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首页> 外文期刊>Canadian Journal of Fisheries and Aquatic Sciences >Yellow perch (Perca flavescens) stock structure in Lake Michigan: an analysis using mark-recapture data
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Yellow perch (Perca flavescens) stock structure in Lake Michigan: an analysis using mark-recapture data

机译：密歇根湖的黄鲈（Perca flavescens）种群结构：使用标记捕获数据的分析

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摘要

To evaluate the stock structure of yellow perch (Perca flavescens) in the southern basin of Lake Michigan and in Green Bay, we analyzed recaptures from a lake-wide mark-recapture study implemented from 1996 to 2001 to infer the range and pattern of movement and spawning-site fidelity. Yellow perch generally moved south along the western shoreline, west along the southern shoreline, and north along the eastern shoreline during summer and non-summer months; the magnitude of movement was greater after spawning. Spawning yellow perch frequently returned to the same site, with 35%-80% of recaptured individuals returning to their marking site. Results from multiple tagging sites within Illinois indicated that spawners may return to larger areas rather than to specific sites, suggesting that large spawning complexes exist. Despite strong fidelity in some areas, straying was evident from all sites during spawning, resulting in mixing throughout the southern basin. Such mixing could promote gene flow and diminish stock differentiation. Dispersal of yellow perch within the southern basin of Lake Michigan occurred regularly across adjacent management boundaries. Therefore, adjacent jurisdictions may wish to consider re-examining their regulations based on this information to ensure consistent, complementary regulations that incorporate the movement patterns of yellow perch.
机译：为了评估密歇根湖南部盆地和绿湾中的黄色鲈鱼（Perca flavescens）的种群结构，我们分析了从1996年至2001年进行的全湖范围标记捕获研究的捕获，以推断其活动范围和模式。产卵现场保真度。在夏季和非夏季月份，黄鲈通常沿西部海岸线向南移动，沿南部海岸线向西移动，并沿东部海岸线向北移动。产卵后的移动幅度更大。产卵的黄色鲈鱼经常返回同一地点，有35％-80％的被捕获个体返回其标记地点。伊利诺伊州多个标记站点的结果表明，产卵者可能返回较大的区域，而不是返回特定的站点，这表明存在较大的产卵复合体。尽管某些地区保真度很高，但产卵过程中所有地点均出现了流浪现象，导致整个南部盆地混水。这种混合可以促进基因流动并减少种群分化。栖息在密歇根湖南部盆地的黄色鲈鱼经常出现在相邻的管理边界之间。因此，相邻的辖区不妨考虑根据此信息重新审查其法规，以确保采用统一的补充法规，其中包括黄鲈的活动方式。

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