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Growth, carcass and palatability traits of intact males and steers implanted with zeranol or estradiol early and throughout life.
J Anim Sci 1986; 62(3):625-31JA

Abstract

This study was conducted to assess the impact of implanting intact beef males with protein anabolic agents at varying intervals throughout life. Ninety-six intact males were assigned to three implant treatments: 1) not implanted, 2) implanted at 9 wk of age, weaning and at 56-d intervals thereafter with a 36-mg zeranol implant or 3) estradiol implant at 9 wk of age and 68 d post-weaning. During the 118-d, post-weaning growing period, eight animals per treatment (one replication) were castrated. After a 114-d finishing period, cattle were slaughtered (average age of 13 to 14 mo). Feedlot performance, carcass and palatability data were obtained. Average daily gains and feed efficiency did not differ (P greater than .05) between zeranol and estradiol-implanted intact males. Regardless of implant treatment, steers had lighter carcass weights (P less than .05) and higher (P less than .01) quality grades than intact males. Implanting either intact males or steers with zeranol or estradiol resulted in higher (P less than .05) numerical yield grades. Quality grades were higher in zeranol-implanted cattle than the non-implanted or estradiol-implanted cattle. Intact males implanted with zeranol were similar in carcass fatness to zeranol-implanted steers. No differences (P greater than .05) in tenderness or connective tissue were detected. Implanting intact males early and throughout life with zeranol made them similar to steers in fatness, while estradiol implantation had few effects on carcass and palatability traits of intact males or steers.

Authors

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Pub Type(s)

Comparative Study
Journal Article

Language

eng

PubMed ID

3700262

Citation

Calkins, C R., et al. "Growth, Carcass and Palatability Traits of Intact Males and Steers Implanted With Zeranol or Estradiol Early and Throughout Life." Journal of Animal Science, vol. 62, no. 3, 1986, pp. 625-31.
Calkins CR, Clanton DC, Berg TJ, et al. Growth, carcass and palatability traits of intact males and steers implanted with zeranol or estradiol early and throughout life. J Anim Sci. 1986;62(3):625-31.
Calkins, C. R., Clanton, D. C., Berg, T. J., & Kinder, J. E. (1986). Growth, carcass and palatability traits of intact males and steers implanted with zeranol or estradiol early and throughout life. Journal of Animal Science, 62(3), pp. 625-31.
Calkins CR, et al. Growth, Carcass and Palatability Traits of Intact Males and Steers Implanted With Zeranol or Estradiol Early and Throughout Life. J Anim Sci. 1986;62(3):625-31. PubMed PMID: 3700262.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Growth, carcass and palatability traits of intact males and steers implanted with zeranol or estradiol early and throughout life. AU - Calkins,C R, AU - Clanton,D C, AU - Berg,T J, AU - Kinder,J E, PY - 1986/3/1/pubmed PY - 1986/3/1/medline PY - 1986/3/1/entrez SP - 625 EP - 31 JF - Journal of animal science JO - J. Anim. Sci. VL - 62 IS - 3 N2 - This study was conducted to assess the impact of implanting intact beef males with protein anabolic agents at varying intervals throughout life. Ninety-six intact males were assigned to three implant treatments: 1) not implanted, 2) implanted at 9 wk of age, weaning and at 56-d intervals thereafter with a 36-mg zeranol implant or 3) estradiol implant at 9 wk of age and 68 d post-weaning. During the 118-d, post-weaning growing period, eight animals per treatment (one replication) were castrated. After a 114-d finishing period, cattle were slaughtered (average age of 13 to 14 mo). Feedlot performance, carcass and palatability data were obtained. Average daily gains and feed efficiency did not differ (P greater than .05) between zeranol and estradiol-implanted intact males. Regardless of implant treatment, steers had lighter carcass weights (P less than .05) and higher (P less than .01) quality grades than intact males. Implanting either intact males or steers with zeranol or estradiol resulted in higher (P less than .05) numerical yield grades. Quality grades were higher in zeranol-implanted cattle than the non-implanted or estradiol-implanted cattle. Intact males implanted with zeranol were similar in carcass fatness to zeranol-implanted steers. No differences (P greater than .05) in tenderness or connective tissue were detected. Implanting intact males early and throughout life with zeranol made them similar to steers in fatness, while estradiol implantation had few effects on carcass and palatability traits of intact males or steers. SN - 0021-8812 UR - https://www.unboundmedicine.com/medline/citation/3700262/Growth_carcass_and_palatability_traits_of_intact_males_and_steers_implanted_with_zeranol_or_estradiol_early_and_throughout_life_ L2 - https://academic.oup.com/jas/article-lookup/doi/10.2527/jas1986.623625x DB - PRIME DP - Unbound Medicine ER -