Chipmunks were released either 10 or 100 m from their burrow and chased by an experimenter to simulate a terrestrial predator. To examine the adaptive significance of this vocalization, we assessed the effects of sex, age, and distance from the burrow on the occurrence of the call. N2 - The trill vocalization is given by eastern chipmunks (Tamias striatus) when being pursued by a predator. We attributed sex, age, and location differences in giving the trill vocalization to the effects of kin selection on antipredator behavior.", Juvenile females only trilled when released 10 m from their burrows (45% of 11 chases), and juvenile males did not trill at all. Adult females trilled more than adult males when released 10 m from their burrow (67% compared with 45%) but less than males when released 100 m from their burrow (14% compared with 55%). Adult males, on the other hand, showed no significant difference in their probability of trilling based on the distance from their burrows (45% of 20 chases at 10 m and 55% of 20 chases at 100 m). We found that adult females trill more often when released 10 m from their burrow (67% of 24 chases) than when released 100 m from their burrow (14% of 21 chases). We attributed sex, age, and location differences in giving the trill vocalization to the effects of kin selection on antipredator behavior.Ībstract = "The trill vocalization is given by eastern chipmunks (Tamias striatus) when being pursued by a predator.
The trill vocalization is given by eastern chipmunks (Tamias striatus) when being pursued by a predator.
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