Maternal Investment in Captive Giraffes

Author(s)Fred B. Bercovitch, Meredttih J. Bashaw, Carmi G. Penny and Randy G. Rieches
Year Published2004
JournalJournal of Mammalogy
Page Numbers428-431
Size997.72 KB

Sex-biased maternal investment involves differential allocation of resources to production and rearing of sons or daughters as a function of their anticipated reproductive output. We examined reproductive investment among captive giraffe, (Giraffa camelopardalis) over a 21-year period to determine extent to which female invest differentially in offspring by sex. We found an unbiased sex ratio at birth and comparable interbirth intervals following rearing of either sons or daughters. Early neonatal mortality compressed interbirth interval and females probably conceived while lactating. We suggest that females invest equally in son and daughters because males surpass females in size subsequent to the period of infant dependency.

Keywords: Giraffe, Interbirth interval, Maternal investment, Reproductive strategies, Sex ratio

Authors: Fred B. Bercovitch, Meredttih J. Bashaw, Carmi G. Penny and Randy G. Rieches

Journal: Journal of Mammalogy


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