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dc.contributor.authorDavenport, J.
dc.contributor.authorFraher, J.
dc.contributor.authorFitzgerald, E.
dc.contributor.authorMcLaughlin, P.
dc.contributor.authorDoyle, T.
dc.contributor.authorHarman, L.
dc.contributor.authorCuffe, T.
dc.contributor.authorDockery, P.
dc.date.accessioned2018-09-20T16:05:12Z
dc.date.available2018-09-20T16:05:12Z
dc.date.issued2009-10-16
dc.identifier.citationDavenport, J. Fraher, J.; Fitzgerald, E.; McLaughlin, P.; Doyle, T.; Harman, L.; Cuffe, T.; Dockery, P. (2009). Ontogenetic changes in tracheal structure facilitate deep dives and cold water foraging in adult leatherback sea turtles. Journal of Experimental Biology 212 (21), 3440-3447
dc.identifier.issn0022-0949,1477-9145
dc.identifier.urihttp://hdl.handle.net/10379/11071
dc.description.abstractAdult leatherbacks are large animals (300-500 kg), overlapping in size with marine pinniped and cetacean species. Unlike marine mammals, they start their aquatic life as 40-50 g hatchlings, so undergo a 10,000-fold increase in body mass during independent existence. Hatchlings are limited to the tropics and near-surface water. Adults, obligate predators on gelatinous plankton, encounter cold water at depth (<1280m) or high latitude and are gigantotherms that maintain elevated core body temperatures in cold water. This study shows that there are great ontogenetic changes in tracheal structure related to diving and exposure to cold. Hatchling leatherbacks have a conventional reptilian tracheal structure with circular cartilaginous rings interspersed with extensive connective tissue. The adult trachea is an almost continuous ellipsoidal cartilaginous tube composed of interlocking plates, and will collapse easily in the upper part of the water column during dives, thus avoiding pressure-related structural and physiological problems. It is lined with an extensive, dense erectile vascular plexus that will warm and humidify cold inspired air and possibly retain heat on expiration. A sub-luminal lymphatic plexus is also present. Mammals and birds have independently evolved nasal turbinates to fulfil such a respiratory thermocontrol function; for them, turbinates are regarded as diagnostic of endothermy. This is the first demonstration of a turbinate equivalent in a living reptile.
dc.publisherThe Company of Biologists
dc.relation.ispartofJournal of Experimental Biology
dc.subjectleatherback turtle
dc.subjectdermochelys
dc.subjecttracheal structure
dc.subjectvascular plexus
dc.subjectdiving
dc.subjectgigantothermy
dc.subjectdermochelys-coriacea
dc.subjectdiving behavior
dc.subjectmarine turtles
dc.subjectgigantothermy
dc.subjecttemperature
dc.subjectendothermy
dc.subjectphylogeny
dc.subjectpatterns
dc.subjectbends
dc.titleOntogenetic changes in tracheal structure facilitate deep dives and cold water foraging in adult leatherback sea turtles
dc.typeArticle
dc.identifier.doi10.1242/jeb.034991
dc.local.publishedsourcehttp://jeb.biologists.org/content/212/21/3440.full.pdf
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