COMPENSATORY GROWTH IN FINISHING PIGS AFTER FEED RESTRICTION 1'2

Pigs weighing 48 and 66 kg in Exp. 1 and 2, respectively, were fed a restricted amount of diet so that about 20% weight loss was incurred over a 3-wk period. During restriction, there was considerable loss of body fat in Exp. 1 as indicated by backfat depth, but in Exp. 2 there was little fat loss. There was loss of muscle mass and mass of several internal organs in Exp. 2 (not evaluated in Exp. 1). Beginning at 19 and 21 d in Exp. 1 (37 kg) and 2 (53 kg), respectively, pigs were refed ad libitum to 89 and 91 d, respectively. A comparable group of pigs was fed ad libitum from 1 d to 61 and 63 d, in Exp. 1 and 2, respectively. Refed pigs (RF) exhibited compensatory weight gain, but the rate was only slightly greater than that in pigs fed ad libitum (F). In Exp. 1, RF pigs ate considerably more than F pigs and were fatter, as indicated by ultrasonically determined backfat measurements. Comparative slaughter techniques were used in Exp. 2 so that estimates of muscle mass and internal organ weights could be obtained. In Exp. 2, RF pigs did not eat more than F pigs and were not fatter. The relatively small difference in starting weight and presumed subtle differ- ences in body composition appear to have greatly influenced the physiological response to dietary restriction and subsequent refeeding so that differences in the composition of compensatory growth were observed in the two experiments.

...Compensatory growth had been reported in pigs (Prince et al., 1983; Mersmann et al., 1987 and Kyriazakis et al., 1991)...
...Other growth measurements taken in both stages at weekly interval were body length (BL); as t he length of pigs body from base of tail to base of skull (Mersmann et al., 1987) and height at shoulder (HS) taken as the vertical distance from the floor of restraining cage to the highest point on the shoulder (Lefaucheur et al., 1991)...
...Growth reduction in pigs subjected to various levels of feed or nutrient deprivation has been widely reported in temperate climates (Owen et al., 1971; Wahlshom and Libal, 1983; Donker et al., 1986; Mersmann et al., 1987; Chiba, 1995)...
...Cleveland et al. (1983) and Mersmann et al. (1987) described this level as modest restriction since it caused reduction in fat deposition only with no change in gain of lean...
...Minimal loss in BL was reported by Mersmann et al. (1987) for growing pigs restricted for three weeks...
...However, the re-alimentation growth rates reported by Mersmann et al. (1987) for control and restricted pigs (0.864 vs 1.005 kg/d) were much higher than the rates obtained in the present study...
...The Post ‐ RST rates of increase in BL of 80 and 70% restricted groups (0.35 and 0.33 cm/d) were lower than 0.496 cm/d recorded by Mersmann et al. (1987) for re-fed pigs in the temperate environment...
...These rates were much lower than 3.26 kg/d reported by Owen et al. (1971) for restricted re-alimentated pigs and 3.66 kg/d reported by Mersmann et al. (1987) for restricted re-fed pigs in the temperate environment...

Keywords (15)

COMPENSATORY GROWTH IN FINISHING PIGS AFTER FEED RESTRICTION 1'2,H. J. Mersmann,M. D. MacNeil,S. C. Seideman,W. G. Pond

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Citations (19)

The Effects of Dietary Protein Concentration on Compensatory Growth in Barrows and Gilts1,2 (Citations: 22)

Effect of intermittent starvation on growth and some antioxidant indexes of Macrobrachium nipponense (De Haan) (Citations: 17)

Effect of Protein Restriction in Sows during Gestation and Lactation on Visceral Organ Mass and Serum Hormones Concentration in the Offspring

Effect of restricted postweaning growth resulting from reduced floor and feeder-trough space on pig growth performance to slaughter weight in a wean-to-finish production system1

The growth performance of growing pigs during feed restriction and re-alimentation in a humid tropical environment


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