Kentucky State University

Poster Title

Evaluation of Different Plant and Animal Source Proteins for Replacement of Fish Meal in Diets for the Largemouth Bass, Micropterus salmoides

Presenter Information

Russell Neal

Institution

Kentucky State University

Abstract

Two feeding trials were conducted with juvenile largemouth bass to evaluate alternative proteins to replace fish meal. The first trial identified promising candidates and the second trial determined the level of replacement possible. Juvenile largemouth bass were stocked into eighteen 113.6-l glass aquaria at 25 fish per aquarium and fed one of six diets (38% protein and 10% lipid). The control diet (CTL) contained 30% fish meal. Diets 2-6 contained 15% fish meal with the remainder of the protein from either meat or bone meal (MBM), soybean meal (SBM), poultry by-product meal (PBM), a mixture of blood meal and corn gluten meal (BM/CG), or a mixture of feather meal and soybean meal (FM/SBM). After 12 weeks, only fish fed the PBM and BM/CG diets had weights and feed conversion efficiencies not significantly different (P > 0.05) from the control diet. In Study 2, the CTL diet remained the same and PBM and BM/CG replaced 75 or 100% of the fish meal. After 11 weeks, fish fed diets containing BM/CG were significantly smaller. Fish fed diets with PBM replacing 100% of fish meal performed as well as those fed the control diet.

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Evaluation of Different Plant and Animal Source Proteins for Replacement of Fish Meal in Diets for the Largemouth Bass, Micropterus salmoides

Two feeding trials were conducted with juvenile largemouth bass to evaluate alternative proteins to replace fish meal. The first trial identified promising candidates and the second trial determined the level of replacement possible. Juvenile largemouth bass were stocked into eighteen 113.6-l glass aquaria at 25 fish per aquarium and fed one of six diets (38% protein and 10% lipid). The control diet (CTL) contained 30% fish meal. Diets 2-6 contained 15% fish meal with the remainder of the protein from either meat or bone meal (MBM), soybean meal (SBM), poultry by-product meal (PBM), a mixture of blood meal and corn gluten meal (BM/CG), or a mixture of feather meal and soybean meal (FM/SBM). After 12 weeks, only fish fed the PBM and BM/CG diets had weights and feed conversion efficiencies not significantly different (P > 0.05) from the control diet. In Study 2, the CTL diet remained the same and PBM and BM/CG replaced 75 or 100% of the fish meal. After 11 weeks, fish fed diets containing BM/CG were significantly smaller. Fish fed diets with PBM replacing 100% of fish meal performed as well as those fed the control diet.