Captive breeding does not alter brain volume in a marsupial over a few generations.

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Abstract

Captive breeding followed by reintroduction to the wild is a common component of conservation management plans for various taxa. Although it is commonly used, captive breeding can result in morphological changes, including brain size decrease. Brain size reduction has been associated with behavioral changes in domestic animals, and such changes may negatively influence reintroduction success of captive-bred animals. Many marsupials are currently bred in captivity for reintroduction, yet the impacts of captive breeding on brain size have never been studied in this taxa. We investigated the impacts of a few generations (2-7) of captive breeding on brain volume in the stripe-faced dunnart (Sminthopsis macroura), and found that captive breeding in a relatively enriched environment did not cause any changes in brain volume. Nonetheless, we advocate that great care be taken to provide suitable husbandry conditions and to minimize the number of captive generations if marsupial reintroduction programs are to be successful. © 2011 Wiley Periodicals, Inc.

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Guay, P. J., Parrott, M., & Selwood, L. (2012). Captive breeding does not alter brain volume in a marsupial over a few generations. Zoo Biology, 31(1), 82–86. https://doi.org/10.1002/zoo.20393

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