HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Google Scholar Articles by Beermann, D. H. Articles by Ricks, C. A. Search for Related Content PubMed Articles by Beermann, D. H. Articles by Ricks, C. A.

Effects of Cimaterol and Fishmeal on Performance, Carcass Characteristics and Skeletal Muscle Growth in Lambs¹

Cornell University, Ithaca, NY 14853 and American Cyanamid Company, Princeton, NJ 08540

Abstract

Two experiments were conducted in which cimaterol [CL263,780; (anthranilo-nitrile, 5-[1-hydroxy-2-(isopropylamino) ethyl]-)] was fed at 0 or 10 ppm in a complete, mixed, high-concentrate diet to assess effects on growth performance and repartitioning of tissue growth in young, rapidly growing lambs. Average daily gain and feed efficiency (F/G) were not altered in Dorset wether lambs fed cimaterol for 6 or 11 wk in Exp. 1. Average daily gain and F/G were improved 16% (P<.05) in Suffolk x Dorset ram lambs fed cimaterol for 5 wk, but not 10 wk in Exp. 2. Cimaterol increased dressing percent by at least 3 percentage units (P<.05), increased longissimus area 26 and 32% (P-C.001), reduced 12th-rib fat thickness 66 and 32% (P<.001) and reduced kidney and pelvic fat 34 and 44% (P<,001) at 6 wk and 12 wk, respectively (Exp. 1). Proximal hindleg muscles were 26% heavier (P<.001) in cimaterol-fed lambs in Exp. 1. Fishmeal (FM) replaced an equal amount of soy protein (3% of diet) to create a 2 x 2 x 2 factorial arrangement in Exp. 2. Cimaterol effects on carcass traits and muscle growth were similar to those observed in Exp. 1. However, hindleg and foreleg muscle weights and longissmus area were 16% greater (P<.001) in FM-fed lambs at 10 wk, and the cimaterol-induced muscle hypertrophy was slightly reduced in these lambs. Fat measures were unaffected by FM. These data demonstrate that cimaterol effectively repartitions skeletal muscle and adipose tissue accretion, and fishmeal fed for 10 wk significantly enhances skeletal muscle growth in lambs.

¹ Supported by the College of Agr. and Life Sci. and by a grant from American Cyanamid Co. The technical assistance of H. Dickson, B. LaVorgna and L. Volel is gratefully acknowledged.

² Dept. of Anim. Sci.

³ American Cyanamid Co.

This article has been cited by other articles:

				N. Dabiri and M. L. Thonney Source and level of supplemental protein for growing lambs J Anim Sci, November 1, 2004; 82(11): 3237 - 3244. [Abstract] [Full Text] [PDF]

				S. A. Bloomfield, B. E. Girten, and S. E. Weisbrode Effects of vigorous exercise training and beta -agonist administration on bone response to hindlimb suspension J Appl Physiol, July 1, 1997; 83(1): 172 - 178. [Abstract] [Full Text] [PDF]