Zooplankton of the retting zones in the Kadinam-Kulam Estuary, Kerala

S.B. Nandan, P.K.A. Azis


Retting of coconut husk in the estuarine system of Kerala has been a major source of pollution resulting in large scale depletion of estuarine fisheries. The composition, occurrence, distribution and diversity of zooplankton at two retting and nonretting zones of the Kadinamkulam Estuary were studied. The zooplankton groups/species were greatly depleted at the retting zones. Rotifera, Copepods and copepod nauplii were the major groups present at all stations. Brachionus sp., Acartia tropica, copepod nauplii, Chironomus calligaster and Pentaneura sp. were identified as indicators of sulphide pollution


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