Solomon Shola Gabriel, Ataguba Gabriel Arome, Itodo Gabriel Enemona
Department of Fisheries and Aquaculture, University of Agriculture, PMB 2373, Makurdi, Benue State 970001, Nigeria.
J Nutr Metab. 2017;2017:8936060. doi: 10.1155/2017/8936060. Epub 2017 Jan 23.
Following disparity of earlier results, this study tested the performance of African catfish fed dried brewer's yeast slurry meal (DBYM) based diets. Fingerlings of with pooled mean initial weight of 1.58 ± 0.01 g were stocked in hapas (1 m × 1 m × 1 m) immersed in an earthen pond at a density of 15 fish per cage. Five diets with increasing substitution of soybean meal with 25%, 50%, 75%, and 100% of dried brewer's yeast and a control without dried brewer's yeast (0% substitution) were evaluated for 8 weeks. Palatability of diets reduced with increasing levels of DBYM. Growth and utilization parameters such as weight gain, feed conversion ratio, protein efficiency ratio, and specific growth rate differed significantly ( < 0.05) among treated groups. Specific growth rate decreased with increasing substitution while the best feed conversion ratio was obtained in the diet devoid of DBYM. Protein efficiency and utilization decreased with increasing levels of DBYM. Body composition was also affected by inclusion of DBYM with significant differences ( < 0.05) being observed across the diets. The trend in body composition follows the utilization of the diets. We conclude that the optimal range of inclusion and substitution of soybean meal with DBYM in feed is between 1% and 14% of dry matter.
鉴于早期结果存在差异，本研究测试了以干啤酒酵母浆粕（DBYM）为基础的日粮对非洲鲶鱼的饲养效果。将平均初始体重为1.58±0.01克的幼鱼放养在浸于土池中的网箱（1米×1米×1米）中，每笼密度为15尾鱼。评估了五种日粮，用25%、50%、75%和100%的干啤酒酵母逐步替代豆粕，并设一种不含干啤酒酵母的对照日粮（替代率0%），试验为期8周。日粮的适口性随DBYM水平的提高而降低。处理组之间的生长和利用参数，如体重增加、饲料转化率、蛋白质效率比和特定生长率有显著差异（<0.05）。特定生长率随替代率的增加而降低，而不含DBYM的日粮饲料转化率最佳。蛋白质效率和利用率随DBYM水平的提高而降低。日粮中添加DBYM也影响鱼体组成，不同日粮间存在显著差异（<0.05）。鱼体组成的变化趋势与日粮的利用情况一致。我们得出结论，在非洲鲶鱼饲料中用DBYM替代豆粕的最佳添加和替代范围为干物质的1%至14%。
