Effect of Feeding-Fasting Interval on Finishing Pigs: Blood Urea and Serum Lipid, Cholesterol and Protein Concentrations

Abstract

A system of restricted feeding in which feed is entirely withheld for intervals of 24, 48 or 72 hr. following a 24-hr. period of ad libitum feeding in continuous sequence throughout the finishing period depresses weight gain and efficiency of feed utilization in direct relation to duration of the fasting period and has marked associated effects on carcass measurements, gland and organ weights and a small effect on fatty acid composition of the back fat (Veum et al., 1970). Cohn (1963) and Leveille and Hanson (1965, 1966) have shown marked changes in metabolism of nutrients and in body composition associated with frequency of meal intake in laboratory animals. The work reported herein was included as a part of the experiment of Veum et al. (1970). The purpose was to determine the effects of feeding-fasting interval of finishing pigs on several blood parameters in terms of postprandial and long-term changes in concentrations associated with feeding sequence.

Feeding behavior of growing and finishing pigs fed different dietary threonine levels in a group-phase feeding and individual precision feeding system

“…Following an opposite direction in the factor, with a positive loading (0.6), was plasma urea concentration. Basal plasma urea is well controlled, but it is affected by prolonged fasting ( Veum et al, 1970 ) and, in this study, was not associated with crude protein intake (data not shown). A first assumption would be that pigs that go for long periods without feed present a plasma urea drop, and they will eat faster when they present themselves to the feeder once they are hungry.…”

Effects of acute fasting and age on leptin and peroxisome proliferator-activated receptor gamma production relative to fat depot in immature and mature pigs

“…Feed was removed from the Fasted pigs (PP, n = 8; M, n = 8) for a period of 72 h prior to euthanasia. The duration of fasting for 72 h was based on the foundational studies reported by Veum et al. (1970) and Steffen et al.…”

“…Feed was removed from the Fasted pigs (PP, n = 8; M, n = 8) for a period of 72 h prior to euthanasia. The duration of fasting for 72 h was based on the foundational studies reported by Veum et al (1970) and Steffen et al (1981), who reported that fasted growing-finishing pigs did not clinically exhibit fasting-induced metabolic symptoms until they had been fasted for at least 72 h. After 72 h, dramatic measurable differences in weight gain and circulatory parameters, such as triglycerols and cholesterol, will occur. Therefore, acute fasting is defined as a 72 h period of time during which the animal is deprived of food and a chronic fast would define a period of time during which food was deprived longer 72 h.…”

Nitrogen Metabolism of Gravid and Nongravid Female Swine Fed Every Third Day

“…Finishing pigs (49 to 90 kg) adapted to an every-third-day feeding program (Veum et al, 1970) exhibit an increase in blood urea N 10 h after the meal followed by gradual reductions at both 34 and 54 h postprandial. Our N excretion data follow the pattern of this blood urea N data.…”