Walleye Sander vitreus Mitchill have been progressively raised in hatcheries to larger sizes under the paradigm that larger stocked fish have higher survival. However, extended time in hatcheries may result in domestication, with stocked individuals lacking behaviours that promote survival. The objective of this study was to evaluate behaviour and survival of wild versus stocked fingerling (>200 mm) walleye in two Iowa reservoirs. Radio telemetry was used to evaluate walleye movement rates, depth use, home range size, habitat selection and apparent survival. Depth use increased with days since stocking and varied between lake‐years but was similar between walleye groups. Daily movement rates varied by the interaction between group and day, with rates declining through time. Home ranges did not differ between groups but were significantly greater in Big Creek than Brushy Creek. Walleye in both lakes generally used habitat in proportion to availability, with few differences between groups detected. Weekly apparent survival ranged from 0.948 to 1.000, varied across lakes, years and seasons, and was higher for stocked than wild walleye in Big Creek but not Brushy Creek. The results indicate that hatchery‐reared fingerling walleye behave similar to but can have higher survival than wild fish, suggesting that domestication may not be occurring and that stocking autumn fingerling walleye may help supplement year‐class strength.

中文翻译：

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野生与放养鱼种白斑鱼的行为和生存

Walleye Sander vitreus Mitchill 在孵化场中逐渐被养殖到更大的规格，因为更大的放养鱼具有更高的存活率。然而，在孵化场的时间延长可能会导致驯化，因为放养的个体缺乏促进生存的行为。本研究的目的是评估爱荷华州两个水库中野生与放养鱼种（>200 毫米）大眼鱼的行为和存活率。无线电遥测用于评估角膜白斑运动率、深度使用、家庭范围大小、栖息地选择和表观存活率。深度使用随着放养后的天数而增加，并且在湖年之间变化，但在角膜白斑组之间相似。每日移动率因组和天之间的相互作用而异，随着时间的推移而下降。家庭范围在各组之间没有差异，但 Big Creek 的家庭范围明显大于 Brushy Creek。两个湖泊中的角膜白斑通常按可用性比例使用栖息地，几乎没有发现群体之间的差异。每周表观存活率从 0.948 到 1.000 不等，因湖泊、年份和季节而异，放养的比 Big Creek 的野生角膜白斑鱼更高，但不是 Brushy Creek。结果表明，孵化场养殖的鱼种大眼白斑鱼的行为与野生鱼相似，但存活率更高，这表明可能不会发生驯化，秋季放养小鱼种大眼鱼可能有助于补充一年级实力。948 到 1.000，因湖泊、年份和季节而异，比 Big Creek 的野生角膜白斑鱼高，但不是 Brushy Creek。结果表明，孵化场养殖的鱼种大眼白斑鱼的行为与野生鱼相似，但存活率更高，这表明可能不会发生驯化，秋季放养小鱼种大眼鱼可能有助于补充一年级实力。948 到 1.000，因湖泊、年份和季节而异，比 Big Creek 的野生角膜白斑鱼高，但不是 Brushy Creek。结果表明，孵化场养殖的鱼种大眼鱼的行为与野生鱼相似，但存活率更高，这表明可能不会发生驯化，而秋季放养鱼种大眼鱼可能有助于补充一年级实力。