Data/hora: 23/09/2024 12:19:53

Biblioteca(s): 	Embrapa Caprinos e Ovinos.	
Data corrente: 	20/10/2023	
Data da última atualização: 	24/10/2023	
Autoria: 	VASCONCELOS, A. M. de; BONFIM, J. M.; SOUZA, V. de; MARTINS, T. P.; POMPEU, R. C. F. F.; FAÇANHA, D. A. E.; FERREIRA, J.	
Afiliação: 	ÂNGELA MARIA DE VASCONCELOS, State University of Valley Acaraú; JOICE MELO BONFIM, State University of Valley Acaraú; VIVIANE DE SOUZA, CNPC; THAYS PAULINA MARTINS, State University of Valley Acaraú; ROBERTO CLAUDIO FERNANDES F POMPEU, CNPC; DÉBORA ANDRÉA EVANGELISTA FAÇANHA, Rural Development Institute, University of the International Integration of Afro-Brazilian Lusophony; JOSIEL FERREIRA, Instituto de Zootecnia.	
Título: 	Productive, thermoregulatory, and hormonal responses of dairy goats supplemented with selenium-enriched yeast in the Brazilian semi-arid region.	
Ano de publicação: 	2023	
Fonte/Imprenta: 	Tropical Animal Health and Production, v. 55, n. 6, article 365, Oct. 2023.	
DOI: 	https://doi.org/10.1007/s11250-023-03777-z	
Idioma: 	Inglês	
Conteúdo: 	Abstract: The aim of this study was to evaluate the effect of adding selenium-enriched yeast (SE) in the diet of dairy goats during 60 days of lactation and its effect on productive, thermoregulatory, and hormonal responses of animals managed in a semi-arid region. Sixteen Saanen × Toggenburg crossbred goats were used in a completely randomized design. Goats were weighed, and their milk yield was monitored weekly. Before the animals entered the treatments and at every 20-day milk producing, blood samples were collected to determine the SE levels. At 20, 40, and days of the lactation cycle, individual milk samples were collected to determine composition, casein, urea nitrogen, and selenium content. Measurements of respiratory rate (RR), rectal temperature (RT), coat surface temperature (CST), and epidermal temperature (ET) were performed weekly during the experimental period in two shifts, one in the morning (9 am) and the other in the afternoon (3 pm). No difference (P > 0.05) was detected for body weight, milk yield, composition, selenium concentration, and urea nitrogen. Lower RR and ET (P < 0.05) were observed for animals that received SE supplementation. Thyroid hormone concentrations were similar between treatments (P > 0.05). The positive results of the SE supplementation were concentrated in thermoregulatory responses, and there was no effect on productive, hormonal responses, and plasmatic concentration of selenium in the milk. The SE supplementation for dairy goats managed in a Brazilian semi-arid region was able to promote reduction of RR and coat temperatures.	
Palavras-Chave: 	Brasil; Micromineral; Milk performance; Organic selenium; Rectal temperature; Semiárido; Supplementary feeding; Supplementation.	
Thesagro: 	Caatinga; Cabra Leiteira; Caprino; Microelemento Mineral; Produção Animal; Selênio; Suplemento Mineral; Termorregulação.	
Thesaurus Nal: 	Animal welfare; Brazil; Dairy goats; Heat stress; Milk yield; Physiological regulation; Respiratory rate; Semiarid zones; Small ruminants; Trace elements.	
Categoria do assunto: 	L Ciência Animal e Produtos de Origem Animal	
Registro original: 	Embrapa Caprinos e Ovinos (CNPC)	
Exemplares: 	CNPC - (40642-1) - UPC - AP - DD -  -  -  - DIS