Introduction of bulls at different days postpartum on resumption of ovarian cycling activity in primiparous beef cows

Journal of Animal Science

Volumn 83, Issue 9, 2005, Pages 2106-2110

  Berardinelli, J G ^a   Joshi, P S ^a,b  

^a MONTANA STATE UNIVERSITY   (United States)

^b OHIO STATE UNIVERSITY   (United States)

Author keywords

Biostimulation; Bovine; Bulls; Cycling Activity; Postpartum Interval

Indexed keywords

BOVINAE;

EID: 33645979355     PISSN: 00218812     EISSN: None     Source Type: Journal    
DOI: 10.2527/2005.8392106x     Document Type: Article

References (14)

1. Azzam, S. M., L. A. Werth, J. E. Kinder, M. K. Nielsen. 1991. Distribution of time to first postpartum estrus in beef cattle. J. Anim. Sci. 69:2563-2570.
2. Bellows, R. A., and R. E. Short. 1978. Effects of precalving feed level on birth weight, calving difficulty and subsequent fertility. J. Anim. Sci. 46:1522-1527.
3. Chenoweth, P. J. 1983. Examination of bulls for libido and breeding ability. Vet. Clin. North Am. Large Anim. Pract. 5:59-74.
4. Custer, E. E., J. G. Berardinelli. R. E. Short, M. Wehrman, and R. Adair. 1990. Postpartum interval to estrus and patterns of LH and progesterone in first-calf suckled beef cows exposed to mature bulls. J. Anim. Sci. 68:1370-1377.
5. Fernandez, D., J. G. Berardinelli, R. E. Short, and R. Adair. 1993. Temporal requirement for the presence of mature bulls to alter the postpartum period to resumption of ovarian cycling activity and reproductive performance in first-calf suckled beef cows. Theriogenology 39:411-419.
6. Fernandez, D. L., J. G. Berardinelli, R. E. Short, and R. Adair. 1996. Acute and chronic changes in LH secretion, and postpartum interval to estrus in first-calf suckled beef cows exposed continuously or intermittently to mature bulls. J. Anim. Sci. 74:1098-1100.
7. Fike, K. E., E. G. Bergfeld, A. S. Cupp, F. N. Kojima, V. Mariscal, T. S. Sanchez, M. E. Wehrman, and J. E. Kinder. 1996. Influence of fenceline bull exposure on duration of anoestrus and pregnancy rate in beef cows. Anim. Reprod. Sci. 41:161-167.
8. NRC. 1996. Page 227 in Nutrient Requirements of Beef Cattle. 7th ed. Natl. Acad. Press, Washington, DC.
9. Richards, M. W., J. C. Spitzer, and M. B. Warner. 1986. Effect of varying level of postpartum nutrition and body condition at calving on subsequent reproductive performance in beef cattle. J. Anim. Sci. 62:300-306.
10. Scott, I. C., and G. W. Montgomery. 1987. Introduction of bulls induces return of cyclic ovarian functioning post-partum beef cows. N.Z. J. Agric. Res. 30:189-194.
11. Smeaton, D. C., D. G. McCall, and J. B. Clayton. 1986. Calving date effects on beef cow productivity. Proc. N.Z. Soc. Anim. Prod. 46:149-155.
12. Steel, R. G. D., and J. H. Torrie. 1980. Principles and Procedures of Statistics: A Biometrical Approach. 2nd ed. McGraw-Hill Book Co., New York, NY.
13. Williams, G. L., and M. K. Griffith. 1995. Sensory and behavioural control of gonadotrophin secretion during suckling-mediated anovulation in cows. J. Reprod. Fertil. (Suppl.) 49:463-475.
14. Zalesky, D. D., M. L. Day, M. Garcia-Winder, K. Imakawa, R. J. Kittok, M. J. D'Occhio, and J. E. Kinder. 1984. Influence of exposure to bulls on resumption of estrous cycles following parturition in beef cows. J. Anim. Sci. 59:1135-1139.