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

• Autor(a) principal: Felipe Amorim Caetano de Souza
• Data de Publicação: 2021
• Outros Autores: Glaciane Lopes Teixeira, Tales Jesus Fernandes, Fabiana Rezende Muniz, Fabiana Oliveira Cunha, Sarah Laguna Conceição Meirelles, Joel Augusto Muniz, Raquel Silva de Moura
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Institucional da UFMG
• Texto Completo: https://doi.org/10.37496/rbz5020200047; http://hdl.handle.net/1843/54890; https://orcid.org/0000-0002-1267-6038; https://orcid.org/0000-0003-1716-3888; https://orcid.org/0000-0002-1457-9653; https://orcid.org/0000-0001-7002-1032; https://orcid.org/0000-0003-2292-0943; https://orcid.org/0000-0002-3331-2495; https://orcid.org/0000-0002-1069-4136; https://orcid.org/0000-0002-9642-1779
• topic: Breed; Equine; Foal; Nutrition; Equino; Equino - Alimentação e rações; Campolina (Equino); Nutrição animal

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.