ACTA VETERINARIA ET ZOOTECHNICA SINICA ›› 2016, Vol. 47 ›› Issue (1): 85-91.doi: 10.11843/j.issn.0366-6964.2016.01.012

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Temperature Changes during Estrus in Swine Was Studied by Infrared Temperature Measurement Device

QIN Yong-xiao1,WANG Yu-liang1,GAO Xue-feng1,MI Shi-rong1,QIU Xiao-tian2,ZHANG Qin1,DING Xiang-dong1*   

  1. (1.Key Laboratory of Animal Genetics,Breeding and Reproduction,Ministry of Agriculture,National Engineering Laboratory for Animal Breeding,College of Animal Science and Technology,China Agricultural University,Beijing 100193,China;2.The National Animal Husbandry Station,Beijing 100125,China)
  • Received:2015-03-30 Online:2016-01-23 Published:2016-01-23

Abstract:

This study aimed to investigate the change of rectal and surface temperature of sows during estrus, the temperature was separately measured by infrared temperature measurement device and conventional electronic thermometer. In addition, the effects of ambient temperature, wind speed and relative humidity were studied as well. A total of 150 sows selected from Duroc, Landrace and Large White, were splited into 5 batches, for each sow, its rectal temperature and surface temperature at 10 time points of mating were measured. Our results showed that:1)Within a distance range of 5-30 cm, surface temperatures were not affected by the distance of infrared device with sow; 2)Surface temperature measured at different body parts were significantly different (P<0.05), and the back of pig was an ideal position for measurement of body temperature; 3)The rectal temperature increased with estrus starting, then reached a peak at mating, thereafter decreased significantly (P<0.05), the surface temperature also reached highest during mating; 4) Estrus significantly influenced rectal temperature and surface temperature (P<0.05), and the measurement time did not take effect on them. Within the appropriate range, the ambient temperature, wind speed and relative humidity had rare influence on rectal and surface temperature, but not vice versa.

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