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KMID : 1025520100520010037
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Journal of Animal Science and Technology
2010 Volume.52 No. 1 p.37 ~ p.42
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Effects of the Castration Time on Growth Performance, Meat Quality and Fatty Acid Profiles of Korean Black Goats.
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Choi Soon-Ho
Kim Sang-Woo
Hwang Bo-Soon
Choi Chang-Yong
Kim JIn-Hyoung
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Abstract
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A study was conducted to examine the effect of the castration time on growth, meat quality and fatty acid composition of Korean black goats. Forty five male kids were divided into five groups, including control (without castration) and four groups with the kids castrated at 0.5, 3, 5 and 7 months of age, respectively. Average daily body weight gain(ADG) for control was significantly(P<0.05) higher than the castrated groups. ADG did not differ between the castrated groups. The ADG of the male kids castrated at 3 and 5 months of age tended to be higher than the other castrated groups. Dressing percentage for 0.5 months-castrated group was higher than 7 months-castrated group. Retail cut percentages for control was higher(P<0.05) than others, but the retail cut percentages did not differ between the castrated groups. Compared with control, higher fat percentages of carcasses appeared in the castrated groups(P<0.05). The fat percentages gradually increased in earlier castrated animals. As castrated earlier, moisture contents tended to decrease, whereas crude protein and fat contents tended to increase. The different castration time did not affect physical properties of goat meat (shear force, cooking loss, and water holding capacity). Results from panel tests showed that juiciness or tenderness of meats for 5 months-castrated group tended to be higher than those for the other groups. The flavor of meatfor 7-months castrated group appeared to be more favorable compared with 0.5- or 3-months castrated groups(P<0.05). The proportion of saturated fatty acid in meat washigher for 5-months castrated group and lower for 3-months castrated group as compared to the other castrated groups, whereas the proportion of unsaturated fatty acid was vice versa(P<0.05). Mono-unsaturated fatty acid contents did not differ between thecastrated groups. Present results indicatedthat castration at 3 or 5 months of age increased growth performance and meat quality of Korean black goats.
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KEYWORD
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Korean black goat, Castration, Growth, Meat quality, Fatty acid
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