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Tytuł pozycji:

Thermal comfort index and infrared temperatures for lambs subjected to different environmental conditions

Tytuł:
Thermal comfort index and infrared temperatures for lambs subjected to different environmental conditions
Autorzy:
Tiago do Prado Paim
Rafhael Felipe Saraiva Martins
Cyntia Cardoso
Bruno Dallago
Helder Louvandini
Concepta McManus
Temat:
Brazilian savanna
bioclimatology
thermal stress
wind protection
artificial warming
Agriculture (General)
S1-972
Źródło:
Scientia Agricola, Vol 71, Iss 5, Pp 356-361 (2014)
Wydawca:
Universidade de São Paulo, 2014.
Rok publikacji:
2014
Kolekcja:
LCC:Agriculture (General)
Typ dokumentu:
article
Opis pliku:
electronic resource
Język:
English
Spanish; Castilian
Portuguese
ISSN:
1678-992X
0103-9016
Relacje:
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162014000500002&lng=en&tlng=en; https://doaj.org/toc/1678-992X
DOI:
10.1590/0103-9016-2013-0191
Dostęp URL:
https://doaj.org/article/1561b86262e74fb1886bc11cb6d44379  Link otwiera się w nowym oknie
Numer akcesji:
edsdoj.1561b86262e74fb1886bc11cb6d44379
Czasopismo naukowe
There is an abundance of thermal indices with different input parameters and applicabilities. Infrared thermography is a promising technique for evaluating the response of animals to the environment and differentiating between genetic groups. Thus, the aim of this study was to evaluate superficial body temperatures of lambs from three genetic groups under different environmental conditions, correlating these with thermal comfort indices. Forty lambs (18 males and 22 females) from three genetic groups (Santa Inês, Ile de France × Santa Inês and Dorper × Santa Inês) were exposed to three climatic conditions: open air, housed and artificial heating. Infrared thermal images were taken weekly at 6h, 12h and 21h at the neck, front flank, rear flank, rump, nose, skull, trunk and eye. Four thermal comfort indices were calculated using environmental measurements including black globe temperature, air humidity and wind speed. Artificial warming, provided by infrared lamps and wind protection, conserved and increased the superficial body temperature of the lambs, thus providing lower daily thermal ranges. Artificial warming did not influence daily weight gain or mortality. Skin temperatures increased along with increases in climatic indices. Again, infrared thermography is a promising technique for evaluating thermal stress conditions and differentiating environments. However, the use of thermal imaging for understanding animal responses to environmental conditions requires further study.

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