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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Campos, Paulo Henrique Reis Furtado Noblet, Jean Jaguelin-Peyraud, Yolande Gilbert, Hélène Mormède, Pierre Donzele, Rita Flavia Miranda de Oliveira Donzele, Juarez Lopes Renaudeau, David |
| Description | Country affiliation: France Author Affiliation: Campos PH ( INRA, UMR 1348 PEGASE, 35590, Saint-Gilles, France.) |
| Abstract | The objective of this study was to evaluate the performance and thermoregulatory responses during acclimation to high ambient temperature (Ta) of pigs from two lines selected for high (RFI(+)) or low (RFI(-)) residual feed intake with the hypothesis that RFI(-) pigs producing less heat would better tolerate high Ta. Pigs (50 kg initial body weight; 17 per line among which 10 of them were catheterized) were individually housed in a climatic-controlled room where Ta was maintained at 24.2 ± 0.4 °C during 7 days and thereafter at 30.4 ± 0.7 °C during 14 days. Irrespective of Ta, RFI(-) pigs had lower feed intake (ADFI) and similar average daily gain (ADG) than RFI(+) pigs. Whatever the line, ADFI, ADG, and feed efficiency decreased with increased Ta. Overall, the Ta increase resulted in an increase in rectal temperature (RT), skin temperature (ST), and respiratory rate (RR) within the first 24-48 h and, subsequently, in a decrease followed by stabilization. The RT decrease during acclimation occurred 24 h earlier in RFI(-) pigs than in RFI(+). Thyroid hormones and cortisol decreased at high Ta and it was similar in both lines. Based on performance and RT, ST, and RR responses, it seems that selection for low RFI tends to ameliorate pigs' tolerance to high Ta. Nevertheless, this selection does not induce significant differences between lines in endocrine and metabolite responses during thermal stress. |
| File Format | HTM / HTML |
| ISSN | 00207128 |
| Issue Number | 7 |
| Volume Number | 58 |
| e-ISSN | 14321254 |
| Journal | International Journal of Biometeorology |
| Language | English |
| Publisher | Springer |
| Publisher Date | 2014-09-01 |
| Publisher Place | United States |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Discipline Biophysics Acclimatization Physiology Body Temperature Regulation Eating Hot Temperature Adverse Effects Swine Animal Feed Animals Body Temperature Hydrocortisone Blood Male Respiratory Rate Thyroxine Triiodothyronine Journal Article Research Support, Non-u.s. Gov't |
| Content Type | Text |
| Resource Type | Article |
| Subject | Ecology Health, Toxicology and Mutagenesis Atmospheric Science |
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