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A note on the effects of calf stimuli on the response of Zebu cows to Synchro-mate-B

By Y. Quesada, S. Estrada, M. Cubero, F. Garcia, C. S. Galina, R. Molina, A. Orihuela

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Abstract

The effect of Synchro-mate-B (SMB, ear implant containing 6 mg norgestomet) was measured on the oestrous response and the establishment of cyclicity using different calf stimuli. Multiparous Zebu cows, were divided in three groups. In the first, 32 animals were treated with SMB leaving the calves present (SMB + CP). In the second, 33 cows were treated with SMB and calves partially removed (fence-line contact) for 48 h (SMB + CPR). In the third group (n = 33), cows received SMB and calves were removed for 48 h (SMB + CCR) with no visual or olfactory contact. A control group (CG, n = 33) involved neither SMB or calf separation. Blood samples for progesterone assessment were obtained at 11 and 4d prior to SMB treatment and on days 7 and 11 after the average return to oestrous for each group. All animals were observed continuously for mounting activity during 72 h after SMB implant removal. A significant difference (P < 0.05) in oestrous response was found between SMB-treated and non-treated animals, regardless of calf management (56 versus 8

Date 2001
Publication Title Applied Animal Behaviour Science
Volume 71
Issue 3
Pages 183-189
ISBN/ISSN 0168-1591
DOI 10.1016/S0168-1591(00)00178-7
Language English
Author Address Instituto Tecnologico de Costa Rica, Costa Rica.
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Tags
  1. Anestrus
  2. Animal behavior
  3. Animal physiology
  4. Animal reproduction
  5. Biotechnology
  6. Calves
  7. Cattle
  8. Central America
  9. Costa Rica
  10. Developed countries
  11. Estrous cycle
  12. Latin America
  13. Mammals
  14. peer-reviewed
  15. Progestogens
  16. Ruminants
  17. Sexual behavior
  18. sexuality
  19. Sexual practices
  20. steroids
  21. suckling
  22. Threshold Countries
  23. United States of America
  24. weaning
Badges
  1. peer-reviewed