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Influence of zeranol implants on growth, behavior and carcass traits in Angus and Limousin bulls and steers.
J Anim Sci 1985; 61(2):310-9JA

Abstract

A 2(3) factorial arrangement of treatments was utilized to determine effects of postweaning zeranol implantation, breed (Angus vs Limousin) and castration (bull vs steer) on growth, behavior and carcass traits. An initial slaughter group was used to account for breed differences in composition and to determine fat and lean growth in the 9-10-11th rib section (NTE). The remaining cattle were fed a finishing diet to a fat end point of .76 cm, as determined by a backfat probe. Control bulls outgained (P less than .01) control steers both to the first kill date and over the entire test and did not require significantly more time to reach the fat end point. The implant did not influence gain in bulls but did increase gain in steers. Angus and Limousins were similar in growth rate for the first 126 d before the first slaughter date. Limousins required more (P less than .01) time to reach the fat end point. Bulls and Limousins produced heavier (P less than .01) carcasses and larger rib eyes (P less than .05; bulls; P less than .01; Limousins). Steers and Angus had higher (P less than .01) marbling scores and lower bone maturity. Implanting decreased (P less than .05) marbling and increased carcass maturity. Small but significant shifts in carcass wholesale cut weight distribution were found between breed and sex condition groups. Bulls and Limousins had greater lean growth in the NTE. Bulls and steers were similar in fat growth, but Angus exceeded Limousin in this trait. Zeranol reduced scrotal circumference (P less than .01) and testicle weight at slaughter (P less than .05).(

ABSTRACT

TRUNCATED AT 250 WORDS)

Authors

No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

4044429

Citation

Vanderwert, W, et al. "Influence of Zeranol Implants On Growth, Behavior and Carcass Traits in Angus and Limousin Bulls and Steers." Journal of Animal Science, vol. 61, no. 2, 1985, pp. 310-9.
Vanderwert W, Berger LL, McKeith FK, et al. Influence of zeranol implants on growth, behavior and carcass traits in Angus and Limousin bulls and steers. J Anim Sci. 1985;61(2):310-9.
Vanderwert, W., Berger, L. L., McKeith, F. K., Baker, A. M., Gonyou, H. W., & Bechtel, P. J. (1985). Influence of zeranol implants on growth, behavior and carcass traits in Angus and Limousin bulls and steers. Journal of Animal Science, 61(2), pp. 310-9.
Vanderwert W, et al. Influence of Zeranol Implants On Growth, Behavior and Carcass Traits in Angus and Limousin Bulls and Steers. J Anim Sci. 1985;61(2):310-9. PubMed PMID: 4044429.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Influence of zeranol implants on growth, behavior and carcass traits in Angus and Limousin bulls and steers. AU - Vanderwert,W, AU - Berger,L L, AU - McKeith,F K, AU - Baker,A M, AU - Gonyou,H W, AU - Bechtel,P J, PY - 1985/8/1/pubmed PY - 1985/8/1/medline PY - 1985/8/1/entrez SP - 310 EP - 9 JF - Journal of animal science JO - J. Anim. Sci. VL - 61 IS - 2 N2 - A 2(3) factorial arrangement of treatments was utilized to determine effects of postweaning zeranol implantation, breed (Angus vs Limousin) and castration (bull vs steer) on growth, behavior and carcass traits. An initial slaughter group was used to account for breed differences in composition and to determine fat and lean growth in the 9-10-11th rib section (NTE). The remaining cattle were fed a finishing diet to a fat end point of .76 cm, as determined by a backfat probe. Control bulls outgained (P less than .01) control steers both to the first kill date and over the entire test and did not require significantly more time to reach the fat end point. The implant did not influence gain in bulls but did increase gain in steers. Angus and Limousins were similar in growth rate for the first 126 d before the first slaughter date. Limousins required more (P less than .01) time to reach the fat end point. Bulls and Limousins produced heavier (P less than .01) carcasses and larger rib eyes (P less than .05; bulls; P less than .01; Limousins). Steers and Angus had higher (P less than .01) marbling scores and lower bone maturity. Implanting decreased (P less than .05) marbling and increased carcass maturity. Small but significant shifts in carcass wholesale cut weight distribution were found between breed and sex condition groups. Bulls and Limousins had greater lean growth in the NTE. Bulls and steers were similar in fat growth, but Angus exceeded Limousin in this trait. Zeranol reduced scrotal circumference (P less than .01) and testicle weight at slaughter (P less than .05).(ABSTRACT TRUNCATED AT 250 WORDS) SN - 0021-8812 UR - https://www.unboundmedicine.com/medline/citation/4044429/Influence_of_zeranol_implants_on_growth_behavior_and_carcass_traits_in_Angus_and_Limousin_bulls_and_steers_ L2 - https://academic.oup.com/jas/article-lookup/doi/10.2527/jas1985.612310x DB - PRIME DP - Unbound Medicine ER -