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Different male vs. female breeding periodicity helps mitigate offspring sex ratio skews in sea turtles

Hays,GC, Mazaris,AD and Schofield,G 2014, Different male vs. female breeding periodicity helps mitigate offspring sex ratio skews in sea turtles, Frontiers in marine science, vol. 1, pp. 1-9, doi: 10.3389/fmars.2014.00043.

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Title Different male vs. female breeding periodicity helps mitigate offspring sex ratio skews in sea turtles
Author(s) Hays,GCORCID iD for Hays,GC orcid.org/0000-0002-3314-8189
Mazaris,AD
Schofield,GORCID iD for Schofield,G orcid.org/0000-0002-8438-4181
Journal name Frontiers in marine science
Volume number 1
Start page 1
End page 9
Publisher Frontiers Research Foundation
Place of publication Lausanne, Switzerland
Publication date 2014-09-19
ISSN 2296-7745
Summary  The implications of climate change for global biodiversity may be profound with those species with little capacity for adaptation being thought to be particularly vulnerable to warming. A classic case of groups for concern are those animals exhibiting temperature-dependent sex-determination (TSD), such as sea turtles, where climate warming may produce single sex populations and hence extinction. We show that, globally, female biased hatchling sex ratios dominate sea turtle populations (exceeding 3:1 in >50% records), which, at-a-glance, reiterates concerns for extinction. However, we also demonstrate that more frequent breeding by males, empirically shown by satellite tracking 23 individuals and supported by a generalized bio-energetic life history model, generates more balanced operational sex ratios (OSRs). Hence, concerns of increasingly skewed hatchling sex ratios and reduced population viability are less acute than previously thought for sea turtles. In fact, in some scenarios skewed hatchling sex ratios in groups with TSD may be adaptive to ensure optimum OSRs.
Language eng
DOI 10.3389/fmars.2014.00043
Field of Research 060299 Ecology not elsewhere classified
Socio Economic Objective 960808 Marine Flora
HERDC Research category C1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2014, Frontiers Research Foundation
Free to Read? Yes
Use Rights Creative Commons Attribution licence
Persistent URL http://hdl.handle.net/10536/DRO/DU:30071757

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Every reasonable effort has been made to ensure that permission has been obtained for items included in DRO. If you believe that your rights have been infringed by this repository, please contact drosupport@deakin.edu.au.