Document Type

Article

Publication Date

Fall 9-28-2012

Publication Source

Endangered Species Research

Volume

18

Inclusive pages

233–245

DOI

10.3354/esr00451

Publisher

Inter-Research

Place of Publication

www.int-res.com

Peer Reviewed

yes

Abstract

Satellite telemetry has helped reveal migratory movements of sea turtles. We attached satellite transmitters (MK10 Pat Tags) to 10 post-nesting East Pacific green turtles Chelonia mydas from Nombre de Jesús, Costa Rica (in 2006, 2007 and 2009) to track their movements, identify their foraging grounds, and elucidate their foraging behavior. Location data were analyzed by applying a switching state-space model to obtain daily position estimates and to differentiate between 2 behavioral modes (migrating and foraging). All post-nesting movements were along coastal routes ranging up to 1086 km from the nesting beach. Of the 10 turtles, 6 remained local residents of Costa Rica foraging in the Gulf of Papagayo (N = 2) and the Gulf of Santa Elena (N = 4). One individual moved southwards to the Gulf of Panama, and 3 other turtles migrated northwards to waters off the Gulf of Fonseca in northern Nicaragua, with one continuing its foraging movements northwards to coastal Guatemala. Home ranges during foraging varied widely among individuals, and the calculated size of feeding grounds ranged from 315 to 18 335 km 2, the latter being the largest reported for this species. The fact that members of this nesting population inhabit coastal waters makes them vulnerable to human activities along the coasts of Central America. Our findings highlight the importance of Costa Rica and the coastal waters of Central America for the survival of the Endangered Costa Rican green turtles.

Keywords

East Pacific green turtle, Chelonia mydas, Migration, Costa Rica, Foraging grounds, Satellite telemetry, Switching state-space model, Black turtle

Disciplines

Animal Sciences | Biology | Ecology and Evolutionary Biology | Marine Biology | Other Life Sciences | Physiology | Population Biology | Zoology

 
 

Link to Original Published Item

doi: 10.3354/esr00451