Economic aspects of persistency of lactation in dairy cattle

Livestock Production Science

Volumn 53, Issue 3, 1998, Pages 237-252

  Dekkers, J C M ^a,c   Ten Hag, J H ^b   Weersink, A ^b  

^a UNIVERSITY OF GUELPH   (Canada)

^b UNIVERSITY OF GUELPH   (Canada)

^c IOWA STATE UNIVERSITY   (United States)

Author keywords

Dairy cattle; Economic values; Lactation curve; Persistency

Indexed keywords

EID: 0001722944     PISSN: 03016226     EISSN: None     Source Type: Journal    
DOI: 10.1016/S0301-6226(97)00124-3     Document Type: Article

References (18)

1. Dekkers, J.C.M., 1991. Estimation of economic values for dairy cattle breeding goals: Bias due to sub-optimal management policies. Livest. Prod. Sci. 29, 131-149.
2. Gengler, N., 1996. Persistency of lactation yields: A review. Proc. International Workshop on Genetic Improvement of Functional Traits in Cattle. Gembloux, Belgium. Interbull Bulletin No. 12. Uppsala, Sweden, pp. 87-96.
3. Goddard, M.E., 1983. Selection indices for non-linear profit functions. Theor. Appl. Genetics 80, 339-344.
4. Jamrozik, J., Schaeffer, L.R., Dekkers, J.C.M., 1996. Genetic evaluation of dairy cattle using test day yields and a random regression model. J. Dairy Sci., (submitted).
5. Korver, S., Van Arendonk, J.A.M., Koops, W.J., 1985. A function for live weight change between two calvings in dairy cattle. Anim. Prod. 40, 233-241.
6. Lean, I.J., Galland, J.C., Scott, J.L., 1989. Relationships between fertility, peak milk yields and lactational persistency in dairy cows. Therio. 31, 1093-1103.
7. National Research Council, 1988. Nutrient requirements of dairy cattle - 6th revised edn. National Academy Press. Washington, DC.
8. Rogers, G.W., Van Arendonk, J.A.M., McDaniel, B.T., 1988. Influence of production and prices on optimum culling rates and annualized net revenue. J. Dairy Sci. 71, 3453-3462.
9. Sadek, M.H., Freeman, A.E., 1992. Adjustment factors for previous and present days open considering all lactations. J. Dairy Sci. 75, 279-287.
10. Schaeffer, L.R., Dekkers, J.C.M., 1994. Random regressions in animal models for test-day production in dairy cattle. Proc. 5th World Congr. Genet. Appl. Livest. Prod., Guelph, ON, XVIII, pp. 443-446.
11. Sölkner, J., Fuchs, W., 1987. A comparison of different measures of persistency with special respect to variation of test-day yields. Livest. Prod. Sci. 16, 305-319.
12. Swalve, H.H., 1995. Genetic relationships between dairy lactation persistency and yield. J. Anim. Breed. Genet. 112.
13. Ten Hag, J.H., 1995. Estimation of the economic value of lactation persistency in dairy cattle. M.Sc. Thesis, University of Guelph, Guelph, ON, Canada.
14. Van Arendonk, J.A.M., 1985. A model to estimate the performance, revenues and costs of dairy cows under different production and price situations. Agric. Systems 16, 157-189.
15. Van Arendonk, J.A.M., Dijkhuizen, A.A., 1985. Studies on the replacement policies in dairy cattle: III. Influence of variation in reproduction and production. Livest. Prod. Sci. 13, 333-349.
16. Van Arendonk, J.A.M., Pieters, T.T., van den Berg, E.G.H.J., Pool, M.M.H., Velthuis, A.A.G.J., 1995. Genetic variation in persistency and its impact on fluctuations in BLUP breeding values for milk production traits. J. Dairy Sci. 78, 249, Suppl. 1.
17. Wiggans, 1996.
18. Wood, P.D.P., 1967. Algebraic model of the lactation curve in cattle. Nature 216, 164-165.