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密集捕捞对入侵性圆形密度的影响
Maya S Enriquez1, Lily M Hall1, Noland O Michels1
1Department of Biology, University of Minnesota-Duluth, Duluth, Minnesota, United States of America.
PloS one
|May 8, 2024
概括
在繁殖季节对侵袭性圆形鱼进行密集捕获,使当地种群减少了67%的数量. 这种方法有望保护本地鱼类息地免受这种入侵物种的侵害.
科学领域:
- 水生生态学 水生生态学
- 侵袭性物种管理 侵袭性物种管理
- 渔业 科学 渔业 科学
背景情况:
- 圆 (Neogobius melanostomus) 是劳伦西亚大湖地区的入侵性盆地鱼,对本地鱼群产生负面影响.
- 影响包括对资源的竞争,侵略性互动,以及对本地鱼蛋的掠夺.
- 完全根除是不可行的,需要管理策略来减轻生态损害.
研究的目的:
- 评估密集捕捞对减少当地圆鱼种群的有效性.
- 确定捕捞的潜力,以保护关键的本地鱼繁殖息地.
主要方法:
- 在圆形的繁殖季节 (6月至10月) 期间,在杜鲁斯-上级港口部署了带诱的小鱼陷.
- 内部陷 (N=10) 每隔48小时清除一次,参考陷用于标记和释放研究.
- 标记圆形戈比被监测到网站忠实度,以了解运动模式.
主要成果:
- 与参考陷相比,在被密集捕获的地区观察到圆鱼捕获量下降了67%.
- 在内部陷中,长时间没有捕获圆鱼.
- 82.8%的被标记的圆形戈比表现出高位点亲和力,在释放地点被重新捕获.
结论:
- 密集的,局部的捕捞可以显著减少圆形鱼种群,即使在开放水域.
- 圆形戈比的高位点亲和力表明,捕捉陷可以有效地控制局部种群.
- 这种管理策略提供了一种可行的方法,以保护本地鱼类产卵息地免受入侵性圆形虫的侵害.
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