ESR 3:283-293(2007) - doi: 10.3354/esr00054
Trends in catch rates of sea turtles in North Carolina, USA
Sheryan P. Epperly1,*, Joanne Braun-McNeill2, Paul M. Richards1
ABSTRACT: Sea turtles captured in pound nets during the autumn and early winter in the Pamlico-Albermarle Estuarine Complex, North Carolina, USA, were sampled 19951997 and 20012003 to monitor trends in catch rates during their autumn emigration from the temperate sounds. Juvenile loggerhead turtles Caretta caretta were the most frequent species encountered, followed by green turtles Chelonia mydas and Kemps ridley turtles Lepidochelys kempii. Several different subpopulations with origins throughout the western North Atlantic were represented on these foraging grounds. The catch rates of loggerhead turtles increased significantly at a rate of 13% yr1. Despite annual increases in the major contributing nesting beach populations in excess of 10% yr1, we did not detect a trend in catch rates for either green or Kemps ridley turtles, perhaps due to low statistical power. There was a significant increase in size of loggerhead turtles over time. We also detected a significant difference in annual size distributions of green and Kemps ridley sea turtles, but there was no discernable pattern. We conclude that long-term studies on the sea turtles foraging grounds, at multiple sites, are needed to monitor the status of sea turtle populations.
KEY WORDS: Sea turtles · Caretta · Chelonia · Lepidochelys · Catch rates · Trends
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