Simple physiological indicators of 1„2 Santa inês × 1„2 Dorper crossbred sheep raised in the municipality of Mirador, Maranhão, Brazil

Autores/as

DOI:

https://doi.org/10.17523/bia.2022.v79.e1510

Palabras clave:

animal welfare, animal bioclimatology, heat stress, little ruminants

Resumen

In this study we aimed to evaluate the influence of environmental differences caused by day shifts on the physiological indicators of crossbred ½ Santa Inês × ½ Dorper sheep raised in a semi-intensive system. For this, 12 animals with an average weight of 35.00 ± 5.00 kg were allocated in a completely randomized design, with two treatments (morning shift and afternoon shift) and six replicates per treatment. The environmental variables (temperature (ºC) and relative humidity (%)) were collected using a digital thermo-hygrometer. The black globe temperature and humidity index was calculated using temperature values of the black globe thermometer and dew point. The following physiological indicators were measured in the animals: respiratory rate (mov/min); heart rate (beats/min); rectal temperature (ºC); and surface temperature (ºC). In the morning shift, the average values of air temperature and relative humidity were 31.71ºC and 88.66%, respectively. In the afternoon, the average air temperature was 33.91ºC, while the relative humidity was 62.66%. The highest mean globe temperature and humidity index was observed in the afternoon shift (87.75). The physiological indicators showed the highest mean values in the afternoon shift: respiratory rate 73.72 mov/min; heart rate 81.27 beats/min; rectal temperature 39.98ºC; surface temperature 34.76ºC. The crossbred 1„2 Santa Inês × 1„2 Dorper sheep reared in a semi-intensive system showed signs of thermal discomfort.

Descargas

Los datos de descarga aún no están disponibles.

Descargas

Publicado

2022-11-21

Número

Sección

ETOLOGIA E AMBIÊNCIA

Cómo citar

Simple physiological indicators of 1„2 Santa inês × 1„2 Dorper crossbred sheep raised in the municipality of Mirador, Maranhão, Brazil. (2022). Boletín De Industria Animal, 79, 1-10. https://doi.org/10.17523/bia.2022.v79.e1510

Artículos más leídos del mismo autor/a