Analysis of environmental effects on test day milk yields of Sarda dairy ewes

Journal of Dairy Science

Volumn 82, Issue 10, 1999, Pages 2212-2217

  Macciotta, N P P ^a   Cappio Borlino, A ^a   Pulina, G ^a  

^a UNIVERSITY OF SASSARI   (Italy)

Author keywords

Factor analysis; Sheep lactation curves; Test day

Indexed keywords

OVIS; OVIS ARIES; SARDA;

ALTITUDE; ANIMAL; ARTICLE; ENVIRONMENT; FEMALE; ITALY; LACTATION; PARITY; PHYSIOLOGY; PREGNANCY; SHEEP; STATISTICAL MODEL;

ALTITUDE; ANIMALS; ENVIRONMENT; FEMALE; ITALY; LACTATION; LINEAR MODELS; PARITY; PREGNANCY; SHEEP;

EID: 0033212134     PISSN: 00220302     EISSN: None     Source Type: Journal    
DOI: 10.3168/jds.S0022-0302(99)75467-6     Document Type: Article

References (40)

1. Ali, T. E., and L. R. Schaeffer. 1987. Accounting for covariances among test day milk yields in dairy cows. Can. J. Anim. Sci. 67:637-644.
2. Baro, J. A., J. A. Carriedo, and F. San Primitivo. 1994. Genetic parameters of test day measures for somatic cell count, milk yield, and protein percentage of milk ewes. J. Dairy Sci. 77:2658-2662.
3. Bencini, R., and G. Pulina. 1997. The quality of sheep milk: a review. Aust. J. Exp. Agric. 37:485-504.
4. Benyoucef, M. T., and A. Ayachi. 1991. Mesure de la production laitiere de la brebis Hamra durant les phases d'allaitement et de traite. Ann. Zootech. 40:1-7.
5. Brandano, P., G. Pulina, and S.P.G. Rassu. 1997. La razza ovina sarda in Sardegna (Sheep sarda breed in Sardegna). Pages 39-55 in Caratteristiche Morfologiche, Funzionali e Biologiche delle Popolazioni Animali Valutate con Metodologie e Tecniche Diverse ai Fini del Miglioramento Genetico (Morphological, functional and biological characteristics of livestock evalued with different methodologies and techniques for the genetic improvement). Panico Edizioni, Galatina (Lecce), Italy.
6. Cappio-Borlino, A., N.P.P. Macciotta, and G. Pulina. 1997. The shape of Sarda ewe lactation curve analyzed with a compartmental model. Livest. Prod. Sci. 51:89-96.
7. Cappio-Borlino, A., B. Portolano, M. Todaro, N.P.P. Macciotta, P. Giaccone, and G. Pulina. 1997. Lactation curves of valle del belice dairy ewes for milk, fat, and protein estimated with test day models. J. Dairy Sci. 80:3023-3029.
8. Cappio-Borlino, A., G. Pulina, and G. Rossi. 1995. A non-linear modification of Wood's equation fitted to lactation curves of Sardinian dairy ewes. Small Ruminant Res. 18:75-79.
9. Carta, A., S. R. Sanna, and S. Casu. 1995. Estimating lactation curves and seasonal effects for milk, fat, and protein in Sarda dairy sheep with a test day model. Livest. Prod. Sci. 44:37-44.
10. Casoli, C., E. Duranti, L. Morbidini, F. Panella, and V. Vizioli. 1989. Quantitative and compositional variations of massese sheep milk by parity and stage of lactation. Small Ruminant Res. 2:47-62.
11. Cerny, B. A., and H. F. Kaiser. 1977. A study of a measure of sampling adequacy for factor analytic correlation matrices. Multivar. Behav. Res. 12:43-17.
12. de la Fuente, L. F., F. San Primitivo, J. A. Fuertes, and C. Gonzalo. 1997. Daily and between-milking variations and repeatabilities in milk yield, somatic cell count, fat and protein of dairy ewes. Small Ruminant Res. 24:133-139.
13. Enevoldsen, C., J. Hindhede, and T. Kristensen. 1996. Dairy herd management type assessed from indicators of health, reproduction, replacement and milk production. J. Dairy Sci. 79:1221-1236.
14. Gabina, F., F. Arrese, J. Arranz, and I. Beltran De Heredia. 1993. Average milk yields and environmental effects on latxa sheep. J. Dairy Sci. 76:1191-1198.
15. Gonzalo, C., J. A. Carriedo, A. Baro, and F. San Primitivo. 1994. Factors influencing variation of test day milk yield, somatic cell count, fat, and protein in dairy sheep. J. Dairy Sci. 77:1537-1542.
16. Grossman, M., and W. J. Koops. 1988. Multiphasic analysis of lactation curves in dairy cattle. J. Dairy Sci. 71:1598-1608.
17. Istituto Centrale di Statistica. 1992. Censimento generale dell'Agricoltura (General census of Agriculture). Istituto Poligrafico dello Stato, Rome, Italy.
18. Jamrozik, J., and L. R. Schaeffer. 1997. Estimates of genetic parameters for a test day model with random regressions for yield traits of first lactation holsteins. J. Dairy Sci. 80:762-770.
19. Kendall, M. G., and A. Stuart. 1966. The advanced theory of statistics. Charles Griffin & Co. Ltd., London, United Kingdom.
20. Morrison, D. F. 1976. Multivariate statistical methods. McGraw-Hill, New York, NY.
21. Pagnacco, G., R. Rizzi, F. Miglior, and M. Zanotti Casati. 1989. Produzione di latte e numero di nati nella pecora delle Langhe: ripetibilità e correlazioni (Milk production and number of lambs born in Delle Langhe ewes: repeatability and correlations). Zootec. Nutr. Anim. 15:171-174.
22. Pander, B. L., W. G. Hill, and R. Thompson. 1992. Genetic parameters of test day records of British Holstein-Friesian heifers. Anim. Prod. 55:11-21.
23. Portolano, B., F. Pilla, P. Giaccone, and M. Todaro. 1997. La produzione massima al controllo per la stima della capacità produttiva degli ovini da latte (The use of the peak yield to estimate productive ability of dairy sheep). Pages 111-112 in Proc. 12th Meet. Ital. Sci. Soc. Anim. Prod., Pisa, Italy.
24. Portolano, B., M. Todaro, F. Spatafora, G. Bono, S. Margiotta, P. Giaccone, and V. Ortoleva. 1996. Confronto fra due differenti modelli della curva di lattazione in pecore da latte di razza Comisana (Comparison between two different lactation curve models in dairy Comisana ewes). Zootec. Nutr. Anim. 22:323-331.
25. Ptak, E., and L. R. Schaeffer. 1993. Use of test day yields for genetic evaluations of dairy sires and cows. Livest. Prod. Sci. 34:23-34.
26. Pulina, G., S.P.G. Rassu, and A. Cannas. 1993. L'influenza della tecnica di alimentazione per gruppi sulla produzione lattea negli ovini (The influence of group feeding strategy on ewe milk production.) Pages 2003-2006 in Proc. 47th Conf. Italian Soc. Vet. Sci., Riccione, Italy.
27. Ricordeau, G., and R. Denamur. 1962. Production laitiere des brebis prealpes du sud pendant les phases dall'allaitement de sevrage et de traite. Ann. Zootech. 11:5-38.
28. Rizzi, R., D. Sinna, P. Bolla, and A. Caroli. 1995. Analisi della curva di lattazione della pecora di razza sarda (Analysis of lactation curve in sarda ewe breed). Proc. Nat. Conf. "Parliamo di produzione e tresformazione di latte" ("Let's talk about production and manufacturing of milk"), Fossano (Cuneo), Italy, October 19-20. 1995:203-206.
29. Rook, A., J. France, and M. S. Danhoa. 1993. On the mathematical description of lactation curves. J. Agric. Sci. Camb. 121:97.
30. Sakul, H., and W. Boylan. 1992. Lactation curves for several US sheep breeds. Anim. Prod. 54:229-233.
31. Sanna, S. R., A. Carta, and S. Casu. 1998. Valutazione genetica degli arieti di razza Sarda in differenti condizioni di allevamento. (Genetic evaluation of Sarda rams in different conditions of production). Proc. 12th Mtg. Ital. Soc. Path. Hus. Sheep and Goats:320-324.
32. SAS® User's Guide: Statistics, Version 6.09 Edition. 1989. SAS Inst., Inc., Cary NC.
33. Snowder, G. D., and H. A. Glimp. 1990. Influence of breed, number of suckling lambs and stage of lactation on ewe milk production and lamb growth under range condition. J. Anim. Sci. 69:923-930.
34. Stanton, T. L., L. R. Jones, R. W. Everett, and S. D. Kachman. 1992. Estimating milk, fat, and protein lactation curves with a test day model. J. Dairy Sci. 75:1691-1700.
35. Swalwe, H. H. 1995. The effect of test day models on the estimation of genetic parameters and breeding values for dairy yield traits. J. Dairy Sci. 78:929-938.
36. Torres Hernandez, G., and W. D. Hohenboken. 1980. Biometric properties of lactations in ewes raising single or twin lambs. Anim. Prod. 30:431-436.
37. Van Arendonk, J.A.M., and E. Fimland. 1983. Comparison of two methods to extend partial milk record. Z. Tierz. Zuechtungsbiol. 100:33-38.
38. Vargas, B., E. Perez, and J.A.M. Van Arendonk. 1998. Analysis of test day yield data of Costa Rican dairy cattle. J. Dairy Sci. 81:255-263.
39. Wilmink, J.B.M. 1987. Comparison of different methods of predicting 305-day milk yield using means calculated from within-herd lactation curves. Livest. Prod. Sci. 17:1-17.
40. Wood, P.D.P. 1967. Algebraic model of the lactation curve in cattle. Nature (Lond.) 216:164-165.