Guo Zhenhua, Lv Lei, Liu Di, Fu Bo
Heilongjiang Academy of Agricultural Sciences, Animal Husbandry Research Institute, Key Laboratory of Combining Farming and Animal Husbandry, Ministry of Agriculture and Rural Affairs, No. 368 Xuefu Road, Harbin, 150086, People's Republic of China.
Heilongjiang Academy of Agricultural Sciences (HAAS) Postdoctoral Programme, Animal Husbandry Research Institute, No. 368 Xuefu Road, Harbin, 150086, People's Republic of China.
Trop Anim Health Prod. 2018 Aug;50(6):1203-1208. doi: 10.1007/s11250-018-1633-4. Epub 2018 Jun 8.
Heat stress is problematic for pigs raised in tropical environments. The animal is large and has proportionally high body heat, and subcutaneous fat thickness reduces the animal's ability to thermoregulate. It is not clear how stress affects pig litter size. For this reason, we performed a meta-analysis of the effect of heat stress on pig litter size. We reviewed behavioral, endocrine, and cellular data and the signaling pathways involved in heat stress. We found that heat stress did not affect litter size or the body weight of offspring. However, heat stress was found to decrease litter body weight gain due to reductions in sow milk production. For this reason, artificial feeding of piglets may be appropriate.
热应激对于在热带环境中饲养的猪来说是个问题。猪体型较大且体热相对较高，皮下脂肪厚度降低了猪的体温调节能力。目前尚不清楚应激如何影响猪的窝产仔数。因此，我们对热应激对猪窝产仔数的影响进行了荟萃分析。我们回顾了行为、内分泌和细胞数据以及热应激所涉及的信号通路。我们发现热应激并不影响窝产仔数或后代的体重。然而，由于母猪产奶量减少，热应激会降低仔猪体重增加。因此，对仔猪进行人工喂养可能是合适的。
