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Development of mathematical models for estimating the passage rate in growing goat kids subjected to different levels nutritional

Grant number: 13/06259-6
Support type:Scholarships abroad - Research Internship - Doctorate
Effective date (Start): October 01, 2013
Effective date (End): July 31, 2014
Field of knowledge:Agronomical Sciences - Animal Husbandry
Principal Investigator:Izabelle Auxiliadora Molina de Almeida Teixeira
Grantee:Rafael Fernandes Leite
Supervisor abroad: Pekka Juhani Huhtanen
Home Institution: Faculdade de Ciências Agrárias e Veterinárias (FCAV). Universidade Estadual Paulista (UNESP). Campus de Jaboticabal. Jaboticabal , SP, Brazil
Local de pesquisa : Swedish University of Agricultural Sciences, Uppsala (SLU), Sweden  
Associated to the scholarship:10/20087-5 - Passage rate in weaned goat kids subjected to different feeding levels, BP.DR

Abstract

Advances in animal nutrition allow the identification of large gap on passage rate, which often are not yet fully understood the factors that affect it. The use of mathematical models to estimate the passage rate in ruminants has been applied to cattle and sheep, but the development of models to estimate the passage rate in goats is still incipient, particularly when it is considered that extrapolation would be wrong, because these animals show naturally lower retention time and hence greater rate of passage. Therefore, the objective of this project is to develop mathematical models to estimate the passage rate in goats in the growing phase. To achieve this goal, it will be used variables that can be measured and calculated routinely and presenting no collinearity. The database to develop prediction models of passage rate in goats is based on the students doctoral thesis (FAPESP - 2010/20087-5), which includes goats in the growing phase with a body weight ranging from 15 to 30 kg. The models will be developed using the mixed model analysis. The models will be selected based on the criteria of convergence. The sensitivity analysis will be determined using the Monte Carlo technique. The models will be evaluated with an independent database and the precison of the model will be evaluated by the coefficient of determination (R2) of the linear regression between the predicted and observed values, the concordance correlation coefficient (CCC) and the prediction mean square error (msep ) and its decomposition in mean bias, linear bias and error. (AU)

Scientific publications
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
LEITE, R. F.; KRIZSAN, S. J.; FIGUEIREDO, F. O. M.; CARVALHO, V. B.; TEIXEIRA, I. A. M. A.; HUHTANEN, P. Retention time of digesta in the gastrointestinal tract of growing Saanen goats. JOURNAL OF ANIMAL SCIENCE, v. 93, n. 8, p. 3969-3978, AUG 2015. Web of Science Citations: 2.
LEITE, R. F.; KRIZSAN, S. J.; FIGUEIREDO, F. O. M.; CARVALHO, V. B.; TEIXEIRA, I. A. M. A.; HUHTANEN, P. Contribution of different segments of the gastrointestinal tract to digestion in growing Saanen goats. JOURNAL OF ANIMAL SCIENCE, v. 93, n. 4, p. 1802-1814, APR 2015. Web of Science Citations: 8.

Please report errors in scientific publications list by writing to: cdi@fapesp.br.