Warm water and cool nests are best. How global warming might influence hatchling green turtle swimming performance

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Abstract

For sea turtles nesting on beaches surrounded by coral reefs, the most important element of hatchling recruitment is escaping predation by fish as they swim across the fringing reef, and as a consequence hatchlings that minimize their exposure to fish predation by minimizing the time spent crossing the fringing reef have a greater chance of surviving the reef crossing. One way to decrease the time required to cross the fringing reef is to maximize swimming speed. We found that both water temperature and nest temperature influence swimming performance of hatchling green turtles, but in opposite directions. Warm water increases swimming ability, with hatchling turtles swimming in warm water having a faster stroke rate, while an increase in nest temperature decreases swimming ability with hatchlings from warm nests producing less thrust per stroke.

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Booth, D. T., & Evans, A. (2011). Warm water and cool nests are best. How global warming might influence hatchling green turtle swimming performance. PLoS ONE, 6(8). https://doi.org/10.1371/journal.pone.0023162

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