000			03006nab a2200361 i 4500
003			BR-BrBNA
005			20250428161138.0
008			250428b2020 bl.ar|pooa||| 00| 0 eng |
040			_aBR-BrBNA _beng
072			_aL50 _b5213
072			_aL01
100			_aAntonelo, Daniel Silva
100			_aGómez, Juan Fernando Morales
100			_aCônsolo, Nara Regina Brandão
100			_aMazon, Madeline Rezende
100			_aNubiato, Keni Eduardo Zanoni
100			_aSouza, Camilla de
100			_aSaran Netto, Arlindo
100			_aSilva, Saulo da Luz e
245			_aEffects of combining immunocastration and β-adrenergic agonists on the blood metabolites and their correlations with performance and carcass traits of finished Nellore cattle
500			_aPublicação on-line; 41 ref.; 2 illus; 7 tables; Sumaries (En)
520			_a ABSTRACT - The objective of this study was to evaluate the effects of combining immunocastration and β-adrenergic agonists (β-AA) on blood metabolites and their correlations with performance and carcass traits of Nellore cattle. Ninety-six Nellore males were distributed in a randomized block design with a 2×3 factorial arrangement. The factors were two sexual conditions (immunocastrated and non-castrated), and three diets (control, with no inclusion of β-AA; RH, with 300 mg of ractopamine hydrochloride/d; and ZH, with 80 mg of zilpaterol hydrochloride/animal/d). The trial was conducted during 100 d, during which animals were fed ZH and RH for the last 30 and 33 d, respectively. Blood metabolites related to lipid and protein metabolism were assessed at the baseline (0 d of β-AA supplementation) and after 13 and 30 d of β-AA supplementation. No effect of sexual condition × β-AA supplementation × time on feed interaction was observed. Combining immunocastration with β-AA supplementation modified cholesterol and non-sterified fatty acids concentrations without affecting protein metabolism. Immunocastration enhances lipogenesis and reduces skeletal muscle accretion by increasing high-density lipoprotein and triglycerides concentrations and decreasing creatinine and creatine kinase concentrations, respectively. Zilpaterol hydrochloride enhances skeletal muscle accretion by decreasing urea and total protein concentrations and increases creatinine and creatine kinase concentrations without modifying lipid metabolism. Keywords: animal production, physiology, ractopamine, testosterone, zilpaterol
650			_aGADO NELORE
650			_aCRIAÇÃO
650			_aCASTRAÇÃO
650			_aPRODUÇÃO ANIMAL
650			_aFISIOLOGIA ANIMAL
650			_aANÁLISE QUÍMICA
773	0		_03545 _9317600 _dViçosa-MG Sociedade Brasileira de Zootecnia 1997 _o2024-4310 _tRevista Brasileira de Zootecnia (Brazil) _x1516-3598 _gv. 49 p. 1-13; (2020) _wBR2025000649
856			_uhttps://www.scielo.br/j/rbz/a/CMHKpgyPcJwXpyqK3DxvDqs/?format=pdf&lang=en
942			_cANA
999			_c331235 _d331235