PREGNANCY RATES AND BODY MORPHOMETRY IN NELLORE COWS SUBMITTED TO PROGESTERONE AND TEMPORARY WEANING OF CALVES-Reference-Cited by-同舟云学术

PREGNANCY RATES AND BODY MORPHOMETRY IN NELLORE COWS SUBMITTED TO PROGESTERONE AND TEMPORARY WEANING OF CALVES

Published:2015-12-09 Issue:4 Volume:9 Page:348-357
ISSN:2359-6724
Container-title:Revista Brasileira de Engenharia de Biossistemas
language:pt
Short-container-title:

Author:

Chacur M. G. M.¹,Vasconcelos F. F.¹,Dias H. S.¹,Aurélio P. T. F.¹,Gabriel Filho L. R. A.²,Cremasco C. P.²,Putti F. F.³

Affiliation:

1. UNOESTE - Univ do Oeste Paulista, Campus II, Laboratório de Reprodução Animal, São Paulo, Brasil

2. UNESP - Univ Estadual Paulista, Faculdade de Ciências e Engenharia, Campus de Tupã, Laboratório de Matemática Aplicada e Computacional, São Paulo, Brasil

3. UNIFENAS - Univ José do Rosário Vellano, Campus de Alfenas, Minas Gerais, Brasil

Abstract

Body morphometry and temporary weaning (TW) associated to two protocols of fixed-time artificial insemination (FTAI) with intravaginal progesterone releasing device (IPRD) upon pregnancy rates were evaluated. Cows, at 45-59 days post-partum, were randomly divided into group 1 (n=147) and group 2 (n=197). Group 1: received 1g progesterone (IPRD) and 2mg estradiol benzoate on day 0 (EB-D0); 150μg D-cloprostenol on day 7 (PGF-2α-D7); 0,5mg estradiol cypionate and (TW-48 hours) on day 9 (EC+TW-D9); FTAI on day 11 (D11); group 2: IPRD+EB (D0); PGF-2α+EC+TW (72 hours) on D8; FTAI (D11). The pregnancy rate was higher in cows submitted to TW (72 hours) than in cows with TW (48 hours), or rather, 49.74% vs 30.60% (p<0.05). There was a statistical difference (p<0.05) in groups 1 and 2 between pregnant or non-pregnant cows with regard to body weight (412kg vs 400kg and 419kg vs 390kg) and body condition score (BCS) (3.33 vs 3.08 and 3.53 vs 3/32) respectively. Further, 72-hour weaning associated to the applied protocol improved the pregnancy rate. The evaluation of BCS during post-partum may adjust the start of the breeding season.

Funder

Conselho Nacional de Desenvolvimento Científico e Tecnológico

Publisher

Universidade Estadual Paulista - Campus de Tupa

Reference42 articles.

1. BARUSELLI, P. S.; REIS, E. L.; MARQUES, M. O. Inseminação artificial em tempo fixo em bovinos de corte. In: I SIMPÓSIO INTERNACIONAL DE REPRODUÇÃO APLICADA. Londrina. Anais... Londrina, 2004.

2. BARUSELLI, P. S.; REIS, E. L.; MARQUES, M. O.; NASSER, L. F.; BÓ, G. A. The use of hormonal treatments to improve reproductive performance of anestrus beef cattle in tropical climates. Animal Reproduction Science, v. 82-83: 479-486, 2004.

3. BORGES, J. B. S.; GREGORY, R. M. Indução da atividade cíclica ovariana pós-parto em vacas de corte submetidas à interrupção temporária do aleitamento associada ou não ao tratamento com norgestomet-estradiol. Ciência Rural, v. 33(6): 1105-1110, 2003.

4. CACHAPUZ, J. M. A. Experiências com desmame aos 90 e 60 dias. Porto Alegre: EMATER, 1997, 52p.

5. CAIXETA, L. S.; OSPINA, P. A.; CAPEL, M. B.; NYDAM, D. V. The association of subclinical hypocalcemia, negative energy balance and disease with bodyweight change during the first 30 days post-partum in dairy cows milked with automatic milking systems. The Veterinary Journal, v. 204(2): 150-156, 2015.