{"refrec":{"BRefID":287810,"RR":"<b>Christiansen, J.S.; Hop, H.; Nilssen, E.M.; Joensen, J.</b> (2012). Trophic ecology of sympatric Arctic gadoids, <i>Arctogadus glacialis</i> (Peters, 1872) and <i>Boreogadus saida</i> (Lepechin, 1774), in NE Greenland. <i>Polar Biol. 35(8)</i>: 1247-1257. <a href=\"https://dx.doi.org/10.1007/s00300-012-1170-y\" target=\"_blank\">https://dx.doi.org/10.1007/s00300-012-1170-y</a>","BEntID":279835,"PublicFlag":1,"CheckedFlag":1,"wosflag":1,"vabbflag":1,"RefStringPartII":". <i>Polar Biol. 35(8)</i>: 1247-1257. <a href=\"https://dx.doi.org/10.1007/s00300-012-1170-y\" target=\"_blank\">https://dx.doi.org/10.1007/s00300-012-1170-y</a>","DocTypID":8,"DocType":"Journal article","MarineFlag":1,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Christiansen, J.S.; Hop, H.; Nilssen, E.M.; Joensen, J.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Christiansen, J.S. <i>et al.</i>","Englishabstract":"Two gadoid fishes, <i>Arctogadus glacialis</i> and <i>Boreogadus saida</i>, often coexist (i.e. sympatric) in the fjords and shelf areas of the Arctic seas, where they likely share the same food resources. Diet composition from stomach contents, i.e. frequency of occurrence (FO) and Schoener’s index (SI), and stable isotope signatures (δ<sup>13</sup>C and δ<sup>15</sup>N) in muscle of these sympatric gadoids were examined from two fjords in NE Greenland—Tyrolerfjord (TF, ~74ºN, sill present) and Dove Bugt (DB, ~76ºN, open). Twenty-three prey taxa and categories were identified and both gadoids ate mostly crustaceans. The SI values of 0.64–0.70 indicated possible resource competition, whereas FO differed significantly. <i>A. glacialis</i> fed mainly on the mysid <i>Mysis oculata</i> and other benthic-associated prey, whereas <i>B. saida</i> ate the copepod <i>Metridia longa</i> and other pelagic prey. Both diet and stable isotopes strongly suggest a spatial segregation in feeding habitat, with <i>A. glacialis</i> being associated with the benthic food web (mean δ<sup>13</sup>C = −20.81‰, δ<sup>15</sup>N = 14.92‰) and <i>B. saida</i> with the pelagic food web (mean δ<sup>13</sup>C = −21.25‰, δ<sup>15</sup>N = 13.64‰). The dietary differences and isotopic signals were highly significant in the secluded TF and less clear in the open DB, where prey and predators may be readily advected from adjacent areas with other trophic conditions. This is the first study on the trophic position of <i>A.</i><i>glacialis</i> inferred from analyses of stable isotopes. The subtle interaction between the Arctic gadoids should be carefully monitored in the light of ocean warming and on-going invasions of boreal fishes into the Arctic seas.","AbstractOtherLang":null,"BibLvlCode":"AS","StandardTitle":"Trophic ecology of sympatric Arctic gadoids, <i>Arctogadus glacialis</i> (Peters, 1872) and <i>Boreogadus saida</i> (Lepechin, 1774), in NE Greenland","OrigTitleLangCode":"en","OrigTitleLangCodeExtended":"eng","OrigTitleLangID":15,"DateLastModified":{"date":"2026-05-18 01:32:53.999931","timezone_type":1,"timezone":"+02:00"},"UserAccessRight":null,"UserAccID":null,"AuthorKeywords":"Arctic gadoids Dietary overlap Stable isotopes Trophic ecology ","OtherDescriptors":null,"Notes":null,"AnaPub":2012,"MonPub":null,"DateUpdate":"2018-02-13","DateCreate":"2017-08-09","SecASFANote":null,"ConfID":null,"PeerRev":1,"VlizCoreFlag":1,"WoScode":"WOS:000306345800010","VABBcode":null,"OpenAcc":0,"DOI":"10.1007/s00300-012-1170-y"},"refs":null,"anarec":{"AnaID":287810,"PubliDate":2012,"Pagination":"1247-1257","XtraPublOfAnaID":null,"ISBN":null,"Volume":"35","Issue":"8","BRefMon":null,"BRefMonRR":null,"BRefXtra":null,"BRefXtraRR":null,"SerBRefID":43637,"SerRR":"Polar Biology. 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