| Autor: |
M. B. Moura, L. S. Borges, A. L. Moreira, M. R. Santos, T. B. M. Silva, M. A. Moreira Filho, J. V. Costa, F. C. Aquino |
| Jazyk: |
English<br />Spanish; Castilian<br />Portuguese |
| Rok vydání: |
2022 |
| Předmět: |
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| Zdroj: |
Boletim de Indústria Animal, Vol 79 (2022) |
| Druh dokumentu: |
article |
| ISSN: |
1981-4100 |
| DOI: |
10.17523/bia.2022.v79.e1510 |
| Popis: |
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. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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