Wollerman, L.   1998.   Stabilizing and directional prefernces of female Hyla ebraccata for calls differing in static properties.   Animal Behaviour 55:   1619-1630.


Female frogs of many species show prefernces for calls with particular properties. This study focuses on female prefernces in Hyla ebraccata for computer-synthesized calls differeing in one of two call properties, pulse repetion rate or dominant frequncy. Both of these call properties are static acoustic properties of advertisement calls of H. ebraccata (within-male CV less than 5%).

Females exert directional selection on dominant frequency. They preferred low frequency calls (2960 Hz) to

calls with the dominant frequency of the population median (3240 Hz). Because size is negatively correlated with dominant frequency, female choice could explain size-biased mating success observed in natural populations. Females exerted stabilizing selection on pulse repetition rate. They preferred calls with the population median pulse repetion rate (99 Hz) to calls with a pulse repetition rate that was twice as fast (200 Hz).

Female choice creates either directional or stabilizing selection on static properties of calls.

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