Perelman J N, Schmidt K N, Haro I, Tibbetts I R, Zischke M T
School of Biological Sciences, The University of Queensland, Brisbane, QLD, 4072, Australia.
Department of Biological Sciences, The University of Southern California, Los Angeles, CA, 90007, U.S.A.
J Fish Biol. 2017 May;90(5):1842-1860. doi: 10.1111/jfb.13270. Epub 2017 Feb 19.
This study reports the diet composition of 363 wahoo Acanthocybium solandri captured from the Indo-Pacific. The study also provides the first estimates of consumption and daily ration for the species worldwide, which are important parameters for ecosystem models and may improve ecosystem-based fisheries management. Thirty-four prey taxa were identified from A. solandri stomachs with Scombridae having the highest relative importance. Actinopterygii comprised 96% of the total prey wet mass, of which 29% were epipelagic fishes, with 22% alone from Scombridae. There was no significant relationship between fish size and the size of prey items consumed. Feeding intensity, as measured by stomach fullness, did not significantly differ either among seasons or reproductive activity. The mean daily consumption rate was estimated as 344 g day , which corresponded to a mean daily ration of 2·44% body mass day . The results from this study suggest A. solandri is an opportunistic predator similar to other pelagic piscivores, worldwide.
本研究报告了从印度-太平洋地区捕获的363条马鲛（Acanthocybium solandri）的饮食组成。该研究还首次估算了全球范围内该物种的消耗量和日摄食量，这些都是生态系统模型的重要参数，可能会改善基于生态系统的渔业管理。从马鲛的胃中鉴定出34个猎物分类单元，其中鲭科的相对重要性最高。硬骨鱼纲占猎物总湿重的96%，其中29%为上层鱼类，仅鲭科就占22%。鱼的大小与所消耗猎物的大小之间没有显著关系。以胃饱满度衡量的摄食强度在季节或繁殖活动之间也没有显著差异。平均日消耗率估计为344克/天，相当于平均日摄食量为体重的2.44%/天。这项研究的结果表明，全球范围内的马鲛是一种机会主义捕食者，类似于其他中上层食鱼动物。
