{"refrec":{"BRefID":240708,"RR":"<b>Ruthrauff, D.R.; Dekinga, A.; Gill, R.E.; Summers, R.W.; Piersma, T.</b> (2013). Ecological correlates of variable organ sizes and fat loads in the mostnortherly wintering shorebirds. <i>Can. J. Zool. 91</i>: 698-705. <a href=\"https://dx.doi.org/10.1139/cjz-2013-0070\" target=\"_blank\">https://dx.doi.org/10.1139/cjz-2013-0070</a>","BEntID":232405,"PublicFlag":1,"CheckedFlag":0,"wosflag":1,"vabbflag":0,"RefStringPartII":". <i>Can. J. Zool. 91</i>: 698-705. <a href=\"https://dx.doi.org/10.1139/cjz-2013-0070\" target=\"_blank\">https://dx.doi.org/10.1139/cjz-2013-0070</a>","DocTypID":8,"DocType":"Journal article","MarineFlag":0,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Ruthrauff, D.R.; Dekinga, A.; Gill, R.E.; Summers, R.W.; Piersma, T.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Ruthrauff, D.R. <i>et al.</i>","Englishabstract":"Shorebirds at northern latitudes during the nonbreeding season typically carry relatively large lipid stores and exhibit an up-regulation of lean tissues associated with digestion and thermogenesis. Intraspecific variation in these tissues across sites primarily reflects differences in environmental conditions. Rock (Calidris ptilocnemis (Coues, 1873)) and Purple (Calidris maritima (Brünnich, 1764)) sandpipers are closely related species having the most northerly nonbreeding distributions among shorebirds, living at latitudes up to 61°N in Cook Inlet, Alaska, and up to ~71°N in northern Norway, respectively. Cook Inlet is the coldest known site used by nonbreeding shorebirds, and the region’s mudflats annually experience extensive coverage of foraging sites by sea and shore-fast ice. Accordingly, Rock Sandpipers increase their fat stores to nearly 20% of body mass during winter. In contrast, Purple Sandpipers exploit predictably ice-free rocky intertidal foraging sites and maintain low (<6.5%) fat stores. Rock Sandpipers increase the mass of lean tissues from fall to winter, including contour feathers, stomach, and liver components. They also have greater lean pectoralis and supracoracoideus muscle and liver and kidney tissues compared with Purple Sandpipers in winter. This demonstrates a combined emphasis on digestive processes and thermogenesis, whereas Purple Sandpipers primarily augment organs associated with digestive processes. The high winter fat loads and increased lean tissues of Rock Sandpipers in Cook Inlet reflect the region’s persistent cold and abundant but sporadically unavailable food resources.","AbstractOtherLang":"Les oiseaux de rivage qui passent la saison internuptiale a` des latitudes septentrionales ont des réserves de graisserelativement grandes et présentent une régulation positive des tissus maigres associée a` la digestion et la thermogénèse. Desvariations spatiales intraspécifiques dans ces tissus témoignent principalement de conditions du milieu différentes. Le bécasseaudes Aléoutiennes (Calidris ptilocnemis (Coues, 1873)) et le bécasseau violet (Calidris maritima (Brünnich, 1764)) sont des espècesétroitement apparentées qui, de tous les oiseaux de rivage, ont les aires de répartition internuptiales les plus septentrionales, cesdernières pouvant aller jusqu’a` 61°N dans la baie de Cook (Alaska) et jusqu’a` ?71°N dans le nord de la Norvège, respectivement.La baie de Cook est l’endroit connu le plus froid utilisé par des oiseaux de rivage en période internuptiale, la glace marine et derive recouvrant annuellement une bonne partie des lieux d’alimentation des battures de vase de la région. Les bécasseaux desAléoutiennes accroissent donc leurs réserves de graisse jusqu’a` près de 20 % de leur masse corporelle durant l’hiver. Lesbécasseaux violets, pour leur part, exploitent des sites d’alimentation intertidaux généralement exempts de glace, maintenantainsi de faibles réserves de graisse (<6,5 %). La masse des tissus maigres, dont les pennes, l’estomac et des éléments du foie, desbécasseaux des Aléoutiennes augmente de l’automne a` l’hiver. En hiver, leurs tissus maigres des muscles pectoraux et coracoïdienset du foie et des reins sont également plus importants que chez les bécasseaux violets. Ces observations démontrentl’intervention combinée de processus digestifs et de la thermogénèse chez les bécasseaux des Aléoutiennes, alors qu’uneaugmentation de la taille des organes associés aux processus digestifs est le principal mécanisme intervenant chez les bécasseauxviolets. Les grandes charges hivernales de graisse et l’augmentation de la masse des tissus maigres chez les bécasseaux desAléoutiennes dans la baie de Cook reflètent le froid persistant et les ressources alimentaires abondantes, bien que périodiquementindisponibles, qui caractérisent cette région.","BibLvlCode":"AS","StandardTitle":"Ecological correlates of variable organ sizes and fat loads in the mostnortherly wintering shorebirds","OrigTitleLangCode":"en","OrigTitleLangCodeExtended":"eng","OrigTitleLangID":15,"DateLastModified":{"date":"2026-04-19 01:31:37.248674","timezone_type":1,"timezone":"+02:00"},"UserAccessRight":null,"UserAccID":null,"AuthorKeywords":" energetics; lipid stores; Purple Sandpiper; Calidris maritima; Rock Sandpiper; Calidris ptilocnemis; storage strategies; temperature effects; thermogenesis","OtherDescriptors":null,"Notes":null,"AnaPub":2013,"MonPub":null,"DateUpdate":"2019-10-23","DateCreate":"2014-08-21","SecASFANote":null,"ConfID":null,"PeerRev":1,"VlizCoreFlag":1,"WoScode":"WOS:000325434800003","VABBcode":null,"OpenAcc":1,"DOI":"10.1139/cjz-2013-0070"},"refs":null,"anarec":{"AnaID":240708,"PubliDate":2013,"Pagination":"698-705","XtraPublOfAnaID":null,"ISBN":null,"Volume":"91","Issue":null,"BRefMon":null,"BRefMonRR":null,"BRefXtra":null,"BRefXtraRR":null,"SerBRefID":42541,"SerRR":"Canadian Journal of Zoology = Revue canadienne de zoologie. 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