Foraging And Bio-Indices Of Labeo Calbasu (Hamilton, 1822) From Wetlands Of South 24 Parganas District Of West Bengal

By : E. Vahneichong , Sudhir Kumar Das , Dibakar Bhakta

Page No: 353-360

Abstract
An investigation was made on food and feeding as well as some bio-indices like relative length of gut (RLG), Gastro-somatic index (GaSI) and Gonado-somatic index (GSI) in 275 samples of Labeo calbasu (total length 130 to 430 mm) occurring in wetlands of South 24 Parganas district of West Bengal for a period of nine months. The food items observed in gut contents constituted decayed organic matter, diatoms, mud and sand, algal matter, zooplankton and broken shells. The relative length of gut varied from 5.68 to 14.70 and it was significantly different between two size groups. The mean GaSI of male fish varied from 1.64 to 4.11 and that of female from 1.62 to 3.96. The mean GSI value ranged from 0.54 to 3.30 for male and 0.56 to 9.65 for female and it was significantly different in different months and sex

Authors :
E. Vahneichong, Sudhir Kumar Das and Dibakar Bhakta
Department of Fisheries Resource Management, Faculty of Fishery Sciences, West Bengal University of Animal and Fishery Sciences, Chakgaria, Kolkata- 700 094, West Bengal, India.