SVIBOR - Project code: 4-06-014

MINISTRY OF SCIENCE AND TECHNOLOGY

Strossmayerov trg 4, HR - 10000 ZAGREB
tel.: +385 1 459 44 44, fax: +385 1 459 44 69
E-mail: ured@znanost.hr

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Project code: 4-06-014


Ecological, biological and technological aspects of fresh-water fisheries


Main researcher: TREER, TOMISLAV (111613)



Assistants
Type of research: applied
Duration from: 01/01/91. to 01/01/95.

Papers on project (total): 107
Institution name: Agronomski fakultet, Zagreb (178)
Department/Institute: Department for Fisheries, Beekeeping and Special Zoology
Address: Svetošimunska 25
City: 10000 - Zagreb, Croatia
Communication
Phone: 385 (0)1 2335777/4071
Fax: 385 (0)1 215 300
E-mail: treer@agr.hr

Summary: During the last five years investigations were conducted on several common carp and rainbow trout ponds, as well as on the Croatian open waters. The hydrochemical conditions on carp ponds were unfavourable during the summer, with the most frequent changes in the quantity of O2, BOD and COD. The use of potassium salt improved water quality a lot. The qualitative structure and quantity of phytoplankton did not show significant differences after the use of mineral fertilizer and chicken manure. The best economic results were achieved when cereal feed was followed by fertilization. The extended investigations of carp and trout intensive feeding resulted in formulation of several commercial feeds. The use of inactive yeast in carp starters resulted in favourable specific mass increments, low feeding coefficients and higher survival. The use of nutritive antibiotic as growth promotor gave good results. Ichthyohaematological investigations showed the importance of the analyses of periferal fish blood in the fields of fish condition and ichthyopatology. In the river Sava, 23 species and subspecies of fish were detected, dominated by Leuciscus cephalus and Cobitis spp. The ichthyomass varied a lot. Bentic biomass was dominated by amphipods, with higher sporadic development of gastropods and larval Trichoptera. Statistically significant negative correlations (p<0.05) were determined between the quantity of Hirudinea and several other groups of invertebrates. The growth of common carp in Vransko lake and the influence of the introduced freshwater fish on lake zooplankton were also studied. The work, started on fish genetics, gave the base for the future investigations in the fields of quantitative genetics and cytogenetics.

Keywords: freshwater fishery, culture, open water, ecology, cyprinids, haematology, physiology, fish genetics

Research goals: The main goal of these investigations is to acquire new knoweledge in imporoving fish culture and protection. The follwing problems will be examined: -Ecoligal investigations (hydrochemical and hydrobiological) on different techologies in fish culture and endangered waters. The influence of some chemical parameters on fisheries, the role of biological productivity in fish production and ecological changes. -The problems of fish nutrition in different technologies. Achieving better additional feed, wich can ensure better physiological use, better mass increments and survival (fingerlings in particular) and the reduction of feed coefficients. -Determination of hematological and biochemical indicators on orfder to diagnose fish condition and health, in connection with different abiotic, biotic and nutrition conditions. -Determination of present state of ichthyofauna and fisheries in the open waters. The obtained results will enable the dermination of ecological and production standards of water quality in fisheries. The complete feeds will be improved, together with the physiological condition and health state of fish. The natural food can be better used. These improvements can reduce the losses and stabilize production on fish-farms, as well as protect fish communities in the open waters.


COOPERATION - PROJECTS


  1. Name of project: Tehnološka i genetska istraživanja u ribarstvu
    Name of institution: Pliva
    City: 10000 - Zagreb, Croatia

  2. Name of project: Induced spawning and hybridization of black carp
    Name of institution: Wuhan University, Biology Department
    City: Wuhan, Kina

  3. Name of project: The introduction of pike-perch (Stizostedion lucioperca) and European catfish (Silurus glanis) to China
    Name of institution: Institute of Reservoir Fisheries, Water-Resources Ministry of P.R. China and Chinese Academy of Sciences
    City: Wuhan, Kina

  4. Name of project: Genetic manipulation and feeding of European catfish (Silurus glanis)
    Name of institution: University of Kerala, Department of Aquatic Biology and Fisheris
    City: Trivandrum, Indija


COOPERATION - INSTITUTIONS


  1. Name of institution: CENMAR
    Type of institution: Economical/Production
    Type of cooperation: Occasional exchange of information
    City: 23000 - Zadar, Croatia

  2. Name of institution: Jadran-Ribolovno
    Type of institution: Economical/Production
    Type of cooperation: Systematic exchange of information
    City: Solin, HR

  3. Name of institution: Ribarski centar
    Type of institution: Institution whose primary activities ar
    Type of cooperation: Joint project
    City: 10000 - Zagreb, Croatia

  4. Name of institution: Ribnjačarstvo Donji Miholjac
    Type of institution: Economical/Production
    Type of cooperation: Joint project
    City: Donji Miholjac, HR

  5. Name of institution: Ribnjačarstvo Končanica
    Type of institution: Economical/Production
    Type of cooperation: Joint project
    City: Končanica, Hrvatska

  6. Name of institution: Ribnjačarstvo Čazma
    Type of institution: Economical/Production
    Type of cooperation: Joint project
    City: Čazma, Hrvatska

  7. Name of institution: Pliva
    Type of institution: State institute
    Type of cooperation: Joint project
    City: Kalinovica, Hrvatska

  8. Name of institution: BADEL
    Type of institution: State institute
    Type of cooperation: Occasional exchange of information
    City: 10000 - Zagreb, Croatia

  9. Name of institution: Carpeix Pollenca
    Type of institution: State institute
    Type of cooperation: Occasional exchange of information
    City: Palma de Mallorca, Španjolska

  10. Name of institution: Chinese Academy of Sciences
    Type of institution: University/Faculty
    Type of cooperation: Joint project
    City: Wuhan, Kina

  11. Name of institution: Wuhan University, Biology dept.
    Type of institution: University/Faculty
    Type of cooperation: Joint project
    City: Wuhan, Kina

  12. Name of institution: Ministry of Agriculture and Agrarian Reform
    Type of institution: Institution whose primary activities ar
    Type of cooperation: Occasional exchange of information
    City: Damascus, Sirija

  13. Name of institution: Gulf Coast Research Laboratory
    Type of institution: University/Faculty
    Type of cooperation: Occasional exchange of information
    City: Ocean Springs, SAD

  14. Name of institution: University of Kerala, Dept. of Aquatic Biology and Fisheries
    Type of institution: University/Faculty
    Type of cooperation: Joint project
    City: Trivandrum, Indija

  15. Name of institution: Institut Jožef Stefan, Oddelek za nuklearno kemijo
    Type of institution: University/Faculty
    Type of cooperation: Systematic exchange of information
    City: Ljubljana, Slovenija

  16. Name of institution: Biotehniška fakulteta, Oddelek za zootehniko
    Type of institution: University/Faculty
    Type of cooperation: Systematic exchange of information
    City: Ljubljana, Slovenija

  17. Name of institution: Auburn University
    Type of institution: University/Faculty
    Type of cooperation: Occasional exchange of information
    City: Auburn, Alabama, SAD

  18. Name of institution: Research Institute of Fisheries and Hydrobiology
    Type of institution: University/Faculty
    Type of cooperation: Systematic exchange of experts
    City: Vodnany, Češka

  19. Name of institution: Faculty of Agriculture, University of Brno
    Type of institution: University/Faculty
    Type of cooperation: Systematic exchange of experts
    City: Brno, Češka

  20. Name of institution: Ribnjačarstvo Jelas
    Type of institution: Economical/Production
    Type of cooperation: Joint project
    City: 35000 - Slavonski Brod, Croatia

  21. Name of institution: FAO - European Fisheries Advisory Commission
    Type of institution: State administration
    Type of cooperation: Systematic exchange of information
    City: Rim, Italija

  22. Name of institution: Journal of Applied Aquaculture
    Type of institution: Non-profit
    Type of cooperation: Systematic exchange of information
    City: Binghampton, New York, SAD

  23. Name of institution: Ribarstvo
    Type of institution: Non-profit
    Type of cooperation: Systematic exchange of information
    City: 10000 - Zagreb, Croatia

  24. Name of institution: European Aquaculture Society
    Type of institution: Non-profit
    Type of cooperation: Systematic exchange of information
    City: Gent, Belgija

  25. Name of institution: Poljoprivredni fakultet
    Type of institution: University/Faculty
    Type of cooperation: Joint publishing of scientific papers
    City: 31000 - Osijek, Croatia

  26. Name of institution: Arab Aquaculture Consultants Office
    Type of institution: International organization
    Type of cooperation: Occasional exchange of information
    City: Giza, Egipat

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Last update: 10/07/95
Information: svibor@znanost.hr