Title |
Forelimb preferences in quadrupedal marsupials and their implications for laterality evolution in mammals
|
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Published in |
BMC Ecology and Evolution, March 2013
|
DOI | 10.1186/1471-2148-13-61 |
Pubmed ID | |
Authors |
Andrey Giljov, Karina Karenina, Yegor Malashichev |
Abstract |
Acquisition of upright posture in evolution has been argued to facilitate manual laterality in primates. Owing to the high variety of postural habits marsupials can serve as a suitable model to test whether the species-typical body posture shapes forelimb preferences in non-primates or this phenomenon emerged only in the course of primate evolution. In the present study we aimed to explore manual laterality in marsupial quadrupeds and compare them with the results in the previously studied bipedal species. Forelimb preferences were assessed in captive grey short-tailed opossum (Monodelphis domestica) and sugar glider (Petaurus breviceps) in four different types of unimanual behaviour per species, which was not artificially evoked. We examined the possible effects of sex, age and task, because these factors have been reported to affect motor laterality in placental mammals. |
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