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Multivariate modelling to estimate carcase characteristics and commercial cuts of Boer goats

Published online by Cambridge University Press:  10 May 2022

Elizabete Cristina Batista da Costa Macena
Affiliation:
Animal Science Ph.D. Student, Federal University of Paraiba, Areia, Brazil
Roberto Germano Costa
Affiliation:
Professor at Animal Science Department, Federal University of Paraiba, Areia, Brazil
Wandrick Hauss de Sousa
Affiliation:
Researcher at Paraiba State Agriculture and Livestock Research Agency S.A., EMEPA, João Pessoa, Brazil
Felipe Queiroga Cartaxo
Affiliation:
Researcher at Paraiba State Agriculture and Livestock Research Agency S.A., EMEPA, João Pessoa, Brazil
Neila Lidiany Ribeiro*
Affiliation:
Researcher at National Semiarid Institute, Campina Grande, Brazil
Janaina Kelli Gomes Arandas
Affiliation:
Postdoctoral researcher at Animal Science Department, Federal Rural University of Pernambuco, Recife, Brazil
Maria Norma Ribeiro
Affiliation:
Professor at Animal Science Department, Federal Rural University of Pernambuco, Recife, Brazil
*
Author for correspondence: Neila Lidiany Ribeiro, E-mail: neilalr@hotmail.com

Abstract

The objective was to establish a multivariate model using two complementary multivariate statistical techniques, factor analysis and multiple stepwise regression to predict carcase characteristics, carcase cuts, internal fat, viscera and loin eye area from body measurements of goats Boer mestizos. Thirty-two goats were used, with initial average weights of 3.3 ± 0.61 kg and final average weights of 16 ± 2.5 kg. Before slaughter and after 16 h of fasting, body weight was measured along with the biometric measurements (BMs) of each animal: body length, withers height, croup height, chest width, croup width, croup perimeter, thoracic perimeter, leg length and thigh circumference. The half carcases were sectioned in six anatomical regions that made up the commercial cuts: neck, palette, rib, handsaw, loin and ham. BMs showed a high correlation with a few exceptions; most of the correlations are above 50%. What also happens with the Carcass weight and cuts were also correlated above 50% with BMs. The data presented an index for the Kaiser–Meyer–Olkin test of 0.80, demonstrating the adequacy of the factor analysis. Through factor analysis, it was possible to observe that the first two factors extracted accumulated 75.47% of the total variance of the studied characteristics. Moderate to high and positive correlations of morphological characteristics with body weight, carcase characteristics and primary carcase cuts suggested the adequacy of morphological characteristics as criteria for early selection of crossbred Boer goats for their body weight and carcase characteristics without slaughter.

Type
Animal Research Paper
Copyright
Copyright © The Author(s), 2022. Published by Cambridge University Press

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