Application of eDNA as a tool for assessing fish population abundance
Application of eDNA as a tool for assessing fish population abundance
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DOI：
10.1002/edn3.94
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发表时间：
2020-06
影响因子：
--
通讯作者：
Michael J. Spear;Holly S. Embke;P. Krysan;M. Jake Vander Zanden
中科院分区：
文献类型：
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作者：
Michael J. Spear;Holly S. Embke;P. Krysan;M. Jake Vander Zanden
估计生物的丰度是研究和管理生态系统的基础。然而，准确和精确地估计生物丰度是具有挑战性的，特别是在生物隐藏在水下的水生系统中。估计鱼类丰度对渔业管理至关重要，渔业管理依赖于对种群状况的准确评估，以在不过度捕捞种群的情况下实现产量最大化。监测种群状况对内陆渔业来说尤其具有挑战性，因为它们的种群分布在许多单独的水体中。如果环境DNA （eDNA）的数量与其源生物的丰度相关，那么环境DNA （eDNA）可能为快速估计大量系统中的种群提供了一种经济有效的方法。在这里，我们测试了从地表水中恢复的eDNA数量的能力，以估计在威斯康星州北部湖泊中具有重要文化和经济意义的运动鱼（Sander vitreus）的丰度。我们证明了传统估定值（包括个体数量和生物量）与eDNA浓度之间存在显著的正相关关系（R2= 0.81;n= 22）。我们的研究结果强调了eDNA作为种群监测工具的效用，可以帮助指导和通知内陆渔业管理。
Estimating the abundance of organisms is fundamental to the study and management of ecological systems. However, accurately and precisely estimating organism abundance is challenging, especially in aquatic systems where organisms are hidden underwater. Estimating the abundance of fish is critical for the management of fisheries which relies on accurate assessment of population status to maximize yield without overharvesting populations. Monitoring population status is particularly challenging for inland fisheries in which populations are distributed among many individual waterbodies. Environmental DNA (eDNA) may offer a cost‐effective way to rapidly estimate populations across a large number of systems if eDNA quantity correlates with the abundance of its source organisms. Here, we test the ability of quantities of eDNA recovered from surface water to estimate the abundance of walleye (Sander vitreus), a culturally and economically important sportfish, in lakes in northern Wisconsin (USA). We demonstrate a significant, positive relationship between traditional estimates of adult walleye populations (both number of individuals and biomass) and eDNA concentration (R2= .81;n= 22). Our results highlight the utility of eDNA as a population monitoring tool that can help guide and inform inland fisheries management.