Identification of alien predators that should not be removed for controlling invasive crayfish threatening endangered odonates
Identification of alien predators that should not be removed for controlling invasive crayfish threatening endangered odonates
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DOI：
10.1002/aqc.1178
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发表时间：
2011-05-01
影响因子：
2.4
通讯作者：
Miyashita, Tadashi
中科院分区：
文献类型：
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作者：
Miyake, Moe;Miyashita, Tadashi
1.当多个入侵物种共存于同一生态系统中，并且它们的饮食随着它们的生长而变化时，由于复杂的捕食者-猎物相互作用，很难确定是否要消灭任何特定的入侵者。利用稳定同位素食物网分析技术，探讨了日本某池塘中克氏原螯虾（Procambarus clarkii）的3种潜在外来捕食者（乌鳢、牛蛙和红耳滑龟）的合理管理策略.稳定同位素分析结果表明，中、小型黑鱼主要以淡水螯虾和小麦穗鱼为食物来源。成年和少年牛蛙依赖于陆生节肢动物，和青少年表现出中度依赖小龙虾。海龟对小龙虾的依赖性很小。这些结果表明，消灭黑鱼的风险的可能性mesopredator释放，而这种风险似乎是低的其他外来捕食者。版权所有（C）2011约翰威利父子有限公司
1. When multiple invasive species coexist in the same ecosystem and their diets change as they grow, determining whether to eradicate any particular invader is difficult because of complex predator-prey interactions.2. A stable isotope food-web analysis was conducted to explore an appropriate management strategy for three potential alien predators (snakehead Channa argus, bullfrog Rana catesbeiana, red-eared slider turtle Trachemys scripta elegans) of invasive crayfish Procambarus clarkii that had severely reduced the densities of endangered odonates in a pond in Japan.3. The stable isotope analysis demonstrated that medium-and small-sized snakeheads primarily depended on crayfish and stone moroko Pseudorasbora parva. Both adult and juvenile bullfrogs depended on terrestrial arthropods, and juveniles exhibited a moderate dependence on crayfish. The turtle showed little dependence on crayfish.4. These results suggest that eradication of snakeheads risks the possibility of mesopredator release, while such risk appears to be low in other alien predators. Copyright (C) 2011 John Wiley & Sons, Ltd.