Echolocation helps bats recognize each other

June 5th, 2009 - 12:59 pm ICT by ANI  

Washington, June 5 (ANI): Bats use echolocation not only to navigate their surroundings also to recognize each other, a study has found.

The study, by researchers at the University of Tuebingen, Germany, and the University of Applied Sciences in Konstanz, Germany, explains how bats use echolocation for more than just spatial knowledge.

For the study, researchers first tested the ability of four greater mouse-eared bats to distinguish between the echolocation calls of other bats.

After observing that the bats learned to discriminate the voices of other bats, they then programmed a computer model that reproduces the recognition behaviour of the bats.

Analysis of the model suggests that the spectral energy distribution in the signals contains individual-specific information that allows one bat to recognize another.

Animals must recognize each other in order to engage in social behaviour. Vocal communication signals are helpful for recognizing individuals, especially in nocturnal organisms such as bats.

Little is known about how bats perform strenuous social tasks, such as remaining in a group when flying at high speeds in darkness, or avoiding interference between echolocation calls.

According to researchers, the finding that bats can recognize other bats within their own species based on their echolocation calls may therefore have some significant implications.

The study is published June 5 in the open-access journal PLoS Computational Biology. (ANI)

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