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Reproduction in shark-attacked sea turtles is supported by stress-reduction mechanisms.

Version 2 2024-06-12, 14:41
Version 1 2017-05-03, 13:45
journal contribution
posted on 2024-06-12, 14:41 authored by T Jessop, J Sumner, V Lance, C Limpus
Vertebrates exhibit varied behavioural and physiological tactics to promote reproductive success. We examined mechanisms that could enable female loggerhead turtles to undertake nesting activities and maintain seasonal reproduction despite recent shark injuries of varying severity. We proposed that endocrinal mechanisms that regulate both a turtle's stress response and reproductive ability are modified to promote successful and continued reproduction. Irrespective of the degree of injury, females did not exhibit increased levels of the stress hormone corticosterone, nor decreased levels of the reproductive steroid testosterone; hormone responses consistent with stress. When exposed to a capture stressor, females with shark injury did not exhibit any greater corticosterone response than controls. In addition, breeding females showed a reduced corticosterone stress response compared to non-breeding females. Reduced endocrinal responses following shark injury, and during breeding in general may, in part, enable females to maintain behavioural and physiological commitment to reproduction.

History

Journal

Proceedings of the Royal Society B: Biological Sciences

Volume

271 Suppl 3

Article number

suppl_3

Pagination

S91-S94

Location

England

ISSN

0962-8452

Language

eng

Publication classification

CN.1 Other journal article

Copyright notice

2004, The Royal Society

Publisher

Royal Society, The

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