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1 February 2006 AGE-RELATED BODY MASS AND REPRODUCTIVE MEASUREMENTS OF GRAY WOLVES IN MINNESOTA
L. David Mech
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Abstract

Based on 65 free-ranging gray wolves (Canis lupus) of known age and 25 of estimated age examined during summers of 1970–2004 in northeastern Minnesota, body mass of both males and females peaked at 5 or 6 years of age, with mean masses of 40.8 kg and 31.2 kg, respectively. Testis size varied as a function of age and month through at least 8 years of age, with length plus width ranging from 1.9 to 7.8 cm. Most females aged 4–9 years bred based on assessment of nipple sizes; those that had not bred had average lower body mass than those that had. This is the 1st report of such data from known-aged wolves.

L. David Mech "AGE-RELATED BODY MASS AND REPRODUCTIVE MEASUREMENTS OF GRAY WOLVES IN MINNESOTA," Journal of Mammalogy 87(1), 80-84, (1 February 2006). https://doi.org/10.1644/05-MAMM-F-212R1.1
Accepted: 1 August 2005; Published: 1 February 2006
KEYWORDS
body mass
Canis lupus
development
gray wolf
growth
nipples
reproduction
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