Plasticity of aggressive thresholds in Hyla regilla: discrete accommodation to encounter calls
Article Abstract:
The plasticity of the aggressive advertisement calls of male Pacific treefrogs, Hyla regilla, was analyzed via general playback methods. Analysis of vocal interaction in natural populations of male Pacific tree frogs indicated rapid accommodation of frogs to playbacks of encounter calls that are above their aggressive thresholds. Furthermore, the duration of accommodation to playbacks of male aggressive responses was similar to advertisement calls.
Publication Name: Animal Behaviour
Subject: Zoology and wildlife conservation
ISSN: 0003-3472
Year: 1997
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Desperately concealing father: a theory of parent-infant resemblance
Article Abstract:
A simple population genetics model was developed and tested to explain why infants do not resemble their parents. Results suggested that an infant's appearance is an adaptive strategy for concealing the identity of its parents, specially of its father. Paternal neglect, abuse and infanticide can be avoided by concealing paternal identity when the domestic father is not the biological father.
Publication Name: Animal Behaviour
Subject: Zoology and wildlife conservation
ISSN: 0003-3472
Year: 1997
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