G. Ripoll, M. Joy and A. Sanz commercial categories of lamb Estimation of carcass composition by ultrasounds in four anatomical locations of three published online June 18, 2010 J ANIM SCI http://jas.fass.org/content/early/2010/06/18/jas.2009-2632 the World Wide Web at: The online version of this article, along with updated information and services, is located on www.asas.org by guest on July 5, 2011 jas.fass.org Downloaded from