DDT induced ethological changes in estuarine fish |
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Authors: | T Lingaraja P Sasi Bhushana Rao V K Venugopalan |
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Institution: | (1) Centre of Advanced Study and Research in Marine Biology, Annamalai University, Porto Novo, S. India, 608 502 |
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Abstract: | Synopsis Experiments were carried out to study the feeding rates of the predator fish Therapon jarbua (Forsk) on mullet juveniles, before and after treatment with DDT. Mullet juveniles treated with a subacute concentration, were refused by the control predators, whereas predators treated with a subacute concentration consumed more mullet juveniles. In the present study crescent perch T. jarbua were exposed to subacute and acute concentrations of DDT, and their behaviour was compared with that of the control predators. There were changes in oriented behaviour and co-ordinated movements, and in feeding, aggression and comfort behaviour of the fish. Inflammation in the gills, and caudal fin serration, were noticed in treated fishes. The findings presented here throw light on fundamental pathways by which pollutants interact with the behaviour of fishes. |
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Keywords: | Teleost Behaviour Acute and subacute toxicity Morphological toxicosis Therapon jarbua Mullet juveniles |
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