Desempenho, caracter赤sticas de carca a e composi o qu赤mica de diferentes cortes comerciais de novilhas mesti as n o-gestantes ou gestantes terminadas em confinamento = Performance, carcass characteristics and chemical composition of nonpregnant or pregnant heifers finished in feedlot

作者：Livia Maria Araujo Macedo; Ivor Martin do Prado; Taciana Ducatti; Juliana Martin do Prado

来源：Acta Scientiarum - Animal Sciences, 2007.

• acidos graxos
• carca a
• carne
• desempenho
• gesta o
• novilhas
• fatty acids
• carcass
• meat
• performance
• pregnancy
• heifers

Objetivou-se avaliar o efeito da gesta o sobre o desempenho, caracter赤sticas de carca a e composi o f赤sico-qu赤mica de cinco cortes de novilhas mesti as em confinamento. Utilizaram-secinco novilhas gestantes e cinco n o-gestantes com 20 meses e peso corporal de 323 kg. N o houve diferen a (p %26gt; 0,05) para peso final, ganho m谷dio di芍rio, consumo, convers o alimentar, peso de carca a, rendimento de carca a, 芍rea de olho de lombo e espessura de gordura de cobertura entre os tratamentos. O ac谷m das novilhas gestantes teve maiores teores (p 0.05) between treatments. Pregnant heifers chuck showed higher levels (p %26lt; 0.05) of moisture and ash, and lower levels (p %26lt; 0.05) of total fat, than nonpregnant heifers. Pregnant heifers rump showed higher levels (p %26lt; 0.05) of moisture. Nonpregnant heifers striploin had the highest level (p %26lt; 0.05) of moisture. The fatty acid profile of pregnant heifers chuck had the highest levels (p %26lt; 0.05) of 14:0, 16:1n7 and 20:4n6, but showed the lowest level (p %26lt; 0.05) of 17:0. Nonpregnant heifers topside showed the highest levels (p %26lt; 0.05) of 18:1t11 and 18:2c9t1. Pregnant heifers chuck showed the highest level (p %26lt; 0.05) of PUFA. Nonpregnant heifers had higher levels of n-6 fatty acids than pregnant heifers. The striploin of pregnant heifers showed higher percentage (p %26lt; 0.05) of n-3.