Trends in catch rates of sea turtles in North Carolina, USA

[摘要] ABSTRACT: Sea turtles captured in pound nets during the autumn and early winter in the Pamlico-Albermarle Estuarine Complex, North Carolina, USA, were sampled 1995–1997 and 2001–2003 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 Kemp’s 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% yr^–1. Despite annual increases in the major contributing nesting beach populations in excess of 10% yr^–1, we did not detect a trend in catch rates for either green or Kemp’s 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 Kemp’s 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.

[学科分类] 动物科学

[关键词] Sea turtles;Caretta;Chelonia;Lepidochelys;Catch rates;Trends