Show simple item record

ANALYSIS OF THE LACTATION CURVE OF MURRAH BUFFALOES WITH MIXED NON-LINEAR MODELS

dc.creatorLuna-Palomera, Carlos
dc.creatorDomínguez-Viveros, Joel
dc.creatorAguilar-Palma, Guadalupe Nelson
dc.creatorCastillo-Rangel, Francisco
dc.creatorSánchez-Dávila, Fernando
dc.creatorMacías-Cruz, Ulises
dc.date2021-12-17
dc.date.accessioned2022-11-21T13:44:36Z
dc.date.available2022-11-21T13:44:36Z
dc.identifierhttps://revistas.udec.cl/index.php/chjaas/article/view/6427
dc.identifier10.29393/CHJAAS37-22ALCU60022
dc.identifier.urihttps://revistaschilenas.uchile.cl/handle/2250/215859
dc.descriptionThis study aimed to evaluate the lactation curve of female Murrah buffaloes, using mixed non-linear models (NLM), across three lactation periods (180 d, 210 d, and 240 d). A total of 5334 data on daily milk production (kg) were analyzed. The data were collected every seven days in the interval of one to 250 days of lactation, corresponding to 221 lactations and 145 females, with calvings from 2017 to 2019. The data came from a herd located in the Centro municipality, Tabasco, Mexico. Five NLM were evaluated: Wood (WOD), Wiltmink (WIL), Cobby (COB), Brody (BRO), Sikka (SIK). The best fit model was selected based on the mean prediction error, mean absolute percentage error (MAPE), prediction error variance, coefficient of determination (R2), concordance correlation coefficient (CCC), Akaike (AIC) and Bayesian (BIC) information criteria. A regression analysis was performed between the observed and predicted values. All the NLM had a R2 above 0.91. They tend to underestimate the predictions, without residual autocorrelation. The MAPE showed an average value of 23.5%. The best fit model was WOD, followed by SIK and BRO. For WIL and COB, the mixed model did not improve the fitting. The shortest lactation period showed the best fit, followed by the 210 d and 240 d periods. The relationship between observed:predicted values fluctuated from 0.65 to 1.00, with an average value of 0.94. The use of NLM transcended in the AIC and BIC. The evaluated models showed goodness of fit, with good predictability, but low values in accuracy and precision of prediction.en-US
dc.descriptionThis study aimed to evaluate the lactation curve of female Murrah buffaloes, using mixed nonlinearmodels (NLM), across three lactation periods (180 d, 210 d, and 240 d). A total of 5334 data ondaily milk production (kg) were analyzed. The data were collected every seven days in the interval ofone to 250 days of lactation, corresponding to 221 lactations and 145 females, with calvings from 2017to 2019. The data came from a herd located in the Centro municipality, Tabasco, Mexico. Five NLMwere evaluated: Wood (WOD), Wiltmink (WIL), Cobby (COB), Brody (BRO), Sikka (SIK). The bestfit model was selected based on the mean prediction error, mean absolute percentage error (MAPE),prediction error variance, coefficient of determination (R2), concordance correlation coefficient (CCC),Akaike (AIC) and Bayesian (BIC) information criteria. A regression analysis was performed betweenthe observed and predicted values. All the NLM had a R2 above 0.91. They tend to underestimatethe predictions, without residual autocorrelation. The MAPE showed an average value of 23.5%.The best fit model was WOD, followed by SIK and BRO. For WIL and COB, the mixed model didnot improve the fitting. The shortest lactation period showed the best fit, followed by the 210 dand 240 d periods. The relationship between observed:predicted values fluctuated from 0.65 to 1.00,with an average value of 0.94. The use of NLM transcended in the AIC and BIC. The evaluatedmodels showed goodness of fit, with good predictability, but low values in accuracy and precisionof prediction.es-ES
dc.formatapplication/pdf
dc.languagespa
dc.publisherFacultad de Agronomía, Facultad de Ingeniería Agrícola y Facultad de Ciencias Veterinarias - Universidad de Concepciónes-ES
dc.relationhttps://revistas.udec.cl/index.php/chjaas/article/view/6427/6315
dc.rightshttps://creativecommons.org/licenses/by/4.0es-ES
dc.sourceChilean Journal of Agricultural & Animal Sciences (ex Agro-Ciencia); Vol. 37 No. 3 (2021); 200-208en-US
dc.sourceChilean Journal of Agricultural & Animal Sciences; Vol. 37 Núm. 3 (2021); 200-208es-ES
dc.source0719-3890
dc.subjectBubalinocultureen-US
dc.subjectlactation perioden-US
dc.subjectmilk productionen-US
dc.subjectmodel selectionen-US
dc.subjecttropical cattleen-US
dc.titleANALYSIS OF THE LACTATION CURVE OF MURRAH BUFFALOES WITH MIXED NON-LINEAR MODELSen-US
dc.titleANALYSIS OF THE LACTATION CURVE OF MURRAH BUFFALOES WITH MIXED NON-LINEAR MODELSes-ES
dc.typeinfo:eu-repo/semantics/article
dc.typeinfo:eu-repo/semantics/publishedVersion


This item appears in the following Collection(s)

Show simple item record