Saraswat Sahoo

Biology of Mahanadi Mahseer, Tor mosal Mahanadicus (David) Reared in Freshwater Pond Culture System

Introduction The mighty mahseers (Tor spp) are cold water fishes and acclaimed as famous sport and food fishes of India1. It is known as tiger in rivers, because of the fight it musters to wriggle off the hook during catch. In the past, mahseer formed a substantial natural fishery in the major riverine and lacustrine ecosystems of India2. For the fishermen, mahseer is of considerable importance due to its large size. As an edible fish, it is highly esteemed and fetches abstract This paper is about the study on biology of Mahanadi Mahseer, Tor mosal mahanadicus (David) reared with Indian Major Carps (IMC) in Freshwater Pond Culture System conducted at ICAR-Central Institute of Freshwater Aquaculture, Bhubaneswar. The study focused on biological parameters, i.e., food and feeding habits; maturity; and length and weight relationship of Mahanadi mahseer, Tor mosal mahanadicus, a fish species under endangered group reared with IMCs such as Catla catla (Catla), Labeo rohita (Rohu) and Cirrhinus mrigala (Mrigal) in pond culture system. The fish was found to be omnivore and benthic feeder, and was acclimatized to pond culture condition and reared with supplementary feed such as rice bran and ground nut oil cake. In two years of pond rearing, male fish attended maturity and milting was recorded at an average size of 228 ± 11.36 mm length and 110 ± 6.61 g weight. Female fish attained early vitellogenic stage having primary vitellogenic oocytes in their ovaries at an average fish size of 287 ± 31.0 mm length and 224 ± 15.6 g weight. Length weight relationship of the fish in pond culture system reared from fry stage to adults was W= 0.0001339 L 2.4301 or log W = -3.8733 + 2.4301 log L and from fingerling stage to adults was W= 0.0000633 L 2.5920 or log W = -4.1986 + 2.5920 log L. article history

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