WORKING PAPERS - BOBP/WP/47
Growth And Mortality Of The Malaysian Cockle (Anadara Granosa L.) Under Commercial Culture: Analysis Through Length-Frequency Data
by
Ng Fong Oon
Fisheries Research Institute
Glugor - Penang, Malaysia
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WORKING PAPERS - BOBP/WP/47 Growth And Mortality Of The Malaysian Cockle (Anadara Granosa L.) Under Commercial Culture: Analysis Through Length-Frequency Databy |
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Executing Agency: FOOD AND AGRICULTURE ORGANIZATION OF THE UNITED NATIONS Funding Agency: SWEDISH INTERNATIONAL DEVELOPMENT AUTHORITY Development of Small-Scale Fisheries in the Bay of Bengal. Madras, India, July 1986 |
| The designations employed and the presentation of material in this publication do not imply the expression of any opinion whatsoever on the part of the Food and Agriculture Organization of the United Nations concerning the legal status of any country, territory, city or area or of its authorities, or concerning the delimitation of its frontiers or boundaries. |
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© FAO 2004
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This paper analyses length frequency data, by several methods, of the Malaysian cockle (Anadara granosa L). The data were collected monthly from five different plots under commercial culture during a period of 12-17 months. Parameters of the von Bertalanffy growth formula (VBGF) were derived for each of the five plots, along with estimates of related parameters (mortality, mean length of first capture, etc.). “Yield per recruit” analyses suggest that the present legal size for the five culture plots is well above the maximum yield per recruit. The paper discusses the limitations of the methodology and data used. Suggestions for further studies are also made. The cockle samples were collected and measured by staff of the cockle team, headed by the author, of the Glugor Fisheries Research Station (GFRI), Penang, Malaysia. The analyses were made by the author on a fellowship visit to the International Center for Living Aquatic Resources Management (ICLARM), Manila, in October 1985. The author wishes to thank the GFRI’s Director of Research, Mr. Mohd Shaari bin Sam Abdul Latiff, and Mr. Ong Kah Sin, Head of the Aquaculture Section, for their encouragement and suggestions on the project; Dr. Daniel Pauly (ICLARM), for his help with the analyses; Dr. J. Saeger and Mr. Gayanilo (GTZ) for allowing him to use their revised version of the ELEFAN programs and their computer facilities; Ms. Faazaz bte Latiff, Mr. Kamal Zaman bin Mohamad and Ms. Devaki Nair for collecting and compiling the length frequency data at Penang and Set an gor. The work described in this paper is one component of a programme for the Development and Management of Cockle Culture in Malaysia, supported by the smallscale fisheries project of the Bay of Bengal Programme (BOBP). The programme’s first phase, undertaken during 1985, consisted primarily of biological studies. Other components were experiments with induced spawning, determination of maturity and spawning pattern by means of condition indices, monitoring of culture plots, and examination of cockle shells to determine age and growth pattern. The next phase will consist of economic and socio-economic studies. |
PREFACE
1. INTRODUCTION
2. LOCATION OF THE CULTURE PLOTS
3. MATERIAL AND METHOD
4. RESULTS
5. DISCUSSION
6. REFERENCES
APPENDIX
1. Length frequency data of Anadara granosa from five culture plots
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