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Food and feeding habit and length-weight relationship of the Asian striped catfish Mystus vittatus

Home Forums Ichthyology Food and feeding habit and length-weight relationship of the Asian striped catfish Mystus vittatus

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    Matt
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    Open access in Indian Journal of Science

    Abstract

    This study aimed to provide information on the food and feeding habit and length-weight relationship of freshwater catfish Mystus
    vittatus (Bloch, 1794) based on 360 specimens (Juveniles 41, males 138 and females 181) collected from the Vadavar river, Lower
    Anicut, Tamil Nadu during the period between December 2009 to November 2010. M.vittatus is one of the commercially important
    catfishes and is also mainly a carnivorous fish. Its food consists mainly of fishes, insects, green algae, blue green algae, diatoms and crustaceans were reported throughout the study period. Monthly variations in the percentage composition of the food items were noticed. No variation of food items between the juvenile and adult specimens. Length-weight relationship of M.vittatus ranging
    from 85-205 mm in total length and 6.0-76.5 g in total weight. Length-weight regression equations were derived for juvenile, male
    and female specimens in order to find out the regression parameters and growth pattern. LWR in juveniles, males and females are
    Log W – 1.457+2.366 Log L; Log W= -1.428+2.405 Log L; Log W=-1.987+2.873 Log L respectively. Where as in pooled sexes Log W =-1.816+2.732 Log L. Correlation coefficient values ranging from 0.728-0.851 and regression coefficient were 0.531-0.725. Mean condition factor (K) ranged from 0.4±1.6. The ‘b’ values indicate the growth patterns of M.vittatus were found to be negative allometric.

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