Ecological tracers and at-sea observations document the foraging ecology of southern long-finned pilot whales ( Globicephala melas edwardii ) in Kerguelen waters
作者： Marina Fontaine , Alice Carravieri , Benoît Simon-Bouhet , Paco Bustamante , Nicolas Gasco
DOI: 10.1007/S00227-014-2587-3
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摘要: The food and feeding ecology of the poorly known southern long-finned pilot whale (Globicephala melas edwardii) was investigated using ecological tracers (muscle skin δ 13 C 15 N, total mercury, Hg) on individuals from two mass strandings together with at-sea observations live animals in Kerguelen waters, Indian Ocean. Sightings cetaceans longliners over 9 years (2003-2012) emphasized regular occurrence whales slope waters surrounding archipelago. Tissue values (a proxy consumer foraging habitat) suggest that fed oce- anic subantarctic last months preceding stranding. N Hg concentration (die- tary proxies) indicate a high trophic position (~4.7) for whales, likely corresponding to mixed diet fish squid (not crustaceans) undetermined species. Both
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