Method for promoting growth and improved meat quality in meat pr

Details Method for promoting growth and improved meat quality in meat pr Method for promoting growth and improved meat quality in meat pr

1992-05-04

1994-05-24

Waddell, Frederick E.

Drug, bio-affecting and body treating compositions

Designated organic active ingredient containing

Cyclopentanohydrophenanthrene ring system doai

514177, 514182, A61K 3156

Patent

active

053148827

ABSTRACT:
The growth rate of meat-producing animals as well as the yield and quality of the meat obtained therefrom is improved by administering to the animal prior to its sexual maturation an effective amount of a female gonadal steroidal compound; namely, an estrogen or progestagen compound and preferably a mixture thereof, sufficient to delay development of the gonadal function of the animal, e.g., spermatogenesis. Such administration is terminated sufficiently prior to slaughter of the animal that the administered steroidal compound has been substantially completely removed from the animal's system which before slaughter exhibits levels of the corresponding natural hormones therein substantially within normal limits. In mammals, administration is preferably by injection, but in fish, shellfish and poultry, the active steroidal compound is incorporated at low levels in the usual feed therefor. In mammals, the treatment is preferably applied to uncastrated males but can be extended to females and castrated males if desired; while in fish, shellfish and poultry administration is without regard to sex. The ratio of lean meat to fat is increased significantly by the treatment and in male mammals aggressiveness and odor development with consequential tainting of the meat is suppressed until slaughter.

REFERENCES:
patent: 3331356 (1967-07-01), Eckstein
patent: 3352684 (1967-11-01), Gard et al.
patent: 3636211 (1972-01-01), Jordan
Intensive Beef Production; 2nd Ed. (1974) pp. 288-304; Preston et al.
CA vol. 98 (1983) No. 19 Par. 159540w.
CA vol. 94 (1981) No. 17 Par. 132965u.
CA vol. 90 (1979) No. 3 Par. 21,265p.
CA vol. 70 (1969) No. 13 Par. 54,562y.
B. N. Day et al., Effects of Stilbestrol and a Combination of Progesterone and Estradiol on Growing-Finishing Swine, Missouri Agricultural Experiment Station, Columbia, pp. 898-901, 1960.
J. R. Brethour et al., Implanting Weaned Bull Calves with Zeranol and/or Trenbolone, American Society of Animal Science, Pullman, Wash., Jul. 26-29, 1983, three pages.
G. W. Thrasher et al., The Effect of Estrogenic and Androgenic Compounds Upon Growth and Carcass Composition of Swine, Purdue University Agricultural Experiment Station, Lafayette, Ind., pp. 399-409, 1972.

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