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Fidelity to foraging sites after long migrations

journal contribution
posted on 2020-04-01, 00:00 authored by Takahiro Shimada, Colin J Limpus, Mark Hamann, Ian Bell, Nicole Esteban, Rachel Groom, Graeme HaysGraeme Hays
Patterns of animal movement associated with foraging lie at the heart of many ecological studies and often animals face decisions of staying in an environment they know, versus relocating to new sites. The lack of knowledge of new foraging sites means there is risk associated with a decision to relocate (e.g. poor foraging) as well as a potential benefit (e.g. improved foraging). Using a unique long‐term satellite tracking dataset for several sea turtle species, combined with capture‐mark‐recapture (CMR) data extending over 50 years, we show how, across species, individuals generally maintain tight fidelity to specific foraging sites after extended (up to almost 10,000 km) migration to and from distant breeding sites as well as across many decades. Migrating individuals often travelled through suitable foraging areas en route to their “home” site and so extended their journeys to maintain foraging site fidelity. We explore the likely mechanistic underpinnings of this trait, which is also seen in some migrating birds, and suggest that individuals will forgo areas of suitable forage encountered en route during migration when they have poor knowledge of the long‐term suitability of those sites, making relocation to those sites risky.

History

Journal

Journal of animal ecology

Volume

89

Pagination

1008-1016

Location

Chichester, Eng.

ISSN

0021-8790

eISSN

1365-2656

Language

eng

Publication classification

C1 Refereed article in a scholarly journal

Issue

4

Publisher

Wiley

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