Environmental factors on the probability of pregnancy in early or conventionally weaned beef cows
Ricardo Zambarda Vaz; José Fernando Piva Lobato; Javier Alexander Bethancourt-Garcia; Rangel Fernandes Pacheco; Nathália Pasi Reis; Dayana Bernardi Sarzi Sartori; Sabrina Amália Jappe; João Restle
Abstract
Keywords
References
Alforma AMP, Pereira GR, Rocha MK, Teixeira OS, Oliveira MCM, Lima JA, Cumbe TA, Barcellos JOJ. Influence of weaning management at 30, 75 and 180 days of age on non‐esterified fatty acids and reproductive performance in beef cows. J Anim Physiol Anim Nutr. 2023;107(2):407-17.
Alvares CA, Stape JL, Sentelhas PC, Gonçalves JLM, Sparovek G. Köppen’s climate classification map for Brazil. Meteorol Z. 2013;22(6):711-28.
Baumgard LH, Collier RJ, Bauman DEA. 100-year review: regulation of nutrient partitioning to support lactation. J Dairy Sci. 2017;100(12):10353-66.
Bitencourt MF, Cerdótes L, Restle J, Costa PT, Fernandes TA, Ferreira OGL, Silveira DD, Vaz RZ. Age and calving time effects production efficiency of beef cows and their calves. An Acad Bras Cienc. 2020;92(Suppl1):e20181058.
Camargo VA, Sessim AG, Pereira GR, Teixeira OS, Alforma AMP, Rocha MK, Barcellos JOJ. Bioeconomic assessment of three ages at weaning in cow-calf systems. Livest Sci. 2022;263(1):105032.
Cooke RF, Lamb GC, Vasconcelos JLM, Pohler KG. Effects of body condition score at initiation of the breeding season on reproductive performance and overall productivity of Bos taurus and B. indicus beef cows. Anim Reprod Sci. 2021;232(1):106820.
Díaz R, Galina CS, Rubio I, Corro M, Pablos JL, Rodríguez A, Orihuela A. Resumption of ovarian function, the metabolic profile and body condition in Brahman cows (Bos indicus) is not affected by the combination of calf separation and progestogen treatment. Anim Reprod Sci. 2017;185(1):181-7.
Diskin MG, Mackey DR, Roche JF, Sreenan JM. Effects of nutrition and metabolic status on circulating hormones and ovarian follicle development in cattle. Anim Reprod Sci. 2003;78(3-4):345-70.
Farias GD, Cerdótes L, Restle J, Pascoal LL, Costa PT, Ferreira OGL, Vaz RZ. Body size and its effects on productive efficiency of cows with predominant Nellore genetic composition. Acta Sci Anim Sci. 2018;40(1):42532.
Hosmer D, Lemeshow WS, Sturdivant RX. Applied logistic regression. 3rd ed. New York: John Wiley & Sons; 2013. Wiley Series in Probability and Statitics. http://dx.doi.org/10.1002/9781118548387.
Khalaf G, Iguernane M. Multicollinearity and a ridge parameter estimation approach. J Mod Appl Stat Methods. 2016;15(2):400-10.
Lowman BGN, Scott NA, Somerville SH. Condition scoring of cattle. Edinburgh: The Edinburgh School of Agriculture; 1976.
Martins PGMA, Arthington JD, Cooke RF, Lamb CG, Araújo DB, Torres CAA, Guimarães JD, Mancio AB. Evaluation of beef cow and calf separation systems to improve reproductive performance of first-calf cows. Livest Sci. 2012;150(1-3):74-9.
Montiel F, Ahuja C. Body condition and suckling as factors influencing the duration of postpartum anestrus in cattle: a review. Anim Reprod Sci. 2005;85(1-2):1-26.
Moura ICF, Kuss F, Moletta JL, Menezes LFGD, Henrique DS, Lipinski LC, Martins ADS. Desempenho de vacas de corte Purunã submetidas a diferentes manejos de amamentação. Pesqui Agropecu Bras. 2014;49(1):49-56.
Orihuela A, Galina CS. Effects of separation of cows and calves on reproductive performance and animal welfare in tropical beef cattle. Animals. 2019;9(5):223-31.
Pacheco RF, Restle J, Brondani IL, Alves DC Fo, Cattelam J, Mayer AR, Martini APM, Machado DS. Calving probability in the first and second reproductive years of beef heifers that reached the recommended body weight at first breeding season. Rev Bras Zootec. 2020;49(1):e20190115.
Pacheco RF, Vaz RZ, Restle J, Silveira MF, Cerdotes L, Teixeira JS, Milani L, Pacheco PS. Probability of pregnancy in beef cows with early-weaned calves. Livest Sci. 2022;257(1):104854.
Pravia MI, Ravagnolo O, Urioste JI, Garrick DJ. Identification of breeding objectives using a bioeconomic model for a beef cattle production system in Uruguay. Livest Sci. 2014;160(1):21-8.
Shoup LM, Kloth AC, Wilson TB, González-Peña D, Ireland FA, Rodriguez-Zas S, Felix TL, Shike DW. Prepartum supplement level and age at weaning: I. Effects on pre-and postpartum beef cow performance and calf performance through weaning. J Anim Sci. 2015;93(10):4926-35.
Silveira MF, Restle J, Alves DC Fo, Missio RL, Donicht PAMM, Segabinazzi LR, Callegaro AM, Joner G. Suplementação com gordura protegida para vacas de corte desmamadas precocemente mantidas em pastagem natural. Arq Bras Med Vet Zootec. 2014;66(3):809-17.
Ungerfeld R, Hotzel MJ, Scarsi A, Quintans G. Behavioral and physiological changes in early‐weaned multiparous and primiparous beef cows. Animal. 2011;5(8):1270-5.
Vaz RZ, Cerdótes L, Nuñez AJC, Sartori DBS, Pacheco RF, Silva HR, Bethancourt-Garcia JA, Restle J. Body mass index at calving on performance and efficiency of Charolais cow herds. Trop Anim Health Prod. 2022a;54(3):168.
Vaz RZ, Cerdótes L, Pacheco RF, Sartori DBS, Lucas JD, Agner HSS, Restle J. Body mass index at calving on performance and efficiency of Zebu cow herds. Semin Ciênc Agrár. 2022b;43(1):197-210.
Vaz RZ, Lobato JFP, Restle J, Conceição VGD, Ferreira OGL, Costa JLB, Eloy LR. Performance of calves born in different periods of the calving season in intensive beef cattle farming. Arq Bras Med Vet Zootec. 2020a;72(5):1874-80.
Vaz RZ, Lobato JFP, Restle J, Costa PT, Eloy LR, Ferreira OGL, Costa JLB. Calving month and calf sex on the production and efficiency of herds. Cienc Anim Bras. 2020b;21(1):e-61977.
Vaz RZ, Lobato JFP, Restle J, Costa PT, Ferreira OGL, Garcia JAB, Eloy LR, Costa JLB. Effect of live weight of beef cows on calf production efficiency. Res Soc Dev. 2020c;9(9):e679007632.
Vaz RZ, Lobato JFP, Restle J. Productivity and efficiency of cow herds submitted to two weaning ages. Rev Bras Zootec. 2010;39(8):1849-56.
Vaz RZ, Lobato JFP. Effects of the weaning age of calves on somatic development and on reproductive performance of beef cows. Rev Bras Zootec. 2010;39(5):1058-67.
Vieira A, Lobato JFP, Correa ES, Torres RAA Jr, Cezar IM. Produtividade e eficiência de vacas Nelore em pastagem de Brachiaria decumbens Stapf nos Cerrados do Brasil Central. Rev Bras Zootec. 2005;34(4):1357-65.
Submitted date:
04/11/2022
Accepted date:
06/29/2023