The performance of 48 Ile de France lambs, averaging 32kg body weight, raised on organic and conventional models from birth to slaughter age, was evaluated. Birth weight, weaning weight, body weight, slaughter body weight, birth to weaning age, dry matter intake, and body weight gain were not influenced by the (P>0.05) by the production models. However, weaning to slaughter age and birth to slaughter age were influenced (P<0.05) by the production models. Body weight, slaughter body weight, empty body weight, hot and cold weights, hot and cold carcass dressing percentages, and cooling and fasting losses were not influenced (P>0.05) by the production models. Lambs raised under conventional model reached slaughter weight in shorter time, so their performance and economical parameters would be more favorable and advantageous for the producer.
carcass; lambs; weight body gain; organic model; conventional model
