Data/hora: 25/05/2024 19:15:25

Biblioteca(s): 	Embrapa Gado de Leite.	
Tipo da produção científica: 	Artigo em Periódico Indexado	
Circulação/Nível: 	A - 1	
Data corrente: 	17/07/2023	
Data da última atualização: 	22/08/2023	
Autoria: 	GUADAGNIN, A. R.; MATIELLO, J. P.; RIBEIRO, R. S.; PEREIRA, L. G. R.; MACHADO, F. S.; TOMICH, T. R.; CAMPOS, M. M.; HEISLER, G.; FISCHER, V.	
Afiliação: 	ANNE R. GUADAGNIN, Universidade Federal do Rio Grande do Sul; JOAO P. MATIELLO, Universidade Federal do Rio Grande do Sul; RAFAEL S. RIBEIRO, Universidade Federal de São João del-Rei; LUIZ GUSTAVO RIBEIRO PEREIRA, CNPGL; FERNANDA SAMARINI MACHADO, CNPGL; THIERRY RIBEIRO TOMICH, CNPGL; MARIANA MAGALHAES CAMPOS, CNPGL; GUILHERME HEISLER, Universidade Federal do Rio Grande do Sul; VIVIAN FISCHER, Universidade Federal do Rio Grande do Sul.	
Título: 	Assessment of heat production and methane emission using infrared thermography in lactating Holstein and Gyrolando-F1 (½ Holstein ½ Gyr) crossbreed cows.	
Ano de publicação: 	2023	
Fonte/Imprenta: 	Journal of Thermal Biology, v. 115, 103628, 2023.	
DOI: 	https://doi.org/10.1016/j.jtherbio.2023.103628	
Idioma: 	Inglês	
Conteúdo: 	Infrared thermography (IRT) is a non-invasive and efficient tool to detect changes in the animal?s body surface temperature, which is directly associated with the animal?s energy loss. Methane emission represents a significant energy loss, particularly in ruminants, as well as heat production. Therefore, the aim of this study was to correlate skin temperature measured using IRT with heat production (HP) and methane emission in lactating Holstein and crossbred ½ Holstein x ½ Gyr (Gyrolando-F1) cows. Six Gyrolando-F1 and four Holstein cows, all primiparous, at mid lactation were used to evaluate daily HP and methane emission using indirect calorimetry in respiratory chambers. Thermographic images were taken at anus, vulva, ribs (on the right side), left flank, right flank, right front foot, upper lip, masseter and eye; IRT was performed every hour during 8 h after the morning feeding. Cows received the same diet ad libitum. Daily methane emission was positively correlated with IRT taken at the right front foot 1 h after feeding in Gyrolando-F1 cows (r = 0.85, P < 0.05) and with IRT taken at the eye 5 h after feeding in Holstein cows (r = 0.88, P < 0.05). HP was positively correlated with IRT taken at the eye 6 h after feeding in Gyrolando-F1 cows (r = 0.85, P < 0.05) and with IRT taken at the eye 5 h after feeding in Holstein cows (r = 0.90, P < 0.05). Infrared thermography was positively correlated with HP and methane emission in both Holstein and Gyrolando-F1 lactating cows, although the anatomical points and times of image acquisition yielding the greatest correlation coefficients varies among breeds.	
Palavras-Chave: 	Bioenergética; Bioenergetics; Precision technology.	
Thesagro: 	Gado Gir; Gado Holandês; Gado Leiteiro; Lactação; Metano; Vaca.	
Thesaurus Nal: 	Dairy cows; Greenhouse gases.	
Categoria do assunto: 	--	
Registro original: 	Embrapa Gado de Leite (CNPGL)	
Exemplares: 	CNPGL - (26051-1) - UPC - AP - DD -  -  -  - DIS