Practical procedures to body weight estimation and correction factors applied to Campolina horses

ABSTRACT The objective of this study was to evaluate the accuracy of the following six body weight (BW) estimation methods in Campolina (CAM) horses: A - weight tape placed at three different positions on the animal’s thorax; B - Crevat and Quetelet’s formula; C - Hall’s formula; D - Hintz and Griffiths’s table; E - Santos’s table; and F - Cintra’s formula. A total of 380 CAM horses were separated according to sex, age class, and gestational stage and evaluated. To determine their accuracy, weights measured on a scale and weight estimates of the six methods were compared by paired t-test, mean prediction error (MPE), and coefficient of determination (R2), using R software. The predictive capacity of method F was lower in the 6-12 months age class, so this formula is not indicated. The BW was overestimated compared with the actual weight by methods A (with weight tape placed in position 3) and B and underestimated by method C. Methods D and E accurately estimated BW of CAM horses. Correction factors are required to accurately estimate BW in this breed using methods B and C. Method A with the weight tape placed in position 2 is the most accurate for predicting BW, including pregnant female horses, and can, therefore, be considered the most suitable method for estimating BW of CAM horses.

Bibliographic Details

Main Authors:	Souza,Felipe Amorim Caetano de, Teixeira,Glaciane Lopes, Fernandes,Tales Jesus, Muniz,Fabiana Rezende, Cunha,Fabiana Oliveira, Meirelles,Sarah Laguna Conceição, Muniz,Joel Augusto, Moura,Raquel Silva de
Format:	Digital revista
Language:	English
Published:	Sociedade Brasileira de Zootecnia 2021
Online Access:	http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982021000100610
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