SVIBOR - Papers quoted in CC - project code: 1-08-334
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SVIBOR - Collecting Data on Projects in Croatia
Papers quoted in Current Contents on project 1-08-334
Quoted papers: 4
Other papers: 54
Total: 58
Title: The habitat quality index applied to New Mexico streams
- Authors:
- LEINER, SREÆKO (79862)
Journal: Hydrobiologia
ISSN: 0018-8158
Year: 1995
Pages: from 1 to 13
Number of references: 29
Language: engleski
Summary:
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.
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gospodarenje
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New Mexico, management
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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: habitat 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.
Title: The Contribution of Gastropod Biomass in Macrobenthic
Communities of a Karstic River
- Authors:
- Habdija, Ivan
- LAJTNER (PEURAÈA), JASNA (165191)
- Beliniæ, Ines
Journal: Int. Revue ges. Hydrobiol.
Number: 1
ISSN: 0020-9309
Volume: 80
Year: 1995
Pages: from 103 to 110
Number of references: 21
Language: engleski
Summary:
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: freshwater gastropods, biomass, trophic relationships, karstic running waters
Title: Acute toxicity of some evaporating hydrocarbons for
freshwater snails and crustaceans
- Authors:
- ERBEN, RADOVAN (11296)
- PIŠL, ZORAN (82896)
Journal: Int. Revue ges. Hydrobiol.
Number: 1
ISSN: 0020-9309
Volume: 78
Year: 1993
Pages: from 161 to 167
Number of references: 24
Language: engleski
Summary: Some typical and more frequent freshwater invertebrates of
running waters were studied to examine the influence of styrene , xylene
and benzene on their mortality. Snails Amphimelania holandri Fer. and
Lymnea stagnalis L. and crustaceans Asellus aquaticus L. and Gammarus
fossarum Koch., were used in the semi-static test. Compounds were added in
volume concentrations of 0.005 to 0.4% v/v. For all concentrations LC50 was
calculated by probit method, which demonstrated that mortality depends much
more on increased concentrations (depending on the initial concentration)
than on lenght of exposure. Styrene was the most toxic,followed by xylene
and than benzene. The species G. fossarum showed marked sensitivity,
followed by A. aquaticus, and the species A. holandri and L. stagnalis
showed less sensitivity.
Keywords: aromatic hydrocarbons ,acute toxicity, freshwater snails and crustaceans, mortality
Title: Horizontal and vertical distribution of the zebra mussel
(Dreissena polymorpha Pallas) larvae in the Modrac Reservoir, Bosnia and
Herzegovina
- Authors:
- ERBEN, RADOVAN (11296)
- LAJTNER (PEURAÈA), JASNA (165191)
- LEINER, SREÆKO (79862)
- Bjeliæ, Sabrija
Journal: Int. Revue ges. Hydrobiol.
Number: 3
ISSN: 0020-9309
Volume: 80
Year: 1995
Pages: from u tis to ku
Number of references: 26
Language: engleski
Summary: In the Modrac Reservoir, loaded with coal separation
suspended material, rapid development of the zebra mussel (Dreissena
polymorpha) took place from at least 1987. It is probably the first
distinguished "infection" for this part of Balkan Peninsula, caused by this
organism. Horizontal and vertical distribution of this mussel, at 15
different reservoir profiles, had been investigated.
Keywords: zebra mussel (Dreissena polymorpha), planktonic larvae, horizontal and vertical distribution, dam reservoir
Information: svibor@znanost.hr
