Variables with greater discriminatory power for adaptation based on multivariate analysis

Neila Lidiany Ribeiro; Dermeval Araujo Furtado; Ricardo Sousa  Silva; Raimundo Calixto Martins  Rodrigues; Airton Gonçalves  Oliveira; Nagela Maria Henrique  Mascarenhas; Tacila Rodrigues  Arruda; Fabiana Teresinha Leal de  Morais

doi:10.4025/actascianimsci.v48i1.74586

Neila Lidiany Ribeiro Universidade Federal da Paraiba https://orcid.org/0000-0002-6410-244X
Dermeval Araujo Furtado Universidade Federal de Campina Grande
Ricardo Sousa Silva Universidade Federal de Campina Grande
Raimundo Calixto Martins Rodrigues Universidade Estadual do Maranhão
Airton Gonçalves Oliveira
Nagela Maria Henrique Mascarenhas Universidade Federal de Campina Grande
Tacila Rodrigues Arruda Universidade Federal de Campina Grande
Fabiana Teresinha Leal de Morais Universidade Federal de Campina Grande

DOI: https://doi.org/10.4025/actascianimsci.v48i1.74586

Keywords: adaptative profile; discriminant canonical; sheep natives; stepwise; tympanic temperature.

Abstract

The objective of this research is to evaluate the physiological variables altogether and determine which variables have the greatest power to explain the data variation in terms of adaptive profile, using canonical and stepwise discriminant analysis. Eighteen non-castrated male sheep of the Soinga, Morada Nova, and Santa Inês breeds were used, with an average age of 5±1.0 months and an average weight of 15 ± 2.3 Kg. The RT showed a significant correlation above 50% with the temperature of the scrotum and leg; RR showed a higher correlation with tympanic (69%) than with RT (53%) tympanic showed a correlation above 70% with the temperature of the chest, back, buttocks, testicles, and leg, and 63% with the temperature of the eye, while RT showed a correlation of less than 50% with the temperature of the chest, buttocks, back and eye, and 51% with the testicle and leg. The most discriminatory variables for native breeds at comfort temperatures and thermal stress were reat rate and tympanic temperature. Tympanic temperature proved to be an important physiological variable to aid in the study of the adaptive profile of animals.

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