Anabolic Implants Varying in Hormone Type and Concentration Influence Performance, Feeding Behavior, Carcass Characteristics, Plasma Trace Mineral Concentrations, and Liver Trace Mineral Concentrations of Angus Sired Steers

Autor:	Laura A. Motsinger, Brett Bowman, Stephanie L. Hansen, Reganne K Briggs, Tevan J Brady, Elizabeth M Messersmith, Caleb C Reichhardt, Kara J Thornton
Rok vydání:	2021
Předmět:	Anabolism Trace mineral growth Veterinary medicine implants Body weight Feed conversion ratio Article 03 medical and health sciences chemistry.chemical_compound Feeding behavior Animal science estradiol SF600-1100 030304 developmental biology 0303 health sciences General Veterinary Chemistry zinc 0402 animal and dairy science 04 agricultural and veterinary sciences Trenbolone acetate 040201 dairy & animal science QL1-991 manganese Animal Science and Zoology Implant Zoology trenbolone acetate Hormone
Zdroj:	Animals, Vol 11, Iss 1964, p 1964 (2021) Animals : an Open Access Journal from MDPI Animals Volume 11 Issue 7
ISSN:	2076-2615
Popis:	Fifty Angus-sired steers were utilized to evaluate the effects of anabolic implants varying in hormone type and concentration on performance, carcass traits, and plasma and liver trace mineral concentrations over 129 d. Steers were stratified by weight into one of four (n = 12 or 13/treatment) implant treatments: (1) estradiol (E2 25.7 mg E2 Compudose, Elanco Animal Health, Greenfield, IN, USA), (2) trenbolone acetate (TBA 200 mg TBA Finaplix-H, Merck Animal Health, Madison, NJ, USA), (3) combination implant (ETBA 120 mg TBA + 24 mg E2 Revalor-S, Merck Animal Health), or (4) no implant (CON). Steers were randomly assigned to pens equipped with GrowSafe bunks and fed a corn and barley-based finishing ration. Overall average daily gain and body weight were greater for ETBA and TBA than CON (p ≤ 0.04), but not E2 (p ≥ 0.12). Feed efficiency and hot carcass weight were only greater than CON for ETBA (p ≤ 0.03). Plasma and d 2 liver Zn concentrations were lesser for ETBA than CON (p ≤ 0.01) and d 10 liver Mn was lesser (p = 0.0003) for TBA than CON. These data indicate that implants containing TBA influence growth and trace mineral parameters, though more work investigating this relationship is necessary.
Databáze:	OpenAIRE
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