This study determined whether accumulated liver and visceral lipid in yellow perch can be alleviated by feeding an appropriate starch source. We compared the growth performance, nutritional composition and health of yellow perch fed a control diet (no added starch) and three diets with corn, potato or wheat starch (200 g/kg diet) to replace an equal proportion of fishmeal in the control diet. Dietary starch led to increased bulk density, hardness and gelatinization levels of feed pellets compared with the control diet. At the end of an 8‐week feeding, all fish fed the test diets had similar growth rates (p > .05). However, the wheat starch diet resulted in significantly enlarged livers and increased accumulation of lipid in the liver, viscera and whole body (p < .05). This diet also caused significantly higher levels of fasting glucose, aspartate aminotransferase and alkaline phosphatase activities in serum than the control diet. Liver cell diameters were larger, and Kupffer cell numbers were lower in the fish fed the wheat starch than those fed the control diet. Potato or corn starch had less impact on fish health and is considered to be an appropriate carbohydrate sources for yellow perch under the current testing conditions.

中文翻译：

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黄鲈幼鱼饲料中不同淀粉的营养品质

本研究确定是否可以通过喂食适当的淀粉源来减轻黄鲈体内积累的肝脏和内脏脂质。我们比较了饲喂对照日粮（不添加淀粉）和用玉米、马铃薯或小麦淀粉（200 g/kg 日粮）代替对照日粮中相同比例的鱼粉的三种日粮的黄鲈的生长性能、营养成分和健康状况. 与对照日粮相比，日粮淀粉导致饲料颗粒的堆积密度、硬度和糊化水平增加。在 8 周饲喂结束时，所有饲喂试验日粮的鱼都具有相似的生长速率（p > .05）。然而，小麦淀粉饮食导致肝脏显着增大，肝脏、内脏和全身的脂质积累增加（p < .05）。这种饮食还导致空腹血糖水平显着升高，血清中天冬氨酸氨基转移酶和碱性磷酸酶活性高于对照饮食。与喂食对照饮食的鱼相比，喂食小麦淀粉的鱼的肝细胞直径更大，库普弗细胞数量更低。马铃薯或玉米淀粉对鱼类健康的影响较小，在目前的测试条件下被认为是黄鲈的合适碳水化合物来源。