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Polyandry in a marine turtle : females make the best of a bad job

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journal contribution
posted on 2004-01-01, 00:00 authored by Patricia LeePatricia Lee, Graeme HaysGraeme Hays
The female perspective on reproductive strategies remains one of the most active areas of debate in biology. Even though a single mating is often sufficient to satisfy the fertilization needs of most females and the act of further mating incurs costs, multiple paternity within broods or clutches is a common observation in nature. Direct or indirect advantage to females is the most popular explanation. However, the ubiquity of this explanation is being challenged by an increasing number of cases for which benefits are not evident. For the first time, we test possible fitness correlates of multiple paternity in a marine turtle, an organism that has long attracted attention in this area of research. Contrary to the wide-spread assumption that multiple mating by female marine turtles confers fitness benefits, none were apparent. In this study, the environment played a far stronger role in determining the success of clutches than whether paternity had been single or multiple. A more likely explanation for observations of multiply sired clutches in marine turtles is that these are successful outcomes of male coercion, where females have conceded to superfluous matings as a compromise. Thus, multiple matings by female marine turtles may be a form of damage control as females attempt to make the best of a bad job in response to male harassment.

History

Journal

Proceedings of the National Academy of Sciences of the United States of America

Volume

101

Issue

17

Pagination

6530 - 6536

Publisher

National Academy of Sciences

Location

Washington, D.C.

ISSN

0027-8424

eISSN

1091-6490

Language

eng

Publication classification

C1.1 Refereed article in a scholarly journal

Copyright notice

2004, National Academy of Sciences