+ Site Statistics
+ Search Articles
+ Subscribe to Site Feeds
EurekaMag Most Shared ContentMost Shared
EurekaMag PDF Full Text ContentPDF Full Text
+ PDF Full Text
Request PDF Full TextRequest PDF Full Text
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter
Follow on Google+Follow on Google+
Follow on LinkedInFollow on LinkedIn

+ Translate

Effect of feed intake during late development on pubertal onset and resulting body composition in crossbred gilts

Journal of Animal Science 70(12): 3774-3780
Effect of feed intake during late development on pubertal onset and resulting body composition in crossbred gilts
A total of 105 nonboar-exposed, F2 ([Landrace X Yorkshire] X Duroc) gilts were used in two replicates of a randomized complete block experiment to evaluate the effect of dietary feed intake on pubertal onset and subsequent body composition. Feed intakes were established at 50% of ad libitum (AL-50), 75% of ad libitum (AL-75), or at ad libitum (AL-100) levels from 4.5 to 9 mo of age. A corn-soybean meal diet fed to all gilts was formulated to meet or exceed nutrient requirements except for energy. Puberty was measured by two methods: 1) monitored once daily by back pressure applied by the herdsman or 2) from elevated plasma progesterone concentrations. Body composition was evaluated by the deuterium oxide method after plasma progesterone concentrations were elevated. Daily feed intake for the experimental period averaged 1.6, 2.3, and 3.2 kg, and the BW of gilts at 8 mo of age were 111, 131, and 154 kg for the AL-50, AL-75, and AL-100 groups, respectively. Body weight, backfat thickness, and body fat content increased linearly (P < .01) as feed intake increased, but age at puberty was not severely influenced. A minimum body fat content or percentage did not seem to initiate pubertal onset. There was a trend for a lower percentage of the AL-50 gilts to ovulate (P = .08) than those fed the AL-75 and AL-100 intakes. An inverse relationship resulted between the percentage of gilts that ovulated to the percentage that showed behavioral estrus. The percentage of gilts that ovulated was highest and the percentage that showed estrual behavior was lowest as feed intake increased. These data suggest that age had a greater effect on pubertal onset than did BW or body fat content, but energy restriction at approximately 50% of ad libitum levels tended to reduce the onset of ovulation. As feed intakes increased, behavioral estrus was more difficult to detect.

Accession: 002355631

PMID: 1474015

Related references

Effect of feed intake during late development pubertal onset and resulting body composition crossbred gilts. Journal of Animal Science 70(12): 3774-3780, 1992

Effect of feed (energy) intake levels and resulting body composition on pubertal onset in replacement gilts. Ohio Swine Research and Industry Report 1992-1993: 88-94, 1993

The effect of feed intake in late gestation on the body composition and survival of the neonatal pig. Summer 30 66-67, 1976

Effect of propylthiouracil treatment on body composition of broiler breeder males released from feed restriction during pubertal development. Poultry Science 75(SUPPL 1): 48, 1996

Pubertal food intake and body length weight and composition in the feed restricted female rat comparison with well fed animals. Pediatric Research 12((4 PART 1)): 263-267, 1978

The effect of short term high feed intake on the onset of puberty in transported gilts. Swine Health and Production 9(1): 25-27, 2001

Effect of energy restriction on estrous activity and body composition of post pubertal gilts. Journal of Animal Science 67(SUPPL 2): 115-116, 1989

Effect of maternal feed intake on body composition of neonatal rabbits before and after withholding of feed. American Journal of Veterinary Research 28(127): 1837-1841, 1967

Effect of restricted feed intake on early reproductive development in Large White gilts. Asian Australasian Journal of Animal Sciences 14(11): 1534-1541, 2001

The effect of dietary garlic supplementation on body weight gain, feed intake, feed conversion efficiency, faecal score, faecal coliform count and feeding cost in crossbred dairy calves. Tropical Animal Health and Production 42(5): 961-968, 2010