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Effect of sex and season of birth on Gompertz growth curve parameters in “Nero di Parma” pigs

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Author(s): Alberto Sabbioni | Valentino Beretti | Raffaele Manini | Claudio Cervi | Paola Superchi

Journal: Italian Journal of Animal Science
ISSN 1594-4077

Volume: 8;
Issue: 4;
Start page: 719;
Date: 2010;
Original page

Keywords: Pig | Nero di Parma | Growth | Gompertz model.

ABSTRACT
The growth curves of “Nero di Parma” pigs were studied by applying the Gompertz equation to 1069 body weight (BW) records from 285 pigs (156 females, 129 castrated males) born in 11 outdoor and 5 indoor herds; pigs were fed commercial complete feeds offered ad libitum and, on a limited basis in the outdoor system, diets were integrated with pasture. The parameters of the Gompertz equation were compared with reference to sex and season of birth. Mature BW for castrated males (229.0 kg) was 3.5% greater than that for females (221.3 kg) (P
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