Effects of temperature and temperature‐humidity index on the reproductive performance of sows during summer months under a temperate climate

• DOI: 10.1111/asj.12569
• Publication Date: 2016-03-18T12:12:55Z
• Authors: Kerstin Wegner; Christian Lambertz; Gürbüz Das; Gerald Reiner; Matthias Gauly
• Keywords: Heat index; Litter

Heat stress is known to influence sow reproduction, but it unknown which extent under temperate climates. Therefore, the impact of temperature and temperature-humidity index (THI) on reproductive performance sows during summer months from 2009 2011 were studied. Reproductive parameters 22 264 inseminations 21 610 resulting farrowings German commercial farms analyzed. Climatic records available nearest weather station. Effects THI at different periods cycle estimated May September where temperatures expected climatic conditions indoors. High values 5 days pre- 14 post-breeding reduced litter size by 0.01 0.03 piglets (P < 0.05). Prior farrowing, number liveborn was 0.05) stillborns increased with rising variables 0.001). On day numbers weaned observed when elevated 0.05), pre-weaning mortality not influenced > In conclusion, even adverse effects are present. Thereby, can be considered as most sensitive parameter heat stress. Considering climate change predicted waves, strategies mitigate necessary.