engleski

Asymmetric S-function in the prediction of growth characteristics of hybrid pigs

The present study was carried out on 47 barrows equally distributed into two different feeding groups (intensive and restricted). MR tomography was used to obtain the data needed for calculation of optimal slaughter weight. Growth analyses and predictions were performed using asymmetric S- function. Feeding regime had significant effect on the growth of live weight and fat volume (p<0.05) ; the influence on muscle volume growth was not detected (p>0.05). The optimal slaughter weight in the sense of maximal utilisation of the muscle growth was 130 kg in the case of intensively fed pigs ; and 114 kg in the case of restrictive feeding. The power of prediction of the established models was satisfactory. The accuracy of live weight prediction at the age of 154 days was lower in the intensively fed pigs (error ~6 days on average) than in the restrictive group of pigs (error ~4 days on average). Since average divergence from actual live weights was less than one week, the models could be considered fairly accurate.

pigs ; growth ; non-linear models ; prediction

Rad je kao predavanje prezentiran na skupu 16th International Symposium Animal Science Days, održanom od 17.-19.09.2008., Strunjan, Slovenija.