Thermorégulation des porcelets issus de deux lignées divergentes pour l’efficacité alimentaire - INRAE - Institut national de recherche pour l’agriculture, l’alimentation et l’environnement Access content directly
Conference Poster Year : 2019

Thermoregulation of piglets from two genetic lines divergent for residual feed intake

Thermorégulation des porcelets issus de deux lignées divergentes pour l’efficacité alimentaire

Abstract

Hypothermia is a factor of piglet neonatal mortality. This study used Infra-Red Thermography (IRT) to assess thermoregulation abilities of piglets from two lines divergent for residual feed intake (RFI). Birth phenotypes (e.g. body weight, rectal temperature, physical measures, vitality test) were recorded from piglets selected for low RFI (more efficient; LRFI; n=34) or high RFI (less efficient; HRFI; n=28). The IRT images were taken at 8, 15, 30 and 60 min post-partum. Temperatures of the ear base and tip, and minimum, maximum and average temperatures of the back (i.e. shoulders to rumps) were extracted with Thermacam Researcher Pro 2.0 and analysed with linear mixed models. No difference in phenotypic data was detected between the two lines. All temperatures increased over time. Rectal temperature of piglets at birth was correlated with the initial temperature of the ear base and the maximum back temperature (0.36 and 0.35, respectively, P < 0.05). Overall, LRFI piglets, compared to HRFI piglets, had higher minimum (28.0 ± 0.2 °C vs 26.8 ± 0.2 °C, respectively, P < 0.001) and average (35.5 ± 0.2 °C vs 34.5 ± 0.1 °C, respectively, P < 0.001) back temperatures. Ear tip temperature decreased in HRFI piglets from 8 to 15 min post-partum, while it increased in LRFI piglets (-1.1 ± 0.4 °C vs 0.5 ± 0.5 °C, respectively, P < 0.05). In conclusion, IRT allowed non-invasive assessment of piglets’ thermoregulation abilities. Piglets selected for low RFI seemed to have better thermoregulation abilities at birth.
Fichier principal
Vignette du fichier
51. Journées Recherches Porcine 5-6 Février_1.pdf (888.08 Ko) Télécharger le fichier
Origin : Publisher files allowed on an open archive
Loading...

Dates and versions

hal-02735040 , version 1 (02-06-2020)

Identifiers

  • HAL Id : hal-02735040 , version 1
  • PRODINRA : 461680

Cite

Oceane Schmitt, Sébastien Reigner, Jean Bailly, Laure Ravon, Yvon Billon, et al.. Thermorégulation des porcelets issus de deux lignées divergentes pour l’efficacité alimentaire. 51. Journées de la Recherche Porcine, Feb 2019, Paris, France. IFIP - Institut du Porc, Journées de la Recherche Porcine en France, 2019, 51ème Journées de la Recherche Porcine. ⟨hal-02735040⟩
45 View
9 Download

Share

Gmail Facebook X LinkedIn More