Banca de DEFESA: TATIANNE LEME OLIVEIRA SANTOS GODOI

Uma banca de DEFESA de DOUTORADO foi cadastrada pelo programa.
DISCENTE : TATIANNE LEME OLIVEIRA SANTOS GODOI
DATA : 30/05/2018
HORA: 09:00
LOCAL: Salão Verde do Instituto de Veterinária
TÍTULO:

Physiological responses of foals submitted branding and weaning in agricultural practice

PALAVRAS-CHAVES:

horse, animal welfare, heart rate variability

PÁGINAS: 102
GRANDE ÁREA: Ciências Agrárias
ÁREA: Medicina Veterinária
RESUMO:

GODOI, Tatianne Leme Oliveira Santos. Physiological responses of foals submitted branding and weaning in agricultural practice. 2018. 102p. Thesis (Doctorate in Veterinary Medicine). Veterinary Institute, Federal Rural University of Rio de Janeiro, Seropédica, RJ, 2018.

 

Animal handling in farming practices has been based on knowledge passed down from generations to generations, and many of those practices do not consider the importance of animal welfare. The present study evaluated two widely used agricultural practices with great impact on horses, branding and weaning. In the first chapter, the practice of identification with permanent branding was analyzed. This identification is traditionally made with hot-iron and with specific symbols. Although controversial about animal welfare, this practice is still allowed in Brazil. However, freezing branding with liquid nitrogen has been widely reported as a method that generates less pain and consequently contributes to animal welfare. These two techniques were evaluated from autonomic parameters throughout the analysis of HRV (heart rate variability) at the time of branding, presenting a significant difference between the groups fire (n = 10) and nitrogen (n = 8) (P <0, 0001), with a significant increase in heart rate, low frequency component (LF), and LF / HF ratio and decrease in the high frequency component (HF). Serum cortisol levels increased at the time of branding in both treated groups, but the results were not significant. The behavioral evaluation was observed in the animals marked with fire, in comparison to freeze branding, a more intense leakage reaction, with presence of kicks and cramps, with a significant difference in the parameter general movement and rest (P <0.0001). In the hot-iron branding, wound development was observed at the branding site, but in the nitrogen group the skin was not injured (P <0.0001). Hot-iron branding, despite having a short duration, was able to generate higher levels of stress in comparison to freeze branding in the physiological (HRV, HR) and behavioral parameters. In the second chapter, we evaluated the weaning of equines as a process that generates physical and psychological stress. This process represents to the foal, a maternal estrangement, changes in feeding with maternal milk deprivation, alteration of environment and management, giving the foal new situations to which they must adapt. The weaning method was used in groups with presence of an adult female not related to the foals. Acupuncture has been a complementary medicine tool widely used in stress reduction. In the period prior to weaning, four acupuncture sessions were performed on alternate days, in order to reduce the stress of separation between the foal and the mother. In the experiment, the HRV and the behavior of the foals were evaluated. There were no significant differences between the groups (Control, Sham and Acupuncture), but the weaning process proved to be a potentially stressful event in the first hours of separation and, after seven days weaning the animals were already adapted to the new condition.

 

  Key words: horse, animal welfare, heart rate variability.

MEMBROS DA BANCA:
Externo ao Programa - 2006252 - ANNA PAULA BALESDENT BARREIRA DE SA PACHECO
Externo à Instituição - CHIARA ALBANO DE ARAÚJO OLIVEIRA - UFBA
Externo à Instituição - DANIEL PENTEADO MARTINS DIAS - OUTRO
Externo ao Programa - 1189642 - FERNANDA NASCIMENTO DE GODOI
Presidente - 2193086 - MAGDA ALVES DE MEDEIROS