{"refrec":{"BRefID":339579,"RR":"<b>Troina, G.; Riekenberg, P.M.; Van der Meer, M.T.J.; Botta, S.; Dehairs, F.; Secchi, E.R.</b> (2021). Combining isotopic analysis of bulk-skin and individual amino acids to investigate the trophic position and foraging areas of multiple cetacean species in the western South Atlantic. <i>Environ. Res. 201</i>: 111610. <a href=\"https://dx.doi.org/10.1016/j.envres.2021.111610\" target=\"_blank\">https://dx.doi.org/10.1016/j.envres.2021.111610</a>","BEntID":336214,"PublicFlag":1,"CheckedFlag":0,"wosflag":1,"vabbflag":1,"RefStringPartII":". <i>Environ. Res. 201</i>: 111610. <a href=\"https://dx.doi.org/10.1016/j.envres.2021.111610\" target=\"_blank\">https://dx.doi.org/10.1016/j.envres.2021.111610</a>","DocTypID":8,"DocType":"Journal article","MarineFlag":1,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Troina, G.; Riekenberg, P.M.; Van der Meer, M.T.J.; Botta, S.; Dehairs, F.; Secchi, E.R.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Troina, G. <i>et al.</i>","Englishabstract":"<p>    We investigated the trophic structure and habitat use of ten cetacean    species occurring in the oceanic waters of the western South Atlantic using    naturally-occurring stable isotopes. We analysed δ<sup>15</sup>N in    individual amino acids (AA) to estimate cetacean trophic position (TP) and    to evaluate the spatial differences in baseline δ<sup>15</sup>N (source    AAs). We adjusted cetacean bulk-skin δ<sup>13</sup>C and δ<sup>15</sup>Nfor the effect of trophic level using their estimated TPs, obtaining δ    <sup>13</sup>C<sub>Adjusted</sub> and δ<sup>15</sup>N<sub>Adjusted</sub>,    respectively. These values were applied to estimate the overlap in the    niche areas of cetacean baseline sources. Our analyses showed spatial    segregation between <em>Steno bredanensis</em> and the remaining    odontocetes, and the high δ<sup>15</sup>N in this species reflects its    occurrence in neritic waters of the southern region. The highest TPs were    observed in <em>Physeter macrocephalus</em>, <em>Stenella attenuata</em>and <em>Globicephala melas</em>, while the lowest TPs were reported for    <em>S. longirostris</em>, <em>S. clymene</em> and <em>Orcinus orca</em>.    Overall, source AA-δ<sup>15</sup>N showed similar patterns as those of    baseline-δ<sup>15</sup>N (zooplankton) and were higher in species sampledin the southernmost region of the study area (e.g.,<em>Delphinus delphis)</em>. Isotopic niche areas estimated using δ    <sup>13</sup>C<sub>Adjusted</sub> and δ<sup>15</sup>N<sub>Adjusted</sub>suggested high overlap in foraging area between <em>S. frontalis</em> and    <em>Tursiops truncatus</em>, with the latter occupying a higher TP. Our    analyses of δ<sup>15</sup>N in AAs provide a unique insight into the    trophic ecology, forage areas and spatial segregation in resource use amongthese cetacean populations. Additionally, our work provides AA-δ    <sup>15</sup>N baseline for future studies on the trophic ecology and    habitat use of marine organisms in the western South Atlantic.</p>","AbstractOtherLang":null,"BibLvlCode":"AS","StandardTitle":"Combining isotopic analysis of bulk-skin and individual amino acids to investigate the trophic position and foraging areas of multiple cetacean species in the western South Atlantic","OrigTitleLangCode":"en","OrigTitleLangCodeExtended":"eng","OrigTitleLangID":15,"DateLastModified":{"date":"2026-04-23 01:33:12.305819","timezone_type":1,"timezone":"+02:00"},"UserAccessRight":null,"UserAccID":null,"AuthorKeywords":"Compound-specific stable isotopes; Odontocetes; Nitrogen; South Atlantic Ocean","OtherDescriptors":null,"Notes":null,"AnaPub":2021,"MonPub":null,"DateUpdate":"2022-05-12","DateCreate":"2021-07-05","SecASFANote":null,"ConfID":null,"PeerRev":1,"VlizCoreFlag":1,"WoScode":"WOS:000703863500007","VABBcode":null,"OpenAcc":1,"DOI":"10.1016/j.envres.2021.111610"},"refs":null,"anarec":{"AnaID":339579,"PubliDate":2021,"Pagination":"111610","XtraPublOfAnaID":null,"ISBN":null,"Volume":"201","Issue":null,"BRefMon":null,"BRefMonRR":null,"BRefXtra":null,"BRefXtraRR":null,"SerBRefID":42836,"SerRR":"Environmental Research. 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