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Effect of feed quality on growth of the Gulf of Mexico white shrimp, Penaeus setiferus, in pond pens

Effect of feed quality on growth of the Gulf of Mexico white shrimp, Penaeus setiferus, in pond pens

Texas Journal of Science 45(1): 69-76

To evaluate the effect of feed quality on growth and survival of Penaeus setiferus in an intensive culture system, a trial was conducted using commercially manufactured feeds varying in total protein and squid meal content. Juveniles (3.6 grams initial weight) were stocked at 40 per square meter in bottomless pens of one cubic meter in an earthen pond and were fed different quality feeds for 56 days. The effect of feed quality on instantaneous growth rate of P. setiferus was significant (P = 0.0001). Shrimp fed high quality feed (50 percent protein-15 percent squid meal) grew faster than those fed medium (40 percent protein-five percent squid meal) and low (30 percent protein only) quality feed, and shrimp fed medium quality feed grew faster than those fed low quality feed. Survival was not affected by fed quality (P = 0.8715) and averaged 90.3 percent. Weekly growth, final weight, and harvest biomass of fed shrimp ranged from 0.93 to 1.04 grams per week, 11.0 to 11.9 grams, and 398 to 421 grams per square meter, respectively. Unfed shrimp at the same density grew 0.47 grams per week, had 95 percent survival and were harvested at a final weight of 7.3 grams and biomass of 279 grams per square meter. It was estimated that natural forage contributed ltoreq 52 percent to shrimp growth. Unfed shrimp stocked outside the pens in the open pond at a density of 0.5 per square meter grew 1.56 grams per week, had 92.3 percent survival, and were harvested at weight of 16.1 grams and biomass of eight grams per square meter. Results showed that P. setiferus has the potential to grow at commercially acceptable rates and indicated that quality of presented feed was important for growth of the species under intensive culture conditions even when natural foods were available.

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