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Provedor de dados:  Scientia Agricola
País:  Brazil
Título:  Probability density function of the number of embryos collected from superovulated Nelore breed donors
Autores:  Beltrame,Renato Travassos
Barioni,Luis Gustavo
Quirino,Celia Raquel
Dantas,Ozanival Dario
Data:  2009-08-01
Ano:  2009
Palavras-chave:  Zebu
Resumo:  Several models have been developed to evaluate reproductive status of cows through concentration of progesterone in milk, the effect of sex selection in the commercial production of herds and bioeconomic performance of the multiple ovulation and embryo transfer system in select herds. However, models describing the production of embryos in superovulated females have yet to be developed. A probability density function of the number of embryos collected by donors of the Nelore breed was determined. Records of 61,928 embryo collections from 26,767 donors from 1991 to 2005 were analyzed. Data were provided by the Brazilian Association of Creators of Zebu and Controlmax Consultoria e Sistemas Ltda. The probability density function of the number of viable embryos was modeled using exponential and gamma distributions. Parameter fitting was carried out for maximum likelihood using a non-linear gradient method. Both distributions presented similar level of precision: root mean square error (RMSE) = 0.0072 and 0.0071 for the exponential and gamma distributions, respectively; both distributions are thus deemed suitable for representing the probability density function of embryo production by Nelore females.
Tipo:  Info:eu-repo/semantics/article
Idioma:  Inglês
Editor:  São Paulo - Escola Superior de Agricultura "Luiz de Queiroz"
Relação:  10.1590/S0103-90162009000400003
Formato:  text/html
Fonte:  Scientia Agricola v.66 n.4 2009
Direitos:  info:eu-repo/semantics/openAccess

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