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<p>This study evaluated the nutritional value of duck meal as a sustainable alternative to fish meal in diets for white shrimp, <i>Penaeus vannamei</i>. The proximate, amino acid, and fatty acid compositions of duck meal were analyzed and compared with those of fish meal. A 56-day feeding trial was conducted to investigate the effects of replacing dietary fish meal with duck meal on the growth performance, feed utilization, apparent nutrient digestibility, whole-body composition, and resistance to <i>Vibrio alginolyticus</i> infection in white shrimp. Five experimental diets were formulated in which duck meal replaced 0%, 20%, 40%, 60%, and 80% of the dietary fish meal, respectively. The basal diet contained 330.9&#xa0;g fish meal/kg diet, corresponding to duck meal inclusion levels of 0, 86.5, 173.1, 259.6, and 346.2&#xa0;g/kg diet, respectively. Duck meal showed high protein (51.99 ± 0.42%) and lipid contents (20.02 ± 0.54%) and a relatively balanced essential amino acid profile, although long-chain n-3 highly unsaturated fatty acids were lower. Shrimp growth, feed conversion ratio, survival, and muscle composition were not significantly affected when fish meal was replaced up to 60%, and broken-line regression analysis estimated an optimal replacement level of 59.5% based on the final weight and feed conversion ratio. However, 80% replacement significantly reduced growth and protein utilization, likely due to lower protein digestibility and insufficient n-3 HUFA supply. No significant differences in survival were observed among treatments following the <i>V. alginolyticus</i> challenge. Overall, these findings demonstrate that duck meal, as a value-added by-product within a circular economy framework, can effectively replace fish meal up to 60% in white shrimp diets, although appropriate nutritional supplementation may be required at higher inclusion levels.</p>

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Evaluation of duck meal derived from spent laying ducks as a sustainable fish meal replacement in diets for white shrimp, Penaeus vannamei

  • 期刊论文

  • 发表日期：

    2026年5月25日

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  • Wen-Chih Hsu,
  • Ya-Li Shiu,
  • Chun-Hung Liu

摘要

This study evaluated the nutritional value of duck meal as a sustainable alternative to fish meal in diets for white shrimp, Penaeus vannamei. The proximate, amino acid, and fatty acid compositions of duck meal were analyzed and compared with those of fish meal. A 56-day feeding trial was conducted to investigate the effects of replacing dietary fish meal with duck meal on the growth performance, feed utilization, apparent nutrient digestibility, whole-body composition, and resistance to Vibrio alginolyticus infection in white shrimp. Five experimental diets were formulated in which duck meal replaced 0%, 20%, 40%, 60%, and 80% of the dietary fish meal, respectively. The basal diet contained 330.9 g fish meal/kg diet, corresponding to duck meal inclusion levels of 0, 86.5, 173.1, 259.6, and 346.2 g/kg diet, respectively. Duck meal showed high protein (51.99 ± 0.42%) and lipid contents (20.02 ± 0.54%) and a relatively balanced essential amino acid profile, although long-chain n-3 highly unsaturated fatty acids were lower. Shrimp growth, feed conversion ratio, survival, and muscle composition were not significantly affected when fish meal was replaced up to 60%, and broken-line regression analysis estimated an optimal replacement level of 59.5% based on the final weight and feed conversion ratio. However, 80% replacement significantly reduced growth and protein utilization, likely due to lower protein digestibility and insufficient n-3 HUFA supply. No significant differences in survival were observed among treatments following the V. alginolyticus challenge. Overall, these findings demonstrate that duck meal, as a value-added by-product within a circular economy framework, can effectively replace fish meal up to 60% in white shrimp diets, although appropriate nutritional supplementation may be required at higher inclusion levels.