The length-weight relationship, food habits and condition factor of wild juvenile milkfish in Sri Lanka
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Wild juvenile milkfish (Chanos chanos) were obtained from Negombo lagoon in September 1984. Thirty-one specimens (92–186 mm FL) had a fork length-body weight relationship of log W = −5.6083 + 3.2598 log L. These fish were caught in the early morning and had empty guts. The mean condition factor (K) was 8.7. The intestine length to fork length ratio (I) was 3.7. Two large specimens (245 mm and 340 mm FL) caught around mid-day from the ocean off Negombo had full guts. Food was mostly blue-green algae, diatoms and detritus, with a number of copepods and nematodes. These fish had K values of 11.7 and 13.6 and I values of 8.1 and 8.5. The age and the month of spawning of these fish were back-calculated using known milkfish growth rates. It seems that in Sri Lanka, milkfish spawn from January to at least November.
Contribution No. 174 of the SEAFDEC Aquaculture Department.
Suggested CitationBagarinao, T., & Thayaparan, K. (1986). The length-weight relationship, food habits and condition factor of wild juvenile milkfish in Sri Lanka.
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Thayaparan, K.; Chakrabarty, R. Debidas (Aquaculture Department, Southeast Asian Fisheries Development Center; International Development Research Centre; Island Publishing House, Inc., 1984)Milkfish (Chanos chanos ) fry and fingerlings are abundant in coastal and brackishwater areas in Sri Lanka, yet the industry remains in a stage of underdevelopment. The main seed collection centers are Mannar and Kalpitiya ...
Baliao, Dan D. (Ministry of Fisheries and Aquatic Resources, 1982)The author reviews the present methods of milkfish (Chanos chanos) fry collection and presents his observations and recommendations of improvement.
Bagarinao, Teodora (Ministry of Fisheries and Aquatic Resources, Sri Lanka, 1986)A summary is provided of information concerning the milkfish (Chanos chanos) seed resources of Sri Lanka, highlighting problems related to seed collection. Various recommendations are made to overcome these problems and ...