Data/hora: 22/09/2024 22:44:16

Biblioteca(s): 	Embrapa Pecuária Sudeste.	
Data corrente: 	03/08/2022	
Data da última atualização: 	03/08/2022	
Autoria: 	SOUSA, M. A. P. DE; ESTEVES, S. N.; SILVA, A. G. M. E; BRANDÃO, F. Z.; DAHER, L. C. C.; PEZZOPANE, J. R. M.; VOLANTE, C. A.; BARRETO, A. DO N.; GARCIA, A. R.	
Afiliação: 	MARCO ANTONIO PAULA DE SOUSA, UFPA - Castanhal-PA; SERGIO NOVITA ESTEVES, CPPSE; ANDRÉ GUIMARÃES MACIEL E SILVA, UFPA - Castanhal-PA; FELIPE ZANDONADI BRANDÃO, UFF; LUCIARA CELI CHAVES DAHER, Federal Rural University of the Amazon; JOSE RICARDO MACEDO PEZZOPANE, CPPSE; CAIO AUGUSTO VOLANTE, FAPESP; ANDRÉA DO NASCIMENTO BARRETO, UFPA - Castanhal-PA; ALEXANDRE ROSSETTO GARCIA, CPPSE.	
Título: 	Major differences between single or twin hair lambs in the immediate postpartum period: metabolic and thermodynamic patterns detected by infrared thermography.	
Ano de publicação: 	2022	
Fonte/Imprenta: 	Journal of Thermal Biology, v. 107, jul 2022, 103258.	
Páginas: 	12 p.	
DOI: 	https://doi.org/10.1016/j.jtherbio.2022.103258	
Idioma: 	Inglês	
Conteúdo: 	The objective was to evaluate the differences between hair lambs, born from single or twin births, regarding the latency periods for standing up and suckling, the vitality, glycemic, cortisol, and triiodothyronine concentrations, as well as the phenotypic characteristics related to the maintenance of homeothermy in the immediate postpartum. Single (n = 10) or twin (n = 12) Morada Nova lambs were evaluated after birth, during the first successful suckling (M0 = Timepoint 0), and at regular intervals of 20 min (M20, M40, M60). Lambs from single births had higher birth weight (3.09 vs 2.58 kg; P &#8804; 0.05) and higher serum triiodothyronine concentration (267 vs 209 ng/dL; P &#8804; 0.05) compared to twin lambs. There was a positive correlation between weight and blood glucose (0.57; P &#8804; 0.05) for both single and twin lambs. The type of birth did not affect vitality, which was negatively associated with cortisol concentration (&#8722;0.53; P &#8804; 0.05). Twin lambs had higher internal and ocular temperatures (39.29 vs 38.67 °C and 38.84 vs 38.13 °C; P &#8804; 0.05, respectively). Body surface temperatures increased over time in both groups (P &#8804; 0.05). An increase in the temperature of the hips region (ysingle = 27.88 + 0.019*time; R2 = 0.96; P = 0.019 and ytwin = 28.74 + 0.019*time; R2 = 0.94; P = 0.029) was observed for both single and twin lambs, which coincides with the region of brown adipose tissue deposition. The lowest absolute thermal variabilities between twin and single lambs in M0 and M60 were recorded in the midloin and integral dorsal area. The parturition type did not influence the latencies to stand up (P = 0.908) and for the first suckling (P = 0.888), and the vitality score (P = 0.353). Thus, single and twin lambs do not differ in neonatal behavior, but they presented specific metabolic strategies to regulate body temperature over time. Midloin and integral dorsal areas are anatomical regions suggested for use in serial thermographic monitoring. Infrared thermography may be an important complementary resource in neonatal care.	
Palavras-Chave: 	Hair sheep; Newborn lamb; Precision livestock farming.	
Thesagro: 	Ovis Aries.	
Thesaurus Nal: 	Surface temperature; Thermoregulation.	
Categoria do assunto: 	L Ciência Animal e Produtos de Origem Animal	
Registro original: 	Embrapa Pecuária Sudeste (CPPSE)	
Exemplares: 	CPPSE - (25694-1) - UPC - AP - DD - PROCI-2022.00058 - SOU - 2022.00113 - DIS