+ Site Statistics
+ Search Articles
+ PDF Full Text Service
How our service works
Request PDF Full Text
+ Follow Us
Follow on Facebook
Follow on Twitter
Follow on LinkedIn
+ Subscribe to Site Feeds
Most Shared
PDF Full Text
+ Translate
+ Recently Requested

The effects of food intake during lactation and post weaning on the reproductive performance and hormone and metabolite concentrations of primiparous sows



The effects of food intake during lactation and post weaning on the reproductive performance and hormone and metabolite concentrations of primiparous sows



Animal Science 63(2): 297-306



The objective of this study was to investigate the effect of low food intake on post-weaning fertility and hormone concentrations in primiparous sows. One hundred and forty primiparous sows (Landrace times Large White) were randomly assigned to one of four treatment groups: (A) restricted to 3 kg food per day during lactation and 2 kg food per day post weaning (no. = 36); (B) restricted to 3 kg food per day during lactation and ad libitum feeding post weaning (no. = 33); (C) ad libitum feeding throughout with a mean voluntary food intake of 3.7 kg/day during lactation (no. = 36); and (D) ad libitum feeding throughout with a mean voluntary food intake of 4.9 kg/day during lactation (no. = 35). Litters were standardized at eight to 10 pigs at 2 days post partum and were weaned at 27.2 (s.e. 0.5) days post partum. After weaning, sows were observed twice daily for signs of oestrus and were mated on the day(s) of standing oestrus. Six sows from each group were fitted with indwelling jugular cannulae 2 days before weaning. Blood samples were collected 1 day before weaning (W-1), 1 day after weaning (W+1) and 4 days after weaning (W+4), and these sows were slaughtered on W+4. Ovaries were recovered follicles and corpora lutea were counted, and follicular fluid collected. Sows given food at a restricted level (groups A and B) lost more backfat during lactation than sows given food ad libitum (groups C and D) (P lt 0.01). Piglet weaning weights, weaning to conception intervals and the proportion of sows ovulating by W+4 were not significantly different among groups. In sows that did not ovulate, numbers of large follicles were not significantly different among groups but the low food intake (groups A, B and C) sows had more medium-sized follicles than high food intake (group D) sows (P lt 0.01). Follicular fluid concentrations of oestradiol, progesterone and insulin-like growth factor-1 (IGF-1) did not differ among groups (P gt 0.05). Plasma non-esterified fatty acids concentrations were greater in groups C and D than in groups A and B on W-1, W+1 and W+4. Serum insulin and plasma glucose concentrations were lower in groups C and D than in groups A and B on W-1 and W+1, but were similar among groups on W+4. Serum growth hormone concentrations were lower in group D than group A and B on W-1 and W+1 but not W+4. Concentrations of IGF-1 in serum were greater in groups C and D than groups A and B on W-1 and W+1 but not W+4. It is concluded that low food intakes during lactation and post weaning affected body condition, serum hormones and metabolites and ovarian function of primiparous sows without dramatically affecting ovarian hormones or reproductive performance.

Please choose payment method:






(PDF emailed within 0-6 h: $19.90)

Accession: 002984911

Download citation: RISBibTeXText

DOI: 10.1017/s1357729800014855


Related references

Influence of lactation length and feed intake on reproductive performance and blood concentrations of glucose, insulin and luteinizing hormone in primiparous sows. Animal Reproduction Science 52(2): 153-163, 1998

Effects of source of energy and energy intake during lactation on reproductive performance and serum hormone concentrations of sows following weaning. Dissertation Abstracts International, B Sciences and Engineering 44(11): 3251, 1984

Influence of imposed feed intake patterns during lactation on reproductive performance and on circulating levels of glucose, insulin, and luteinizing hormone in primiparous sows. Journal of Animal Science 74(5): 1036-1046, 1996

Effects of dietary lysine intake during lactation on blood metabolites, hormones, and reproductive performance in primiparous sows. Journal of Animal Science 78(4): 1001-1009, 2000

Plasma hormone and metabolite concentrations and the interval from weaning to oestrus in primiparous sows. Animal Reproduction Science 36(3-4): 261-279, 1994

Effects of dietary lysine intake during lactation on reproductive performance, blood borne metabolites and hormones in primiparous sows. Journal of Animal Science 77(Suppl. 1): 68, 1999

Effects of breeding at the second oestrus or after post-weaning hormonal treatment with altrenogest on subsequent reproductive performance of primiparous sows. Reproduction in Domestic Animals 46(5): 818-823, 2011

The effects of post-weaning progestagen treatment (Regumate) of early-weaned primiparous sows on subsequent reproductive performance. Animal Reproduction Science 52(1): 71-79, 1998

Postpartum hypophagia in primiparous sows. I. Effects of gestation feeding level on feed intake, feeding behavior, and plasma metabolite concentrations during lactation. Journal of animal science 72(2): 387-394, 1994

Clinical and endocrinological studies in lactating and post-weaning primiparous sows. Effects of weight loss during lactation and of changes in management at weaning. Clinical and endocrinological studies in lactating and post weaning primiparous sows Effects of weight loss during lactation and of changes in management at weaning: 178 pp., 1992

Influence of lactation feed intake on the relationship between lactation length and reproductive performance, circulating levels of glucose, insulin and LH in primiparous sows. Journal of Animal Science 75(Suppl. 1): 76, 1997

Effects of lysine intake during late gestation and lactation on blood metabolites, hormones, milk composition and reproductive performance in primiparous and multiparous sows. Animal Reproduction Science 112(3-4): 199-214, 2009

Influence of cumulative feed intake during early and mid-lactation on luteinizing hormone secretion and weaning-to-estrus interval in primiparous sows. Journal of Veterinary Medical Science 61(4): 325-329, 1999

Effects of dietary energy and lysine intake during late gestation and lactation on blood metabolites, hormones, milk composition and reproductive performance in primiparous sows. Canadian Journal Of Animal Science: 2, 247-255, 2008

Effects of dietary energy and lysine intake during late gestation and lactation on blood metabolites, hormones, milk compositions and reproductive performance in primiparous sows. Canadian Journal of Animal Science 88(2): 247-255, 2008