GROWTH AND ACTH RESPONSES TO COLD STRESS OF YOUNG PIGS FED AD-LIBITUM

被引:9
作者
BROWN, DE [1 ]
HACKER, RR [1 ]
KING, GJ [1 ]
机构
[1] UNIV GUELPH, DEPT ANIM & POULTRY SCI, GUELPH N1G 2W1, ONTARIO, CANADA
关键词
D O I
10.4141/cjas76-045
中图分类号
S8 [畜牧、 动物医学、狩猎、蚕、蜂];
学科分类号
0905 ;
摘要
Twenty-four 6-wk-old pigs were housed in individual metabolism cages and exposed for 6 wk to either 2 or 20.degree. C with ad lib feed and water. The pigs at 20 and 2.degree. C had an average daily gain of 544 g and 343 g (P < 0.01), respectively. Feed consumption was similar for both treatments, with feed:gain ratios being significantly lower in the 20.degree. C group during the 1st and 3rd 2-wk periods. Spleen and kidney weights were a larger percent of ingesta-free body weight in pigs housed at 2.degree. C. The percent body weight of livers, thyroids, testicles, seminal vesicles and bulbo-urethral glands were not statistically different between 20.degree. C and 2.degree. C housed pigs. Body protein and ash were 5 and 1.3% lower, respectively in the 2.degree. C pigs. Differences in plasma ACTH between treatments within day were significant. Consistently lower levels of plasma ACTH were obtained from pigs housed at 2.degree. C.
引用
收藏
页码:365 / 371
页数:7
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