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Multi-run migratory behavior of adult male lake sturgeon in a short river
Journal of Great Lakes Research ( IF 2.2 ) Pub Date : 2021-07-06 , DOI: 10.1016/j.jglr.2021.06.012
Lisa K. Izzo 1 , Donna L. Parrish 2 , Gayle Barbin Zydlewski 3
Affiliation  

Lake sturgeon (Acipenser fulvescens) can migrate long distances to spawn, but many populations currently spawn in systems where the length of accessible riverine migratory habitat has been greatly reduced by dam construction. With the increased prevalence of shortened rivers, focusing on migratory dynamics in short rivers (<30 km) is beneficial to understanding the migratory needs of lake sturgeon populations. Here we document male lake sturgeon movements during the spawning period in the Winooski River, Vermont, USA; a river with only 17 km to the first natural upstream barrier. Male lake sturgeon were acoustically tagged (n = 25, 1215–1470 mm TL) and tracked using five to nine stationary receivers from 2017 to 2019. River discharge, temperature, the lagged effect of temperature (3-day), and time of day were significant factors describing upstream movements of tagged fish. Migrating male lake sturgeon (n = 10 in 2017, n = 18 in 2018, and n = 17 in 2019) displayed general movement patterns during the spawning period that included a single run upstream to the spawning site (60%), upstream and downstream movements throughout the river during the season (20%), or multiple runs made up the entire length of the spawning tributary to the spawning site (20%). No multi-run males were observed during 2018 when discharge was less flashy (i.e., fewer steep increases and declines in discharge) than in 2017 and 2019. These results suggest that the prevalence of multi-run spawning behavior of male lake sturgeon is related to flow conditions.



中文翻译:

成年雄性湖鲟在短河中的多次洄游行为

湖鲟(Acipenser fulvescens)) 可以长距离迁徙产卵,但许多种群目前在可到达的河流迁徙栖息地长度因大坝建设而大大减少的系统中产卵。随着缩短的河流越来越普遍,关注短河流(<30 公里)的洄游动态有利于了解湖鲟种群的洄游需求。在这里,我们记录了美国佛蒙特州威努斯基河产卵期间雄性湖鲟的运动;一条距离第一个上游天然屏障仅 17 公里的河流。从 2017 年到 2019 年,雄性湖鲟被声学标记(n = 25, 1215–1470 mm TL)并使用五到九个固定接收器进行跟踪。河流流量、温度、温度的滞后效应(3 天)和一天中的时间是描述标记鱼上游运动的重要因素。迁徙的雄性湖鲟(2017 年 n = 10,2018 年 n = 18,2019 年 n = 17)在产卵期间显示出一般的运动模式,包括单次向上游跑到产卵点(60%)、上游和下游季节期间整个河流的移动 (20%),或多次运行构成到产卵地点的产卵支流的整个长度 (20%)。与 2017 年和 2019 年相比,2018 年的排放量较 2017 年和 2019 年的排放量较少(即排放量的急剧增加和下降较少),因此未观察到多运行的雄性。这些结果表明,雄性湖鲟多运行产卵行为的流行与流动条件。2019 年 n = 17) 显示产卵期间的一般运动模式,包括单次上游到产卵地点 (60%)、整个季节河流的上游和下游运动 (20%) 或多次运行产卵地点的产卵支流的全长(20%)。与 2017 年和 2019 年相比,2018 年的排放量较 2017 年和 2019 年的排放量较少(即排放量的急剧增加和下降较少),因此未观察到多运行的雄性。这些结果表明,雄性湖鲟多运行产卵行为的流行与流动条件。2019 年 n = 17) 显示产卵期间的一般运动模式,包括单次上游到产卵地点 (60%)、整个季节河流的上游和下游运动 (20%) 或多次运行产卵地点的产卵支流的全长(20%)。与 2017 年和 2019 年相比,2018 年的排放量较 2017 年和 2019 年的排放量较少(即排放量的急剧增加和下降较少),因此未观察到多运行的雄性。这些结果表明,雄性湖鲟多运行产卵行为的流行与流动条件。

更新日期:2021-07-06
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