FIELD DOCUMENT
( DRAFT )       

INSTITUTIONAL STRENGTHENING IN THE FISHERIES SECTOR
BANGLADESH

MANUAL ON SEED PRODUCTION OF AFRICAN CATFISH (Clarias gariepinus) CONTENTS

Prepared
by

ANDRAS PETERI
SHIBABRATA NANDI
and
SAMARENDRA NATH CHOWDHURY

MINISTRY OF FISHERIES AND LIVESTOCK, DEPARTMENT OF FISHERIES
GOVERNMENT OF BANGLADESH

UNITED NATIONS DEVELOPMENT PROGRAMME

FOOD AND AGRICULTURE ORGANIZATION OF THE UNITED NATIONS

ACKNOWLEDGEMENTS

The authors wish to express their gratitude to Dr. P.C. Choudhury, C.T.A., Dr. N. Kutty, International Expert of FAO/UNDP Project BGD/87/045 for their advice and comments; to Mr. I. Csavas, Regional Aquaculture Officer of FAO, for providing literature and informations; to Mr. A.K.A. Rahman, Director of DoF, providing facilities in conducting field work; to Mr. M. Hassan, Mr. I. Murshed and Mr. M.N. Coudhury, Farm Managers for their generous help in the fish breeding and rearing. Special thanks are due to Prof. Abu Tweb A. Ahmed for designing and editing this manual.

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TABLE OF CONTENTS

   ACKNOWLEDGEMENTS

1 INTRODUCTION

2 BIOLOGICAL CHARACTERISTICS OF AFRICAN MAGUR

3 ROLE OF AFRICAN MAGUR IN POND FISH CULTURE

4 HYBRIDIZATION OF CLARIAS SPECIES

5 BIOLOGICAL BACKGROUND OF SEED PRODUCTION
5.1 Development of gonads
5.2 Embryonic and larval development

6 TECHNOLOGY OF SEED PRODUCTION
6.1 Broodfish management
6.1.1 Stocking
6.1.2 Feeding
6.1.3 Recruitment of broodfish
6.1.4 Management of broodfish populations
6.1.5 Culture of broodfish in cement tank
6.1.6 Selection of broodfish for spawning
6.2 Induced breeding of African magur
6.2.1 Hatchery for magur reproduction
6.2.1.1 Water quality requirement
6.2.1.2 Hatchery installation
6.2.1.3 Hatchery equipment
6.2.2 Hormonal treatment of female and male fish
6.2.3 Stripping, fertilization and incubation
6.3 Nursing and fingerling production
6.3.1 Nursing in fish ponds
6.3.1.1 Pre-stocking pond management
6.3.1.1.1 Dewatering, poisoning, treatment of pond soil
6.3.1.1.2 Liming
6.3.1.1.3 Refilling and manuring ponds
6.3.1.2 Post-stocking pond management
6.3.2 Combined method of African magur fry production
6.3.2.1 Stocking of troughs
6.3.2.2 Daily treatment of troughs
6.3.2.3 Feeding of magur fry
6.3.2.4 Preparation of pond for second phase of rearing
6.3.3 Nursing in hatcheries.
6.3.3.1 Nursing in incubation troughs
6.3.3.2 Nursing in cement tanks

9 ECONOMICS OF AFRICAN MAGUR FINGERLING PRODUCTION

REFERENCES

APPENDIX 1

APPENDIX 2

APPENDIX 3

APPENDIX 4

APPENDIX 5