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Analysis of culling probability in dairy buffalo using survival models

Published online by Cambridge University Press:  09 March 2010

P. M. Galeazzi ,
M. E. Z. Mercadante ,
J. A. II V. Silva ,
L. G. de Albuquerque ,
G. M. F. de Camargo  and
H. Tonhati
P. M. Galeazzi
Affiliation:
Animal Science Department, São Paulo State University, Jaboticabal, São Paulo, Brazil
M. E. Z. Mercadante
Affiliation:
Animal Science Experimental Station of Sertãozinho, São Paulo, Brazil
J. A. II V. Silva
Affiliation:
Alta Genetics Brasil, Uberaba-MG, Brazil
L. G. de Albuquerque
Affiliation:
Animal Science Department, São Paulo State University, Jaboticabal, São Paulo, Brazil
G. M. F. de Camargo
Affiliation:
Animal Science Department, São Paulo State University, Jaboticabal, São Paulo, Brazil
H. Tonhati*
Affiliation:
Animal Science Department, São Paulo State University, Jaboticabal, São Paulo, Brazil
*
†E-mail: [email protected]
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Abstract

In order to contribute to the genetic breeding programs of buffaloes, this study aimed to determine the influence of environmental effects on the stayability (ST) of dairy female Murrah buffalo in the herd. Data from 1016 buffaloes were used. ST was defined as the ability of the female to remain in the herd for 1, 2, 3, 4, 5 or 6 years after the first calving. Environmental effects were studied by survival analysis, adjusted to the fixed effects of farm, year and season of birth, class of first-lactation milk yield and age at first calving. The data were analyzed using the LIFEREG procedure of the SAS program that fits parametric models to failure time data (culling or ST = 0), and estimates parameters by maximum likelihood estimation. Breeding farm, year of birth and first-lactation milk yield significantly influenced (P < 0.0001) the ST to the specific ages (1 to 6 years after the first calving). Buffaloes that were older at first calving presented higher probabilities of being culled 1 year after the first calving, without any effect on culling at older ages. Buffaloes with a higher milk yield at first calving presented a lower culling probability and remained for a longer period of time in the herd. The effects of breeding farm, year of birth and first-lactation milk yield should be included in models used for the analysis of ST in buffaloes.

Keywords

age at first calvingBubalus bubalisfirst-lactation milk yieldfixed effects
Type
Full Paper
Information
animal , Volume 4 , Issue 8 , August 2010 , pp. 1325 - 1329
Copyright
Copyright © The Animal Consortium 2010

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References

Alencar, MM 2002. Critérios de seleção em bovinos de corte no Brasil. Simpósio Nacional de Melhoramento Animal, Campo Grande, Brazil, 3pp.Google Scholar
Cassiano, LAP, Mariante, AS, McManus, C, Marques, JRF, Costa, NA 2004. Parâmetros genéticos das características produtivas e reprodutivas de búfalos na Amazônia brasileira. Pesquisa Agropecuária Brasileira 39, 451–457.CrossRefGoogle Scholar
Madalena, FE 1983. Seleção e melhoramento genético a nível de fazenda. Simpósio de Pecuária Leiteira, Campinas, Brazil, 37pp.Google Scholar
Peeva, T, Ilieva, Y 2007. Longevity of buffalo cows and reasons for their culling. Italian Journal of Animal Science 6, 378–380.CrossRefGoogle Scholar
Phocas, F, Ducrocq, V 2006. Discrete vs continuous time survival analysis of productive life of charolais cows. World Congress on Genetics Applied to Livestock Production, Belo Horizonte, Brazil, 3pp.Google Scholar
Püski, J, Dohy, J, Szucs, E, Bozó, S, Tuan, TA, Völgyu-Csík, J 2002. Relationship of efficiency of lifetime performance to lifetime milk yield and longevity in Holstein-Friesians cows of different body types. World Congress on Genetics Applied to Livestock Production, Montpellier, France, 3pp.Google Scholar
Queiroz, AS, Figueiredo, G, Silva, JAV, Espasandin, AC, Meirelles, SL, Oliveira, JA 2007. Estimativas de parâmetros genéticos da habilidade de permanência aos 48, 60 e 72 meses de idade em vacas da raça Caracu. Revista Brasileira de Zootecnia 36, 1316–1323.CrossRefGoogle Scholar
Rosati, A, Van Vleck, LD 2002. Estimation of genetic parameters for milk, fat, protein and mozzarella cheese production for the Italian river buffalo Bubalus bubalis population. Livestock Production Science 74, 185–190.CrossRefGoogle Scholar
Sampaio Neto, JC, Martins Filho, R, Lôbo, RNB, Tonhati, H 2001. Avaliação dos desempenhos produtivos e reprodutivos de um rebanho bubalino no estado do Ceará. Revista Brasileira de Zootecnia 30, 368–373.CrossRefGoogle Scholar
Silva, JA II V, Eler, JP, Ferraz, JBS, Oliveira, HN 2003. Análise genética da habilidade de permanência em fêmeas da raça Nelore. Revista Brasileira de Zootecnia 32, 598–604.CrossRefGoogle Scholar
Teixeira, NM, Ferreira, WJ, Torres, RA, Barra, RB 2003. Parâmetros genéticos para características de longevidade de vacas da raça Holandesa no Estado de Minas Gerais. Reunião Anual da Sociedade Brasileira de Zootecnia, Santa Maria, Brazil, 3pp.CrossRefGoogle Scholar
Tonhati, H, Cerón-Muñoz, MF, Oliveira, JA, Duarte, JMC, Furtado, TP, Tseimazides, SP 2000. Parâmetros genéticos para a produção de leite, gordura e proteína em bubalinos. Revista Brasileira de Zootecnia 29, 2051–2056.Google Scholar
Van Raden, PM, Klaaskate, EJH 1993. Genetic evaluation of length of productive life including predicted longevity of live cows. Journal of Animal Science 76, 2758–2764.Google ScholarPubMed
Vollema, AR 1998. Selection for longevity in dairy cattle. PhD, Animal Breeding and Genetics Group, Wageningen Agricultural University.Google Scholar
Vollema, AR, Groen, AFA 1998. Comparison of breeding value predictors for longevity using a linear model and survival analysis. Journal of Animal Science 81, 3315–3320.Google ScholarPubMed