Effects of Compudose® and Rumensin®, alone or in combination, on the growth, and carcass and meat quality of steers finished on pasture

Abstract

Rumensin® (monensin sodium) and Compudose® (oestradiol-176) can both promote liveweight gain of pasture-fed cattle. Limited information exists about their effects on carcass and meat quality characteristics or their combined effects on beef cattle performance. This study examined the effects of Rumensin (R) and Compudose (C), alone and in combination, on the growth, carcass characteristics, and meat quality of steers finished at pasture. Seventy-two yearling steers (290 ± 4 kg) received either no treatment, R, C, or R+C for the 266-day experimental period. C led to increased liveweight gain (P < 0.001) but R had no effect and the R x C interaction was not significant. Weight-corrected height was lower (P < 0.05) in Compudose-treated cattle. R had no significant effect on any carcass or meat quality traits and no interactions with C were found. Compudose treatment increased carcass weight (P < 0.001) and dressing-out percentage (P < 0.05), and decreased kidney + pelvic fat weight (P < 0.005) and side length (P < 0.01). Compudose decreased M. longissimus ultimate pH (P < 0.001) and increased meat brightness L* (P < 0.05), but Warner-Bratzler peak shear values were higher (P < 0.05) in meat of the C group. It is concluded that R has little effect on growth, or carcass or meat characteristics of steers at pasture, and that it A96053 Received 10 July 1996; accepted 22 November 1996 has no influence on the way C affects these characteristics.

Skeletal growth in cattle in response to nutritional and hormonal manipulation

“…This was also found in the BCS that tend to be greater in E2 steers than the two other groups, although it did not attain statistical significance. In contrast, a study in the use of HGP (Compudose® and Rumensin® in finishing steers) showed that the implant treatment significantly increased the BCS along with the increase of LWG (Burnham et al 1997). The difference between the current study and the study of Burnham et al (1997) was probably due to the small number of measurements conducted in the current experiment prevented the detection of significance.…”

The effect of feeding antibiotic growth promoters on the performance of beef cattle consuming forage-based diets: A review

“…Cattle (13,410 animals; 247 ± 41 kg BW) were British, Continental or B. indicus breeds. References: Monensin: Bagley et al, 1981;Bagley and Feazel, 1989;Burnham et al, 1997;Cochran et al, 1990;Darden and Wolfrom, 1988;Davenport et al, 1989;Horn et al, 1981;Horn et al, 1988;Keith et al, 1995;Merrill and Stobbs, 1986;Muller et al, 1986;Oliver, 1975;Parrott et al, 1990;Parrott et al, 1986;Potter et al, 1976;Potter et al, 1986;Rossi et al, 1997;Rouquette et al, 1980;Smith et al, 1995;Spears et al, 1989;Utley et al, 1976;Wagner et al, 1984. Lasalocid: Andersen andHorn, 1987;Delcurto et al, 1989;Keith et al, 1995;Paterson et al, 1983;Rode, 1987;Rode et al, 1994;Spears and Harvey, 1984;Thonney et al, 1981;Valdes et al, 1988;Worrell et al, 1990.…”

“…Since monensin X implant interaction (P N 0.8), the main effects are presented. This analysis included 16 comparisons (n = 4, Burnham et al, 1997;Cochran et al, 1990;Parrott et al, 1990;Wagner et al, 1984). Repetitions/ comparison (mean ± S.D.)…”

Comparison of alternative beef production systems based on forage finishing or grain-forage diets with or without growth promotants: 2. Meat quality, fatty acid composition, and overall palatability

“…Larsen and Grunert, 2003). Although the use of ionophores has been shown to have a limited effect on meat quality (Boucqué et al, 1982;Burnham et al, 1997), the use of hormonal implants may increase the incidence of dark cutters and beef toughness (Scanga et al, 1998;Roeber et al, 2000;Barham et al, 2003). However, implants can have variable impacts on intramuscular fatty acid profile depending on composition and duration of implant used (Kennett and Siebert, 1987;Duckett et al, 1999).…”