Effect of temperature on thermal acclimation in growing pigs estimated using a nonlinear function

Journal of Animal Science
D RenaudeauJ L Gourdine

Abstract

Ninety-six Large White growing barrows were used to determine the effect of temperature on thermoregulatory responses during acclimation to increased ambient temperature. Pigs were exposed to 24°C for 10 d and thereafter to a constant temperature of 24, 28, 32, or 36°C for 20 d. The study was conducted in a climate-controlled room at the INRA experimental facilities in Guadeloupe, French West Indies. Relative humidity was kept constant at 80% throughout the experimental period. Rectal temperature, cutaneous temperature, and respiratory rate were measured [breaths per minute (bpm)] 3 times daily (0700, 1200, and 1800 h) every 2 or 3 d during the experiment. The thermal circulation index (TCI) was determined from rectal, cutaneous, and ambient temperature measurements. Changes in rectal temperature, respiratory rate, TCI, and ADFI over the duration of exposure to hot temperatures were modeled using nonlinear responses curves. Within 1 h of exposure to increased temperature, rectal temperature and respiratory rate increased by 0.46°C/d and +29.3 bpm/d, respectively, and ADFI and TCI decreased linearly by 44.7 g•d(-2)•kg(-0.60) and 1.32°C/d, respectively until a first breakpoint time (td(1)). This point marked the end of the short-...Continue Reading

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Citations

Jan 1, 1996·Trends in Microbiology·R Longnecker, C L Miller
Oct 6, 1997·Cellular Signalling·N Dunant, K Ballmer-Hofer
May 9, 2012·Animal : an International Journal of Animal Bioscience·D RenaudeauR J Collier
Jan 16, 2014·Animal : an International Journal of Animal Bioscience·P Rovira
Jan 7, 2014·International Journal of Biometeorology·Paulo Henrique Reis Furtado CamposDavid Renaudeau
Oct 10, 2013·International Journal of Hyperthermia : the Official Journal of European Society for Hyperthermic Oncology, North American Hyperthermia Group·Jay S JohnsonLance H Baumgard
Aug 24, 2018·Journal of Animal Science·Luan Sousa Dos SantosLuciano Hauschild
Jan 25, 2018·Translational Animal Science·Nicholas K GablerNicole Reisinger
Dec 8, 2015·Journal of Animal Science·Robin R WhiteMark D Hanigan
Jan 27, 2016·Journal of Animal Science·A MoralesM Cervantes
Jul 27, 2020·Translational Animal Science·Adriana MoralesMiguel Cervantes
Dec 21, 2018·Veterinary Research Communications·Angela Cristina da Fonseca de OliveiraLeandro Batista Costa
Aug 23, 2020·Animals : an Open Access Journal From MDPI·Dorota GodyńFrederico Márcio Corrêa Vieira

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