Literaturdatenbank
Literaturdatenbank |
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Booth, D. T. (2008). Swimming for your life: locomotor effort and oxygen consumption during the green turtle (chelonia mydas) hatchling frenzy. Journal of Experimental Biology, 212(1), 50–55.
Added by: Sarina Wunderlich (15 Mar 2009 16:46:25 UTC) |
| Resource type: Journal Article DOI: 10.1242/jeb.019778 BibTeX citation key: Booth2008a View all bibliographic details  |
Categories: General Keywords: Chelonia, Chelonia mydas, Cheloniidae, Schildkröten = turtles + tortoises Creators: Booth Collection: Journal of Experimental Biology |
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| Abstract |
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Swimming effort and oxygen consumption of newly emerged green turtle Chelonia mydas hatchlings was measured simultaneously and continuously for the first 18 h of swimming after hatchlings entered the water. Oxygen consumption was tightly correlated to swimming effort during the first 12 h of swimming indicating that swimming is powered predominantly by aerobic metabolism. The patterns of swimming effort and oxygen consumption could be divided into three distinct phases: (1) the rapid fatigue phase from 0 to 2 h when the mean swim thrust decreased from 45 to 30 mN and oxygen consumption decreased from 33 to 18 ml h–1; (2) the slow fatigue phase from 2 to 12 h when the mean swim thrust decreased from 30 to 22 mN and oxygen consumption decreased from 18 to 10 ml h–1; and (3) the sustained effort phase from 12 to 18 h when mean swim thrust averaged 22 mN and oxygen consumption averaged 10 ml h–1. The decrease in mean swim thrust was caused by a combination of a decrease in front flipper stroke rate during a power stroking bout, a decrease in mean maximum thrust during a power stroking bout and a decrease in the proportion of time spent power stroking. Hence hatchlings maximise their swimming thrust as soon as they enter the water, a time when a fast swimming speed will maximise the chance of surviving the gauntlet of predators inhabiting the shallow fringing reef before reaching the relative safety of deeper water. Key words: aerobic metabolism, swimming, sea turtle, performance, oxygen consumption Added by: Sarina Wunderlich |
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Added by: Sarina Wunderlich |