A trial was carried out to evaluate the effect of age, sex and genotype on productive performnce and data of slaughter of rabbits obtained crossing hybrid does with males of two different pire-breeds: Burgundy Fawn and New Zealand White. One hundred and sixty-five growing rabbits, weaned at 31-32 days old and caged in colony, were used in the trial performed during autumn-winter. Individual live weights were recorded weekly and starting from the age of 74 day twenty four rabbits (12 Burgundy Fawn offspring and 12 New Zealand White offspring) were slaughtered weekly. In the Burgundy Fawn offspring the carcass rates were higher than in the NZW ones mainly due to a lower skin percentage, a higher hind legs incidence and a lower carcasses fatness of the Burgundy Fawn crossbred in respect to the NZW one. Feed conversion efficiency did not differ between rabbits even if it was lower in the Burgundy Fawn offspring than in the NZW ones, at all the tested ages. Age markedly affected the productive performances , the slaughter data and the growth of organs and apparatus. The tested rabbits seem to fit to earlier slaughter.
Effetto dell'età di macellazione e del sesso su incroci provenienti da maschi di razze cunicole diverse. Prestazioni produttive e caratteristiche quanti-qualitative della carcassa
PACI, GISELLA;MARZONI FECIA DI COSSATO, MARGHERITA;PREZIUSO, GIOVANNA;
1995-01-01
Abstract
A trial was carried out to evaluate the effect of age, sex and genotype on productive performnce and data of slaughter of rabbits obtained crossing hybrid does with males of two different pire-breeds: Burgundy Fawn and New Zealand White. One hundred and sixty-five growing rabbits, weaned at 31-32 days old and caged in colony, were used in the trial performed during autumn-winter. Individual live weights were recorded weekly and starting from the age of 74 day twenty four rabbits (12 Burgundy Fawn offspring and 12 New Zealand White offspring) were slaughtered weekly. In the Burgundy Fawn offspring the carcass rates were higher than in the NZW ones mainly due to a lower skin percentage, a higher hind legs incidence and a lower carcasses fatness of the Burgundy Fawn crossbred in respect to the NZW one. Feed conversion efficiency did not differ between rabbits even if it was lower in the Burgundy Fawn offspring than in the NZW ones, at all the tested ages. Age markedly affected the productive performances , the slaughter data and the growth of organs and apparatus. The tested rabbits seem to fit to earlier slaughter.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
