PMID: 9419881Jan 7, 1998Paper

Maternal presence and rearing condition affect responses to a live predator in kangaroo rats (Dipodomys heermanni arenae)

Journal of Comparative Psychology
S I Yoerg, D M Shier

Abstract

Experiment 1 compared the responses of wild-caught adult and captive-born adult and juvenile kangaroo rats (Dipodomys heermanni arenae) to a live snake. Wild-caught adult rats were less active and monitored the snake more than during a control condition; captive-born juvenile rats did not behave differently during snake and control tests. Snake-naive adult rats behaved more like the wild-caught adult rats, but not on all measures. In Experiment 2, pups were tested at 25 and 50 days of age in 4 conditions: no-snake control, alone with the snake, with a sibling and the snake, and with the mother and the snake. Pups did not behave differently during control and snake tests, but during tests with the mother, pups faced the snake less and followed the mother. Younger pups were more often near the mother than a sibling and followed the mother more when the snake was present. Development of defensive behavior may depend on both predator experience and maternal influence.

Citations

Jan 14, 2004·Journal of Comparative Psychology·Michael B HennessyDeborah S Maken
Feb 4, 2005·Developmental Psychobiology·Marie-Annick Richard-YrisAline Bertin

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