Evaluation of Different Stocking Densities for Hybrid Striped Bass in Small-Scale Recirculation Systems

Abstract

Abstract The maximum density of fish that can be grown in an aquacultural system is an important factor determining the economic feasibility of individual operations. We conducted two separate studies with reciprocal-cross hybrid striped bass (striped bass Morone saxatilis × white bass M. chrysops) reared in a recirculating-water system. Densities initially established in the first experiment were 0.8, 1.4, 1.5, 1.9, 2.3, and 2.7 kg/m3. At the end of 70 d, weight gain, feed efficiency, survival, and dress-out were not significantly different among density groups. Standing crop increased significantly as stocking density increased; the highest density obtained was 28 kg/m3. In the second experiment, initial densities of 2.5, 5.0, 7.5, 10.0, 12.5, and 15.0 kg/m3 were established. After 86 d, mean weight gain, feed efficiency, and dress-out were not significantly different. Standing crop increased significantly with increasing density; the highest mean value was 55.5 kg/m3. Ash concentrations in the muscle o...