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<p>The objective of this study was to evaluate the reliability and agreement among three alternative methods for estimating body weight (BW) in Blanco Orejinegro (BON) Creole cattle (weigh tape, Schaeffer’s formula, Agarwal’s formula) under tropical conditions in Colombia. Body weight and biometric data were collected from 42 BON cattle representing different productive categories. Heart girth and body length were measured and used to estimate BW, which was compared against measurements obtained with a livestock scale as the reference method. The analysis included graphical assessments, Pearson correlation coefficients, concordance correlation coefficients (CCC), and nonparametric tests (Kruskal–Wallis and Dunn’s test with Bonferroni adjustment). High correlations were observed among methods (<i>r</i> ≥ 0.94); however, concordance analysis revealed poor accuracy for the formula-based estimations, particularly Schaeffer’s. The weigh tape method exhibited the highest agreement with the scale, showing the highest CCC values, lowest bias, and smallest absolute errors. Agarwal’s formula produced intermediate results, whereas Schaeffer’s formula displayed the lowest reliability. Overall, the weigh tape proved to be the most accurate and practical method for estimating BW in BON cattle. The use of Schaeffer’s and Agarwal’s formulas is not recommended for this breed under the evaluated conditions. These findings emphasize the need to develop breed-specific predictive equations to improve the accuracy of BW estimation in BON cattle populations.</p>

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Comparison of body weight prediction methods in Blanco Orejinegro Creole cattle

  • 期刊论文

  • 发表日期：

    2026年4月17日

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  • Rosa Inés Parra-Cortés,
  • Alejandro Amaya,
  • Roberto Carlos Barrientos-Medina,
  • Alfonso Juventino Chay-Canul

摘要

The objective of this study was to evaluate the reliability and agreement among three alternative methods for estimating body weight (BW) in Blanco Orejinegro (BON) Creole cattle (weigh tape, Schaeffer’s formula, Agarwal’s formula) under tropical conditions in Colombia. Body weight and biometric data were collected from 42 BON cattle representing different productive categories. Heart girth and body length were measured and used to estimate BW, which was compared against measurements obtained with a livestock scale as the reference method. The analysis included graphical assessments, Pearson correlation coefficients, concordance correlation coefficients (CCC), and nonparametric tests (Kruskal–Wallis and Dunn’s test with Bonferroni adjustment). High correlations were observed among methods (r ≥ 0.94); however, concordance analysis revealed poor accuracy for the formula-based estimations, particularly Schaeffer’s. The weigh tape method exhibited the highest agreement with the scale, showing the highest CCC values, lowest bias, and smallest absolute errors. Agarwal’s formula produced intermediate results, whereas Schaeffer’s formula displayed the lowest reliability. Overall, the weigh tape proved to be the most accurate and practical method for estimating BW in BON cattle. The use of Schaeffer’s and Agarwal’s formulas is not recommended for this breed under the evaluated conditions. These findings emphasize the need to develop breed-specific predictive equations to improve the accuracy of BW estimation in BON cattle populations.