水産養殖研究開発ジャーナル

概要

Perfect Stocking Density Ensures Best Production and Economic Returns in Floating Cage Aquaculture System

Farhaduzzaman AM, Md. Abu Hanif, Md. Suzan Khan, Mahadi Hasan Osman, Md. Neamul Hasan Shovon, Md. Khalilur Rahman, Shahida Binte Ahmed

A density dependent research was conducted on Oreochromis niloticus to determine the growth performance, body composition, survivability, yield and financial returns in floating cage fish culture system in a tributary of Tetulia River, Bhola. Juvenile monosex tilapia with an average weight of 40.2 g were stocked in 5 floating net cages at a density of 1000 (C1), 1200 (C2), 1500 (C3), 1800 (C4) and 2000 (C5) respectively. Fish were fed with a commercial floating feed twice daily in all the treatments. After 120 days, growth in terms of body final length and weight, weight gain, percent weight gain, specific growth rate, daily weight gain, gross and net production of fish were calculated and found C3 were comparatively higher than others. Survival rate was decreased with increasing stocking density. According to cost benefit analysis (CBA), stocking density 1200 per cage was the most suitable but it should not rise more than 1500 per cage for commercial monosex tilapia culture in cage aquaculture system.