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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Eye Surface Temperature as a Potential Indicator of Physical Fitness in Ranch Horses

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Author(s):
Esteves Trindade, Pedro Henrique [1] ; Ferraz, Guilherme de Camargo [2] ; Pereira Lima, Maria Lucia [3] ; Negrao, Joao Alberto [4] ; Paranhos da Costa, Mateus J. R. [5]
Total Authors: 5
Affiliation:
[1] Univ Estadual Paulista, Fac Ciencias Agr & Vet, Programa Posgrad Zootecnia, UNESP, Jaboticabal, SP - Brazil
[2] Univ Estadual Paulista, Fac Ciencias Agr & Vet, Dept Morfol & Fisiol Anim, UNESP, Jaboticabal, SP - Brazil
[3] IZ, Sertaozinho, SP - Brazil
[4] Univ Sao Paulo, Fac Zootecnia & Engn Alimentos, Dept Ciencias Basicas, Pirassununga, SP - Brazil
[5] Univ Estadual Paulista, Fac Ciencias Agr & Vet, Dept Zootecnia, UNESP, Jaboticabal, SP - Brazil
Total Affiliations: 5
Document type: Journal article
Source: Journal of Equine Veterinary Science; v. 75, p. 1-8, APR 2019.
Web of Science Citations: 0
Abstract

This study aimed to investigate the use of maximum eye surface temperature (ESTmax), recorded by infrared thermography, as an indicator of physical fitness in ranch horses. Data collection was carried out with 16 horses by recording six physical fitness biomarkers (ESTmax, respiratory rate, creatine kinase activity {[}CK], and concentrations of total serum protein, plasmatic cortisol, and lactate) before and after a regular working day. We also recorded heart rate during the exercise, exercise duration, average velocity, distance traveled, and air temperature and humidity. The variation between the sampling times was compared by using repeated measures ANOVA or Wilcoxon paired test. The t-test was used to compare ESTmax means of dehydrated and nondehydrated horses. The differences (DIF-) between each variable's sampling times were calculated, and the Spearman's correlation coefficients between DIF-ESTmax and DIF- of other variables were estimated. A hierarchical cluster analysis was used to classify the horses according to their physical fitness. All biomarkers increased after the workday, and the ESTmax means of dehydrated and nondehydrated horses did not differ (P < .05). DIF-CK and DIF-ESTmax were positively correlated (rs = 0.56, P < .05). The cluster analysis defined two groups of horses (LOW and HIGH), with DIF-ESTmax and DIF-CK differing statistically between them. HIGH horses showed CK higher than 350 U/L, indicating some degree of muscle damage. These results suggest that ESTmax has potential to predict changes in CK and, thus could be a useful indicator of physical fitness in ranch horses; although, its effectiveness has to be confirmed in future studies. (C) 2018 Elsevier Inc. All rights reserved. (AU)

FAPESP's process: 15/14421-3 - Developing and validation for welfare indicators of horses used for beef cattle management
Grantee:Pedro Henrique Esteves Trindade
Support Opportunities: Scholarships in Brazil - Master
FAPESP's process: 16/15374-1 - Assessment of body language in the evaluation of animal welfare in ranch horses
Grantee:Pedro Henrique Esteves Trindade
Support Opportunities: Scholarships abroad - Research Internship - Master's degree