Effect of feed restriction and refeeding on performance and metabolism of European and Caribbean growing pigs in a tropical climate

Nausicaa Poullet (1) , Jean-Christophe Bambou (1) , Thomas Loyau (1) , Christine Trefeu (2) , Dalila Feuillet (1) , David Beramice (3) , Bruno Bocage (3) , David Renaudeau (2) , Jean-Luc Gourdine (1)

1 URZ - Unité de Recherches Zootechniques
2 PEGASE - Physiologie, Environnement et Génétique pour l'Animal et les Systèmes d'Elevage [Rennes]
3 PTEA - Plateforme Tropicale d'Expérimentation sur l'Animal

Reduction in feed intake is a common physiological response of growing pigs facing stressful environmental conditions. The present experiment aims to study (1) the effects of a short-term feed restriction and refeeding on pig performance and metabolism and (2) the differential response between two breeds, Large White (LW), which has been selected for high performance, and Creole (CR), which is adapted to tropical conditions. A trial of 36 castrated male pigs (18 LW and 18 CR) was carried out. For each breed, half of the animals were restrictively fed at 50% of the standard feed allowance for 6 days and then fed normally for the next 14 days. Growth performance, thermoregulatory responses, plasma hormones and metabolites were measured. Results showed that, for all traits, the difference in response between the two breeds was small and rarely significant, which may be due to the short duration of the feed restriction. Irrespective of breed, feed restriction induced a reduction of growth rate and feed efficiency that was rapidly compensated for upon refeeding. Feed restriction also reduced skin temperature, rectal temperature and respiratory rate, as well as blood urea and cholesterol, which are of interest as potential biomarkers for feed restriction.

Mots clés: swine; thermoregulation; growth; tropical climate

Mots clés: climat tropical; porc; large white; race creole; métabolisme; restriction alimentaire; croissance; hormone plasmatique; métabolite du plasma

Domaines: Sciences du Vivant [q-bio]

Nausicaa Poullet, Jean-Christophe Bambou, Thomas Loyau, Christine Trefeu, Dalila Feuillet, et al.. Effect of feed restriction and refeeding on performance and metabolism of European and Caribbean growing pigs in a tropical climate. Scientific Reports, 2019, 9, pp.4878. ⟨10.1038/s41598-019-41145-w⟩. ⟨hal-02090591⟩