Comparative Growth of Different Catfish and Carps under Sewage Treated Water

Abstract

Achieving an environmentally stable and sustainable future of fisheries sector requires the conservation of natural resources and biodiversity. Based on growth parameters, suitability of sewage treated water for different catfish and carps were determined. Four different type of fish species; advance fingerlings of , , fry of and fingerlings of Pangasius hypopthalamus Catla catla Cyprinus carpio haematopterus Clarias batrachus P. hypopthalamus C. batrachus were cultured in sewage treated water and freshwater. The weight of catfishes ( and ) reared in sewage treated water showed significant increment from 3.64 g and 1.86 g to 9.71 g and 6.21 g within 30 days of experimental period. Similarly, length of fish increased from 8.17 cm and 6.46 cm to 11.85 cm and 8.71 cm. Sewage treated water provides essential nutrients, organic matter, microorganisms that assures the growth of living and non-living food organism for better growth and survival of aquatic animals under aquatic environment, even in the absence of supplementary feeding. However, carps ( and ) were not C. carpio haematopterus C. catla able to grow well in the sewage treated water under in vitro conditions. The weight and length of both the fishes declined within 30 days. Additionally, the fry of released in sewage treated water was not able to survive in spite of feeding as the mortality C. carpio haematopterus (50%) recorded at 15 day increased to 100 % at 30 day. The growth (weight, length) of catfishes showed significant positive correlation with th th various water quality parameters as compared to that of the carps.