Anadromy efficacy of native kokanee in Alturas Lake, Idaho

IF 1.1 4区环境科学与生态学 Q4 LIMNOLOGY Lake and Reservoir Management Pub Date : 2022-06-09 DOI:10.1080/10402381.2022.2026541

Kendra R. Eaton, K. Tardy

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引用次数: 1

Abstract

Abstract Eaton KR, Tardy KA. 2022. Anadromy efficacy of native kokanee in Alturas Lake, Idaho. Lake Reserv Manage. 38:197–208. Partial migration is a complex process that can have profound impacts on ecosystems and populations. Oncorhynchus nerka ecotypes in the Sawtooth Valley include migratory and resident populations, with each exhibiting partial migration. Kokanee can exhibit anadromous behavior and therefore are valuable for O. nerka recovery. In the Sawtooth Valley, Alturas Lake supports a native kokanee population for which the ability to produce outmigrants could influence conservation decisions. In this study, we used contemporary genetic tools to identify the life history origin of Alturas Lake O. nerka outmigrants. Additionally we use population and survival estimates to determine the extent and success of any present kokanee migration. We found that in Alturas Lake, all juvenile outmigrants are progeny of native kokanee. We also found that increased population abundance is related to a higher number of outmigrants. Furthermore, juvenile survival estimates of Alturas kokanee outmigrants were similar to juvenile Redfish Lake sockeye salmon survival estimates. These similar survival estimates and return of anadromous kokanee adults throughout program history indicate that the Alturas Lake kokanee population is successful in exhibiting anadromous behavior. While kokanee are not a focus for O. nerka recovery, this study shows the importance of partial migration in a native kokanee population in preserving the anadromous life history strategy. Our results highlight that in locations with no sockeye salmon population, like Alturas Lake, native kokanee populations are vital to O. nerka recovery and should be monitored and protected accordingly. Supplemental data for this article is available online at https://doi.org/10.1080/10402381.2022.2026541.

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爱达荷州阿尔图拉斯湖本地科卡尼的解剖效果

摘要Eaton KR, Tardy KA。2022. 爱达荷州阿尔图拉斯湖本地科卡尼的解剖效果。湖泊保护区管理。38:197-208。部分迁移是一个复杂的过程，可能对生态系统和人口产生深远影响。锯齿谷的石竹生态型包括迁徙种群和常住种群，每种种群都表现出部分迁移。红枫可以表现出雌雄同体的行为，因此对红枫的恢复很有价值。在锯齿谷，阿尔图拉斯湖供养着当地的科卡尼人，对他们来说，产生外来移民的能力可能会影响保护决策。在这项研究中，我们使用现代遗传工具来确定Alturas湖O. nerka外来移民的生活史起源。此外，我们使用人口和生存估计来确定任何目前科卡尼迁移的程度和成功。我们发现，在阿尔图拉斯湖，所有的外来幼鸟都是本地科卡尼的后代。我们还发现，人口丰度的增加与外来移民数量的增加有关。此外，外来鲑鱼的幼鱼存活率估计与红鱼湖红鲑的幼鱼存活率估计相似。在整个项目历史中，这些相似的存活估计和溯河产卵的成年科科尼的回归表明，阿尔图拉斯湖的科科尼种群成功地表现出溯河产卵的行为。虽然kokanee不是O. nerka恢复的重点，但本研究表明，在本地kokanee种群中，部分迁移对于保存溯河生活史策略的重要性。我们的研究结果强调，在没有红鲑种群的地方，如阿尔图拉斯湖，当地的红鲑种群对红鲑的恢复至关重要，应该进行相应的监测和保护。本文的补充数据可在https://doi.org/10.1080/10402381.2022.2026541上在线获得。

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Lake and Reservoir Management 环境科学-海洋与淡水生物学

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6.70%

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期刊介绍： Lake and Reservoir Management (LRM) publishes original, previously unpublished studies relevant to lake and reservoir management. Papers address the management of lakes and reservoirs, their watersheds and tributaries, along with the limnology and ecology needed for sound management of these systems. Case studies that advance the science of lake management or confirm important management concepts are appropriate as long as there is clearly described management significance. Papers on economic, social, regulatory and policy aspects of lake management are also welcome with appropriate supporting data and management implications. Literature syntheses and papers developing a conceptual foundation of lake and watershed ecology will be considered for publication, but there needs to be clear emphasis on management implications. Modeling papers will be considered where the model is properly verified but it is also highly preferable that management based on the model has been taken and results have been documented. Application of known models to yet another system without a clear advance in resultant management are unlikely to be accepted. Shorter notes that convey important early results of long-term studies or provide data relating to causative agents or management approaches that warrant further study are acceptable even if the story is not yet complete. All submissions are subject to peer review to assure relevance and reliability for management application.