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- W1815691557 abstract "The aim of the studies was to evaluate the thermoregulatory behaviour of growing-finishing pigs inpens with access to outdoor areas. In addition, the effect of insulating the roof inside the pig houseon the thermal comfort of the pigs was studied. Four pens with outdoor areas and natural ventilationwere established and three replications were carried out for growers during the winter and three forfinishing pigs during the summer, respectively. In two of the pens the roofs were uninsulated, andthe other two pens were insulated. The outdoor activity area was covered with a simple roof, whilethe outdoor dung area was uncovered. Insulated walls separated the indoor resting areas. Eachoutdoor area included an activity area with rooting material, self-feeder and water bowl, and adunging area with cooling facility. Pig behaviour observations were made via video recordingsfrom a monitor placed in a separate room, so as to avoid disturbing the pigs. The pigs were observedsimultaneously two hours in the morning and two hours in the afternoon. It was determinedhow many pigs were lying in resting area inside, in the activity and dung areas outside and how thepigs were lying; close together (huddling) or scattered without any physical contact with each other.The indoor and outdoor air temperatures were registered every 10 minutes. The results showed thatinsulated roofs stabilized the indoor climate both in winter and in summer, giving higher temperaturesin winter and lower temperatures in summer compared to houses with uninsulated roofs.However, insulation of the roof did only lower the thermoregulatory response in finishing pigs significantlyduring the summer experiment at outdoor temperatures exceeding 15-20 °C, whereas noeffect was observed on huddling behaviour in growers during the winter. This may be due to the useof plenty of straw as bedding material. Significant relationships were found between the outdoortemperature and thermoregulatory behaviours, like 'huddling', 'lying on the side', 'lying in the dungingarea', and time spent inside, as well as the level of activity. In most cases also the group size andthe body weight of the pigs affected the behaviour, probably reflecting an effect of the heat productionmass.In conclusion, climatic factors constitute a major challenge of the adaptability of the pigs in penswith access to outdoor areas. The indoor climate may, however, be stabilized by insulation of theroof, thereby reducing the thermoregulatory response of the pigs, especially during summer time infinishing pigs." @default.
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- W1815691557 date "2003-05-01" @default.
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- W1815691557 title "Thermoregulatory Behaviour of Growing/Finishing Pigs in Pens with Access to Outdoor Areas" @default.
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