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Effect of Contrasting Agents on Survival, Performance, and Condition of Larval Hybrid Striped Bass Morone chrysops x M. saxatilis in Tanks

Matthew McEntire, Marty Riche, Benjamin H. Beck, Doug Carter
Journal of applied aquaculture 2015 v.27 no.1 pp. 1-28
cannibalism, hybrids, diet, turbidity, weaning, soil, particle size, kaolin, fish, tanks, larvae, Morone chrysops x Morone saxatilis
Contrasting agents, either algae or inert soil, cause turbidity, which is important in the tank culture of larval cannibalistic fish. Optimization of turbidity is critical to successful tank culture of new larval fish, which should include 100 mg/L of sub-5 μ m particle size in the assessed range. The optimum tested range of greenwater culture for hybrid striped bass using algae paste once daily was between 629 and 1127 mg/m ³ (350–583 cell/mL). Dispersed kaolin worked as well as greenwater culture. Using contrasting agents improved fish length, condition, tail–length ratio (TLR), and uniformity of the fish at the time of weaning onto prepared diets. Increasing turbidity appears to negatively skew fish length and TLR. TLR shows promise as an early indicator of cannibalism. Increasing turbidity appears to decrease the size advantage of the largest fish in the tank, which allows the smallest fish to catch up.