The effect of stocking density on the growth and survival of Labeo chrysophekadion fish in the recirculating system using micro bubbles water

Abstract

This study was aimed to examine growth and survival of Labeo chrysophekadion (Bleeker, 1849) fish in the recirculating system using micro bubbles water. The experiment were assigned as four experimental groups using 20, 30, 40 and 50 fish m^-3 for group1, 2, 3 and 4, respectively with two replications in each group. The average initial body weights of fish were about 5 g fish^-1. Fish were reared in fish tank (3 m³) at Rajamangala University of Technology Lanna Nan during July – August, 2018. Fish were fed by 32% protein commercial diets at 3% gbw day^-1. At the end of culturing (80 days), 30 fish group^-1 were collected to examine growth and survival of fish. The results were evaluated of growth of fish demonstrated that fish of group1 were highest of average daily gain (75.05±30.36 gfish^-1), percentage of weight gain (1364.55±603.20 %day^-1) and specific growth rate (0.75±0.29 g/fish/day) followed by fish in group 4, 3 and 2, respectively. While they were not significantly different in survival of fish as well as three water quality parameters were not significantly different (p>0.05) in each experimental group.