Lake trout (Salvelinus namaycush) spawning site use in Lake Champlain
Lake trout (Salvelinus namaycush) spawning site use in Lake Champlain
复制标题
尚普兰湖的湖鳟 (Salvelinus namaycush) 产卵场的使用
DOI：
10.1016/j.jglr.2016.12.005
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发表时间：
2017
影响因子：
2.2
通讯作者：
J. E. Marsden
中科院分区：
文献类型：
--
作者：
Victoria M. Pinheiro;J. Stockwell;J. E. Marsden
在劳伦特五大湖湖鳟鱼（Salvelinus namaycush）人口的下降刺激恢复研究，解决许多湖鳟鱼的行为和生态知识的差距。然而，研究集中在湖鳟产卵行为是相对较新的，并鲜为人知的是特定性别的差异，产卵场的使用。为了测试几个假设产卵运动，我们手术植入声学遥测标签在45名男性和48名女性湖鳟和跟踪他们的运动内，三个产卵季节和8个产卵地点之间相距56公里的尚普兰湖。在产卵季节，两性在整个湖中旅行的距离相似，访问的地点也相似。男性花更多的日子在产卵季节的产卵场，更有可能每年返回到同一个首选网站，每天花更多的时间在一个网站上，往往比女性更接近网站中心。20的86条鱼（23%）喜欢在他们的标记年的网站以外的网站，他们被标记，所以假设标记网站是产卵场应谨慎对待。只有61%至74%的湖鳟返回同一地点在第二年（重复归巢）。高发生率的流浪（非归巢）可能会促进入侵湖泊和人造产卵礁的殖民化。
The decline of lake trout (Salvelinus namaycush) populations in the Laurentian Great Lakes stimulated research on restoration, addressing many knowledge gaps of lake trout behavior and ecology. However, studies focused on lake trout spawning behavior are relatively recent, and little is known about sex-specific differences in spawning site use. To test several hypotheses about spawning movements, we surgically implanted acoustic telemetry tags in 45 male and 48 female lake trout and tracked their movements within and among three spawning seasons and eight spawning sites up to 56 km apart in Lake Champlain. Both sexes traveled similar distances throughout the lake and visited a similar number of sites during the spawning season. Males spent more days during the spawning season on a spawning site, were more likely to return to the same preferred site each year, spent more time per day on a site, and tended to stay closer to site-center than females. Twenty of 86 fish (23%) preferred a site in their tagging year other than the site at which they were tagged, so the assumption that a tagging site is the spawning site should be treated with caution. Only 61 to 74% of lake trout returned to the same site in a second year (repeat homing). A high incidence of straying (non-homing) may facilitate colonization of invaded lakes and man-made spawning reefs.