北温带湖泊黄鲈鱼的季节性栖息地利用

IF 1.1 Q3 FISHERIES
Levi M. Feucht, Logan W. Sikora, Gabrielle P. Shay, Greg G. Sass, Joseph T. Mrnak
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引用次数: 1

摘要

特定物种鱼类生物学、生态学和栖息地使用的知识对于科学管理至关重要。黄鲈鱼是一种重要的生态和娱乐鱼类。然而,对于许多北温带系统(如威斯康星州的内陆湖泊),人们对黄鲈鱼的季节性栖息地使用和生态知之甚少。2021年开放水域期间,我们对水晶湖(威斯康星州维拉斯公司)沿岸和远洋栖息地之间的黄鲈鱼季节性空间分布、大小-结构和状况进行了表征。季节性空间分布和种群规模-结构的特征是分别使用迷你刺网和垂直刺网在沿海和远洋栖息地进行同期采样。沿海地区黄鲈鱼的相对丰度估计值在早春期间最高,在整个开放水域季节都有所下降。黄鲈鱼的上层相对丰度估计值在春季最低,在分层开始时达到峰值,然后下降,并在整个开放水域季节保持相对一致。总的来说,黄鲈鱼的种群规模、结构和条件在远洋区最大。我们的研究结果表明,春季产卵后,较大的黄颡鱼更喜欢/选择远洋栖息地,而亚成年和幼鱼更喜欢或选择沿海栖息地,这可能是由于捕食者避难所和(或)资源可用性的增加。我们的研究结果强调了评估渔具和渔业评估偏差的重要性,特别是当目标物种可能在一个系统内使用一系列栖息地类型时。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Seasonal habitat use of yellow perch Perca flavescens in a north-temperate lake

Seasonal habitat use of yellow perch Perca flavescens in a north-temperate lake

Knowledge of species-specific fish biology, ecology, and habitat use is critical for informing science-based management. Yellow perch Perca flavescens are an ecologically and recreationally important fish species. Yet, for many north-temperate systems (e.g. inland lakes of Wisconsin), little is known about yellow perch seasonal habitat use and ecology. We characterised yellow perch seasonal spatial distribution, size–structure, and condition between littoral and pelagic habitats in Crystal Lake (Vilas Co., WI) during the open water period of 2021. Seasonal spatial distribution and population size–structure were characterised by contemporaneous sampling in littoral and pelagic habitats using mini-fyke nets and vertical gill nets, respectively. Relative abundance estimates for yellow perch in the littoral zone were greatest during early spring and declined throughout the open water season. Yellow perch pelagic relative abundance estimates were lowest in spring, peaked at the onset of stratification, and then declined and remained relatively consistent throughout the open water season. In general, yellow perch population size–structure and condition were greatest in the pelagic zone. Our findings suggest that after spring spawning, larger yellow perch prefer/select pelagic habitats, while sub-adults and juveniles prefer/select littoral habitats, potentially resulting from increased predator refugia and(or) resource availability. Our results emphasise the importance of evaluating gear and fishery assessment bias, particularly when the target species may use a range of habitat types within a system.

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