Use of heat tolerance traits in discriminating between groups of sheep in central Brazil.

Tropical Animal Health and Production
Marlos CastanheiraConcepta McManus

Abstract

The animal and its environment make up an integrated system, where each acts on the other. Tropical regions are characterized by high levels of solar radiation and environmental temperature which may adversely affect animal production. This study carries out a multivariate analysis of physical and physiological traits in sheep in the Federal District of Brazil to test the ability to separate groups of animals and determine which traits are most important in the adaptation of animal to heat stress. The variables studied included coat thickness, number and length of hairs, pigmentation of the skin and coat, number of sweat glands as well as heart and respiratory rates, rectal and skin temperatures, sweating rate, and blood parameters. Five groups of ten animals were used depending on breed (Bergamasca, crossbred, or Santa Inês) or coat color (Santa Inês--brown, white, and black). The data underwent multivariate statistical analyses including cluster, discriminate, and canonical, using Statistical Analysis System--SAS®. The tree diagram showed clear distances between groups studied and canonical analysis was able to separate individuals in groups, especially Bergamasca and white Santa Inês. The canonical correlation redundancy ana...Continue Reading

References

Dec 5, 2008·Tropical Animal Health and Production·Concepta McManusSamuel Rezende Paiva
Aug 4, 2010·Tropical Animal Health and Production·Concepta McManusTiago Prado Paim

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Citations

Mar 5, 2013·Tropical Animal Health and Production·Marilma Pachêco Chediak CorreaConcepta McManus
May 17, 2013·Tropical Animal Health and Production·Rosita Denny RomeroJoel Hernández Cerón
Mar 14, 2012·International Journal of Biometeorology·Tiago do Prado PaimConcepta McManus
Jul 21, 2015·Sensors·Concepta McManusVanessa Calderaro Dalcin
May 13, 2017·International Journal of Biometeorology·Priscila Reis KahwageAlexandre Rossetto Garcia
Sep 13, 2020·International Journal of Biometeorology·Jacinara Hody Gurgel Morais LeiteDébora Andrea Evangelista Façanha
Sep 22, 2020·Journal of Applied Animal Welfare Science : JAAWS·Maria Samires Martins CastroRobson Mateus Freitas Silveira
Jan 16, 2021·Tropical Animal Health and Production·Concepta Margaret McManusSamuel Rezende Paiva
Jul 18, 2020·Theriogenology·Concepta M McManusSamuel R Paiva

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