Distribution of Copepods from the Polluted and Unpolluted Regions off Bombay

Abstract

Distribution and abundance of copepods in the nearshore waters off Bombay were studied at 4 fixed sampling sites during October 1977 to December 1978.The stations Mahim and Thana received domestic and industrial waste while the stations of Versova and Harbour were relatively free from major waste discharge. Maximum population density of copepods (av. 5360/m3) was observed at Mahim, which was about twice than at other stations. Major peaks were noticed in October/November and March/April. Of the 21 genera of copepods recorded, Paracalanus, Acrocalanus, Acartia, and Oithona were the most common. The polluted regions of Mahim and Thana creek were characterised by the dominance of Paracalanus, Oithona and Acartia. The generic diversity of copepods was greater in unpolluted area.