Estimated live weight of growing Pêga breed donkeys

• Main Authors: Camilla Garcia Moreira, Júlio César de Carvalho Balieiro, Madalena Lima Menezes, Gabriela Ribeiro, Olivia Carmen de Araújo Nascimento, Roberta Ariboni Brandi
• Format: Article
• Language: English
• Published: Universidade Federal de Santa Maria 2017-09-01
• Series: Ciência Rural
• Subjects: accuracy; asinine; equations; estimation; growth
• Online Access: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782017001000651&lng=en&tlng=en

ABSTRACT: The equations available in the literature to estimate the body weight (BW) of Pêga breed donkeys were evaluated using 25 animals aged 0-6 months and it was proposed an equation for BW prediction. For the measurement of the thoracic perimeter (TP) and for weighing the animals using the weighing tape, the animals were positioned in a forced station on a steep slope. An electronic scale was used for the determination of the BW. Accuracy of linear and nonlinear equations described in the literature was tested for BW prediction based on the animals’ TP, followed by the comparison of these equations with the equation developed in the present study for BW prediction of Pêga breed donkeys. A difference was noted (P<0.001) between the weights obtained on the electronic scale and the weighing tape. Linear and nonlinear equations available in the literature did not present favorable results with the data of the present study. The equation developed for the estimation of donkeys’ BW allowed the development of a weighing tape exclusive for young animals. Further evaluations are required for other Pêga donkey populations to confirm the efficacy of the proposed equation.