Use of terrestrial arthropod prey by a stream-dwelling cyprinid fish
Use of terrestrial arthropod prey by a stream-dwelling cyprinid fish
复制标题
溪流鲤鱼对陆地节肢动物猎物的利用
DOI：
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复制
发表时间：
1991
影响因子：
1.4
通讯作者：
G. Garman
中科院分区：
文献类型：
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作者：
G. Garman
在春季和夏季期间，研究了弗吉尼亚山前溪流中的一部分鱼类对陆地(异地)猎物的时空可用性和利用情况。四月份，陆生无脊椎动物在流网中数量最多，但在鱼胃中最不常见。相比之下，在8月份，主要的鲤科鱼类Notrois ardens的食物主要是陆地猎物，尽管溪流中陆地猎物的可获得性下降了一个数量级。其他几种共存的鱼很少吃陆生的猎物。与河流边缘或底物位置相比，漂流的陆生无脊椎动物集中在海床附近的表面。这项研究表明，个别鱼类分类群的形态和行为限制，包括捕食者回避反应，调节了给定鱼类群体中陆地猎物的使用。
SynopsisThe spatio-temporal availability to, and use of terrestrial (allochthonous) prey by, a subset of the fish assemblage of a Virginia piedmont stream were investigated during spring and summer. Terrestrial invertebrates were most abundant in drift nets, but least common in fish stomachs, during April. In contrast, during August, terrestrial prey dominated the diet of the major cyprinid fish,Notropis ardens, even though terrestrial prey availability in the stream declined by an order of magnitude. Several other co-occurring fishes only rarely consumed prey of terrestrial origin. Drifting terrestrial invertebrates, were concentrated at the surface near the thalweg, compared to stream margin or substrate locations. This study suggests that morphologial and behavioral constraints of individual fish taxa, including predator avoidance responses, regulate the use of terrestrial prey within a given fish assemblage.