LENGTH-WEIGHT RELATIONSHIP, RELATIVE CONDITION FACTOR, FOOD AND FEEDING HABITS OF CHANNA STRIATA FROM WETLANDS OF NADIA DISTRICT, WEST BENGAL
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Authors
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RUPALI CHAKRABORTY
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SUDHIR KUMAR DAS
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DIBAKAR BHAKTA
Abstract
Samples of 226 numbers of Channa striata were examined during October, 2003 to May, 2004 to find out length-weight relationships, relative condition factor and food and feeding habits. Total length of the fish sample ranged from 130-400 mm and weight 65-955 g. The species was categorized into two group's viz., Group I (< 200 mm) and Group II ( 200 mm) for convenience of interpretation. The length weight relationship was recorded as W = 0.0072 L3.104 for the Group I and W = 0.0068 L3.060 for Group II. The 'b' value was recorded as 3.104 and 3.060 for the Group I and Group II specimens respectively. The growth of the fish was found to be isometric because 'b' value was not significantly different (P<0.05) from 3. The relative condition factor (Kn) was ranged from 1.02 to 1.22. Significance difference (P<0.05) was found in Kn value during different months. Food and feeding habits revealed fishes were the principal food items followed by
insects and crustacean indicating Channa striata is a carnivore, predatory and bottom dwelling fish.
Key words : Length-weight relationships, condition factor, food and feeding habits, Channa striata, West Bengal.
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