이눌린 급여가 거세돈 및 비거세돈의 지방조직 내 웅취물질에 미치는 영향
Effects of Dietary Inulin on Boar Taint in Adipose Tissues from Entire and Castrated Male Pigs
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양돈산업은 돼지고기 내 웅취발생 예방을 위한 방법으로 수컷 자돈에게 물리적 거세를 관행적으로 실시해왔다. 그러나 동물복지에 대한 관심이 고조됨에 따라 일부 국가들에서는 고통 최소화 물리적 거세법 권장 또는 대체 방법에 대해 연구를 수행하고 있다. 따라서 본 연구에서는 비거세돈(EM; entire male pigs) 및 거세돈(CM; castrated male pigs)에서 이눌린의 급여가 지방조직 내 웅취물질 농도에 미치는 영향을 구명하고자 실시하였다. 시험동물은 총 26두의 3원 교잡돈(EM, n=18; CM, n=8)을 사용하였다. 시험 처리구는 3% 이눌린의 급여와 비급여를 설정하여 총 4개 처리구(EM0, EM3, CM0 및 CM3)로 구성하였다. 웅취분석을 위해 지방조직은 등지방, 목지방 및 삼겹지방을 수집하였다. 등지방 내 인돌 농도는 EM0에 비해 CM3에서 감소하였고(p<0.05) 목지방 및 삼겹지방에서는 처리구간 차이가 없었다. 지방조직 내 평균 인돌 농도는 EM0에 비해 EM3, CM0 및 CM3에서 감소하였다(p<0.05). 등지방 내 스카톨 농도는 CM0, CM3에서 EM0보다 감소하였다(p<0.05). 또한, 목지방 내 스카톨 농도 및 지방조직 내 평균 스카톨 농도는 CM3에서 EM0과 EM3보다 감소가 확인되었다(p<0.05). 그러나 안드로스테논 농도는 분석된 지방조직들 모두에서 처리구간 통계적인 차이가 없다. 이러한 결과들은 이눌린 급여에 의해 비거세돈의 지방 내 웅취물질 저감에 부분적인 효과를 나타냈을 뿐만 아니라 거세돈에서도 웅취물질 감소에 긍정적인 영향을 미쳤음을 시사한다. 따라서, 본 연구결과는 물리적인 거세가 전면 금지된다면 동물복지형 사양관리 기술개발의 기초자료로 활용할 수 있을 것이다.
Abstract
Swine industry has conventionally performed surgical castration of male piglets for preventing boar taint. However, there is a current trend of seeking alternatives to the surgical castration, such as nutritional interventions. This study investigated effect of dietary inulin on boar taint in adipose tissues from entire male (EM) and castrated male (CM) pigs. A total of 26 pigs (EM, n=18; CM, n=8) were divided into four treatment groups: EM pigs fed 0% inulin (EM0) and 3% inulin (EM3), and CM pigs fed 0% inulin (CM0) and 3% inulin (CM3). Fat samples were collected from neck, back and belly after trial termination. The back fat indole concentration was lower in CM3 pigs than in EM0 ones (p<0.05), but did not differ between the groups. The average indole concentration of all adipose tissue was lower in EM3, CM0, and CM3 pigs than in EM0 pigs (p<0.05). The back fat skatole concentration was lower in CM0 and CM3 pigs than in EM0 pigs (p<0.05). Similarly, the average skatole concentration of all adipose tissue and the neck fat skatole concentration were lower in CM3 pigs than in EM0 and EM3 ones (p<0.05). However, androstenone levels in adipose tissues were not affected by inulin. Thus, dietary inulin is partial effect for reducing boar taint in EM pigs and has a positive effect on CM pigs. Our results can be utilized as basic data for developing feeding and management methods to support the welfare of EM pigs and prohibit or limit surgical castration.
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