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Titolo:
A note on the effects of calf stimuli on the response of Zebu cows to Synchro-mate-B
Autore:
Quesada, Y; Estrada, S; Cubero, M; Garcia, F; Galina, CS; Molina, R; Orihuela, A;
Indirizzi:
Univ Autonoma Estado Morelos, Fac Ciencias Agropecuarias, Cuernavaca 62051, Morelos, Mexico Univ Autonoma Estado Morelos Cuernavaca Morelos Mexico 62051 elos, Mexico Inst Tecnol Costa Rica, Costa Rica, Mexico Inst Tecnol Costa Rica Costa Rica Mexico Costa Rica, Costa Rica, Mexico Univ Nacl Autonoma Mexico, Fac Med Vet, Dept Reprod, Mexico City 04510, DF, Mexico Univ Nacl Autonoma Mexico Mexico City DF Mexico 04510 y 04510, DF, Mexico
Titolo Testata:
APPLIED ANIMAL BEHAVIOUR SCIENCE
fascicolo: 3, volume: 71, anno: 2001,
pagine: 183 - 189
SICI:
0168-1591(20010302)71:3<183:ANOTEO>2.0.ZU;2-H
Fonte:
ISI
Lingua:
ENG
Soggetto:
PROLONGS POSTPARTUM ANOVULATION; SUCKLING-MEDIATED ANOVULATION; OVARIAN ACTIVITY; BOS-INDICUS; ESTROUS BEHAVIOR; BEEF-CATTLE; SYNCHRONIZATION; ESTRUS; PROGESTERONE; FERTILITY;
Keywords:
cattle-reproduction; weaning; sexual behavior; progestagen; Zebu;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
27
Recensione:
Indirizzi per estratti:
Indirizzo: Orihuela, A Univ Autonoma Estado Morelos, Fac Ciencias Agropecuarias, Apartado Postal 5-78, Cuernavaca 62051, Morelos, Mexico Univ Autonoma Estado Morelos Apartado Postal 5-78 Cuernavaca Morelos Mexico 62051
Citazione:
Y. Quesada et al., "A note on the effects of calf stimuli on the response of Zebu cows to Synchro-mate-B", APPL ANIM B, 71(3), 2001, pp. 183-189

Abstract

The effect of Synchro-mate-B (SMB) was measured on the estrous 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) for48 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 estrous for eachgroup. All animals were observed continuously for mounting activity during72 h after SMB implant removal. A significant difference (P < 0.05) in estrous response was found between SMB-treated and non-treated animals, regardless of calf management (56 versus 8%, respectively). Cows with SMB + CCR and SMB + CPR came into estrous sooner (P < 0.05) (26.5 +/- 2.6 and 18.1 +/-4.94 h, respectively), than those that remained with their calf present (40.4 +/- 12.8 h). Cows with SMB + CCR displayed longer (P < 0.05) periods ofmounting behavior (13.0 +/- 4.4 h) in comparison with SMB + CPR and SMB + CP (7.4 +/- 1.8 and 8.1 +/- 4.0 h), respectively. Furthermore, 84% (P < 0.05) of the cows in the SMB + CCR had high concentrations of progesterone after mounting behavior was displayed, in comparison with 68 and 54% in the other two groups, respectively. No difference was found (P > 0.05) in the number of mounts per hour in estrous. It was concluded that: (1) SMB increasesthe number of cows that display estrous; (2) temporary weaning shortens the period from SMB implant withdrawal to mounting activity, and (3) SMB + CCR, increases the length of sexual receptivity and the number of cows that continue to cycle. (C) 2001 Elsevier Science B.V. All rights reserved.

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Documento generato il 19/09/20 alle ore 21:52:02