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Termografia infravermelha como ferramenta de avaliação de bem-estar animal em borregas submetidas a diferentes condições de maneio
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O bem-estar animal é uma componente central dos sistemas de produção ovina, assumindo particular relevância nas operações de maneio que antecedem o transporte, devido ao seu impacto na resposta fisiológica dos animais. O presente estudo teve como objetivo avaliar o efeito da aplicação de práticas de
maneio de baixo stress durante o encaminhamento e carregamento de borregas para transporte, recorrendo à temperatura retal e à temperatura ocular obtida por termografia infravermelha como indicadores fisiológicos de stress. O estudo foi realizado numa exploração de recria e engorda de ovinos do distrito de Portalegre e envolveu 50 borregas distribuídas aleatoriamente por dois grupos:
controlo, submetido ao maneio convencional da exploração, e experimental, sujeito a práticas de maneio de baixo stress. As avaliações foram realizadas antes e após uma simulação de transporte.
Na temperatura retal observaram-se diferenças significativas em função do momento de avaliação (p = 0,036), do grupo experimental (p = 0,012) e da interação entre ambos (p = 0,013). No grupo controlo, a temperatura retal aumentou de 39,1 °C no pré-transporte para 39,5 °C no pós-transporte, enquanto no grupo experimental diminuiu ligeiramente de 39,1 °C para 39,0 °C. Relativamente à temperatura ocular, verificou-se um aumento significativo entre os momentos de avaliação (p = 0,003), com valores médios de 39,6 °C para 40,1 °C no grupo controlo e de 39,5 °C para 39,8 °C no grupo experimental. Contudo, não se observaram diferenças estatisticamente significativas entre grupos (p = 0,072), nem interação entre grupo e momento de avaliação (p = 0,647). Conclui- se que a adoção de práticas de maneio de baixo stress pode atenuar a resposta fisiológica dos ovinos durante as operações pré-transporte, evidenciando um efeito mais consistente na temperatura retal do que na temperatura ocular.
Animal welfare is a central component of sheep production systems and is particularly important in handling operations prior to transport, given its impact on the animals’ physiological response. The objective of this study was to evaluate the effect of applying low-stress handling practices during the herding and loading of ewe lambs for transport, using rectal temperature and ocular temperature obtained via infrared thermography as physiological indicators of stress. The study was conducted at a sheep rearing and fattening farm in the district of Portalegre and involved 50 ewe lambs randomly assigned to two groups: a control group, subjected to conventional farm handling, and an experimental group, subjected to low-stress handling practices. Assessments were performed before and after a transport simulation. Significant differences in rectal temperature were observed depending on the time of assessment (p = 0.036), the experimental group (p = 0.012), and the interaction between the two (p = 0.013). In the control group, rectal temperature increased from 39.1 °C before transport to 39.5 °C after transport, while in the experimental group it decreased slightly from 39.1 °C to 39.0 °C. Regarding ocular temperature, a significant increase was observed between the assessment time points (p = 0.003), with mean values ranging from 39.6 °C to 40.1 °C in the control group and from 39.5 °C to 39.8 °C in the experimental group. However, no statistically significant differences were observed between groups (p = 0.072), nor was there an interaction between group and assessment time point (p = 0.647). It is concluded that the adoption of low-stress handling practices can mitigate the physiological response of sheep during pre-transport operations, showing a more consistent effect on rectal temperature than on ocular temperature.
Animal welfare is a central component of sheep production systems and is particularly important in handling operations prior to transport, given its impact on the animals’ physiological response. The objective of this study was to evaluate the effect of applying low-stress handling practices during the herding and loading of ewe lambs for transport, using rectal temperature and ocular temperature obtained via infrared thermography as physiological indicators of stress. The study was conducted at a sheep rearing and fattening farm in the district of Portalegre and involved 50 ewe lambs randomly assigned to two groups: a control group, subjected to conventional farm handling, and an experimental group, subjected to low-stress handling practices. Assessments were performed before and after a transport simulation. Significant differences in rectal temperature were observed depending on the time of assessment (p = 0.036), the experimental group (p = 0.012), and the interaction between the two (p = 0.013). In the control group, rectal temperature increased from 39.1 °C before transport to 39.5 °C after transport, while in the experimental group it decreased slightly from 39.1 °C to 39.0 °C. Regarding ocular temperature, a significant increase was observed between the assessment time points (p = 0.003), with mean values ranging from 39.6 °C to 40.1 °C in the control group and from 39.5 °C to 39.8 °C in the experimental group. However, no statistically significant differences were observed between groups (p = 0.072), nor was there an interaction between group and assessment time point (p = 0.647). It is concluded that the adoption of low-stress handling practices can mitigate the physiological response of sheep during pre-transport operations, showing a more consistent effect on rectal temperature than on ocular temperature.
Descrição
Palavras-chave
bem-estar animal maneio de baixo stress ovinos termografia infravermelha temperatura retal transporte. animal welfare low-stress handling sheep infrared thermography rectal temperature transport.
Contexto Educativo
Citação
Catalão, M. E. S. (2026). Termografia infravermelha como ferramenta de avaliação de bem- estar animal em borregas submetidas a diferentes condições de maneio. Escola Superior de Biociências de Elvas. Dissertação de Licenciatura em Enfermagem Veterinária.