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首页> 外文期刊>Conservation Biology >Use of sibling relationship reconstruction to complement traditional monitoring in fisheries management and conservation of brown trout
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Use of sibling relationship reconstruction to complement traditional monitoring in fisheries management and conservation of brown trout

机译：利用同胞关系重建来补充传统的渔业管理和鳟鱼养护监测

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摘要

Declining trends in the abundance of many fish urgently call for more efficient and informative monitoring methods that would provide necessary demographic data for the evaluation of existing conservation, restoration, and management actions. We investigated how genetic sibship reconstruction from young-of-the-year brown trout (Salmo trutta L.) juveniles provides valuable, complementary demographic information that allowed us to disentangle the effects of habitat quality and number of breeders on juvenile density. We studied restored (n = 15) and control (n = 15) spawning and nursery habitats in 16 brown trout rivers and streams over 2 consecutive years to evaluate the effectiveness of habitat restoration activities. Similar juvenile densities both in restored and control spawning and nursery grounds were observed. Similarly, no differences in the effective number of breeders, N-b(SA), were detected between habitats, indicating that brown trout readily used recently restored spawning grounds. Only a weak relationship between the N-b(SA) and juvenile density was observed, suggesting that multiple factors affect juvenile abundance. In some areas, very low estimates of N-b(SA) were found at sites with high juvenile density, indicating that a small number of breeders can produce a high number of progeny in favorable conditions. In other sites, high N-b(SA) estimates were associated with low juvenile density, suggesting low habitat quality or lack of suitable spawning substrate in relation to available breeders. Based on these results, we recommend the incorporation of genetic sibship reconstruction to ongoing and future fish evaluation and monitoring programs to gain novel insights into local demographic and evolutionary processes relevant for fisheries management, habitat restoration, and conservation.
机译：许多鱼类的丰度下降趋势迫切需要更加有效和信息丰富的监测方法，这些方法将为评估现有的养护，恢复和管理行动提供必要的人口统计数据。我们调查了年幼鳟鱼（Salmo trutta L.）少年的遗传同居关系重建如何提供有价值的补充人口统计学信息，从而使我们能够区分栖息地质量和育种者数量对少年密度的影响。我们研究了连续两年中在16条褐鳟河和溪流中恢复的（n = 15）和控制的（n = 15）产卵和苗圃栖息地，以评估栖息地恢复活动的有效性。在恢复和控制产卵场和苗圃场均观察到类似的幼体密度。同样，在生境之间未检测到有效育种家数N-b（SA）的差异，这表明最近使用过的鳟鱼恢复了产卵地。仅观察到N-b（SA）与少年密度之间的弱关系，这表明有多种因素影响少年的丰度。在某些地区，在幼虫密度高的地区发现的N-b（SA）估计值很低，这表明少数繁殖者可以在有利的条件下产生大量后代。在其他地点，较高的N-b（SA）估计值与较低的幼体密度有关，表明相对于可用的育种者而言，栖息地质量较低或缺乏合适的产卵基质。基于这些结果，我们建议将遗传同胞关系重建纳入正在进行的和未来的鱼类评估和监测计划中，以获得对与渔业管理，栖息地恢复和保护有关的当地人口和进化过程的新颖见解。

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