Ontogenetic development of migration: Lagrangian drift trajectories suggest a new paradigm for sea turtles.
Long distance migration occurs in a wide variety of taxa including birds, insects, fishes, mammals and reptiles. Here, we provide evidence for a new paradigm for the determinants of migration destination. As adults, sea turtles show fidelity to their natal nesting areas and then at the end of the breeding season may migrate to distant foraging sites. For a major rookery in the Mediterranean, we simulated hatchling drift by releasing 288 000 numerical particles in an area close to the nesting beaches. We show that the pattern of adult dispersion from the breeding area reflects the extent of passive dispersion that would be experienced by hatchlings. Hence, the prevailing oceanography around nesting areas may be crucial to the selection of foraging sites used by adult sea turtles. This environmental forcing may allow the rapid evolution of new migration destinations if ocean currents alter with climate change.
Institute of Environmental Sustainability, Swansea University, , Singleton Park, Swansea SA2 8PP, UK. g.hays@swan.ac.uk
Graeme C
GC
Hays
Sabrina
S
Fossette
Kostas A
KA
Katselidis
Patrizio
P
Mariani
Gail
G
Schofield
D025041:Animal Migration; D000818:Animals; D057231:Climate Change; D003198:Computer Simulation; D008962:Models, Theoretical; D009425:Nesting Behavior; D009792:Oceans and Seas; D014426:Turtles / Q000502:physiology*; D014872:Water Movements