{"refrec":{"BRefID":36310,"RR":"<b>Cherel, Y.; Bocher, P.; De Broyer, C.; Hobson, K.A.</b> (2002). Food and feeding ecology of the sympatric thin-billed <i>Pachyptila belcheri</i> and Antarctic <i>P. desolata</i> prions at Iles Kerguelen, Southern Indian Ocean. <i>Mar. Ecol. Prog. Ser. 228</i>: 263-281. <a href=\"http://dx.doi.org/10.3354/meps228263\" target=\"_blank\">dx.doi.org/10.3354/meps228263</a>","BEntID":36310,"PublicFlag":1,"CheckedFlag":0,"wosflag":1,"vabbflag":1,"RefStringPartII":". <i>Mar. Ecol. Prog. Ser. 228</i>: 263-281. <a href=\"https://dx.doi.org/10.3354/meps228263\" target=\"_blank\">https://dx.doi.org/10.3354/meps228263</a>","DocTypID":8,"DocType":"Journal article","MarineFlag":1,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Cherel, Y.; Bocher, P.; De Broyer, C.; Hobson, K.A.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Cherel, Y. <i>et al.</i>","Englishabstract":"The food and feeding ecology of the 2 closely related species of prions <i>Pachyptila belcheri</i> and <i>P. desolata</i> was investigated over 3 consecutive chick-rearing periods at Iles Kerguelen, the only place where they nest sympatrically in large numbers. In all years, the 2 prion species fed on crustaceans, with a small proportion of mesopelagic fish and squid. The hyperiid amphipod <i>Themisto gaudichaudii</i> was consistently the dominant prey item, accounting for 76 and 70% by number, and 57 and 57% by reconstituted mass of the diet of <i>P. belcheri</i> and <i>P. desolata</i>, respectively. Prions, however, were segregated by feeding on different euphausiids, <i>P. belcheri</i> on <i>Thysanoessa</i> sp. (18% by number and 16% by mass) and <i>P. desolata</i> on <i>Euphausia vallentini</i> (9% by number and 15% by mass). <i>P. desolata</i> also caught more small prey such as copepods (9 vs <1% by number) and cypris larvae of <i>Lepas australis</i> (8 vs 3% by number) than <i>P. belcheri</i>, which can be related to the beak filtering apparatus present only in the former species. Biogeography of the prey and their state of digestion indicate that prions foraged in a wide variety of marine habitats, including the kelp belt, kelp rafts, and coastal, neritic and oceanic waters. Noticeable is the occurrence of <i>E. superba</i> in a significant number of food samples (15 and 10% for <i>P. belcheri</i> and <i>P. desolata</i>, respectively), suggesting feeding in distant foraging grounds in southern Antarctic waters, >1000 km from the breeding colonies, during the chick-rearing period. The stable-carbon and -nitrogen isotopic compositions of chick feathers were identical in both species, indicating no important trophic segregation during the breeding period, when adult birds are central-place foragers. The ratios were, however, different in adult feathers, suggesting moulting in Antarctic waters for <i>P. belcheri</i> and in subtropical waters for <i>P. desolata</i>, i.e. in distinct foraging areas when birds are not constrained to return to the colonies.","AbstractOtherLang":null,"BibLvlCode":"AS","StandardTitle":"Food and feeding ecology of the sympatric thin-billed <i>Pachyptila belcheri</i> and Antarctic <i>P. desolata</i> prions at Iles Kerguelen, Southern Indian Ocean","OrigTitleLangCode":"en","OrigTitleLangCodeExtended":"eng","OrigTitleLangID":15,"DateLastModified":{"date":"2024-12-10 01:33:17.368041","timezone_type":1,"timezone":"+01:00"},"UserAccessRight":null,"UserAccID":null,"AuthorKeywords":"Euphausia superba; Pachyptila; petrels; seabirds; trophic relationships; stable-carbon isotopes; stable-nitrogen isotopes; Themisto gaudichaudii","OtherDescriptors":null,"Notes":null,"AnaPub":2002,"MonPub":null,"DateUpdate":"2017-02-14","DateCreate":"2003-07-15","SecASFANote":null,"ConfID":null,"PeerRev":1,"VlizCoreFlag":1,"WoScode":"WOS:000174655000022","VABBcode":null,"OpenAcc":1,"DOI":"10.3354/meps228263"},"refs":null,"anarec":{"AnaID":36310,"PubliDate":2002,"Pagination":"263-281","XtraPublOfAnaID":null,"ISBN":null,"Volume":"228","Issue":null,"BRefMon":null,"BRefMonRR":null,"BRefXtra":null,"BRefXtraRR":null,"SerBRefID":43354,"SerRR":"Marine Ecology Progress Series. 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