Revista Veterinaria Zacatecas 2004 - UAZ
Revista Veterinaria Zacatecas 2004 - UAZ
Revista Veterinaria Zacatecas 2004 - UAZ
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24. Deschamps JC, Ott RS, Weston PG,<br />
Shanks RD, Kesler DJ, Bolt DJ, Hixon<br />
JE. Effects of zeranol on reproduction in<br />
beef bulls: Luteinizing hormone, follicle<br />
stimulating hormone and testosterone<br />
secretion in response to gonadotropinreleasing<br />
hormone and human chorionic<br />
gonadotropin. Am J Vet Res 1987; 48:<br />
31-36.<br />
25. Gray DG, Unruh JA, Dikeman ME,<br />
Stevenson JS. Implanting young bulls<br />
M A Gómez-Armendáriz et al.<br />
ABSTRACT<br />
from birth to four slaughter ages: III.<br />
Growth performance and endocrine<br />
aspects. J Anim Sci 1986; 63: 747-756.<br />
26. Amann RP, Wise ME, Glass JD, Nett<br />
TM. Prepuberal changes in the<br />
hypothalamic-pituitary axis of Holstein<br />
bulls. Biol Reprod 1986; 34: 71-80.<br />
27. Schanbacher BD. Regulation of<br />
luteinizing hormona secretion in male<br />
sheep by endogenous estrogen.<br />
Endocrinology 1984; 115: 944-950.<br />
Gómez-Armendáriz MA, Juan Ignacio Dávila Félix JI, Escobar Medina FJ. Weight gain in sheep<br />
treated with zeranol. Forty Khatadine x Dorper lambs (20 male and 20 female) received no treatment or 1 ml<br />
of Zeramec/50 Kg on 3 days after weaning (10 male and 10 female/group). Animals had a libitum access of<br />
water, sat, minerals and diet that covered their nutritional requirements; and were weighted and determined<br />
their feed intake every 28 days. After 90 days, the average weight gain was 9.25 and 11.60 Kg in the males<br />
treated with Zeramec and no treated, respectively; and 6.67 and 9.20 Kg in the females. The differences were<br />
not statistically significant (P>0.05). The feed intake was increased (P