Bigelow J A, Houpt T R
Department of Physiology, New York State College of Veterinary Medicine, Cornell University, Ithaca 14853.
Physiol Behav. 1988;43(1):99-109. doi: 10.1016/0031-9384(88)90104-7.
Feeding and drinking patterns of six immature female pigs, weighing from 10 to 130 kg, operantly obtaining feed and water at a fixed ratio of 10, were determined. It was found by log survivorship analysis that 10 min was the minimum interbout interval defining separate eating bouts. As the pigs grew through this weight range, daily feed intake increased nearly threefold, while eating bout frequency fell from 14 to 7 per day; consequently both eating bout size and interbout interval increased. However, bout size was increased primarily by an increased rate of eating during bouts without any consistent increase in bout duration. Neither premeal nor postmeal intervals were correlated with meal size. Of the pigs' daily water intake, 75% was closely associated with eating bouts and over 1/3 of this (25%) was preprandial. Sixty-four percent of daily food intake and 68% of water intake was during the 12-hr light period. Nocturnal eating bouts were less frequent, but larger.
测定了6头体重在10至130千克之间的未成年雌性猪的采食和饮水模式，这些猪以固定比例10操作性获取饲料和水。通过对数生存分析发现，10分钟是定义单独进食回合的最小回合间隔。随着猪在这个体重范围内生长，日采食量增加了近三倍，而进食回合频率从每天14次降至7次；因此，进食回合大小和回合间隔都增加了。然而，回合大小的增加主要是由于回合期间进食速率的增加，而回合持续时间没有持续增加。餐前和餐后间隔均与进餐量无关。猪的日饮水量中，75%与进食回合密切相关，其中超过1/3（25%）是餐前饮水。64%的日采食量和68%的饮水量发生在12小时光照期。夜间进食回合频率较低，但规模较大。
