Animal Science Abstract
The fatty acid composition of muscle and adipose tissues from entire and castrated male Boer goats raised in Australia
N. M. Werdi PratiwiA, P. J. Murray and D. G. TaylorB
AE-mail: nmw@sas.uq.edu.au
BPresent address: Baroona Park, Mail Service 1497, Toowoomba, Queensland 4352, 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 of LT 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 rôle in changing the fatty acid composition of LT muscle and adipose tissues from Boer bucks.
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