期刊
JOURNAL OF THE MARINE BIOLOGICAL ASSOCIATION OF THE UNITED KINGDOM
卷 99, 期 1, 页码 19-29出版社
CAMBRIDGE UNIV PRESS
DOI: 10.1017/S0025315417001862
关键词
Temperate rocky reefs; fish assemblages; kelp forests; recreational fisheries; stomach contents; stable isotope ratios
资金
- Autonomous Government of Galicia, Xunta de Galicia: PECOS project [PGIDIT05RMA10301PR]
- Autonomous Government of Galicia, Xunta de Galicia: RECREGES project [ED481B2014/034-0]
Although necessary for sustainable management of coastal ecosystems the understanding of trophic ecology of kelp fishes remains largely limited in the NE Atlantic. In this paper, stable isotope ratios of carbon (C) and nitrogen (N), complementarily with analyses of stomach contents, were used to investigate the trophic ecology of an Atlantic kelp forest fish assemblage targeted by spear fishers in Galicia (NW Spain). Trophic habits of the fishes were consistent across the species ranges and six trophic niches were identified. Chelon labrosus was the only pelagic omnivore, while Conger conger and Dicentrarchus labrax were the principal predators, preying on benthic osteichthyes. The intermediate carnivorous Diplodus sargus mainly preyed on benthic molluscs, while Labrus bergylta exploited a wider range of prey. Although associated with different trophic niches, the two morphotypes of L. bergylta showed some degree of diet overlap, providing little support to the hypothesis of their separate management. Moreover, L. bergylta can be a keystone species whose adequate management has relevant implications for the sustainable use of the European kelp forest ecosystems.
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