Potadromous salmonids that reside in hydropower reservoirs often have a high recreational and conservation value. However, the potential seasonal turbine entrainment vulnerability patterns of potadromous salmonids are not well understood. Here, we use acoustic telemetry to test the hypothesis that adults of two species of the Salvelinus genus (bull trout and lake trout) differ in their seasonal patterns of entrainment and entrainment vulnerability over a 2‐year period. Our results show that while both species were entrained at similarly low annual rates (~1%), these two salmonids differed in their patterns of forebay residency and proximity, with implications for entrainment risk. Bull trout occupied the forebay at low rates across all seasons, with no clear seasonal pattern of forebay proximity. In contrast, lake trout displayed a strongly seasonal pattern of entrainment vulnerability with a distinct movement away from the forebay during the summer, and a large increase in forebay proximity and use in the winter and spring. These findings provide a novel species‐specific demonstration of the potential entrainment vulnerability of lake trout. The seasonal patterns of entrainment vulnerability seen in previous bull trout studies, where bull trout occupied top pelagic predator niches, were not replicated in our study where bull trout occur in sympatry with another top pelagic predator. These findings, which indicate that species composition plays an important role determining entrainment vulnerability, have important implications for the conservation of indigenous lake trout and bull trout populations, and together highlight the need for a site‐specific approach to entrainment quantification.

中文翻译：

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水力水库水库中两种同伴炭烧物种涡轮鳟的夹带率和季节性夹带脆弱性的比较

居住在水力发电库中的含磷鲑鱼通常具有很高的娱乐和保护价值。但是，人们对潜在的季风鲑鱼夹带脆弱性模式的认识并不十分清楚。在这里，我们使用声学遥测法来检验以下假设：两种沙柳藻的成虫种类（公鳟鱼和湖鳟鱼）在2年内的季节夹带和夹带脆弱性不同。我们的研究结果表明，虽然这两种物种的年捕捞率均较低（〜1％），但这两种鲑科动物的前湾定居和近邻模式不同，对诱捕风险具有影响。公牛鳟鱼在所有季节中都以较低的比率占领前湾，并且前湾附近没有明显的季节性模式。相比之下，湖鳟在夏季表现出强烈的夹带脆弱性季节性变化，其运动远离前湾，而在冬季和春季则前湾的接近度和使用率大大增加。这些发现提供了一个新的物种特异的证明，证明了鳟鱼潜在的夹带脆弱性。在以前的公牛鳟鱼研究中看到的夹带脆弱性的季节性模式，其中公牛鳟鱼占据了上层上层捕食者的ni，在我们的研究中没有复制过，因为公牛鳟鱼与另一个上层中上层捕食者共生。这些发现表明，物种组成在确定夹带脆弱性方面起着重要作用，对保护本地湖鳟和牛鳟鱼种群具有重要意义，并共同凸显了针对捕集量化的特定地点方法的必要性。