Larval migration and growth of marine prawns in the estuarine habitat

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


Larval migration and growth of Metapenaeus dobsoni, M. monoceros, M. affinis and Penaeus merguiensis were studied in the Mandovi Estuary and a nearby mangrove swamps for one year. In general, total number of larvae were more during the post-monsoon season (56.3%). The lower reaches of the estuary sustained the maximum density (73.2%). All species except M. affinis had an initial growth in the mangrove swamp and a later stay in the estuary before finally migrating back to the sea. M. affinis , on the other hand, was observed to grow mostly in the estuary. The sizes at which such active emigration occurs varies with species and habitat


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