UR143 URZ, INRA, Petit-Bourg (Guadeloupe), F-97170, France.
IDEXX Laboratories, 84 Rue Charles Michels, Saint-Denis, F-93200, France.
Sci Rep. 2019 Mar 19;9(1):4878. doi: 10.1038/s41598-019-41145-w.
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.
采食量减少是生长猪面对应激环境条件时的一种常见生理反应。本试验旨在研究：（1）短期限饲和再饲对猪生产性能和代谢的影响；（2）两个品种之间的差异反应，大白猪（LW）经过高生产性能选择，克里奥尔猪（CR）适应热带条件。对 36 头去势公猪（18 头 LW 和 18 头 CR）进行了试验。对于每个品种，一半的动物按标准饲料量的 50%限制饲喂 6 天，然后再正常饲喂 14 天。测量了生长性能、体温调节反应、血浆激素和代谢物。结果表明，对于所有性状，两个品种之间的反应差异很小，很少有显著差异，这可能是由于限饲时间短。无论品种如何，限饲都会降低生长速度和饲料效率，而再饲会迅速得到补偿。限饲还降低了皮肤温度、直肠温度和呼吸率，以及血液尿素和胆固醇，这些可能是限饲的潜在生物标志物。
