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Comparative account on zooplankton in polluted and unpolluted estuaries of Gujarat

DRS at CSIR-National Institute of Oceanography

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Title Comparative account on zooplankton in polluted and unpolluted estuaries of Gujarat
 
Creator Desai, B.N.
Gajbhiye, S.N.
JiyalalRam, M.J.
Nair, V.R.
 
Subject Aquatic Communities
Aquatic Pollution
zooplankton
biomass
check lists
community composition
dominant species
brackishwater pollution
comparative studies
seasonal distribution
seasonal variations
ISW, India, Gujarat
 
Description An assessment of the zooplankton biomass and composition in Kolak Par, Damanganga and Auranga estuaries was made. Among these four rivers pollution is severe in the first two, moderate in Damanganga and good water quality prevailed in Auranga. The extent of variability in the distribution of zooplankton was in accordance with the intensity of pollution. In the unpolluted estuary zooplankton biomass varied from 1.8 to 10.06 ml/100 m@u3@@ and mean secondary production amounted to 80 mg C/100 m@u3@@/day. The intensely polluted estuaries are characterised by wide fluctuations in zooplankton biomass during the ebb and flood periods. The flood conditions sustained 1.8 to 4.4 times higher biomass than the ebb conditions. Mean rates of secondary production in these estuaries were 138 mg C/100 m@u3@@ /day (Par) and 265 mg C/100 m@u3@@ / day (Kolak). In the moderately polluted estuary the rate of secondary production was 109 mg C/100 m@u3@@ /day. Dominance of zooplankton groups varied with level of pollution in the unpolluted estuary invariably copepods were predominant. In the polluted estuaries during ebb tide gastropods, mysids and polychaetes formed the major part of the zooplankton. Diversity of different groups of zooplankton was relatively low in polluted estuaries
 
Date 1995-05-11T10:00:56Z
2017-09-29T13:48:35Z
1995-05-11T10:00:56Z
2017-09-29T13:48:35Z
1983
 
Type Journal Article
 
Identifier Mahasagar, vol.16(3); 1983; 281-291
0542-0938
http://drs.nio.org/drs/handle/2264/6512
 
Language en
 
Relation Mahasagar
NON-SCI
 
Publisher Indian Association for Limnology and Oceanography