Hatchery propagation techniques, such as pellet-rearing, can result in altered feeding behaviour. Walleye Sander vitreus (Mitchill) is a commonly propagated sportfish, yet little is known regarding its ability to switch to live prey post-stocking. The objectives were to evaluate temporal changes in diet composition and condition as well as evaluate the relationship between total length and presence of different prey consumed by stocked walleye fry and fingerlings. Fingerling walleye had higher average proportions of empty stomachs and benthic invertebrates but less fish that stocked walleye fry. The presence of zooplankton, benthic invertebrates or fish was not related to walleye length. Walleye condition was similar between cohorts and did not change over days post-stocking. Percent similarity index values between cohorts were variable (0.0 to 67.9%). It was concluded that stocked walleye fingerlings consume lower quality prey items than stocked fry counterparts at least up to 49-day post-stocking, which may have implications for post-stocking survival.

中文翻译：

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转变发生：评估秋季放养的角膜白斑 Sander vitreus 转变为自然猎物的能力

孵化繁殖技术，如颗粒饲养，会导致饲养行为的改变。Walleye Sander 玻璃体(Mitchill) 是一种普遍繁殖的游鱼，但对其在放养后转换为活猎物的能力知之甚少。目的是评估饮食成分和条件的时间变化，以及评估总长度与被放养的角膜白斑鱼苗和鱼种消耗的不同猎物的存在之间的关系。鱼种大眼鱼的空腹和底栖无脊椎动物的平均比例较高，但放养大眼鱼苗的鱼较少。浮游动物、底栖无脊椎动物或鱼类的存在与角膜白斑长度无关。各组之间的角膜白斑状况相似，并且在放养后的几天内没有变化。群组之间的百分比相似性指数值是可变的（0.0 到 67.9%）。