{"refrec":{"BRefID":339141,"RR":"<b>Piersma, T.; Gill, R.E.; Ruthrauff, D.R.</b> (2021). Physiomorphic transformation in extreme endurance migrants: revisiting the case of bar-tailed godwits preparing for trans-Pacific flights. <i>Front. Ecol. Evol. 9</i>: 685764. <a href=\"https://dx.doi.org/10.3389/fevo.2021.685764\" target=\"_blank\">https://dx.doi.org/10.3389/fevo.2021.685764</a>","BEntID":335776,"PublicFlag":1,"CheckedFlag":0,"wosflag":1,"vabbflag":0,"RefStringPartII":". <i>Front. Ecol. Evol. 9</i>: 685764. <a href=\"https://dx.doi.org/10.3389/fevo.2021.685764\" target=\"_blank\">https://dx.doi.org/10.3389/fevo.2021.685764</a>","DocTypID":8,"DocType":"Journal article","MarineFlag":0,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Piersma, T.; Gill, R.E.; Ruthrauff, D.R.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Piersma, T.; Gill, R.E.; Ruthrauff, D.R.","Englishabstract":"In a 1998 paper entitled “Guts don’t fly: small digestive organs in obese    bar-tailed godwits,” Piersma and Gill (1998) showed that the digestive    organs were tiny and the fat loads huge in individuals suspected of    embarking on a non-stop flight from Alaska to New Zealand. It was suggested    that prior to migratory departure, these godwits would shrink the digestive    organs used during fuel deposition and boost the size and capacity of    exercise organs to optimize flight performance. Here we document the verity    of the proposed physiomorphic changes by comparing organ sizes and body    composition of bar-tailed godwits <i>Limosa lapponica baueri</i> collectedin modesty midway during their fueling period (mid-September; fueling,    <i>n</i> = 7) with the previously published data for godwits that had just    departed on their trans-Pacific flight (October 19; flying, <i>n</i> = 9).    Mean total body masses for the two groups were nearly identical, but nearly    half of the body mass of fueling godwits consisted of water, while fat    constituted over half of total body mass of flying godwits. The two groups    also differed in their fat-free mass components. The heart and flight    muscles were heavier in fueling godwits, but these body components    constituted a relatively greater fraction of the fat-free mass in flying    godwits. In contrast, organs related to digestion and homeostasis were    heavier in fueling godwits, and most of these organ groups were also    relatively larger in fueling godwits compared to flying godwits. These    results reflect the functional importance of organ and muscle groups    related to energy acquisition in fueling godwits and the consequences of    flight-related exertion in flying godwits. The extreme physiomorphic    changes apparently occurred over a short time window (≤1 month). We    conclude that the inferences made on the basis of the 1998 paper were    correct. The cues and stimuli which moderate these changes remain to be    studied.","AbstractOtherLang":null,"BibLvlCode":"AS","StandardTitle":"Physiomorphic transformation in extreme endurance migrants: revisiting the case of bar-tailed godwits preparing for trans-Pacific flights","OrigTitleLangCode":"en","OrigTitleLangCodeExtended":"eng","OrigTitleLangID":15,"DateLastModified":{"date":"2026-04-21 01:33:01.285880","timezone_type":1,"timezone":"+02:00"},"UserAccessRight":null,"UserAccID":null,"AuthorKeywords":"body composition; exercise; fat stores; migration; organ; shorebird","OtherDescriptors":null,"Notes":null,"AnaPub":2021,"MonPub":null,"DateUpdate":"2021-11-17","DateCreate":"2021-06-17","SecASFANote":null,"ConfID":null,"PeerRev":1,"VlizCoreFlag":1,"WoScode":"WOS:000668339600001","VABBcode":null,"OpenAcc":1,"DOI":"10.3389/fevo.2021.685764"},"refs":null,"anarec":{"AnaID":339141,"PubliDate":2021,"Pagination":"685764","XtraPublOfAnaID":null,"ISBN":null,"Volume":"9","Issue":null,"BRefMon":null,"BRefMonRR":null,"BRefXtra":null,"BRefXtraRR":null,"SerBRefID":254552,"SerRR":"Frontiers in Ecology and Evolution. Frontiers Media: Lausanne.  ISSN 2296-701X; e-ISSN 2296-701X","StandardTitleSer":"Frontiers in Ecology and Evolution","ISSN":"2296-701X","AbbrevSer":"Front. Ecol. 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