期刊
JOURNAL OF FISH BIOLOGY
卷 75, 期 10, 页码 2585-2605出版社
WILEY-BLACKWELL
DOI: 10.1111/j.1095-8649.2009.02453.x
关键词
diet; food subsidy; reef fish; stable isotopes; trophic overlap
资金
- Concejo Nacional de Investigacion Cientifica y Tecnica (CONICET)
- ANPCyT [PICT 10041]
- Fundacion Antorchas
- Wildlife Conservation Society [WCS 34320]
The diets of the most conspicuous reef-fish species from northern Patagonia, the carnivorous species Pseudopercis semifasciata, Acanthistius patachonicus, Pinguipes brasilianus and Sebastes oculatus were studied. Pinguipes brasilianus had the narrowest diet and most specialized feeding strategy, preying mostly on reef-dwelling organisms such as sea urchins, limpets, bivalves, crabs and polychaetes. The diet of A. patachonicus was characterized by the presence of reef and soft-bottom benthic organisms, mainly polychaetes, crabs and fishes. Pseudopercis semifasciata showed the broadest spectrum of prey items, preying upon reef, soft-bottom and transient organism (mainly fishes, cephalopods and crabs). All S. oculatus guts were empty, but stable-isotope analyses suggested that this species consumed small fishes and crabs. In general, P. brasilianus depended on local prey populations and ate different reef-dwelling prey than the other species. Pseudopercis semifasciata, A. patachonicus and probably S. oculatus, however, had overlapping trophic niches and consumed resources from adjacent environments. The latter probably reduces the importance of food as a limiting resource for these reef-fish populations, facilitating their coexistence in spite of their high trophic overlap. (C) 2009 The Authors Journal compilation (C) 2009 The Fisheries Society of the British Isles
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据