Wild boars shot in a hunting area in BadenWürttemberg during three consecutive years (148 males, 205 females) were analysed for insulin-like growth factor 1 (IGF-I) concentrations in blood plasma. Gonadal steroids were determined either in blood plasma (females, progesterone) or adipose tissue (males, androstenone). The age (estimated by the dental pattern) and the carcass weight were recorded. From 159 out of the 353 animals, the stomach content was analysed for total energy and digestibility. Sex differences in carcass weight were only significant in animals above the age of 14 months. Carcass weight was significantly correlated with IGF-
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