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Distributional patterns of adult male loggerhead sea turtles (<Emphasis Type="Italic">Caretta caretta</Emphasis>) in the vicinity of Cape Canaveral,Florida, USA during and after a major annual breeding aggregation
Authors:Michael D Arendt  Albert L Segars  Julia I Byrd  Jessica Boynton  J David Whitaker  Lindsey Parker  David W Owens  Gaëlle Blanvillain  Joseph M Quattro  Mark A Roberts
Institution:(1) Marine Resources Division, South Carolina Department of Natural Resources, 217 Fort Johnson Road, Charleston, SC 29412, USA;(2) Marine Extension Service, University of Georgia, 715 Bay Street, Brunswick, GA 31520, USA;(3) Grice Marine Laboratory, College of Charleston, 205 Fort Johnson Road, Charleston, SC 29412, USA;(4) Department of Biological Sciences, University of South Carolina, 715 Sumter Street, Columbia, SC 29208, USA
Abstract:Satellite transmitters were attached to 25 reproductively active and four inactive adult male loggerhead sea turtles (86.6–107.0 cm SCLmin) captured from the Port Canaveral, FL, USA shipping channel to assess horizontal and vertical distributions. During the breeding period, male loggerheads aggregated (44% of 755 turtle days) in a 117.6 km2 core area that encompassed the shipping channel. Median dive duration during the breeding period was 27 min (IQR = 15–42 min) and males spent 4% (IQR = 3–5%) of the time at the surface, with significantly shorter dives associated with reproductively active males. Migrant and resident males dispersed concurrently, with residents shifting > 30 km east across the continental shelf over a more protracted departure schedule than migrants. Dive duration and time spent at the surface increased through the fall. Cluster analysis revealed the strongest association for dive duration with sea state during and after the breeding period, with significantly longer dives during more turbulent conditions. In contrast, univariate associations with surface interval duration were not elucidated.
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