{"refrec":{"BRefID":291309,"RR":"<b>Williams, T.M.; Blackwell, S.B.; Richter, B.; Sinding, M.-H.S.; Heide-Jørgensen, M.-P.</b> (2017). Paradoxical escape responses by narwhals (<i>Monodon monoceros</i>). <i>Science (Wash.) 358(6368)</i>: 1328-1331. <a href=\"https://dx.doi.org/10.1126/science.aao2740\" target=\"_blank\">https://dx.doi.org/10.1126/science.aao2740</a>","BEntID":283352,"PublicFlag":1,"CheckedFlag":1,"wosflag":1,"vabbflag":1,"RefStringPartII":". <i>Science (Wash.) 358(6368)</i>: 1328-1331. <a href=\"https://dx.doi.org/10.1126/science.aao2740\" target=\"_blank\">https://dx.doi.org/10.1126/science.aao2740</a>","DocTypID":8,"DocType":"Journal article","MarineFlag":0,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Williams, T.M.; Blackwell, S.B.; Richter, B.; Sinding, M.-H.S.; Heide-Jørgensen, M.-P.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Williams, T.M. <i>et al.</i>","Englishabstract":"Until recent declines in Arctic sea ice levels, narwhals (Monodon monoceros) have lived in relative isolation from human perturbation and sustained predation pressures. The resulting naïvety has made this cryptic, deep-diving cetacean highly susceptible to disturbance, although quantifiable effects have been lacking. We deployed a submersible, animal-borne electrocardiograph-accelerometer-depth recorder to monitor physiological and behavioral responses of East Greenland narwhals after release from net entanglement and stranding. Escaping narwhals displayed a paradoxical cardiovascular down-regulation (extreme bradycardia with heart rate ≤4 beats per minute) superimposed on exercise up-regulation (stroke frequency >25 strokes per minute and energetic costs three to six times the resting rate of energy expenditure) that rapidly depleted onboard oxygen stores. We attribute this unusual reaction to opposing cardiovascular signals—from diving, exercise, and neurocognitive fear responses—that challenge physiological homeostasis.","AbstractOtherLang":null,"BibLvlCode":"AS","StandardTitle":"Paradoxical escape responses by narwhals (<i>Monodon monoceros</i>)","OrigTitleLangCode":"en","OrigTitleLangCodeExtended":"eng","OrigTitleLangID":15,"DateLastModified":{"date":"2026-06-15 01:33:02.082588","timezone_type":1,"timezone":"+02:00"},"UserAccessRight":null,"UserAccID":null,"AuthorKeywords":null,"OtherDescriptors":null,"Notes":null,"AnaPub":2017,"MonPub":null,"DateUpdate":"2018-02-13","DateCreate":"2017-12-08","SecASFANote":null,"ConfID":null,"PeerRev":1,"VlizCoreFlag":1,"WoScode":"WOS:000417254700064","VABBcode":null,"OpenAcc":0,"DOI":"10.1126/science.aao2740"},"refs":null,"anarec":{"AnaID":291309,"PubliDate":2017,"Pagination":"1328-1331","XtraPublOfAnaID":null,"ISBN":null,"Volume":"358","Issue":"6368","BRefMon":null,"BRefMonRR":null,"BRefXtra":null,"BRefXtraRR":null,"SerBRefID":43776,"SerRR":"Science (Washington). 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