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Sex differentiation in postnatal growth rate: a test in a wild boar population
J -M Gaillard1, D Pontier2, S Brandt3
1Department of Zoology and Physiology, University of Wyoming, P.O. Box 3166, 82071, Laramie, WY, USA.
Abstract:
In wild boar individual growth rate is linear between 0.5 and 6 months after birth, based on successive body weight measurements. Contrary to expectation for a dimorphic and polygynous mammal like wild boar, no sexual dimorphism in growth rate could be detected between 0.5 and 6 months. We argue that high total maternal invesment in offspring due to large litter size and/or strong selection for early reproduction in this population with a short generation time could explain this absence of early differentiation in postnatal growth rate according to offspring sex.
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