The influence of smallmouth bass (Micropterus dolomieu) predation and habitat complexity on the structure of littoral zone fish assemblages
The influence of smallmouth bass (Micropterus dolomieu) predation and habitat complexity on the structure of littoral zone fish assemblages
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小口黑鲈 (Micropterus dolomieu) 捕食和生境复杂性对滨海鱼类群落结构的影响
DOI：
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发表时间：
2001
期刊：
影响因子：
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通讯作者：
Donald A. Jackson
中科院分区：
文献类型：
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作者：
Pamela S. D. Macrae;Donald A. Jackson
对安大略省中部小湖泊（50 公顷）的鱼类群落进行了表征，以确定小口黑鲈 (Micropterus dolomieu) 捕食和栖息地复杂性对沿岸带鱼类群落结构的影响。使用小鱼陷阱和目视评估收集数据。尽管有和没有小口黑鲈的湖泊之间的物种丰富度没有差异，但物种组成和相对丰度确实不同。我们确定了两种不同的鱼类组合类型：一种以体型较小的鱼类为特征，主要是鲤科动物，另一种以体型较大的鱼类为特征，例如小口黑鲈。小口黑鲈似乎减少了数量，改变了栖息地的利用，并消灭了许多小型物种，如溪刺鱼（Culaea inconstans）、黑头鲦鱼（Pimephales promelas）、珍珠鲮鱼（Margariscus margarita）和Phoxinus spp。
Fish assemblages in small lakes ( 50 ha) in central Ontario were characterized to determine the impact of smallmouth bass (Micropterus dolomieu) predation and habitat complexity on the structure of littoral zone fish assem - blages. Data were collected employing minnow traps and visual assessment. Although species richness did not differ between lakes with and without smallmouth bass, species composition and relative abundance did differ. We identified two distinct fish assemblage types: one characterized by small-bodied species, mainly cyprinids, and a second by large- bodied centrarchid species, e.g., smallmouth bass. Smallmouth bass appear to reduce abundance, alter habitat use, and extirpate many small-bodied species such as brook stickleback (Culaea inconstans), fathead minnow (Pimephales promelas), pearl dace (Margariscus margarita), and Phoxinus spp.