Summary
Sibling recognition by spiny mice (Acomys cahirinus) was investigated by housing groups consisting of two pairs of littermates together and recording frequency of dyadic pairing. A total of 136 animals (68 pairs of siblings) were tested in three experiments. Sibling pairs were observed more often than pairings between nonsiblings; however, such preferences were no longer evident if the nonsiblings were exposed to one another prior to testing. Animals made anosmic through zinc sulfate treatment did not differ on their frequencies of sibling vs. nonsibling pairing and showed a higher incidence of group huddling (by all four animals) than did intact controls. Weanling A. cahirinus appear to be able to recognize (i.e., are attracted to) their littermate siblings through olfactory cues, which seems to be a modifiable attraction to odors to which the littermates were exposed rather than an irreversible imprinting-like process.
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The research project reported herein was supported by grant # 00973 from NICHD
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Porter, R.H., Wyrick, M. & Pankey, J. Sibling recognition in spiny mice (Acomys cahirinus). Behav Ecol Sociobiol 3, 61–68 (1978). https://doi.org/10.1007/BF00300046
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DOI: https://doi.org/10.1007/BF00300046