editors
- Gomerèiæ, Hrvoje
Proceedings title: Zbornik sažetaka priopæenja Petog kongresa biologa Hrvatske
Language: hrvatski
Place: Zagreb
Year: 1994
ISBN/ISSN: 953-6241-01-3
Pages: from 270 to 271
Meeting: Peti kongres biologa Hrvatske
Held: from 10/03/94 to 10/07/94
Summary: Dense populations of the mussel Dreissena polymorpha Pall.
were noticed in the hydraccumulation Modrac, near Tuzla, in 1988. This
phenomenon appears in the aquatic ecosystems all over Europe and it is
estimated that the Modrac phenomenon was the first extensive "infection" on
the South East of Europe. Since the larvae of D. polymorpha penetrate into
the pipes of the industrial waters, where they develop into adult forms,
water supply may drop by 50 %. Over a period of three years, from 1988 to
1990, extensive bio-ecological research works were carried out on 14 sites
on the lake Modrac, in order to find out the reason for the phenomenon of
highly dense populations of mussels. It was found out that the breeding
period lasts from May until October, reaching the peak point at the end of
June and at the beginning of July, when the number of larvae is in the
range of 157,400 ind/m3. Some favourable physico-chemical parameters can
induce the development of dense populations of D. polymorpha; these are
primarily the temperature, the amount of oxygen and the appropriate shape
of the nanophytoplankton, which is easily filtered by the animals.
Keywords: Dreissena polymorpha, hydroaccumulation Modrac
- Type of paper
: Summary in proceedings
Title: Histopathological changes of Dreissena polymorpha Pall.
(Bivalvia) and Planorbarius corneus L. (Gastropoda, Pulmonata) induced by
sodium pentachlorophenate
- Authors:
- KLOBUÈAR, GORAN IGOR VINKO (900420)
- LAJTNER (PEURAÈA), JASNA (165191)
- ERBEN, RADOVAN (11296)
- Editors
- Gomerèiæ, Hrvoje
Proceedings title: Zbornik priopæenja Petog kongresa biologa Hrvatske
Language: hrvatski
Place: Zagreb
Year: 1994
ISBN/ISSN: 953-6241-01-3
Pages: from 357 to 358
Meeting: Peti kongres biologa Hrvatske
Held: from 10/03/94 to 10/07/94
Summary: Dreissena polymorpha and Planorbarius corneus were exposed
to various concentrations of Na-PCP ranging from 0.1 mg/l to 2.4 mg/l in
semi-static toxicity tests over a period of 16 days. The 96-h LC50 value
for mussels was 0.42 mg/l and 1.44 mg/l for snails. Histological analysis
revealed that the first extensive degenerative changes (dilatation of
hemolymphatic spaces, necrosis and sloughing of gill epithelia) appeared on
gills of mussels. The next highly affected organ was the digestive gland,
the most sensitive organ in snails. Digestive diverticula in both species
showed increased vacuolation and necrosis of digestive cells which resulted
in localized disintegration of tubules. Intensive changes were also
observed on gonads. The digestive gland and gonads destruction was greatly
enhanced by strong bioaccumulation of lipophilic PCP. Severe gills damage
reduced resistance of mussels to Na-PCP compared to snails.
Keywords: Dreissena polymorpha, Planorbarius corneus, Na-PCP
- Type of paper
: Summary in proceedings
Title: The effect of phenol on survival and histopathological
changes in the digestive gland of snails Amphimelania holandri Fer.
(Prosobranchia) and Planorbarius corneus L. (Pulmonata)
- Authors:
- LAJTNER (PEURAÈA), JASNA (165191)
- Tutiš, Vesna
- ERBEN, RADOVAN (11296)
- KLOBUÈAR, GORAN IGOR VINKO (900420)
- Editors
- Gomerèiæ, Hrvoje
Proceedings title: Zbornik sažetaka priopæenja Petog kongresa biologa Hrvatske
Language: hrvatski
Place: Zagreb
Year: 1994
ISBN/ISSN: 953-6241-01-3
Pages: from 359 to 360
Meeting: Peti kongres biologa Hrvatske
Held: from 10/03/94 to 10/07/94
Summary: The effect of phenol on snails Amphimelania holandri Fer.
and Planorbarius corneus L., as a result of its accidental discharge, was
investigated under laboratory conditions. The snails were exposed to a
concentration range of 100 to 798 mg/l phenol. The 96-h semi-static test
was used. The 96-h LC50 values were estimated by the probit method. For A.
holandri this value was 137 mg/l phenol and for P. corneus 608 mg/l phenol.
For histopathological analysis the snails were placed in Bouin's fixative
for 24 h, embedded in paraffin and cut with a microtome. Histopathological
changes in the digestive gland of snail A. holandri were spotted in 250 and
300 mg/l phenol by the first day of the experiment. Increased cell
vacuolation and concentration of amoebocytes in the areas between tubules
being observed. The digestive gland of snail P. corneus exposed to high
concentrations of phenol (600 and 798 mg/l) for two days showed an acute
inflammatory reaction. By the third and fourth day of the experiment strong
necrotic changes in the digestive gland of both species became apparent. In
some places, total breakdown of tubules occurred and only aggregation of
cell particles stillremained.
Keywords: Amphimelania holandri, Planorbarius corneus, digestive gland, phenol, histopathological changes
- Type of paper
: Summary in proceedings
Title: Comparative investigations of glycogen body in various
bird species
- Authors:
- PETERNEL, RENATA (94111)
- Gomerèiæ, Hrvoje
- Editors
- Gomerèiæ, Hrvoje
Proceedings title: Zbornik sažetaka priopæenja Petog kongresa biologa Hrvatske
Language: hrvatski
Place: Zagreb
Year: 1994
ISBN/ISSN: 953-6241-01-3
Pages: from 154 to 155
Meeting: Peti kongres biologa Hrvatske
Held: from 10/03/94 to 10/07/94
Summary: Recent knowledge of the bird glycogen body is mainly based
upon the investigations of the domestic chicken and turkey. There have been
no systematical research of the glycogen body of the wild birds. Therefore,
in this paper a comparative research of this organ from large number of the
bird species has been preformed. For this purpose 41 bird species belonging
to 11 orders (22 families) have been investigated. For microscopical
observations were used these methods: hematoxiline-eosine histological
staining and PAS-reaction accompanied by diastase control staining for
visualization of glycogen location. It has been observed that all of the
investigated species posses the glycogen body, but its shape and position
differs from one to another order. Glycogen body is gelatinous structure
situated in the dorsomedial part of the spinal cord at the level of the
lumbosacral plexus. It is composed of the large cells, polygonal, round or
oval in shape, with eccentric dark nucleus surrounded by a rim of dense
cytoplasm. The remainder of the cell volume is occupied by glycogen
particles. Central channel of the spinal cord passes through the glycogen
bodies in all of the described species.
Keywords: glycogen body, birds
- Type of paper
: Summary in proceedings
Title: Freshwater fishes (Pisces) of the Istrian Peninsula
- Authors:
- LEINER, SREÆKO (79862)
- Povž, Meta
- Editors
- Gomerèiæ, Hrvoje
Proceedings title: Zbornik sažetaka priopæenja Petog kongresa biologa Hrvatske
Language: hrvatski
Place: Zagreb
Year: 1994
ISBN/ISSN: 953-6241-01-3
Pages: from 276 to 277
Meeting: Peti kongres biologa Hrvatske
Held: from 10/03/94 to 10/07/94
Summary: On streams, ponds and reservoirs of the Istrian Peninsula
twenty species and subspecies from 7 families as well as one hybrid Salmo
trutta m. fario x S. marmoratus had been registered between 1982 and 1993.
Twelve of them are indigenous and 8 introduced. Results are essentially
different compared to the literature data; 28 fish species and subspecies
from 11 families are listed as well as one species from the family
Petromyzontidae.
Keywords: freshwater fishes, Istrian Peninsula
- Type of paper
: Summary in proceedings
Title: Some Histopathological Effects of Na-PCP on the Gills and
the Digestive Gland of Dreissena polymorpha Pall. (Mollusca, Bivalvia)
- Authors:
- LAJTNER (PEURAÈA), JASNA (165191)
- ERBEN, RADOVAN (11296)
- KLOBUÈAR, GORAN IGOR VINKO (900420)
- Editors
- Kehrer, J.P.
- Chambers, P. L.
- Oehme, F. W.
- Menzel, D. B.
Proceedings title: Toxicology letters. Book of abstracts of the 33rd European Congress of Toxicolo
Language: engleski
Place: Amsterdam, NL
Year: 1994
ISBN/ISSN: 0378-4274
Pages: from 46 to 46
Meeting: EUROTOX '94. 33rd European Congress of Toxicology
Held: from 08/21/94 to 08/24/94
Summary: The toxicity of sodium pentachlorophenate (Na-PCP) to the
zebra mussel (Dreissena polymorpha Pall.) was studied in the laboratory for
16 days. The animals were exposed to the following concentrations: 0.1,
0.18, 0.32, 0.56 and 1 mg/l Na-PCP. The semi-static test was used. Gills of
mussels treated with 0.32 mg/l Na-PCP for 12 days showed moderate to
extensive epithelial necrosis, hemolymph sinuses were distended and
contained an amorphous precipitate. Exposure to greater concentrations of
Na-PCP (0.56 and 1 mg/l) for 4 days resulted in greater gill damage.
Epithelial necrosis and sloughing was massive and the only recognizable
gill structure was the chitinous rod. The digestive gland was also
affected. After 2 days at concentrations of 0.56 and 1 mg/l Na-PCP
increased cell vacuolation and concentration of amoebocytes in the areas
between tubules being observed. By the fourth day of the experiment
extensive sloughing lead to massive disorganization of the digestive gland.
Keywords: Dreissena polymorpha, histopathological effects, gills, digestive gland, Na-PCP
Other: Knjiga sažetaka objavljena u èasopisu "Toxicology letters"
koji se citira u: Science Citations Index, Current Contents (Life
Sciences), Biological Abstracts, Awareness in Biological Sciences (CABS)
- Type of paper
: Summary in proceedings
Title: Studies on the sublethal toxicity of calcium chloride and
calcium bromide solutions - "high density brines" to the freshwater snail
Planorbarius corneus L.
- Authors:
- Mažuran, Neda
- Tomiæ, Mihovil
- KLOBUÈAR, GORAN IGOR VINKO (900420)
- Papeš, Dražena
- Editors
- Sram, R. J.
- Parry, J. M.
- Binkova, B.
- Mohn, G. R.
Proceedings title: Abst. Book 25th Annual Meeting of the European Environmental Mutagen Society
Language: engleski
Place: Noordwijkerhout, Nizozemska
Year: 1995
Pages: from 284 to 284
Meeting: EEMS '95. 25th Annual Meeting of the European Environmental Mutagen Society
Held: from 06/18/95 to 06/23/95
Summary: Saturated water solutions of calcium chloride (481.3 g
CaCl2/l) and calcium bromide (1065.9 g CaBr2/l) as well as their mixture,
commercially prepared as "high density brines", are regularly used during
special operations in oil exploration and production. Depending on
operation conditions, 5-20 m3 of a high density brine is used per well.
Various concentrations of these solutions end up in the environment and may
pollute fresh and ground waters. In this study, the toxicity of several
concentrations of these water solutions to the freshwater snail
Planorbarius corneus L. was tested. During the six weeks exposure in three
sublethal concentrations of CaCl2 solution, considerably reduced fecundity
was found; it decreased with the increase of concentration (P<0.01). Also,
the growth of the snail's shells in the test-solutins was considerably
smaller than in the controls with standard water. The CaBr2 and CaBr2/CaCl2
mixture solutions of the same concentrations showed a stronger toxic effect
(P<0.01), and in addition to reduced fecundity some concentrations caused
moortalities. After exposure, all the animals' tissues were examined for
pathological changes. To estimate the toxicity results, the chemicals were
tested on some plant test-systems as well.
Keywords: Planorbarius corneus, calcium chloride, calcium bromide
- Type of paper
: Summary in proceedings
Title: Phenol Accumulation in the Freshwater Invertebrates
- Authors:
- ERBEN, RADOVAN (11296)
- LAJTNER (PEURAÈA), JASNA (165191)
- KLOBUÈAR, GORAN IGOR VINKO (900420)
- Editors
- Kehrer, J.P.
- Chambers, P. L.
- Oehme, F. W.
- Menzel, D. B.
Proceedings title: Toxicology letters. Abstracts of the 34th European Congress of Toxicology
Language: engleski
Place: Amsterdam, Nizozemska
Year: 1995
ISBN/ISSN: 0378-4274
Pages: from 32 to 32
Meeting: EUROTOX '95. 34th European Congress of Toxicology
Held: from 08/27/95 to 08/30/95
Summary: In an aerated batch experiment from one to six days the
phenol accumulation is investigated in the alive and dead freshwater
invertebrates. The following species were used: Polycelis felina
(Turbellaria), Amphimelania holandri, Fagotia esperi, Sadleriana
fluminensis, Lymnaea stagnalis, Physa fontinalis and Radix peregra
(Gastropoda), Asellus aquaticus, Gammarus fossarum (Crustacea) and Agrion
puella (Insecta). The concentrations of phenol ranged from 25 to 400 mg/l
in portions of 25 mg/l. Some physico-chemical parameters linked to the
toxic effect of phenol were measured: water temperature, pH, total hardness
and oxygen concentration. During the experiment the number of saprophytic
bacteria and the concentrations of phenol were measured too. The phenol
accumulation in wet tissue is always higher in the alive individuals than
in the dead ones, but it shows an identical time trend for both. On the
first two days, accumulation is high, than decreasees till the end of the
experiment and lower lethal limit is near to 20 ug/g of body weight. In the
acute poisoning this limit is impossible to established. The measured
actual accumulation is the result of changing intake and elimination rates
decreasing with increasing duration of tests and test concentration due to
metabolic disturbances. The measured physico-chemical parameters do not
show any correlation with toxicity of phenol, except oxygen, which was
compensated by aeration.
Keywords: phenol, freshwater invertebrates, accumulation, mortality
Other: Sažeci s Kongresa objavljeni su u èasopisu "Toxicology
letters" koji se citira u: Science Citation Index, Current Contents (Life
Sciences), Biological Abstracts, Current Awareness in Biological Sciences
(CABS)
- Type of paper
: Summary in proceedings
Title: Histopathological Effects of Na-PCP on the Snails
Amphimelania holandri Fer. and Planorbarius corneus L.
- Authors:
- LAJTNER (PEURAÈA), JASNA (165191)
- KLOBUÈAR, GORAN IGOR VINKO (900420)
- ERBEN, RADOVAN (11296)
- Editors
- Kehrer, J.P.
- Chambers, P. L.
- Oehme, F. W.
- Menzel, D. B.
Proceedings title: Toxicology letters. Abstracts of the 34th European Congress of Toxicology
Language: engleski
Place: Amsterdam, Nizozemska
Year: 1995
ISBN/ISSN: 0378-4274
Pages: from 52 to 52
Meeting: EUROTOX '95. 34th European Congress of Toxicology
Held: from 08/27/95 to 08/30/95
Summary: The snails Amphimelania holandri and Planorbarius corneus
were exposed to 0.56 and 1 mg/l Na-PCP for 16 days. The pathological
alterations were first evident in the gills of A. holandri treated with 1
mg/l Na-PCP for 3 days and 0.56 mg/l Na-PCP for 4 days. Subchronic exposure
resulted in greater gill damage. Epithelial necrosis and sloughing were
massive and the only recognizable gill structure was the chitinous rod. The
digestive gland, gonads and kidney were also affected. Extensive damage of
these organs was observed after 6 days. Snail P. corneus was more
resistant. The first changes in gonad and digestive gland were evident
after 4 days of exposure to 1 mg/l Na-PCP and after 6 days of exposure to
0.56 mg/l Na-PCP.
Keywords: Amphimelania holandri, Planorbarius corneus, Na-PCP, histopathological effects
Other: Sažeci s Kongresa objavljeni su u èasopisu "Toxicology
letters" koji se citira u : Science Citations Index, Current Contents (Life
Sciences), Biological Abstracts, Current Awareness in Biological Sciences
(CABS)
- Type of paper
: Ph.D.
Title: Comparative investigations of glycogen body in various
bird species
Faculty: Veterinarski fakultet Sveuèilište u Zagrebu
Author: PETERNEL RENATA
Date of defense: 07/11/94
Language: hrvatski
Number of pages: 144
Keywords: histology, birds, glycogen body
- Type of paper
: M.A.
Title: Toxicity of sodium-pentachlorophenate in Planorbarius
corneus L. (Gastropoda, Pulmonata) under the conditions of acute and
subchronic poisoning
Faculty: Prirodoslovno matematièki fakultet Sveuèilište u Zagrebu
Author: KLOBUÈAR GORAN IGOR VINKO
Date of defense: 03/15/95
Language: hrvatski
Number of pages: 79
Summary: The toxicity of sodium-pentachlorophenate (Na-PCP) to
pulmonate snail Planorbarius corneus L. was studied under the
laboratory conditions. During 16 days, animals were exposed to
following concentrations of Na-PCP (technical grade): 0.56 mg/l,
0.74 mg/l, 1 mg/l, 1.8 mg/l and 2.4 mg/l. The value of medium
lethal concentration (LC50) after 46 h of the experiment was 1.46
mg/l.
Apart from dying, behavioural changes, as well as the
physiological, biochemical and histological changes in a snail were being
observed. The most intensive histopathological changes were noticed in the
digestive gland and the hermaphrodite gland. These extensive damages could
be explained by the high lipid content in these organs which cause strong
accumulation of PCP. Changes in the digestive gland started with the
vacuolisation and swelling of digestive cells and was followed by breakdown
of cell membranes, which caused accumulation of cell contents in the lumen
of tubules. In some places, further necrotic changes resulted in complete
destruction of tubules. Degenerative changes off germinal tubules in the
hermaphrodite gland primarily occured in developmental stages of sperm
cells, and then in oocytes. Subsequently, they resulted in decreased number
of spermatozoides and extensive deformations of remaining male and female
germ cells (pyknosis and fragmentation of the nucleus). Changes in the
excretory organ included increased vacuolisation in excretory cells,
breakdown of their membranes and release of its contents into the lumen of
the organ. Intensified activity of excretory organ in order to facilitate
animal's detoxication led to these extensive damages.
Research has shown that tNa-PCP in concentrations from 0.56 to 2.4
mg/l causes, in vivo, increased concentration of cytochrome P-450 in
digestive gland of snail P. corneus. Since chlorophenols are weak inducers
of Cyt P-450 concentration I asume that increase in Cyt P-450 concentration
is partly or fully due to the impurities in tNa-PCP. PCDD-s and PCDF-s are
major constituents of the impurities. Results of this experiment point out
that P. corneus does posses MFO system. This experiment is one of the first
of such kind which has shown that freshwater molluscs do have the MFO
system.
An absence of change of activity of mitochondrial cytochrome
oxidase in the digestive gland treated with tNa-PCP had confirmed
that uncouplers of oxidative phosphorylation do not interfere with electron
carriers in electron transport through mitochondrial membrane.
Measurements of lipid peroxidation showed intensive increase
of amount of malondialdehyde (MDA) as a result of free radicals
generation in microsomes of digestive gland of P. corneus when
exposed to tNa-PCP. Increase of MDA, but to a much lesser extent
was evident in microsomes of foot cells too. The main cause of
higher lipid peroxidation in this investigations is probably cell
tissue destruction which results in release of potent hydrolytic
enzymes and transition metal ions in cytosol. I presume that
increased generation of free radicals, therefore also increased
lipid peroxidation, is partly caused by extensive oxygen uptake of animals
intoxicated with PCP. Heat released during uncoupling of oxygen
phosphorylation, and increased activity of MFO could have also contributed
to higher lipid peroxidation.
The results of this work verify above mentioned techniques,
especially lipid peroxidation measurement and histopathology, as
useful monitoring tools for estimating chlorophenol pollution of
water ecosystems. They also encourage use of these techniques in
all future ecotoxicological studies.
Keywords: Planorbarius corneus, snails, histopathology, pentachlorophenol, digestive gland, cytochrome P-450, lipid peroxidation, cytochrome oxidase
- Type of paper
: Mentorship
Title:
Faculty: Prirodoslovno matematièki fakultet Sveuèilište u Zagrebu
Mentor: ERBEN RADOVAN
Date of defense: 12/22/94
Number of pages: 80
Author: Bjeliæ mr. Sabrija
Degree level: M.A.
- Type of paper
: Mentorship
Title: Toxicity of sodium-pentachlorophenate in Planorbarius
corneus L. (Gastropoda, Pulmonata) under the conditions of acute and
subchronic poisoning
Faculty: Prirodoslovno matematièki fakultet Sveuèilište u Zagrebu
Mentor: ERBEN RADOVAN
Date of defense: 03/15/95
Number of pages: 79
Author: KLOBUÈAR GORAN IGOR VINKO
Degree level: M.A.
- Type of paper
: Mentorship
Title:
Faculty: Prirodoslovno matematièki fakultet Sveuèilište u Zagrebu
Mentor: ERBEN RADOVAN
Date of defense: 09/27/95
Number of pages: 72
Author: Banovac Vesna
Degree level: D.A.
- Type of paper
: Mentorship
Title:
Faculty: Prirodoslovno matematièki fakultet Sveuèilište u Zagrebu
Mentor: ERBEN RADOVAN
Date of defense: 05/27/94
Number of pages: 74
Author: Jozanoviæ Marko
Degree level: D.A.
- Type of paper
: Mentorship
Title:
Faculty: Prirodoslovno matematièki fakultet Sveuèilište u Zagrebu
Mentor: ERBEN RADOVAN
Date of defense: 07/14/95
Number of pages: 78
Author: Banjad Blaženka
Degree level: D.A.
- Type of paper
: Mentorship
Title:
Faculty: Prirodoslovno matematièki fakultet Sveuèilište u Zagrebu
Mentor: ERBEN RADOVAN
Date of defense: 07/14/95
Number of pages: 98
Author: Špoljar Maria
Degree level: D.A.
- Type of paper
: Mentorship
Title:
Faculty: Prirodoslovno matematièki fakultet Sveuèilište u Zagrebu
Mentor: ERBEN RADOVAN
Date of defense: 03/10/95
Number of pages: 72
Author: Babiæ Barbara
Degree level: D.A.
- Type of paper
: Mentorship
Title:
Faculty: Prirodoslovno matematièki fakultet Sveuèilište u Zagrebu
Mentor: LEINER SREÆKO
Author: Jokiæ Marija
Degree level: D.A.
- Type of paper
: TV broadcast
Title:
- Authors:
- LEINER, SREÆKO (79862)
TV station: HRT I program
Name of emission (broadcast): Obrazovni program
Year: 1995
Language: hrvatski
- Type of paper
: TV broadcast
Title:
- Authors:
- ERBEN, RADOVAN (11296)
- LAJTNER (PEURAÈA), JASNA (165191)
- KLOBUÈAR, GORAN IGOR VINKO (900420)
TV station: HRT I program
Name of emission (broadcast): Obrazovni program
Year: 1995
Language: hrvatski
- Type of paper
: TV broadcast
Title:
- Authors:
- ERBEN, RADOVAN (11296)
TV station: HRT I program
Name of emission (broadcast): Obrazovni program
Year: 1994
Language: hrvatski
- Type of paper
: Invited lecture
Title: Limnological investigations of freshwaters in Croatia
Institution: Universita degli studi di Udine
Year: 1995
- Type of paper
: Invited lecture
Title: Toxicological effects of petrochemicals on the freshwater
invertebrates
Institution: Universita degli studi di Udine
Year: 1995
- Type of paper
: Invited lecture
Title: Hydrographic and biological characteristics of the
National park Plitvice Lakes
Institution: Universita degli studi di Udine
Year: 1995
- Type of paper
: Invited lecture
Title: Biology of genus Daphnia
Institution: Institut "Ruðer Boškoviæ"
Year: 1995
- Type of paper
: Other
Title: The Tench (Tinca tinca L. 1758). Distribution in Croatian
waters and its commercial importance.
- Authors:
- LEINER, SREÆKO (79862)
- FAŠAIÆ, KREŠIMIR (7070)
- TURK, MIRKO (65816)
Type of work: International Workshop on Biology and Culture of the Tench (Tinca tinca L.)
Language: engleski
Summary: There are only three Euro-Siberian genera of Cyprinidae:
Rutilus, Leuciscus and Tinca. The genus Tinca, which includes a single
recent species, has direct phyletic relations to several fossil forms from
the Oligocene and Miocene of Central Europe. Distribution data of tench in
Croatian waters started in 1843, but the systematic research are still
missing. Originally, this species belongs to the Sava River catchment area
(Black Sea drainage), but introduction to the Adriatic rivers and lakes
usually took place uncontrolled, along with the carp introduction. Islands
of Cres and Pag are examples of such artificial introduction, and at the
same time examples of extremely good adaptation of tench to different
environmental requirements. Ten years of tench production statistics on
fishfarms show rapid decrease in last three years: 59 x 10 3 kg in 1990 to
9 x 10 3 kg in 1992. The same trend is present in hatcheries. Most
endangered regions for this species in Croatia are discussed as well.
Keywords: tench (Tinca tinca), distribution, Croatia,
