A comparison of the diets of silver (Seriolella punctata) and white (Seriolella caerulea) warehou
A comparison of the diets of silver (Seriolella punctata) and white (Seriolella caerulea) warehou
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银鳅（Seriolella punctata）和白鳅（Seriolella caerulea）饮食的比较
DOI：
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发表时间：
2011
期刊：
影响因子：
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通讯作者：
M. Dunn
中科院分区：
文献类型：
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作者：
P. Horn;T. Burrell;A. Connell;M. Dunn
本文报道了银纹细尾螺（Seriolella punctata）和白色纹细尾螺（Seriolella punctata）的食性。在新西兰南岛以东的查塔姆海隆，通过底拖网分别采集了478和291个样本的胃内容物，通过检查，确定了两种不同的细菌（caerulea）。这两个物种的饮食主要是远洋被囊动物，其余主要包括小甲壳类动物。小型甲壳类动物（端足类、桡足类和磷虾类）对白色仓库的重要性远大于对银仓库的重要性。由于一些甲壳类动物（主要是端足类动物）和被囊类动物之间存在共同的寄生关系，甲壳类动物的猎物中有一个未知但很小的成分被无意中摄入。查塔姆海隆的银和白色仓库分布在地理位置和深度上重叠;整个白色仓库分布与银仓库重叠。虽然有些物种之间的饮食组成的差异是明显的，这些都不太可能显着减少物种之间的被囊动物资源的竞争。银和白色仓库的壁龛可能有相当大的重叠。可能有一些行为或生物学机制在这项研究中没有确定，减少这两个物种之间的资源竞争，但了解机制，促进共存的银和白色仓库需要进一步的研究。
Abstract The diets of the silver warehou (Seriolella punctata) and the white warehou (S. caerulea), were determined from examination of the stomach contents of 478 and 291 specimens, respectively, sampled by bottom trawl on Chatham Rise to the east of South Island, New Zealand. The diets of both species were dominated by pelagic tunicates, with the remainder comprising mostly small crustaceans. The importance of small crustaceans (amphipods, copepods, and euphausiids) to white warehou was much greater than for silver warehou. An unknown but small component of the crustacean prey was ingested unintentionally owing to a common commensal relationship between some crustaceans (primarily amphipods) and tunicates. The distributions of silver and white warehous on Chatham Rise overlapped geographically and by depth; the entire white warehou distribution overlapped that for silver warehou. While some between-species differences in dietary composition were apparent, these are unlikely to markedly reduce any competition between species for the tunicate resource. It is possible that the niches of silver and white warehou overlap considerably. There may be some behavioural or biological mechanisms not identified in this study that reduce the resource competition between these two species, but understanding the mechanisms that promote the coexistence of silver and white warehou requires further study.