Effect of Rearing Period on Yield Rate, Physical Properties and Fatty Acid Composition of Duck Meats

출하 일령에 따른 오리육의 수율, 물리적 특성 및 지방산 조성 변화

  • Published : 2005.09.01

Abstract

This study was performed to investigate the effect of rearing period(45 and 70 days) on the changes of the yield, physical trait and the composition of fatty acids. The average weight of 100 duck meat at 45 days post hatch was 2.2kg. The yield of meats from prime cuts of 2.1kg, which are the most consumed today, was composed to whole legs($14.1\%$), wings($8.7\%$) and breast(12.5\%$). The ratio of whole legs and breast was similar, In the secondary cuts, the meats was consisted in drumstick($12.5\%$), thigh($7.3\%$), breast($11.7\%$), tender lion($0.8\%$), drum matte($4.9\%$) and wing($2.6\%$). Especially, the drumstick was twice higher than the wing. The content of oleic acid was 50.87 to $51.32\%$ and 49.84 to $50.03\%$ in the breasts and leg, respectively. In the breast, meat at 75 days the oleic acid was slightly increased DHA was not detected in the breast meat, However, it was $0.13\%$ in the leg. The $a^{*}$ value in meat color, ranged was 16.67 to 17.92 in the breast and 15.81 to 17.15 in the leg. Statistically, there was no significantly difference between the breast and leg. The cooking loss of the breast and leg was $26.37\%\;and\;30.32\%$, respectively. The shear force value was $2.20\;kg/0.5inch^2$ at 45 and $2.84\;kg/0.5inch^2$ at 75 days post hatchet respectively. Therefore, the raring period was effect on the shear force value, but not on the cooking loss and meat color.

본 연구는 오리육의 출하 일령(45, 70일)에 따른 수율 및 물리적 특성, 지방산 조성의 변화를 구명하고자 본 연구를 수행하였다. 45일령 오리육의 100수에 대한 평균체중은 2.2kg이었고, 현재 가장 많이 소비되는 2.1 kg 대의 대분할 부분육 수율은 통 다리가 $14.1\%$, 통 날개 $8.7\%$, 통 가슴 $12.5\%$로 통 다리와 통 가슴의 비율이 거의 유사하게 나타났으며, 소분할은 북채 $6.8\%$, 넓적다리 $7.3\%$, 가슴살 $11.7\%$, 안심 $0.8\%$로 나타났고, 날개 $2.6\%$, 봉 $4.9\%$로 날개보다는 봉이 2배 가까이 높은 것으로 나타내었다. 지방산에서 oleic acid(C18:1, n9) 조성은 가슴육이 $50.87\~51.32\%$, 다리육 $49.84\~50.03\%$로 가슴육에서 $1.03\~1.29\%$ 정도 많은 것으로 나타내었다. 사육 일령에 따른 가슴부위의 Oleic acid의 조성은 45일에서 70일령으로 증가함에 따라 50.87에서 $51.32\%$로 높아졌다. Docosahexaenoic acid(C22:6, n3, DHA)는 가슴육에서는 전혀 검출되지 않았으나 다리육에서 $0.13\~0.28\%$로 미량이 검출되었다. 육색에서 적색도를 나타내는 $a^{*}$ 값은 가슴부위에서 $16.67\~17.92$를 나타내었고 다리부위는 $15.81\~17.15$로 가슴 및 다리육의 적색도가 비슷한 경향을 나타내었고, 사육일령에 따라서는 일정한 경향을 나타내지 않았다. 가열 감량은 가슴육에서 $26.37\~28.79\%$이고 다리육은 $30.32\~31.32\%$로 다리육에서 가열감량이 $2\~4\%$ 증가한 것으로 나타내었다. 그러나, 사육일령에 따라서는 일정한 경향을 나타내지 않았다. 전단력은 가슴육에서 45일령이 $2.20\;kg/0.5inch^2$, 70일령 $2.84\;kg/0.5inch^2$로 사육일령이 증가함에 고기의 연도도 함께 증가하는 것으로 나타내었다.

Keywords

References

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