NDLI: Thermographic evaluation of climatic conditions on lambs from different genetic groups

Content Provider	Springer Nature Link
Author	do Prado Paim, Tiago Borges, Bárbara Oliveira de Mello Tavares Lima, Paulo Gomes, Edgard Franco Dallago, Bru Stéfa Lima Fadel, Rossala Menezes, Adriana Morato Louvandini, Helder Cazzi, Maria Eugênia Andrighetto Barcellos, Júlio Otavio Jardim McManus, Concepta
Copyright Year	2012
Abstract	In production systems the characterization of genetic resources in relation to their capacity to respond to environmental conditions is necessary. The objective of this study was to evaluate the use of infrared thermography for separation of animals from different genetic groups and determine which phenotypic traits are important for climatic adaptation. A total of 126 suckling lambs from four different genetic groups (Santa Inês – SI, Bergamasca – B, Bergamasca X Santa Inês – BS, and Ile de France X Santa Inês – IL) were used. The animals were divided into two groups, one housed and another in an outside paddock. Thermograph photographs were taken at four-hour intervals over three full days. Temperatures of the nose, skull, neck, fore and rear flanks and rump were measured, as well as coat depth, the density and length of hairs, reflectance and color. The daily temperature range during the experimental period was more than 20°C, with animals experiencing heat (12 h to 15 h) and cold (24 h to 4 h) stress. The three main phenotypic traits that influenced genetic group separation were hair density, height of coat, and length of hairs. Thermograph temperatures were able to detect different responses of the genetic groups to the environment. Therefore, infrared thermography is a promising technique to evaluate the response of animals to the environment and to differentiate between genetic groups.
Starting Page	59
Ending Page	66
Page Count	8
File Format	PDF
ISSN	00207128
Journal	International Journal of Biometeorology
Volume Number	57
Issue Number	1
e-ISSN	14321254
Language	English
Publisher	Springer-Verlag
Publisher Date	2012-03-13
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Bioclimatology Coat traits Housing Infrared Thermal stress Tropical conditions Environment Biophysics and Biological Physics Meteorology/Climatology Animal Physiology Plant Physiology Environmental Health
Content Type	Text
Resource Type	Article
Subject	Ecology Health, Toxicology and Mutagenesis Atmospheric Science

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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