Function of pipistrelle social calls: field data and a playback experiment

Article Abstract:

The function of social calls produced by feeding bats of two phonic types of Pipistrellus pipistrellus was investigated by analyzing data gathered from a foraging site and by playback experiments. Results indicated that social calls are used to repel, rather than to invite, other bats of the same phonic types when food source is scarce. Moreover, results suggested that there is resource partitioning between phonic types because there is no evidence of communication between them.

Social aspects, Bats, Bats (Animals), Animal behavior, Sound production by animals, Animal vocalizations, Animal sounds

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Why do female Gunnison's prairie dogs copulate with more than one male?

Article Abstract:

Multiple mating improves the reproductive success in Gunnison's prairie dogs, Cynomys gunnisoni. At the conclusion of a seven-year investigation, it was determined that females who copulated less than three times with different partners had only a 92% chance of pregnancy and parturition. On the other hand, females who copulated at least three times had a 100% probability of breeding successfully.

Sexual behavior, Sexual behavior in animals, Animal sexual behavior, Prairie dogs

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