Seasonal habitat use of white sucker Catostomus commersonii in a small Boreal lake

IF 1.4 4区 环境科学与生态学 Q3 ECOLOGY
Ian A. Richter, Karen E. Smokorowski, Paul J. Blanchfield
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Abstract

White sucker (Catostomus commersonii) is a large-bodied benthic fish species that is found across a broad geographic region in North America. Often overlooked, white suckers are an integral component of aquatic ecosystems in their role as the dominant nearshore benthivore in many lakes. Few detailed field investigations on habitat use and thermal occupancy of white sucker exist, limiting our ability to predict the risk of habitat loss from development and climate warming for this cool-water species. Here we investigated seasonal depth, temperature and spatial occupancy patterns of white suckers in a lake located in northern Ontario, Canada. Using a combination of positioning acoustic telemetry and environmental data, we determined depth and space use patterns, seasonal temperature preference indices, and the affinity of white sucker to the lake bottom (i.e., benthic habitat) over a year long period. We found that the white suckers were consistently observed in shallow waters (< 10 m depth) and near the lake bottom across all seasons but were positioned slightly deeper in the winter. The tagged white suckers showed a strong temperature selection preference for thermal habitat between 10 and 16 °C during the open-water seasons and tended to avoid cold (< 6 °C) thermal habitat. Space use patterns, calculated using kernel utilization distributions, and daily movement rates were surprisingly consistent across all seasons, with regular occupancy of only some nearshore areas. This study highlights a highly restrictive pattern of habitat use by white sucker that is consistent across seasons, suggesting that this generalist species may be more vulnerable to anthropogenic disturbance than previously thought.

Abstract Image

北方小湖中白吮吸鱼(Catostomus commersonii)的季节性栖息地利用
白吮吸鱼(Catostomus commersonii)是一种体型较大的底栖鱼类,分布于北美洲的广大地区。白吮吸鱼作为许多湖泊中最主要的近岸底栖动物,是水生生态系统不可或缺的组成部分,但却经常被忽视。有关白吸盘栖息地利用和热占据的详细实地调查很少,这限制了我们预测这种冷水物种因开发和气候变暖而丧失栖息地的风险。在这里,我们调查了加拿大安大略省北部一个湖泊中白吸盘鱼的季节性深度、温度和空间占用模式。利用定位声学遥测和环境数据相结合的方法,我们确定了白吮吸鱼的深度和空间利用模式、季节性温度偏好指数以及白吮吸鱼对湖底(即底栖栖息地)的亲和力。我们发现,在所有季节中,白吸鱼始终在浅水区(水深 10 米)和湖底附近被观察到,但在冬季则位于稍深处。在开放水域季节,被标记的白吮吸鱼对温度在10-16 °C之间的热栖息地表现出强烈的温度选择偏好,并倾向于避开低温(6 °C)热栖息地。利用核利用率分布计算得出的空间利用模式和每日移动速率在所有季节都惊人地一致,只有一些近岸区域被定期占用。这项研究强调了白吮吸鱼对栖息地使用的高度限制性模式,这种模式在各个季节都是一致的,表明这种通食性物种可能比以前认为的更容易受到人为干扰的影响。
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来源期刊
Environmental Biology of Fishes
Environmental Biology of Fishes 环境科学-海洋与淡水生物学
CiteScore
2.60
自引率
14.30%
发文量
169
审稿时长
3 months
期刊介绍: Environmental Biology of Fishes is an international journal that publishes original studies on the ecology, life history, epigenetics, behavior, physiology, morphology, systematics and evolution of marine and freshwater fishes. Empirical and theoretical papers are published that deal with the relationship between fishes and their external and internal environment, whether natural or unnatural. The journal concentrates on papers that advance the scholarly understanding of life and draw on a variety of disciplines in reaching this understanding. Environmental Biology of Fishes publishes original papers, review papers, brief communications, editorials, book reviews and special issues. Descriptions and submission requirements of these article types can be found in the Instructions for Authors.
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