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Coming up for air: thermal dependence of dive behaviours and metabolism in sea snakes

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dc.contributor Australian Institute Of Marine Science
dc.contributor Univ Tasmania
dc.contributor Csiro Agr & Food
dc.contributor James Cook Univ
dc.contributor Coll Marine & Environm Sci
dc.contributor James Cook University
dc.contributor University Of Tasmania
dc.contributor Australian Inst Marine Sci
dc.contributor Ctr Sustainable Trop Fisheries & Aquaculture CLARK, TIMOTHY D. UDYAWER, VINAY SIMPFENDORFER, COLIN A. HEUPEL, MICHELLE R. 2016-11-09T04:50:29Z 2017-03-21T01:06:47Z 2016-11-09T04:50:29Z 2019-07-08T02:08:18Z 2016-11-09T04:50:29Z 2016-11-09T04:50:29Z 2017-03-21T01:06:47Z 2019-07-08T02:08:18Z 2016-11-01
dc.identifier.citation Udyawer V, Simpfendorfer CA, Heupel MR, Clark TD (2016) Coming up for air: thermal-dependence of dive behaviours and metabolism in sea snakes. Journal of Experimental Biology 219(21): 3447-3454 en_US
dc.identifier.issn 0022-0949
dc.description.abstract Cutaneous gas exchange allows some air-breathing diving ectotherms to supplement their pulmonary oxygen uptake, which may allow prolongation of dives and an increased capacity to withstand anthropogenic and natural threatening processes that increase submergence times. However, little is known of the interplay between metabolism, bimodal oxygen uptake and activity levels across thermal environments in diving ectotherms. Here, we show in two species of sea snake (spine-bellied sea snake, Hydrophis curtus; and elegant sea snake, Hydrophis elegans) that increasing temperature elevates surfacing rate, increases total oxygen consumption and decreases dive duration. The majority of dives observed in both species remained within estimated maximal aerobic limits. While cutaneous gas exchange accounted for a substantial proportion of total oxygen consumption (up to 23%), unexpectedly it was independent of water temperature and activity levels, suggesting a diffusion-limited mechanism. Our findings demonstrate that rising water temperature and a limited capability to up-regulate cutaneous oxygen uptake may compromise the proficiency with which sea snakes perform prolonged dives. This may hinder their capacity to withstand ongoing anthropogenic activities like trawl fishing, and increase their susceptibility to surface predation as their natural environments continue to warm.
dc.description.sponsorship This project was funded by the Australian Government's National Environmental Research Program (Tropical Ecosystems Hub) and the School of Earth and Environmental Sciences (SEES), James Cook University. en_US
dc.description.uri en_US
dc.language English
dc.language.iso en en_US
dc.publisher The Company of Biologists en_US
dc.relation.ispartof Null
dc.subject Great-barrier-reef
dc.subject Blood Acid-base
dc.subject Biology
dc.subject Cutaneous Oxygen-uptake
dc.subject Hydrophis Elegans
dc.subject Aerobic Limits
dc.subject Incidental Trawl Bycatch
dc.subject Diving Behavior
dc.subject Life Sciences & Biomedicine - Other Topics
dc.subject Pelamis-platurus
dc.subject Accelerometer
dc.subject Hydrophis (lapemis) Curtus
dc.subject Aipysurus-laevis
dc.subject Marine Snakes
dc.subject Acrochordus-arafurae
dc.subject Aquatic Respiration
dc.subject Bimodal Gas Exchange
dc.subject Turtle
dc.title Coming up for air: thermal dependence of dive behaviours and metabolism in sea snakes
dc.type journal article en_US
dc.identifier.doi 10.1242/jeb.146571
dc.identifier.wos WOS:000386835800023

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