Reproductive performance of outdoor sow herds

Livestock Production Science

Volumn 78, Issue 3, 2002, Pages 233-243

  Larsen, V Aa ^a,b   Jorgensen E ^a  

^a DANISH INSTITUTE OF AGRICULTURAL SCIENCES   (Denmark)

^b Natl Committee for Pig Production   (Denmark)

Author keywords

Field data; Herd; Herd management; Parity; Pig reproduction; Production system; Registrations; Season

Indexed keywords

EID: 0037146842     PISSN: 03016226     EISSN: None     Source Type: Journal    
DOI: 10.1016/S0301-6226(02)00099-4     Document Type: Article

References (40)

1. Arey, D., Edwards, S.A., 1998. Factors influencing aggression between sows after mixing and the consequences for welfare and production. Livest. Prod. Sci. 56, 61-70.
2. Berger, F., Dagorn, J., Le Denmat, M., Quillien, J.P., Vaudelet, J.C., Signoret, J.P., 1997. Perinatal losses in outdoor pig breeding. A survey of factors influencing piglet mortality. Annales de Zootechnie 46, 321-329.
3. Box, G.E.P., Hunter, W.G., Hunter, J.S., 1978. Statistics For Experimenters. An Introduction to Design, Data Analysis and Model Building. Wiley, New York.
4. Chamberlain, T.S., Hughes, P.E., 1996. The influence of mating frequency and nutrition on the stimulus value of boars. Anim. Reprod. Sci. 43 (2-3), 151-160.
5. Claus, R., Schopper, D., Wagner, H.-G., 1983. Seasonal effect on steroids in blood plasma and seminal plasma of boars. J. Steroid Biochem. 19 (1), 725-729.
6. Claus, R., Schopper, D., Wagner, H.-G., Weller, U., 1985. Photo-periodic influences on reproduction of domestic boars. I. Light influences on testicular steroids in peripheral blood plasma and seminal plasma. Zbl. Vet. Med. A 32, 86-98.
7. Dial, G.D., Xue, J.L., 1993. Seasonal patterns of swine reproduction. Pig Sense 2 (3), 1-5.
8. Dove, C.R., Haydon, K.D., 1994. The effect of various diet nutrient densities and electrolyte balances on sow and litter performance during two seasons of the year. J. Anim. Sci. 72 (5), 1101-1106.
9. Grigoriadis, D., Edwards, S.A., English, P.R., Davidson, F.M., 2000. The reproductive behaviour of pigs in a dynamic service system for gilts. Appl. Anim. Behav. Sci. 46 (3), 203-216.
10. Hemsworth, P.H., Salden, N.T.C.J., Hoogerbrugge, A., 1982. Influence of the post-weaning social environment on the weaning to mating interval of the sow. Anim. Prod. 35, 41-48.
11. Hemsworth, P.H., Winfield, C.G., Hansen, C., 1983. High mating frequency for boars: Predicting the effect on sexual behaviour, fertility and fecundity. Anim. Prod. 37, 409-413.
12. Hughes, P.E., 1994. The role of contact frequency in modifying the efficacy of boar effect. Anim. Reprod. Sci. 35, 273-280.
13. Jørgensen, E., 2002. Circadian Variation. Estimation of Time at Maximum. Biometry Research Unit, Danish Institute of Agricultural Sciences. Internal Report 2002-01, 18 pp.
14. Koketsu, Y., Dial, G.D., King, V.L., 1997. Returns to service after mating and removal of sows for reproductive reasons on commercial farms. Theriogenology 47, 1445-1461.
15. Kongsted, A.G., Larsen, V.A., Kristensen, I.S., 2000. Frilandssohold - Resultater fra gårdstudier [Outdoor sow herds - Results from farm studies] 1998. DIAS Report (Livestock), No 15, 100 pp.
16. Knox, R.V., Zas, S.L.R, 2001. Factors influencing estrus and ovulation in weaned sows as determined by transrectal ultrasound. J. Anim. Sci. 79, 2957-2963.
17. Larsen, V.A., 2000. Flexibility of outdoor pig production systems - An opportunity to be explored in a herd model. In: Plà, L.M., Pomar, J. (Eds.), Proceedings of the International Symposium on Pig Herd Management Modelling and Information Technologies Related, pp. 47-59.
18. Lucia, Jr. T., Dial, G.D., Marsh, W.E., 2000. Lifetime reproductive performance in female pigs having distinct reasons for removal. Livest. Prod. Sci. 63, 213-222.
19. MLC, 2001. Pig Yearbook 2001, 84 pp.
20. Mortensen, B., Ruby, V., Pedersen, B.K., Smidth, J., Larsen, V.A., 1994. Outdoor pig production in Denmark. Pig News Inform. 15 (4), 117-120.
21. Nelson, W., Tong, Y.L., Lee, J.-K., Halberg, F., 1979. Methods for cosinor-rhythmometry. Chronobiologia 6, 305-323.
22. Perera, A.N.M., Hacker, R.R., 1984. The effects of different photoperiods on reproduction in the sow. J. Anim. Sci. 58 (6), 1418-1422.
23. Prunier, A., Dourmad, J.Y., Etienne, M., 1994. Effect of light regimen under various ambient temperatures on sow and litter performance. J. Anim. Sci. 72, 1461-1466.
24. Prunier, A., Quesnel, H., Messias de Braganca, M., Kermabon, A.Y., 1996. Environmental and seasonal influences on the return-to-oestrus after weaning in primiparous sows: A review. Livest. Prod. Sci. 45, 103-110.
25. Rydhmer, L., 2000. Genetics of sow reproduction, including puberty, oestrus, pregnancy, farrowing and lactation. Livest. Prod. Sci. 66, 1-12.
26. SAS Institute Inc., 1990. SAS/STAT User's Guide, Cary, NC.
27. Scott, D.W., 1992. Multivariate Density Estimation. Theory, Practice and Visualization. Wiley, New York.
28. Spitschak, K., 1997. Fruchtbarkeits- und aufzuchtleistungen von sauen mit ferkeln in der freilandhaltung. Arch. Tierz. Dummerstorf 40 (2), 123-134.
29. Stansbury, W.F., McGlone, J., Tribble, L.F., 1987. Effects of season, floor type, air temperature and snout coolers on sow and litter performance. J. Anim. Sci. 65, 1507-1513.
30. Steen, H.A.M.V.D., 1994. Genotypes for outdoor production. Pig News Inform. 15 (4), 129-130.
31. Sterning, M., Rydhmer, L., Eliasson, L., Einarsson, S., Andersson, K., 1990. A study on primiparous sows of the ability to show standing oestrus and to ovulate after weaning. Influences of loss of body weight and backfat during lactation and of litter size, litter weight gain and season. Acta Vet. Scand. 31 (2), 227-236.
32. Tanida, H., Murata, Y., Tanaka, T., Yoshimoto, T., 1989. Mounting efficiencies, courtship behaviour and mate preference of boars under multi-sire mating. Appl. Anim. Behav. Sci. 22, 245-253.
33. ten Napel, J., de Vries, A.G., Buiting, G.A.J., Luiting, P., Merks, J.W.M., Brascamp, E.W., 1995. Genetics of the interval from weaning to estrus in first-litter sows: Distribution of data, direct response of selection and heritability. J. Anim. Sci. 73, 2193-2203.
34. ten Napel, J., Johnson, R., 1997. Genetic relationships among production traits and rebreeding performance. J. Anim. Sci. 75, 51-60.
35. ten Napel, J., Meuwissen, T.H.E., Johnson, R.K., Brascamp, E.W., 1998. Genetics of the interval from weaning to estrus in first-litter sows: Correlated responses. J. Anim. Sci. 76, 937-947.
36. Tholen, E., Bunter, K.L., Hermesch, S., Graser, H.-U., 1996a. The genetic foundation of fitness and reproduction traits in Australian pig populations. 1 Genetic parameters for weaning to conception interval, farrowing interval and stayability. Aust. J. Agric. Res. 47, 1261-1274.
37. Tholen, E., Bunter, K.L., Hermesch, S., Graser, H.-U., 1996b. The genetic foundation of fitness and reproduction traits in Australian pig populations. 2. Relationships between weaning to conception interval, farrowing interval, stayability, and other common reproduction and production traits. Aust. J. Agric. Res. 47, 1275-1290.
38. Vesseur, P.C., Kemp, B., den Hartog, L.A., 1994. Factors affecting the weaning-to-estrus interval in the sow. J. Anim. Physiol. Anim. Nutr. 72, 225-233.
39. Weitze, K.F., Wagner-Rietschel, H., Waberski, D., Richter, L., Krieter, J., 1994. The onset of heat after weaning, heat duration, and ovulation as major factors in AI timing in sows. Reprod. Dom. Anim. 29, 433-443.
40. Whittemore, C.T., 1983. The Science and Practice of Pig Production. Longman, Harlow.