No abstract

No abstract

In recent years there has been increasing interest in the replacement of animal proteins with plant proteins in commercial feeds for the Pacific white shrimp, Litopenaeus vannamei . Both pond-and tank-based experiments were conducted to evaluate the potential of replacing poultry by-product meal (PBM) with a combination of soybean meal, corn gluten meal, and a low level of squid meal. For pond-based research, juvenile shrimp were stocked at 34 shrimp/m 2 and were cultured in 0.1 ha ponds under standardized production conditions. These four diets and a commercial reference diet were evaluated in an outdoor tank system stocked with 30 juvenile L. vannamei per tank. Culture water was pumped from a production pond to these tanks to mimic production pond conditions with a more uniform environment. Feed rates were predetermined by using a feed conversion ratio (FCR) of 1:1.2 and an average weekly growth of 1.5 g/wk. Final yields in the pond study averaged between 6093 and 6943 kg/ha. Average final weights varied between 22 and 24 g, survival varied between 78. 9 and 82.2%, and the FCR was 0.94-1.09. The 79-d tank culture produced average final weights between 19.9 and 20.5 g, survival varied between 94.2 and 96.7%, and the FCR was 1.10-1.18. There were no significant differences found between any of the PBM replacement diets in either the pond or tank study.

No abstract

No abstract

No abstract