Evaluation of mathematical models to describe lamb growth during the pre-weaning phase
DOI:
https://doi.org/10.5433/1679-0359.2021v42n3Supl1p2073Palabras clave:
Growth curve, Hoggets, Modeling.Resumen
The aim of this study was to evaluate the use of different mathematical models to describe the growth of lambs during the pre-weaning phase and the effect of sex on their growth curve. Data from 51 lambs (26 males and 25 females) with a genetic constitution of at least 50% Santa Inês breed were used. Lamb weight was monitored during the entire pre-weaning phase (91 days) by weighing the animals weekly on a scale suitable for sheep, to draw the body-weight growth curve. The adequacy of the models was evaluated by the coefficient of determination, simultaneous F-test for parameter identity, concordance correlation coefficient, root mean square error of prediction and decomposition of the mean square error of prediction. Pairwise mean square error of prediction analysis and delta Akaike information criterion were used to compare the models in terms of accuracy and precision. The evaluation of the adequacy of the tested models showed that the data predicted by the linear, quadratic and exponential models were similar (P > 0.05) to the observed data. In contrast, the monomolecular model generated predictions that could not be accepted as true. The linear and quadratic models showed better accuracy and precision. The first-degree linear model should be preferred over the other studied models to describe growth of sheep in the pre-weaning phase. Males and females exhibited distinct growth patterns.Métricas
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Hermuche, P. M., Maranhão, R. L. A., Guimarães, R. F., Carvalho, O. A., Jr., Gomes, R. A. T., Paiva, S. R., & McManus, C. (2013). Dynamics of sheep production in Brazil. International Journal of Geo-Information, 2(1), 665-679. doi: 10.3390/ijgi2030665
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Reddy, R. C., Amodei, R., Estill, C. T., Stormshak, F., Meaker, M., & Roselli, C. E. (2015). Effect of testosterone on neuronal morphology and neuritic growth of fetal lamb hypothalamus-preoptic area and cerebral cortex in primary culture. Plos One, 10(6), e0129521. doi: 10.1371/journal.pone.0129521
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Sarmento, J. L. R., Regazzi, A. R., Sousa, W. H., Torres, R. A., Breda, F. C., & Menezes, G. R. O. (2006). Analysis of the growth curve of Santa Ines sheep. Revista Brasileira de Zootecnia, 35(2), 435-442. doi: 10.1590/S1516-35982006000200014
Souza, D. A., Selaive-Villarroel, A. B., Osório, C. S., & Teixeira, A. (2013). Growth performance, feed efficiency and carcass characteristic of lambs produced from Dorper sheep crossed with Santa Inês or Brazilian Somalis sheep. Small Ruminant Research, 114(1), 51-55. doi: 10.1016/j.smallrumres.2013.06. 006
Souza, J. S., Difante, G. S., Emerenciano, J. V., Neto, Lana, A. M. Q., Roberto, F. F. S., & Ribeiro, P. H. C. (2019). Biometric measurements of Santa Inês meat sheep reared on Brachiaria brizantha pastures in Northeast Brazil. Plos One, 14(7), e0219343. doi: 10.1371/journal.pone.0219343
Tedeschi, L. O. (2006). Assessment of the adequacy of mathematical models. Agricultural Systems, 89(2-3), 225-247. doi: 10.1016/j.agsy.2005.11.004
Urbano, S. A., Ferreira, M. A., Rangel, A. H. N., Lima, D. M., Jr., Andrade, R. P. X., & Novaes, L. P. (2017). Lamb feeding strategies during the pre-weaning period in intensive meat production systems. Tropical and Subtropical Agroecosystems, 20(1), 49-63.
Vieira, P. A. S., Pereira, L. G. R., Azevêdo, J. A. G., Neves, A. L. A., Chizzotti, M. L., Santos, R. D.,… Chaves, A. V. (2013). Development of mathematical models to predict dry matter intake in feedlot Santa Ines rams. Small Ruminant Research, 122(1-3), 78-84. doi: 10.1016/j.smallrumres.2012.10.007
Fernandes, H. J., Tedeschi, L. O., Paulino, M. F., Detmann, E., Paiva, L. S., Valadares, S. C., Fº.,... Azevêdo, J. A. G. (2012). Evaluation of mathematical models to describe growth of grazing young bulls. Revista Brasileira de Zootecnia, 41(2), 367-373. doi: 10.1590/S1516-35982012000200020
Gurgel, A. L. C., Difante, G. S., Emerenciano, J. V., Neto, Roberto, F. F. S., Zaros, L. G., Costa, M. G.,... Ítavo, C. C. B. F. (2020). Impact of supplementation with different protein sources on the parasitological profile of ovine matrices and development of lambs. Bioscience Journal, 36(2), 496-506, 2020. doi: 10. 14393/BJ-v36n2a2020-39823
Hermuche, P. M., Maranhão, R. L. A., Guimarães, R. F., Carvalho, O. A., Jr., Gomes, R. A. T., Paiva, S. R., & McManus, C. (2013). Dynamics of sheep production in Brazil. International Journal of Geo-Information, 2(1), 665-679. doi: 10.3390/ijgi2030665
Kopuzlu, S., Sezgin, E., Esenbuga, N., & Bilgin, O. C. (2014). Estimation of growth curve characteristics of Hemsin male and female sheep. Journal of Applied Animal Research, 42(2), 228-232. doi: 10.1080/097 12119.2013.84247
Oliveira, A. P., Pereira, E. S., Pinto, A. P., Silva, A. M. A., Carneiro, M. S. S., Mizubuti, I. Y.,... Gadelha, C. R. F. (2014). Estimates of nutritional requirements and use of small ruminant nutrition system model for hair sheep in semiarid conditions. Semina: Ciências Agrárias, 35(4), 1985-1998. doi: 10.5433/1679-0359. 2014v35n4p1985
Pires, C. C., Müller, L., Tonetto, C. J., & Carvalho, S. (2011). Effect of birth type and sex on performance and carcass characteristics of Ile de France x Texel crossbred lambs. Revista Ceres, 58(4), 432-437. doi: 10.1590/S0034-737X2011000400005
Reddy, R. C., Amodei, R., Estill, C. T., Stormshak, F., Meaker, M., & Roselli, C. E. (2015). Effect of testosterone on neuronal morphology and neuritic growth of fetal lamb hypothalamus-preoptic area and cerebral cortex in primary culture. Plos One, 10(6), e0129521. doi: 10.1371/journal.pone.0129521
Regazzi, A. J. (2003). Teste para verificar a igualdade de parâmetros e a identidade de modelos de regressão não-linear. Revista Ceres, 50(287), 9-26.
Ribeiro, E. L. A., & García, E. G. (2016). Indigenous sheep breeds in Brazil: potential role for contributing to the sustainability of production systems. Tropical Animal Health and Production, 48(1), 1305-1313. doi: 10.1007/s11250-016-1109-3
Sarmento, J. L. R., Regazzi, A. R., Sousa, W. H., Torres, R. A., Breda, F. C., & Menezes, G. R. O. (2006). Analysis of the growth curve of Santa Ines sheep. Revista Brasileira de Zootecnia, 35(2), 435-442. doi: 10.1590/S1516-35982006000200014
Souza, D. A., Selaive-Villarroel, A. B., Osório, C. S., & Teixeira, A. (2013). Growth performance, feed efficiency and carcass characteristic of lambs produced from Dorper sheep crossed with Santa Inês or Brazilian Somalis sheep. Small Ruminant Research, 114(1), 51-55. doi: 10.1016/j.smallrumres.2013.06. 006
Souza, J. S., Difante, G. S., Emerenciano, J. V., Neto, Lana, A. M. Q., Roberto, F. F. S., & Ribeiro, P. H. C. (2019). Biometric measurements of Santa Inês meat sheep reared on Brachiaria brizantha pastures in Northeast Brazil. Plos One, 14(7), e0219343. doi: 10.1371/journal.pone.0219343
Tedeschi, L. O. (2006). Assessment of the adequacy of mathematical models. Agricultural Systems, 89(2-3), 225-247. doi: 10.1016/j.agsy.2005.11.004
Urbano, S. A., Ferreira, M. A., Rangel, A. H. N., Lima, D. M., Jr., Andrade, R. P. X., & Novaes, L. P. (2017). Lamb feeding strategies during the pre-weaning period in intensive meat production systems. Tropical and Subtropical Agroecosystems, 20(1), 49-63.
Vieira, P. A. S., Pereira, L. G. R., Azevêdo, J. A. G., Neves, A. L. A., Chizzotti, M. L., Santos, R. D.,… Chaves, A. V. (2013). Development of mathematical models to predict dry matter intake in feedlot Santa Ines rams. Small Ruminant Research, 122(1-3), 78-84. doi: 10.1016/j.smallrumres.2012.10.007
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2021-04-22
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Gurgel, A. L. C., Difante, G. dos S., Emerenciano Neto, J. V., Fernandes, H. J., Ítavo, L. C. V., Ítavo, C. C. B. F., Fernandes, P. B., Brixner, B. M., Bezerra, J. I. G., & Ribeiro, P. H. C. (2021). Evaluation of mathematical models to describe lamb growth during the pre-weaning phase. Semina: Ciências Agrárias, 42(3Supl1), 2073–2080. https://doi.org/10.5433/1679-0359.2021v42n3Supl1p2073
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