포유단계에서 사회화 경험에 따른 이유자돈의 행동과 체중
Behaviors and Body Weight of Weaned Piglets in Different Social Experiences During Suckling Period
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초록
본 연구는 포유단계에서 사회화 경험이 다른 이유자돈의 합사 후 행동과 체중이 차이를 보이는지를 파악하기 위해 실시되었다. 포유단계에서 사회화 경험이 없는 대조구와 사회화 경험이 있는 처리구로 나누었으며, 합사 후 합사 초기(합사 후 1일과 2일)와 합사 후기(합사 후 22일, 23일)의 4일 동안 비디오촬영을 통한 이유자돈의 행동 유형별 지속시간과 빈도를 분석하였다. 전체 실험 기간 동안 이유자돈의 개체유지행동은 움직임이 없는 미활동이 전체의 60% 이상으로 대부분을 차지하였다. 개체유지행동의 경우, 합사 초기에는 미활동과 이동, 탐색에서 대조구와 처리구 사에서 유의한 차이를 보였으며, 합사 후기에는 먹이 먹기가 차이를 나타내었다. 사회행동 중 적대행동과 옆 돈방의 자돈과의 상호행동은 처리구에 비해서 대조구에서 유의하게 높았다. 그러나 합사 후기에는 사회행동이 급격하게 감소하였으며, 대조구와 처리구 사이의 차이도 크지 않았다. 이유자돈의 체중의 변화와 유형별 행동사이의 관계를 분석한 결과, 자돈의 일당증체량과 적대행동 사이에는 부의 상관관계가 있었다. 본 연구를 통해서 사회화 경험이 있는 이유자돈의 경우 적대행동이 적고 일당증체량이 큰 것으로 나타났다.
Abstract
This study was conducted to clarify behavior and body weight of weaned piglets between different social experiences during suckling period. Control (no social experience) and treatment (social experience) groups of weaned piglets were housed and observed with the aid of video technology for 8 consecutive hours in early (days 1 and 2) and late (days 22 and 23) periods after mixing. Inactive, locomotion and exploration were significantly different between control and treatment groups in early mixed period. Feeding differed between groups in late mixed period. In social behaviors, agonistic and interaction with adjacent pen were significantly higher in treatment group than in control group during early mixed period. However, social behaviors dramatically decreased in late mixed period. There was negative correlation between average daily gain of body weight and agonistic behavior. In social experienced weaned piglet groups, there were less agonistic behavior and more daily gain of body weight in this study. Social experience during suckling period would be useful for stable group management in swine industry.
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