Growth and Yield of Pink Shrimp (Penaeus duorarum duorarum) in Feeding Experiments in Concrete Tanks

Abstract

Abstract The paper gives results of two 63-day feeding experiments conducted with pink shrimp, Penaeus duorarum duorarum, in 36 concrete tanks, each 2 m2. Foods tested included a commercial catfish food, wheat bran, wheat straw, hay and bagasse. Postlarval shrimp 25 days old were stocked at densities of 7.5 and 15 per m2. Marl substrate vs. no substrate was also tested, in most cases, as was the effect of feeding rate. Average yield (g/m2) of shrimp was higher in tanks to which catfish food was added than in those to which wheat bran was added, it was higher at the lower stocking density, and it increased with increase in feeding rate. Average final weight per shrimp did not differ significantly between these two foods, thus the difference in yield was represented by greater survival of shrimp in tanks to which catfish food was added. Average final weight per shrimp was bigher at the lower stocking density. Marl substrate was associated with lowered mean dissolved oxygen concentration but also with higher...