Effect of heat stress on blood rheology in different pigs breeds
| Autor: | David Renaudeau, Michelle Baillot, Tawfik Chalabi, L. Philibert, Philippe Connes, Xavier Waltz, Jean-Luc Gourdine, Eric Beltan |
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| Přispěvatelé: | Adaptation, Climat Tropical, Exercice et Santé (ACTES), Université des Antilles (UA), Unité de Recherches Zootechniques (URZ), Institut National de la Recherche Agronomique (INRA), Physiologie, Environnement et Génétique pour l'Animal et les Systèmes d'Elevage [Rennes] (PEGASE), AGROCAMPUS OUEST-Institut National de la Recherche Agronomique (INRA), Institut National de la Recherche Agronomique (INRA)-AGROCAMPUS OUEST, Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro) |
| Rok vydání: | 2014 |
| Předmět: |
0106 biological sciences
breed Respiratory rate Swine Physiology [SDV]Life Sciences [q-bio] hot temperature Blood viscosity 01 natural sciences 03 medical and health sciences Animal science Rheology Physiology (medical) medicine Animals 030304 developmental biology 2. Zero hunger 0303 health sciences Chemistry pigs Large white Hematology Breed Heat stress Red blood cell medicine.anatomical_structure Hemorheology Cardiology and Cardiovascular Medicine 010606 plant biology & botany |
| Zdroj: | Clinical Hemorheology and Microcirculation Clinical Hemorheology and Microcirculation, IOS Press, 2014, 58 (3), pp.395-402. ⟨10.3233/CH-131722⟩ |
| ISSN: | 1386-0291 |
| Popis: | International audience; The main objectives of the present work were to test the effects of heat stress on blood rheology and to determine whether the responses can change according to the pig breeds. Thirty-six pigs from three pig's lines (n = 12 for each line) with assumed different tolerance to heat stress were compared: Large White (LW, little tolerance), Creole (CR, good tolerance) and LW × CR pigs (produced from a cross between LW and CR lines). In a first period, all pigs were exposed to a 9-d period of thermo-neutral environment (24°C; d-9 to d-1; P0). At the end of P0, six pigs from each line were slaughtered (n = 18). Then in a second period, the remaining pigs (6/breed; n = 18) were exposed to a 5-d period of heat stress (32°C; d + 1 -d + 5; P1) and thereafter slaughtered at d + 5. Rectal and skin temperatures, as well as respiratory rate, were recorded on d-1 and d + 5. At slaughter, blood was sampled for hematological and hemorheological measurements. Heat stress caused a rise of the skin temperature and respiratory rate without any changes in the rectal temperature or on the hematological and hemorheological parameters when all pigs' lines were considered. We observed a pig line effect on blood viscosity at high shear rate (375 s-1) and red blood cell deformability at 30 Pa with CR pigs having lower blood viscosity and higher red blood cell deformability than LW pigs. While the changes of blood viscosity under heat stress did not reach statistical significance in LW and CR lines, blood viscosity (at 375 s-1) increased above the temperate values in the LW × CR line. Red blood cell deformability at 30 Pa was higher in CR pigs exposed to heat stress compared to LW pigs in the same condition. In conclusion, thermal loading caused physiological stress but did not widely change the hematological and hemorheological profiles. Although some blood rheological parameters seem to vary with the pig breeds, the responses to heat stress are very similar. |
| Databáze: | OpenAIRE |
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