Mangrove swamps as fry source for shrimp culture - A case study

C.T. Achuthankutty, S.R.S. Nair


Three species of commercially important penaeid prawns, viz. Metapenaeus dobsoni, M. monoceros and Penaeus merguiensis occur in the Pilerne mangrove swamp of Goa. M. dobsoni was the dominant species contributing 42.66% followed by M. manoceros (35.02%) and P. merguiensis (22.32%). Premonsoon season (February-May) sustained their maximum abundance in this mangrove. Juveniles (10-30 mm) constituted the largest portion of the penaeid population. M. dobsoni grows to 50-60 mm length within 5-6 months and M. monoceros attains a length of 70-80 mm in 7-8 months. P. merguiensis stays in this environment for 6-7 months and reaches a length of 80-90 mm. Maximum abundance of juveniles occurs from December to June which would be the most appropriate time for a large scale collection


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