Evol Ecol Res 9: 395-408 (2007)     Full PDF if your library subscribes.

ESS distribution of display duration in animal contests to assess an opponent before fighting or fleeing

Takashi Uehara,1 Yoh Iwasa1* and Hisashi Ohtsuki1,2

1Department of Biology, Faculty of Sciences, Kyushu University, Fukuoka 812-8581, Japan and  2Program for Evolutionary Dynamics, Harvard University, Cambridge, MA 02138, USA

Author to whom all correspondence should be addressed.
e-mail: yiwasscb@mbox.nc.kyushu-u.ac.jp


Questions: What determines the duration of conventional display in animal contests?

Mathematical method: Evolutionarily stable probability distribution of display duration is calculated mathematically.

Key assumptions: Display lasts until one of the contestants chooses to fight or flee. The outcome of fighting between two contestants is determined by their relative strength, which is unknown at the beginning but becomes more and more apparent to both contestants with time.

Conclusions: The ESS population may include individuals with very different display durations. The more valuable the contested resource and the greater the cost of losing a contest, the longer the display lasts. Animals that assess their opponents with very high or very low efficiency will engage in shorter displays than animals with intermediate assessment efficiency.

Keywords: assessment, contest behaviour, display duration, evolutionarily stable state.

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


        © 2007 Yoh Iwasa. 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.