Growth performance of amur common carp under polyculture with Indian major carps in village tanks of Vijayapur district, Karnataka

Abstract

The present study was conducted to evaluate the growth performance of Amur common carp under polyculture with Indian major carps (Catla and Rohu). For this study two village tanks viz., Mulwad and Karjol of Vijayapur district were selected. Fingerlings of uniform size were selected and stocked at the rate of 1 No/m2 and the fishes were fed with floating carps feed @ 1% of fish body weight. Among different species stocked, Amur common carp had shown the highest growth in terms of gain in weight and length (1579.9g and 32.1cm respectively) followed Catla (1050g and 30.0cm respectively) and Rohu (729.3g and 30.1cm respectively) in Mulwad village tank. Similarly in Karjol Village tank, Amur common carp had shown the maximum growth in terms of gain in weight and length (1388.8g and 31.2cm respectively) followed Catla (978.8g and 27.8cm respectively) and Rohu (649g and 30.1cm respectively). The specific growth rate of Amur common carp was also highest both in Mulwad (2.42%) and (2.35%) Karjol Village tank followed by Catla and Rohu. Amur common carp exhibited a better growth compared to other species (Catla and Rohu) in village tanks, which may be due to the omnivorous feeding habit and resistance to fluctuation in water quality. It could be inferred from this study that Amur common carp is most suitable species for polyculture with Catla and Rohu in water bodies like village tanks.