Growth And Mortality Of The Malaysian Cockle (Anadara Granosa L.) Under Commercial Culture: Analysis Through Length-Frequency Data - BOBP/WP/47
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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 p lots 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 co mpiling 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.