Temporal call changes and prior experience affect graded signalling in the cricket frog

Article Abstract:

The advertisement calls of male cricket frogs varies according to whether they are responding to synthetic calls desgined to be 'aggressive' or 'attractive'. Male frogs respond more agressively to aggressive calls. The difference between the types of call was temporal rather than spectral. The order of the calls affected the frogs' behavior, and if the initial call was agressive, the frog was more likely to be aggressive. but this was less true if the initial call was attractive, in which case the frog could make the same response to both stimuli.

Aggressive behavior in animals, Animal aggression, Animal behavior

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Evoked vocal response in male tungara frogs: pre-existing biases in male responses?

Article Abstract:

Sexual differences in responses to signal variation in male tungara frogs, Physalaemus pustulous, were investigated using evoked response as a bioassay. A whine-chuck was found to evoke greater response from males than a simple whine. Both male and female display enhanced responsiveness when a variety of artificial and heterospecific stimuli were added to the conspecific whine. These findings suggest that both sexes have a bias towards enhanced response to call complexity that is more general than response towards the whine plus chucks.

Sexual behavior, Sexual behavior in animals, Animal sexual behavior, Physalaemus pustulosus, Tungara frog

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Patterns of advertisement call evolution in toads and chorus frogs

Article Abstract:

An analysis of the mating calls of two groups of anuran amphibians, the Bufo and the Pseudacris, revealed differences in their call characteristics. The study of the acoustic characters and sound production showed that female bufonids preferred longer and faster call rates, while calls of female hylids were characterized by rapid changes in frequency modulation. The results suggest that call patterns of the two groups can be used as basis for studying their evolution.

Evolution (Biology), Amphibians, Animal sounds

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