{"refrec":{"BRefID":230931,"RR":"<b>Ruthrauff, D.R.; Dekinga, A.; Gill, R.E.; Piersma, T.</b> (2013). Identical metabolic rate and thermal conductance in rock sandpiper (<i>Calidris ptilocnemis</i>) subspecies with contrasting nonbreeding life histories. <i>The Auk 130(1)</i>: 60-68. <a href=\"http://dx.doi.org/10.1525/auk.2012.12081\" target=\"_blank\">dx.doi.org/10.1525/auk.2012.12081</a>","BEntID":222643,"PublicFlag":1,"CheckedFlag":1,"wosflag":1,"vabbflag":null,"RefStringPartII":". <i>The Auk 130(1)</i>: 60-68. <a href=\"https://dx.doi.org/10.1525/auk.2012.12081\" target=\"_blank\">https://dx.doi.org/10.1525/auk.2012.12081</a>","DocTypID":8,"DocType":"Journal article","MarineFlag":0,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Ruthrauff, D.R.; Dekinga, A.; Gill, R.E.; Piersma, T.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Ruthrauff, D.R. <i>et al.</i>","Englishabstract":"Closely related species or subspecies can exhibit metabolic differences that reflect site-specific environmental conditions. Whether such differences represent fixed traits or flexible adjustments to local conditions, however, is difficult to predict across taxa. The nominate race of Rock Sandpiper (Calidris ptilocnemis) exhibits the most northerly nonbreeding distribution of any shorebird in the North Pacific, being common during winter in cold, dark locations as far north as upper Cook Inlet, Alaska (61 degrees N). By contrast, the tschuktschorum subspecies migrates to sites ranging from about 59 degrees N to more benign locations as far south as similar to 37 degrees N. These distributional extremes exert contrasting energetic demands, and we measured common metabolic parameters in the two subspecies held under identical laboratory conditions to determine whether differences in these parameters are reflected by their nonbreeding life histories. Basal metabolic rate and thermal conductance did not differ between subspecies, and the subspecies had a similar metabolic response to temperatures below their thermoneutral zone. Relatively low thermal conductance values may, however, reflect intrinsic metabolic adaptations to northerly latitudes. In the absence of differences in basic metabolic parameters, the two subspecies' nonbreeding distributions will likely be more strongly influenced by adaptations to regional variation in ecological factors such as prey density, prey quality, and foraging habitat. Received 19 April 2012, accepted 4 September 2012.","AbstractOtherLang":null,"BibLvlCode":"AS","StandardTitle":"Identical metabolic rate and thermal conductance in rock sandpiper (<i>Calidris ptilocnemis</i>) subspecies with contrasting nonbreeding life histories","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":"basal metabolic rate; BMR; Calidris ptilocnemis; metabolic rate;phenotypic flexibility; Rock Sandpiper; shorebirds; temperature effects;thermal conductance","OtherDescriptors":null,"Notes":null,"AnaPub":2013,"MonPub":null,"DateUpdate":"2016-06-21","DateCreate":"2013-12-01","SecASFANote":null,"ConfID":null,"PeerRev":1,"VlizCoreFlag":1,"WoScode":"WOS:000315068800007","VABBcode":null,"OpenAcc":1,"DOI":"10.1525/auk.2012.12081"},"refs":null,"anarec":{"AnaID":230931,"PubliDate":2013,"Pagination":"60-68","XtraPublOfAnaID":null,"ISBN":null,"Volume":"130","Issue":"1","BRefMon":null,"BRefMonRR":null,"BRefXtra":null,"BRefXtraRR":null,"SerBRefID":42226,"SerRR":"The Auk: A quarterly journal of ornithology. 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