The fatty acid composition of muscle and adipose tissues from entire and castrated male Boer goats raised in Australia

Abstract

The fatty acid composition of longissimus thoracis (LT) muscle and adipose tissues (subcutaneous and intermuscular fat) from castrated and entire male Boer goat bucks was investigated. Sixty Boer bucks in groups of between three and five animals were slaughtered at 5, 15, 30, 45, 60, 75, 90 and 105 kg live weight (5 and 15 kg animals were not castrated). The fatty acid composition of LT muscle from castrated and entire Boers was significantly affected by slaughter weight. The fatty acid content ofLT muscle and subcutaneous and intermuscular fat from both castrated and entire Boer bucks was primarily composed of oleic acid followed by palmitic and stearic acid. Both oleic and palmitic acid increased with slaughter weight whereas stearic acid decreased. LT muscle from castrated Boer bucks contained higher amounts of desirable fatty acids. In contrast to slaughter weight, castration of Boer bucks resulted in only minor changes in fatty acid composition of adipose tissues. It can be concluded that slaughter weight plays a role in changing the fatty acid composition ofLT muscle and adipose tissues from Boer bucks.

Fatty acid composition of muscle and adipose tissues of indigenous Caribbean goats under varying nutritional densities1

“…The proportions of Cl8:ln-9 tended to be less than in other studies on growing goats (Casey and Van Niekerk, 1985;Mahgoub et al, 2002;Dhanda et al, 2003;Werdi Pratiwi et al, 2004). The total oddFA plus iso-and anieiso-FA proportions ranged from 4.4 to 8.4% of the total FA in all tissues with progressively increased proportions in SS, IM, and PR, respectively.…”

“…However, goats fed argan pulp had similar proportions of C16:O and C18:0 in both PR and muscle (Bas et al, 2005). In all studied tissues of the Creole goats and especially in SS, the C14:0 proportion was reduced, and less than most of the published values (Mahgoub et al, 2002;Bas et al, 2005;Atti et al, 2006;Werdi Pratiwi et al, 2004. Because consumption of C14:O has been implicated in increasing plasma cholesterol, meat from indigenous Caribbean goats with its reduced C14:0 may have positive health implications.…”

Effects of diet and castration on fatty acid composition and volatile compounds in the meat of Korean native black goats

“…This result indicates that dietary treatment is more influential rather than castration. Nevertheless, Pratiwi et al [ 29 ] suggested that the higher proportion of the UFA in castrated boer was possibly due to the more efficient conversion of the SFA into MUFA via enzymes, such as MUFA cis-9 C18:1. The finding in this study on FAs properties indicate that meat derived from castrated KNBG may be healthier for consumers.…”