The objective of this study was to comparatively analyze the vocalizations of farrowing sows and their piglets in a welfare certified farm and a conventional farm as they are useful parameters for animal welfare assessment. The conventional farm using the gestation stall, farrowing crate and nursery, grower‐finisher pigs were accommodated in small pens. On the other hand, in the welfare certified farm using the group feeding gestation sows, which allows them to turn around in the furrowing pens, unlike in the crates and nursery, grower‐finisher pigs were accommodated in large pens. Vocalization of farrowing sows and their piglets were recoded and acoustic parameters were analyzed. Eight vocalizations―screaming, fighting, playing, suckling competition, suckling, piglet call, frightened, and space competition―were recoded in the farrowing crate and classified; 4 ordinary and 4 non‐ordinary vocalizations were identified. However, frightened and space competition vocalizations were not detected in the farrowing pen. Screaming, fighting, playing, suckling competition, and suckling vocalizations were significantly (p<0.01) different in pitch, intensity and duration between the farrowing pen and the farrowing crate. Piglet call vocalization did not differ between the farrowing facilities. These findings will aid us in using the differences in vocalizations, under different conditions, as parameters of animal welfare assessment.

본 연구는 종부한 다음에 개별 스톨에서 사육하고 3주 후 임신진단을 하여 임신을 한 경산돈을 개별 스톨 시설과 Shoulder length barrier 시설에서 각각 계절별 30두씩 12주 동안 사육한 후 분만 1주일 전에 분만사의 분만틀 시설로 옮겨 4주 동안 사육하고 산자수, 생시체중, 이유두수, 이유체중 및 체평점 등을 평가함으로써, 임신돈사의 개별 스톨 시설과 Shoulder length barrier 시설이 분만모돈의 분만성적에 미치는 영향을 규명하고자 수행되었다. 그 결과 동일 계절에서 시설 간의 분만모돈의 생산성은 차이가 없었으나(p>0.05), 봄, 가을 및 겨울에 비하여 여름에 더위 스트레스로 인하여 산자수와 이 유두수가 낮은 경향이 나타났다. 결론적으로 임신기간 동안 임신돈을 사육하는 개별 스톨 시설과 Shoulder length barrier 시설이 분만모돈의 분만성적에 영향을 미치지 않는 것으로 나타났다.