SVIBOR - Papers quoted in CC - project code: 4-05-007

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SVIBOR - Collecting Data on Projects in Croatia


Papers quoted in Current Contents on project 4-05-007


Quoted papers: 6
Other papers: 50
Total: 56


Title: 137Cs in flowers, pollen and honey from the Republic of Croatia for years after the Chernobyl accident.

Authors:
Barišić, Delko (129652)
Lulić, Stipe (26872)
Kezić, Nikola (20862)
Vertačnik, Astrea (51901)
Journal: Apidologie
Number: 1
ISSN: 0044-8435
Volume: 23
Year: 1992
Pages: from 71 to 78
Number of references: 5
Language: engleski
Summary: Cesium in hony corresponds well with 137Cs contamination ofterritory in the Republic of Croatia. Equal cesiym concentrationin the surface soil layer results in higher cesium activities inhoney in the case of medow flowers honey bee pasture than incases when pasture is based on bush or tree flowers. Higher 137Csactivity in pollen than in honey indicates that cesium behavesanalogously to potassium.
Keywords: radioactivity, cesium, flowers, pollen, honey, Chernobylaccident, Croatia

Title: Induction of mixed function oxidase activity in honey bee as a bioassay for detection of environmental xenobiotics

Authors:
Kezić, Nikola (20862)
Lucić, Davor
Sulimanović, Đuro
Journal: Apidologie
Number: 23
ISSN: 0044-8435
Volume: 23
Year: 1992
Pages: from 217 to 223
Number of references: 19
Language: engleski
Summary: The level of bezo-a-pyrene monooxidase (B(a)PMO) activity inhoney bees exposed to a sugar syrup containing benzo(a)pyrene(B(a)P) increased after 2 days of exposure. For different dosesand at all concentrations, maximal induction (5 - 25 fold) wasobtained on the 9th day of the experiment. At the nextmeasurement (13th day), the B(a)P activity had decreased at allconcentrations. Finally, 20 days after exposure the result wasnear the control values. The results showed good correlationbetween the dose and the activity of B(a)PMO. From many drugsused for the treatment against Varroa jacobsoni, we tested therecommended and most effective drugs, Apitol and Apistan. Bothdrugs increased B(a)PMO activity slightly les then the lowestdose of B(a)P. The dose of 5.5 mg/kg bw (body wight of bees)B(a)P increased B(a)PMO activity by 480 %. The dose of Apitolrecomended by the producer inreased B(a)PMO activity by 300 %,and the recommended dose of Apistan increased the activity by380%. Mixed function oxidase (MFO) activity could also measureharmful effects of pollutants in bees as early, sublethal,objectively (ie instrumetally) measurable biochemical parameters.
Keywords: Apis mellifera, mixed function oxidase, sublethal effect, acaricide, Varroa disease,

Title: Comparasion of brood and pollen amount and productivity of 3 strains of A. m. carnica

Authors:
Kezić, Nikola (20862)
Pechhacker, Hermann
Poklukar, Janez
Bubalo, Dragan
Dražić, Marica
Ruttner, F.
Journal: Apidologie
Number: 5
ISSN: 0044-8435
Volume: 25
Year: 1994
Pages: from 485 to 487
Language: engleski
Summary: A comparative study was made in 1993 between an alpine (ecotype A, lunz am See, Austria) and a pannonian ecotype (C, from Sunja, Croatia) of A. m. carnica in the native country as well as in the country of the other ecotype. A third ecotype S from Slovenia (subalpin) was included in this stady in both experimental years. The areas of open and sealed brood and pollen cells were marked on cellophane sheets on the same day every fortnight. In both locations significant differences were found between the different ecotypes in the area of open brood (in Lunz/see the average of ecotype A was 8022, C 9055 and S 6962 cells, and in Zagreb A=7648, C=9347 and S=7077 cells per measurement and per colony) and in the number of drone brood cells, the highest differences were also found between the ecotypes C and S (P<0.01).
Keywords: Apis mellifera carnica, ecotype, brood, pollen, productivity

Title: Cubital index and behavioural characteristic of the hony bee Apis mellifera carnica

Authors:
Poklukar, Janez
Kezić, Nikola (20862)
Pechhacker, Hermann
Journal: Apidologie
Number: 5
ISSN: 0044-8435
Volume: 25
Year: 1994
Pages: from 494 to 495
Language: engleski
Summary: Carnica queens of 3 different groups, each with 36 half-sisters from Croatia, Slovenia and Austrija were divided in to 9 subgroups and introducet in to colonies of 3 apiaries in Grubišno Polje (Croatia), Lunz am See (Austria) and Senicno (Slovenia), respecitvely. In autumn 1993 the cubital index was measured on smaples containing 40-100 bees from 85 colonies in total. The results show that the cubital index was strongly influenced by the location of the apiary. The cubital index showed no relation to calmness of the bees, but a negative relationship existed with agressiveness (x=3.07, b=0.232, p<0.104) and a positive one with the swarming tendency (x=3.57, b=0.416, p<0.112).
Keywords: Apis mellifera carnica, ecotype, cubital index

Title: 40K, 134Cs and 137Cs in pollen, honey soil surface layer in the Croatia

Authors:
Barišić, Delko (129652)
Lazarić, Katica (109354)
Lulić, Stipe (26872)
Vertačnik, Astrea (51901)
Dražić, Marica
Kezić, Nikola (20862)
Journal: Apidologie
Number: 6
ISSN: 0044-8435
Volume: 25
Year: 1994
Pages: from 585 to 595
Number of references: 17
Language: engleski
Summary: Specific activities of 40K, 134Cs and 137Cs in pollen, honey and in the first 25 cm of the surface soil layer were measured by gamma-spectrometry. Specific activity of 40K in pollen is about 1 order of magnitude higher than in honey. A 40K soil-to-pollen transfer coefficient (TC(40K)) of 0,436 +-0,054 and soil-to-honey transfer coefficient TC(40K) of 0,052+-0,008 were calculated as the mean of their respective values in 26 different segments of soil profile. 134Cs and 137Cs specific activities in pollen and honey decrease with time, resulting in a decrease of 137Cs soil-to-honey transfer factors (Tf(137Cs)) over time. The increase of the soil-to-honey Tf(137Cs) with increasing soil depth is a consequence of vertical distribution of 137Cs in soil. Soil-to-honey Tf(137Cs) values are highest in meadow and mixed honey types and lowest in bush/tree honey. Similar trends are found for both Tf(134Cs) and Tf(137Cs). The results presented here indicate the importance of the caesium inventory in soil segments where plant root systems are developed.
Keywords: potassium, caesium, honey, pollen, soil, transfer factor, radioactive contamination

Title: Estimination of heritability of some characteristics of hind legs and wings of honey bee workers (Apis mellifera carnica Polm) using the half-sibs method

Authors:
Poklukar, Janez
Kezić, Nikola (20862)
Journal: Apidologie
Number: 1
ISSN: 0044-8435
Volume: 25
Year: 1994
Pages: from 3 to 11
Number of references: 18
Language: engleski
Summary: Morphometrical investigations were done on 732 honeybee workers from 44 colonies in the apiary of the Agricultural Institute of Slovenia. Fore- and hind-wing araea, cubital index, length of hairs on tergite 5, side surfaces of tbia, femur and metatarsus, and the length of tibial hairs on the prepared hind legs were measured. The total side surfaces of hind-leg and wings were calculated. Investigated characteristics of bees were divided into 2 groups: the firs group included hind-leg and wing sizes while the second included hairs and index characteristics. The characteristics from the first group showed more expressed phenotypic and genetic correlation than the characteristics from the second group. All estimated heritabilities were large and significant. In an artificial selection of described properties of bees the selected traits are more or less cuccessfully changed, the unselected characteristics are always a compromise between genetic relationships to the selected trait, and selection due to environment.
Keywords: population genetics, heritability, biometry, half-sibs method

Title: Beekeeping in the Republic of Croatia past and present

Authors:
Kezić, Nikola (20862)
Šver, Zvonimir (190953)
Capan, Nikola (101136)
Mišanović, Đuro (176711)
Dražić, Marica
Bubalo, Dragan
Number: bree
Volume: Bee
Year: 1995
Pages: from 5 to 7
Number of references: 111
Language: engleski
Summary: Beekeeping in the Republic of Croatia has a long tradition. Our magazine "Pcela" has 114 years of continuous Publishing. The last ten years the number of beekeepers has oscillated between 10 - 12 thousand, and in their possession the number of beecolonies oscillated between 100 - 120 thousand. The majority of commercial beekeepers and beecolonies is situated in the continental part of country. These colonies start their spring development in February but can be stopped by colder and wet weather in the next month. Nevertheless, in April we have the first natural swarms. The first queens are produced in the middle of May on the continental area, but on the Islands they can be produced by the end of April. The dominant bee product is honey, but our beekeepers produce significant quantities of wax, pollen, propolis, bee-venom, queens, swarms and some royal jelly.
Keywords: Beekeeping, queen production, islands

Title: Oilseed rape and bees in Croatia

Authors:
Mustapić, Zdravko
Pospišil, Milan
Dražić, Marica
Kezić, Nikola (20862)
Number: bree
Volume: Bee
Year: 1995
Pages: from 48 to 55
Number of references: 111
Language: engleski
Summary: Besides sunflower, oilseed rape is the most important oil plant in Croatia. Before the war, oilseed rape was grown on as many as 29,000 ha while today there are only 12 - 15,000 ha under this crop. Oil demand could be satisfied by planting major oil plants on 120,000 - 130,000 ha, that is, on less than 10% of arable areas of Croatia, which is considered as optimal for a modern plant production system. Respecting the demand for soybean grits, half of these areas should be under soybean while sunflower and oil rape should be grown on the other half. There are 60,000 beehives in Croatia, only 25% of which are kept in movable hives. Of the total number of bee colonies in Croatia, one third is in the regions unsuitable for oil rape planting (Dalmatia). The remaining two thirds of colonies, barely sufficient for pollination of the existing areas under oil rape, are not all of them engaged on oil rape because of simultaneous flowering of other honey plants. If areas under oil rape are expanded to the recommended 30,000 - 40,000 ha, and the negative trend in bee-keeping is continued, lack of pollinators on planted areas will be felt very soon.
Keywords: Apis mellifera carnica, oil rape, pollination

Title: Cubital index of honeybee workers (Apis mellifera carnica) of three different origins on three different locations

Authors:
Poklukar, Janez
Pechhacker, Hermann
Kezić, Nikola (20862)
Number: bree
Volume: Bee
Year: 1995
Pages: from 21 to 23
Number of references: 111
Language: engleski
Summary: Cubital index of honeybee workers of three different origins of Apis mellifera carnica managded on three different locations was investigated. Interaktion between the origin of queens and environment induced significantly different values of cubital index on different locations at the same origin of queens.
Keywords: Apis mellifera carnica, cubital index, ecotype

Title: Breeding ligurian queen bees (Apis mellifera ligustica) on Kangaroo island, South Australia

Authors:
Woodward, D.R.
Kezić, Nikola (20862)
Number: bree
Volume: Bee
Year: 1995
Pages: from 32 to 37
Number of references: 111
Language: engleski
Summary: Kangaroo Island, located off the southern of South Australia, has been home to an isolated reserve of an ecotype of Apis mellifera ligustica for 110 years. While the origin of the initial Italian bees imported is still debated by scientists and historians, hybridisation after inception of the sanctuary in 1885 seems unlikely. The isolation of the island and a recent proclamation have helped to preserve a relatively disease free population. Limitations exist within the ecotype with regard to brood survival, reduced sex alleles and an inconsistent colour line, however these factors can be largely overcome through careful selection of queen mother colonies by queen breeders, and outcrossing with feral stock throught the island to utilise the available variation in the population.
Keywords: Apis mellifera ligustica, breeding, selection, Kangaroo Island

Title: Long term behaviour of 137Cs and 40K in honey in Croatia

Authors:
Barišić, Delko (129652)
Lulić, Stipe (26872)
Vertačnik, Astrea (51901)
Dražić, Marica
Kezić, Nikola (20862)
Number: Bree
Volume: Bee
Year: 1995
Pages: from 56 to 60
Number of references: 111
Language: engleski
Summary: Activities of 137 Cs and 40 K were measured by gamma-spectrometry method in honey samples collected each year from 1990 to 1994 from northern and nirth-western parts of the Republic of Croatia territory. Activities of 137 Cs in honey decrease continuously during this period, supporting previously observed indications that caesium transfer from soil to plants is the temporally variable parameter. In cases of meadow-flowers bee pasture type, 137 Cs activity in honey decreases significantly faster than in cases when bee pasture was based on bush and/or tree flowers. Activities of 40 K have very stable values over time. but that fact is not sufficient to exclude possible competitive effects of potassium uptake on caesium uptake. Results indicate the importance of free caesium presence in soil, where plant roots systems are developed, on the caesium uptake from soil to plants and honey.
Keywords: Caesium, pottasium, honey, soil, plant

Title: Accidental poisonings of honeybees in Croatia in the period 1980-1990

Authors:
Dražić, Marica
Hrlec, G.
Srebočan, Emil (101566)
Kezić, Nikola (20862)
Number: bree
Volume: Bee
Year: 1995
Pages: from 61 to 62
Number of references: 111
Language: engleski
Summary: Investigation of poisonings of honeybees have been carried out by the Veterinary faculty and Faculty of Agriculture Univeristy of Zagreb. 57 samples of poisoned bees were analysed between 1980 and 1990. Analyses for pesticide residues were carried out only in samples where bee diseases were not detected. Analyses were carried out with gas liquid chromatography (GLC) or high preassure liquid chromatography (HPLC), and in a few cases, thin liquid chormatography (TLC) was used. From 1980 to 1985 70% of total mortalities occurred. With large scale of application of selective insecticides after 1984. the number of affected apiaries was reduced. The number of poisoned bee colonies during the peroid of examination was larger than 3000. The data about involved bee colonies were not always exact. Insecticides caused poisonings in 82%, fungicides in 7%, a combination of insecticide and fungicide in 4%, and in 7% the cause of death was not identified.
Keywords: Honeybees, poisonings, pesticide residuals


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