Evol Ecol Res 4: 307-311 (2002)     Full PDF if your library subscribes.

The distraction hypothesis depends on relatively cheap extrafloral nectaries

Michael L. Rosenzweig*

Department of Ecology and Evolutionary Biology, University of Arizona, Tucson, AZ 85721-0088, USA

e-mail: scarab@u.arizona.edu


Extrafloral nectaries may have evolved because they distract insects from flowers. For this to have occurred, extrafloral nectaries must be cheaper than flowers. This requirement stands in addition to the requirement that extrafloral nectaries must reduce the rate of insect visits to flowers. In the model examined here, the cost of each extrafloral nectary divided by the cost of each flower must be less than the proportion of reproduction threatened by insect visits.

Keywords: extrafloral nectaries, Kerner hypothesis.

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        © 2002 Michael L. Rosenzweig. 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.

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