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Natal foraging philopatry in eastern Pacific hawksbill turtles
Alexander R Gaos1,2,3,4, Rebecca L Lewison1, Michael P Jensen3
1Department of Biology, San Diego State University, San Diego, CA, USA.
Royal Society Open Science
|September 8, 2017
Summary
Juvenile hawksbill turtles exhibit natal foraging philopatry, returning to areas near their birth beaches to feed. This challenges traditional views, showing marine turtles use natal homing for foraging, not just reproduction.
Area of Science:
- Marine Biology
- Animal Behavior
- Conservation Genetics
Background:
- Animal migration and marine turtle movement patterns are complex and not fully understood.
- Natal homing for reproduction in mature marine turtles is accepted, but philopatry during other life stages is less studied.
Purpose of the Study:
- To investigate the role of natal philopatry in juvenile marine turtles.
- To determine if juvenile hawksbill turtles utilize foraging grounds near their natal areas.
Main Methods:
- Genetic research was employed to track juvenile hawksbill turtles (Eretmochelys imbricata).
- Analysis focused on movement patterns and foraging grounds relative to natal origins in the eastern Pacific Ocean.
Main Results:
- Genetic data revealed that juvenile hawksbill turtles forage in regions near their natal beaches.
- This behavior is termed 'natal foraging philopatry'.
Conclusions:
- Traditional understanding of natal homing solely for reproduction is incomplete for marine turtles.
- Many marine turtle species likely exhibit philopatry to natal areas for foraging, with implications for conservation and life-history research.
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