Stream drift feeding and microhabitat competition of invasive smallmouth bass Micropterus dolomieu, native Japanese dace Tribolodon hakonensis and pale chub Opsariichthys platypus in the Nogu River, Japan
Stream drift feeding and microhabitat competition of invasive smallmouth bass Micropterus dolomieu, native Japanese dace Tribolodon hakonensis and pale chub Opsariichthys platypus in the Nogu River, Japan
复制标题
日本野古河中入侵小口黑鲈 Micropterus dolomieu、日本本土鲮鱼 Tribolodon hakonensis 和白鲢 Opsariichthys 鸭嘴兽的溪流漂流取食和微生境竞争
DOI：
10.1007/s10641-019-0844-5
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发表时间：
2019
影响因子：
1.4
通讯作者：
S. Kitano
中科院分区：
文献类型：
--
作者：
M. Peterson;S. Kitano
研究了日本长野县野谷河本地鲈鱼、白鲑和入侵小嘴鲈鱼的觅食行为和微生境利用。鲈鱼、鲮鱼和小嘴鲈鱼都以漂食为主要的觅食行为。鲈鱼漂食频率最高，其次是鲮鱼，而小嘴鲈鱼漂食频率明显低于两种本地物种。鲈鱼和鲮鱼利用的微生境流速显著高于小口黑鲈。然而，与体型较大的鱼相比，在流速较低的地区发现了体型较小的鱼和鲮鱼。小口鲈鱼和本地鲤科鱼类之间的猎物资源竞争，特别是较小的个体，由于相似的摄食方法和微栖息地的使用。
Foraging behavior and microhabitat use of native Japanese dace, pale chub, and invasive smallmouth bass were studied in the Nogu River, Nagano, Japan. Chub, dace and smallmouth bass all used drift feeding as their dominant foraging behavior. Chub drift fed most frequently, followed by dace, and smallmouth bass drift fed significantly less frequently than both native species. Chub and dace utilized microhabitat that had significantly higher flow velocity than smallmouth bass. However, smaller chub and dace were found in areas with lower flow velocity compared to larger individuals. Prey resource competition between smallmouth bass and native cyprinids, especially smaller individuals, is suspected due to similar feeding methods and microhabitat use.