Deceptive or honest signalling of fighting ability? A test of alternative hypotheses for the function of changes in call dominant frequency by male cricket frogs

Article Abstract:

The functional significance of changes in call dominant frequency during cricket frog contests were studied using synthetic advertisement calls differing in dominant frequency. Males that lower their dominant frequency repel more opponents than males that do not lower their dominant frequency. There is a weak correlation between size and call dominant frequency but a positive correlation exists between males that lower their dominant frequency and aggression. Thus, male cricket frogs signal their size through the initial call dominant frequency while other information on their fighting ability are signaled through changes in call dominant frequency.

Frogs, Aggressive behavior in animals, Animal aggression, Animal sounds

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Nutritional effects on male calling behaviour in the variable field cricket

Article Abstract:

A study was conducted to investigate the effects of nutrition on chirp rate and chirp duration of male variable field crickets. The differences in male calling behavior of crickets on high- and low-nutrition regime were observed. Results of the study indicate that the two feeding regimes did not affect the male crickets' weight. However, it was observed that the male crickets on high-feeding regime chirped more often and called at higher chip rates. Thus, they are more attractive to female variable field crickets which prefer mates that have frequent and longer calling songs.

Animal behavior, Crickets, Social behavior in animals, Animal social behavior

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Measuring female mating preferences

Article Abstract:

The current practices for evaluating female preferences may sometimes be insufficient if the goal is to elucidate on how selection acts on female choices rather than how female preferences cause selection on male traits. Moreover, repeated assessments of female choice functions enable researchers to gather data regarding female preferences required to study selection on preferences. Preference functions offer more complete data on the form of female preferences than it is possible to gather from typical choice tests.

Courtship of animals, Mating behavior

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