Evol Ecol Res 7: 1039-1050 (2005)     Full PDF if your library subscribes.

Male adaptive stupidity: male mating pattern in hybridogenetic frogs

Dirk Sven Schmeller,1* Robert O’Hara2 and Hanna Kokko3

1Ecologie des Hydrosystèmes Fluviaux, Université Claude Bernard, Bât Darwin C, 43 Boulevard du 11 Novembre 1918, 69622 Villeurbanne Cedex, France,  2Department of Mathematics and Statistics and  3Laboratory of Ecological and Evolutionary Dynamics, Department of Biological and Environmental Sciences, University of Helsinki, FIN-00014 Helsinki, Finland

Author to whom all correspondence should be addressed.
e-mail: dirk@die-schmellers.de


Question: Why do male frogs invest in heterospecific matings in hybridogenetic systems with large heterospecific and small conspecific females? When is a strategy to mate with larger females evolutionarily stable?

Mathematical method: A continuous-time model of reproductive values with discrete classes of individuals is developed to investigate the balance between two strong selective pressures: large conspecific females are the best mates, but large females are also more likely to be heterospecific.

Key assumption: Males can detect female size, but are unable to distinguish between conspecific and heterospecific females. Matings incur time costs and the mating season is limited. Therefore, males of the small parental species should evolve to ignore heterospecific females.

Conclusion: The results indicate that direct benefits of male mate choice within conspecifics can counteract the selective pressure to avoid large females as mates. This trade-off can balance out in a way that makes indiscriminate mating adaptive.

Keywords: adaptive decision, hybridogenesis, interspecies conflict, mating behaviour, mating strategy.

IF you are connected using the IP of a subscribing institution (library, laboratory, etc.)
or through its VPN.


        © 2005 Dirk Sven Schmeller. All EER articles are copyrighted by their authors. All authors endorse, permit and license Evolutionary Ecology Ltd. to grant its subscribing institutions/libraries the copying privileges specified below without additional consideration or payment to them or to Evolutionary Ecology, Ltd. These endorsements, in writing, are on file in the office of Evolutionary Ecology, Ltd. Consult authors for permission to use any portion of their work in derivative works, compilations or to distribute their work in any commercial manner.

       Subscribing institutions/libraries may grant individuals the privilege of making a single copy of an EER article for non-commercial educational or non-commercial research purposes. Subscribing institutions/libraries may also use articles for non-commercial educational purposes by making any number of copies for course packs or course reserve collections. Subscribing institutions/libraries may also loan single copies of articles to non-commercial libraries for educational purposes.

       All copies of abstracts and articles must preserve their copyright notice without modification.