Zooplankton studies in the Indian Ocean. 1. From Bay of Bengal during south-west monsoon period

V.R. Nair, G. Peter, V.T. Paulinose


Zooplankton abundance in the Bay of Bengal during the south-west monsoon period showed that areas close to the land are rich in zooplankton production. Biomass values were low for the northern most stations and gradually increased from north to south indicating the possibility of environmental factors influencing production in this area. Aggregates of different groups of zooplankton evidently contributed to higher biomass values towards the southern part. South-east coast was richest for decapod larvae, fish eggs and fish larvae. Decapod larvae were more abundant nearer to the coast and their density gradually decreased towards the open ocean. Zooplankton stratification in relation to thermocline suggested a preference for zooplankton to congregate above the discontinuity layer


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