Resource partitioning in a tropical stream fish assemblage
Resource partitioning in a tropical stream fish assemblage
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DOI：
10.1111/j.1095-8649.2006.01126.x
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发表时间：
2006-08-01
影响因子：
2
通讯作者：
Freyhof, J.
中科院分区：
文献类型：
--
作者：
Herder, F.;Freyhof, J.
对生活在越南中部热带中等大小河流中的淡水鱼类的空间分布和营养分布进行了研究。点丰度采样，肠道内容物分析和相对肠道长度产生种间差异的生态位表达。同种的少年和成年人的栖息地和喂养生态位也不同。生态位的差异主要来自流速、基质和觅食偏好的差异。极端的专业化，如选择性喂养硬孵化蓝藻的成年Annamia normani，存在。低生态位重叠表明，这个热带鱼组合的结构是由竞争相互作用。(c)2006年作者杂志汇编（c）2006年不列颠群岛渔业协会
An assemblage of freshwater fishes inhabiting a medium-sized stream in tropical central Vietnam was investigated with respect to spatial and trophic distribution. Point-abundance sampling, gut content analysis and relative intestine length yielded interspecific differences in niche expression. Conspecific juvenile and adult habitat and feeding niches were also distinct. Niche differences arose mainly from differences in current velocity, substrata and foraging preferences. Extreme specializations, such as selective feeding on hard incustrations of cyanobacteria by adult Annamia normani, were present. The low niche overlap suggests that this tropical fish assemblage is structured by competitive interactions. (c) 2006 The Authors Journal compilation (c) 2006 The Fisheries Society of the British Isles