FI:DP/YUG/83/011 Field Document 1 November 1984

by
D. Edwards
Consultant

This report was prepared during the course of the project identified on the title page. The conclusions and recommendations given in the report are those considered appropriate at the time of its preparation. They may be modified in the light of further knowledge gained at subsequent stages of the project.

The designations employed and the presentation of the material in this document do not imply the expression of any opinion whatsoever on the part of the United Nations or the Food and Agriculture Organization of the United Nations concerning the legal or constitutional status of any country, territory or sea area, or concerning the delimitation of frontiers.

FOOD AND AGRICULTURE ORGANIZATION OF THE UNITED NATIONS
Rome 1984

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TABLE OF CONTENTS

1. INTRODUCTION

1.1 Terms of Reference

1.2 Background Information

2. REVIEW OF EXPERIMENTS ON BRACKISH/SEAWATER CAGE CULTURE OF SALMONIDS IN YUGOSLAVIA

2.1 Organization

2.2 Schedule of Experiments Performed to Date

2.2.1 Rainbow trout

2.2.2 Coho salmon

2.3 Plans for Future Work and Private Involvement

2.3.1 Rainbow trout

2.3.2 Coho salmon

3. RECONNAISSANCE OF SUITABLE SITES FOR MARINE/BRACKISHWATER SALMONID CULTURE IN YUGOSLAVIA

4. SEA BASS/SEA BREAM CULTURE

4.1 CENMAR

4.1.1 Hatchery

4.1.2 Sea unit

4.2 R.O. MIRNA

5. OVERVIEW OF MARINE/BRACKISHWATER FINFISH CULTURE IN YUGOSLAVIA

6. COMMENTS ON UNDP PROJECT DOCUMENTS YUG/83/003 AND YUG/83/001/A WITH AUTHOR'S RECOMMENDATIONS

6.1 Expenditure on Equipment

6.2 FAO Consultants

6.3 “Training” Visits Overseas by Yugoslav Staff

7. CONCLUSIONS

LIST OF TABLES

1. Mean monthly temperature at different depths at three sampling sites in the River Krka estuary during 1981 and 1982

2. Monthly average salinity at different depths at three sampling sites in the River Krka estuary during 1981 and 1982

3. Physico-chemical characteristics of water at Skradin (River Krka estuary) during 1982

4. Physico-chemical characteristics of water at Skradin (River Krka estuary) during 1983

5. Mean monthly temperatures (°C) at different depths at St. Nikola in the Krka estuary during 1982 and 1983

6. Monthly average salinity (‰) at different depths at St. Nikola in the River Krka estuary during 1982 and 1983

7. Qualitative structure of phytoplankton populations in the water at Skradin (River Krka estuary) from January to December 1983

8. Growth of rainbow trout (experimental group 5) in brackish water at Skradin (River Krka estuary) over a 5-month period

9. Growth of rainbow trout (experimental group 1) in brackish water at Skradin (River Krka estuary) through 8 and 14 months during 1982–83

10. Growth of rainbow trout (experimental group 2) in brackish water at Skradin (River Krka estuary) through 8 months during 1982–83

11. Growth of rainbow trout (experimental group 3) in brackish water at Skradin (River Krka estuary) through 8 months during 1982–83

12. Growth of rainbow trout (experimental group 4) in brackish water at Skradin (River Krka estuary) through 8 and 14 months during 1982–83

13. Growth of rainbow trout from eyed eggs until 5 months-old-fry in fresh water at Gracanski hatchery during 1983

14. Growth of rainbow trout from 5 months until 1 year old at Novo Mesto fish farm during 1983

15. Growth of rainbow trout in brackish water at Skradin (River Krka estuary) during 1983–84

16. Growth of rainbow trout stocked in floating cages at different densities in brackish water at Skradin

17. Average chemical composition of meat of rainbow trout produced a) in brackish water at Skradin (Krka estuary), b) in fresh water (at Dvor Pri Zuzenbergu)

18. Growth of coho salmon from eyed eggs to 8 months of age at Gracanski hatchery (generation 1982)

19. Growth of coho salmon in fresh water at Dvor Pri Zuzenbergu fish farm from 26 November 1982 to 29 November 1983 (generation 1982)

20. Growth of coho salmon in fresh water at Gracanski hatchery from 26 November 1982 to 25 September 1983 (generation 1982)

21. Growth of coho salmon in brackish water at Skradin (Krka estuary) after transportation from Gracanski hatchery (generation 1982)

22. Growth of coho salmon in brackish water at Skradin (Krka estuary) after transportation from Dvor Pri Zuzenbergu fish farm (generation 1982)

23. Growth of coho salmon from eggs to 6 months of age at Gracanski hatchery (generation 1983)

24. Growth of coho salmon parr from 6 to 12 months of age at Novo Mesto hatchery (generation 1983)

25. Physico-chemical characteristics of water in Crikvenice Bay during 1983

LIST OF FIGURES

1. Map of the River Krka estuary, showing water depths, siting of experimental rainbow trout and coho salmon farms and sampling stations for physico-chemical parameters of the water

2. Temperature of water at different depths at the experimental cage site at Skradin (Krka estuary) during 1983

3. Salinity of water at different depths at the experimental cage site at Skradin (Krka estuary) during 1983

4. Oxygen content of water at different depths at the experimental cage site at Skradin (Krka estuary) during 1983

5. Growth of rainbow trout in fresh water and in brackish water following transfer of different size-groups of fish to floating cages

6. Growth of rainbow trout, of different mean weights at stocking, in cages in brackish water at Skradin (Krka estuary)

7. Comparative growth of rainbow trout (experimental group 1) in brackish and fresh water over a 14-month period

8. Comparative growth of rainbow trout (experimental group 4) in brackish and fresh water over a 14-months period

9. Growth of rainbow trout from eyed eggs to 1 year old in fresh and brackish water

10. Map of the Yugoslav coast from the Italian border to Zadar, showing water depths, positions of operating marine fish farms, and areas of special interest for brackish water salmonid culture in cages

11. Map of the Yugoslav coast from Zadar to Ston, showing water depths, positions of operating marine fish farms, and areas of special interest for brackish water salmonid culture in cages

12. Map of the Yugoslav coast from Ston to the Albanian border, showing water depths, positions of operating marine fish farms, and areas of special interest for brackish water salmonid farming in cages