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首页> 外文期刊>Hydrobiologia >Impact of the invasive three-spined stickleback (Gasterosteus aculeatus) on relative abundance and growth of native pelagic whitefish (Coregonus wartmanni) in Upper Lake Constance
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Impact of the invasive three-spined stickleback (Gasterosteus aculeatus) on relative abundance and growth of native pelagic whitefish (Coregonus wartmanni) in Upper Lake Constance

机译：侵入性三翼山腰包（加气肌腱）对天然湖北康斯坦湖本土白鱼（Coregonus Wartmanni）的相对丰富和生长的影响

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摘要

Since 2013, the pelagic zone of Upper Lake Constance (ULC) has been subject to a massive invasion of the non-native three-spined stickleback (Gasterosteus aculeatus Linnaeus, 1758). Data from monthly monitoring of pelagic whitefish (Coregonus wartmanni Bloch, 1784) were used to compare weight-at-age and abundance of pelagic whitefish for years before (1997-2012) and after the invasion (2013-2015). Growth and abundance of pelagic whitefish is shown to be heavily influenced by stickleback presence. Mean autumn weight-at-age of whitefish decreased by 33.3% after the invasion took place and a significant decline in autumn CPUE in otherwise unfished cohorts of the population was also recorded. The results imply direct effects of stickleback presence on pelagic whitefish, including interspecific competition for food leading to reduced growth and survival, and predation of eggs and larvae, hampering recruitment. These observations coincide with a sharp decline in whitefish yield. In conclusion, this study shows that the invasion of stickleback has substantially altered the pelagic fish community of ULC, with severe consequences for commercial fisheries.
机译：自2013年以来，康斯坦茨高湖（ULC）的骨质区一直受到非天然三翼山脊的巨大入侵（加油术患者，1758）。从Pelagic White鱼的每月监测（Coregonus Wartmanni Bloch，1784）的数据用于比较前几年（1997-2012）和入侵之后的重量 - 白鲑鱼（2013-2012）。 Pelagic White鱼的生长和丰度被证明受棘爪存在的严重影响。意味着秋季体重在白鱼下降33.3％，在侵袭之后减少了33.3％，又记录了秋天CPE的显着下降，否则否则围绕着人口的队列。结果意味着探测器在皮下白鱼的直接影响，包括食物的间隙竞争导致降低生长和生存，以及鸡蛋和幼虫的捕食，妨碍招聘。这些观察结果与白鱼收益率急剧下降。总之，本研究表明，铅秸秆的入侵基本上改变了ULC的骨质鱼群，对商业渔业的严重后果。

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