번식계절 엘크사슴에 대한 Glutathione 급여 효과에 관한 연구
Effect of Dietary Glutathione Supplementation on Elk Bulls in Breeding Season
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본 연구는 번식계절인 가을철에 glutathione 급여가 사슴의 사료섭취량, 체중변화, 행동변화 및 경제성에 미치는 영향을 구명하기 위하여 실시하였다. 시험은 절각이 끝난 엘크 성록수컷 총 16두를 공시하였으며, 각각 8두씩 대조구와glutathione 급여구에 배치하였다. 체중의 0.85%에 해당하는농후사료를 급여하고 조사료는 목건초를 자유채식 시켰으며, glutathione은 체중 kg당 6 mg을 급여하였다. 그 결과는다음과 같다. 번식계절(8월-11월) 엘크 수사슴의 체중감소는대조구가 42.6±19.2 kg 이었으며, glutathione 급여구는20.6±19.9 kg으로 대조구에 비하여 glutathione 급여구가5.2% 체중감소 억제효과가 있었다(p<0.05). 가을철이 되면사슴의 사료섭취량은 자발적으로 감소하지만 1일 두당 건물섭취량은 대조구와 glutathione 급여구 각각 5.59 및 5.80 kg으로 glutathione 급여구가 1일 건물섭취량이 많았으나 두처리간의 사료섭취량은 통계적으로 유의성은 인정되지 않았다. 그러나 glutathione 급여구가 사료섭취량이 증가하는 경향을 보였다. 경제성 분석에서는 수입에 의존하는 glutathione 가격 때문에 번식계절 동안 두당 99,000원의 추가비용이 소요되었다. 울음 등 행동변화는 glutathione 급여구가 대조구에 비하여, 울음강도 및 사고축 발생이 낮아 번식계절에 사슴농가에서 체중감소 방지 및 사고축 발생 억제 보조사료로glutathione을 사용할 수 있을 것으로 사료된다.
Abstract
We investigated the effect of glutathione supplementation on feed intake, body weight loss, behavior change and economic analysis of elk bull in breeding season. Sixteen elk bulls (5-year-old, average weight; 330 kg) after antler cutting were divided into 2 groups. Eight bulls in each group (control and glutathione group) were fed experimental diet at a level of 0.85 percent of body weight and 6 mg glutathione per kg body weight. As a result, weight-loss of control animal during experimental study (from September to November) was 42.6±19.2 kg while that of glutathione-supplemented group was 20.6±19.9 kg. Compared to control group, glutathione-fed group had prevented the body weight loss by 5.2% (p<0.05). Although the feed intake of elk voluntarily decreases during breeding season, daily DM intake per head was 5.59 and 5.80kg in control and glutathione-fed group, respectively. While the statistical difference in feed intake between two groups was not observed, feed intake tended to increase in glutathione-fed group. In economic analysis, additional cost of 99,000 KRW per head was spent due to the cost of glutathione because of its import. Changes in behavior such as crying, deer whistles, whistling intensity and frequency of accident were lower in glutathione-fed group compared to control. During breeding season, use of glutathione as feed supplement could suppress body weight loss and accidents in deer farm.
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