Diurnal variation of zooplankton off Versova (Bombay)

S.N. Gajbhiye, V.R. Nair, B.N. Desai


Physicochemical parameters and diurnal variaion of zooplankton were studied off Versova on 17/18 February 1981. Salinity and dissolved oxygen showed limited variation during the period of study. Nutrient values followed the tidal rhythm and high values were always associated with ebb tide. Zooplankton biomass varied from 1.20-12.13 ml/100 m3 (av. 4.71 ml/100 m3) with higher population during night than day collection. Relatively higher values of zooplankton biomass and population were associated with flood to ebb tide. Day/night variation observed in the incidence of some species of zooplankton are discussed in detail


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