Abstract
This study aims to evaluate the developmental trends and the allometric growth values of various body parts and fat depots of the most prevailing indigenous Saudi goat. Thirty male Ardhi kids were serially slaughtered at 10, 15, 20, 25, 30 and 35 kg live weight. As the kids grew, the bones of hind limb grew at slower rates than the bones of the forelimb and within each limb, the cannon bone grew relatively at a slower rate than the upper skeletal bones. The allometric coefficients for the growth of hot and cold carcass, liver, stomach compartments and lean relative to empty body weight were isogonic (b = 1.00), whereas coefficients of all internal fat depots, intermuscular and subcutaneous fat weights were heterogonic with the high growth impetus of b values greater than 1.00 (p<0.01). The developmental rates of the intestines and separated bones from cold carcass side were heterogonic with medium growth impetus. These results, showed that the highest growth coefficients were obtained for omental and perirenal fat indicating the late maturing characteristics of these depots, followed in a decreasing order by mesenteric and intermuscular fat, channel fat and finally subcutaneous and pericardial fat, which were the earliest developing depots.
Highlights
Within the expanding Saudi Arabian meat production enterprises, increasing emphasis is being placed on the importance of goat production in the overall economic viability of agribusiness industries; it provides the markets with 15.5 thousand tons of meat annually representing over 10% of total indigenous red meat production (FAO, 2010)
As the goat kids grew from 10 to 35 kg (Table 1), tract was separated into stomach compartments and the weights of empty body, hot and cold carcass, liver, intestines
Carcasses were chilled at 4°C for 24 h and the cold carcass weights were recorded; thereafter, the carcasses were carefully split longitudinally into two equal halves along the dorsal mid line and the right sides were utilized for subsequent measurements
Summary
Within the expanding Saudi Arabian meat production enterprises, increasing emphasis is being placed on the importance of goat production in the overall economic viability of agribusiness industries; it provides the markets with 15.5 thousand tons of meat annually representing over 10% of total indigenous red meat production (FAO, 2010). Kids are raised by their mothers and slaughtered at 10-15 kg live weight to produce light carcasses (El-Waziry et al, 2011). The pattern of developmental growth and distribution of carcass tissues within the goat body has its own vital physiological significance and it is an area demanding extensive investigations. Several studies have shown that the partitioning of body components is influenced by slaughter weight (Bonvillani et al, 2010). Partition and growth of tissues should be determined for each breed. In Saudi Arabia, Ardhi goat is the most widely distributed indigenous breed in the central and northern areas. There is a dearth of published information on carcass composition from Ardhi goat. This study attempts to define the development and distribution of carcass and non-carcass components in Ardhi male goat kids slaughtered at different weights
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