Effects of Implanting Beef Steers with Zeranol on Fatty Acid Composition of Subcutaneous and Intramuscular Fat

R. M. Ibrahim, John A Marchello, G. C. Duff

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

The effect of implanting with zeranol on modulation of fatty acid composition, including omega-3 and omega-6 fatty acids, of subcutaneous (s.c.) and i.m. fat of steers was investigated, and carcasses were evaluated for quality grade and yield grade components. Forty steers were divided into 2 groups (20 steers/group); both groups were fed the same diet. Steers were fed to a constant 10 mm fat thickness (measured by ultrasound). Implanting had no effect (P > 0.05) on quality or yield grade components, but the concentration of polyunsaturated fatty acids (PUFA), including n-3 and n- 6 fatty acids, was greater (P <0.05) in the s.c. fat of implanted vs. non-implanted steers. Concentration of the saturated fatty acids (SFA) was less (P <0.05) in the s.c. fat of implanted steers than in the s.c. fat of non-implanted steers. However, the amount of monounsaturated fatty acids was greater (P <0.05) in the s.c. fat of non-implanted steers than in the s.c. fat of implanted steers. In the i.m. fat of implanted steers, the content of PUFA, including n-3 and n-6 fatty acids, and the amount of one monounsaturated fatty acid were greater (P <0.05) than in the i.m. fat of non-implanted steers. The concentration of SFA was less (P <0.05) in the i.m. fat of implanted vs. non-implanted steers. Implantation with zeranol caused an increase in the unsaturated:saturated fatty acid ratio and an increase in n-3:n-6 PUFA ratio. These results indicated that zeranol had no effect on carcass quality, but it had a positive effect in changing the fatty acid composition of the s.c. and the i.m. fat of steers from the saturated to unsaturated.

Original languageEnglish (US)
Pages (from-to)301-306
Number of pages6
JournalProfessional Animal Scientist
Volume22
Issue number4
DOIs
StatePublished - Aug 1 2006

Fingerprint

Zeranol
zeranol
Subcutaneous Fat
intramuscular fat
subcutaneous fat
beef cattle
Fatty Acids
fatty acid composition
Fats
Monounsaturated Fatty Acids
omega-6 fatty acids
Omega-3 Fatty Acids
Unsaturated Fatty Acids
Omega-6 Fatty Acids
saturated fatty acids
polyunsaturated fatty acids
lipids
monounsaturated fatty acids
Red Meat
Diet

Keywords

  • Fatty acids
  • Omega-3
  • Omega-6
  • Steers
  • Zeranol

ASJC Scopus subject areas

  • Animal Science and Zoology
  • Food Science

Cite this

Effects of Implanting Beef Steers with Zeranol on Fatty Acid Composition of Subcutaneous and Intramuscular Fat. / Ibrahim, R. M.; Marchello, John A; Duff, G. C.

In: Professional Animal Scientist, Vol. 22, No. 4, 01.08.2006, p. 301-306.

Research output: Contribution to journalArticle

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