Adipose tissue partitioning of limit-fed beef cattle and beef cattle with ad libitum access to feed differing in adaptation to heat

Journal of Animal Science
J E SprinkleJ W Stuth

Abstract

We compared fat distribution and lipoprotein lipase (LPL) activity in steers differing in adaptability to the subtropics. Steers were fed a grain diet (3.13 Mcal ME/kg DM) at limited (150 kcal ME x kg[-.75] x d[-1]; .23 kg ADG) or ad libitum levels for 140 d, then slaughtered. Sixteen British- (8 Angus, 8 Hereford; S), 16 Boran- (R), 16 Brahman- (B), and 16 Tuli- (T) cross steers from MARC III composite cows were used. Adipose tissue samples from perirenal, omental, and subcutaneous depots were analyzed for LPL activity. Carcass measurements including omental, external, and seam fat trim from 1/ 2 of the carcass were measured. Subcutaneous fat had greater (P < .05) LPL activity than fat from the other depots. Generally, there were no differences (P > .05) in fat distribution for steers fed at limited levels. Means for ADG, slaughter weights, carcass weights, yield grades, and carcass lipid weights for S and B fed for ad libitum intake were greater (P < .05) than those for T and R. Marbling was greatest (P < .05) for S and did not differ (P > .05) for the other breeds with ad libitum intake. Factor analysis of fat depots for animals with ad libitum intake indicated that Bos taurus cattle differing in adaptation to heat deposited...Continue Reading

Citations

Oct 13, 2006·Journal of Animal Science·M J McPheeR D Sainz
Jul 1, 2010·Animal : an International Journal of Animal Bioscience·M BonnetB Picard
Apr 10, 2020·Journal of Veterinary Pharmacology and Therapeutics·Zhoumeng LinJim E Riviere
Jan 13, 2015·TheScientificWorldJournal·Gustavo Chamon de Castro MenezesJarbas Miguel da Silva Junior
Apr 19, 2018·Journal of Animal Science·Sam W ColemanDavid Greg Riley

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