Growth and carcass composition of local Iraqi black goats

الملخص EN

The pattern of growth and carcass composition of indigenous Iraqi black goats were assessed through serial slaughter and carcass dissection of 36 kids at six different growth phases.

The general linear model procedure and allometric growth ‘equations were used to assess the effects of various factors and differential growth of carcass components, ' respectively.

Results showed that kids growth and carcass composition were significantly (P< 0-05 to P< O-O01) affected by the growth phase and sex of kids.

The effects of growth phase clearly showed that slower growth of the body and of carcass components were observed during the third phase (i.e.

after weaning).

Although there was an effect on fat to lean ratios (P _ < 005), growth phase had no significant effect on dressing out proportion, and lean to bone ratios.

A significant influence of sex (P < 0-O5) "was observed on lean to bone ratios.

The log/log regression of weights of dissectible carcass components on hot carcass and empty body weight showed that the differential growth of bone was declining and that of lean was isometric relative to the growth of empty body weight.

For carcass fat, the allometric growth coefficients (b) of 1.6 indicated that fat is a late maturing body component.

Moreover the growth of carcass fat relative to empty body weight in local goat was slower than that reported for other goat breeds