Isbert W, Rodríguez-Cabello C, Frutos I, Preciado I, Montero F E, Pérez-Del-Olmo A
Unidad de Zoología Marina, Institut Cavanilles de Biodiversitat i Biologia Evolutiva, Parc Científic, Universitat de València, P. O. Box 22085, Valencia 46071, Spain.
Instituto Español de Oceanografía (IEO), Promontorio de San Martín s/n, 39004 Santander, Spain.
J Fish Biol. 2015 Feb;86(2):687-706. doi: 10.1111/jfb.12591. Epub 2014 Dec 26.
By combining an examination of stomach contents yielding a snapshot of the most recent trophic niche and the structure of parasite communities reflecting a long-term feeding niche, this study aimed at gaining more comprehensive information on the role of the small-sized deep-water velvet belly lantern shark Etmopterus spinax in the local food webs of the Galicia Bank and the canyon and valley system of the Avilés Canyon, which have been both proposed for inclusion in the Natura 2000 network of protected areas. As far as is known, this study provides the first comparative parasite infracommunity data for a deep-sea shark species. Component parasite communities in E. spinax were relatively rich, whereas the infracommunities were rather depauperate, with similar low diversity at both localities. The significant differences in the composition and structure of both parasite communities and prey assemblages indicate differential effects of the two deep-sea ecosystems on both long-term and most recent trophic niches of E. spinax. These results underline the importance of the use of multivariate analyses for the assessment of geographical variation in shark populations based on parasites and diet data.
通过结合对胃内容物的检查（可得出最近营养生态位的快照）和寄生虫群落结构（反映长期摄食生态位），本研究旨在获取关于小型深水绒毛鲨（Etmopterus spinax）在加利西亚浅滩以及阿维莱斯峡谷的峡谷和山谷系统当地食物网中作用的更全面信息，这两个区域都已被提议纳入自然2000保护区网络。据了解，本研究提供了首个关于深海鲨鱼物种的寄生虫群落内数据的比较。绒毛鲨体内的组成寄生虫群落相对丰富，而群落内则相当匮乏，两个地点的多样性都同样较低。寄生虫群落和猎物组合在组成和结构上的显著差异表明，这两个深海生态系统对绒毛鲨的长期和最近营养生态位有不同影响。这些结果强调了使用多变量分析基于寄生虫和饮食数据评估鲨鱼种群地理变异的重要性。
