Description

Abstract: Shrimp were grown under ideal management conditions during two distinct seasons of the year at stocking densities used most often in Honduras with the Objectives of evaluating the usefulness of high protein diets. A randomized design in 2 x 2 factorial arrangement was used to test a diet composed of either 20 or 40% crude protein in earthen ponds that were stocked with juvenile Penaeus vannamei at 5 to 11/m2. The study was repeated during wet and dry seasons. Dietary protein level had no significant effect (P>0.05) on survival, yield, or average weight of shrimp at either density during both seasons. Mean shrimp weight in high density ponds was significantly lower than mean shrimp weight in low density ponds during the wet season, but there was no significant weight difference because of stocking rate during the dry season. Mean survival was significantly lower at the higher stocking rate during the dry season. Net income was negative during the dry season, particularly at the high stocking density. Mean production was 240% greater in the wet season than the dry season. Diets offered P. vannamei stocked at 5 to 11/m2 should contain no more than 20% protein, regardless of season. Higher dietary protein levels increase cost and waste nitrogen resulting in greater shrimp yields. The high stocking density might increase profitability in the wet season, but long term sustainable production may be more feasible at lower stocking creates because of reduced nutrient wastes.