Effects of administration of ergotamine tartrate on fertility of yearling beef bulls

Effects of administration of ergotamine tartrate on fertility of yearling beef bulls

Sixteen yearling bulls were utilized to investigate administration of ergotamine tartrate on semen parameters, fertilization, and endocrinology. Bulls were allotted to a control diet of cracked corn, corn silage, and soybean meal (CON, n = 8) or a diet supplemented daily with 40 μg/kg body weight of...

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Bibliographic Details
Published in:Theriogenology Vol. 63; no. 5; pp. 1407 - 1418
Main Authors: Schuenemann, Gustavo M., Edwards, J. Lannett, Davis, Mark D., Blackmon, Heather E., Scenna, Fernando N., Rohrbach, Nancy R., Saxton, Arnold M., Adair, H. Stephen, Hopkins, Fred M., Waller, John C., Schrick, F. Neal
Format: Journal Article
Language:English
Published: United States Elsevier Inc 15-03-2005
Subjects:
Animals
Body Temperature
Bull
Cattle - physiology
cell cleavage
Cleavage Stage, Ovum
Diet
embryogenesis
Embryonic Development
Ergotamine - toxicity
Ergotamine tartrate
Fertility
Fertility - drug effects
Fertilization in Vitro - veterinary
Fescue toxicosis
Male
male fertility
Prolactin - blood
Scrotum - anatomy & histology
Scrotum - physiology
Sperm Motility
Spermatozoa
Spermatozoa - abnormalities
Testosterone - blood
Ergotamine tartrate
Spermatozoa
Fescue toxicosis
Bull
Fertility
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Summary:Sixteen yearling bulls were utilized to investigate administration of ergotamine tartrate on semen parameters, fertilization, and endocrinology. Bulls were allotted to a control diet of cracked corn, corn silage, and soybean meal (CON, n = 8) or a diet supplemented daily with 40 μg/kg body weight of ergotamine tartrate (ET, n = 8). Blood samples, average daily gain, scrotal circumference and rectal temperatures were collected every 14 day. Semen samples were obtained every 60 day and evaluated for motility and morphology. Scrotal temperatures were obtained by thermography immediately before electroejaculation. Semen from a subset of bulls from each treatment was also evaluated for in vitro fertilization. Administration of ET increased rectal temperature and resulted in lower scrotal temperatures compared to CON bulls ( P < 0.05). However, prolactin, scrotal circumference, testosterone, and semen motility and morphology did not differ between groups throughout the experimental period (224 day). Cleavage rates of embryos derived from in vitro fertilization (IVF) with semen of bulls, fed with ET, were reduced compared to CON ( P < 0.05); however, development of cleaved embryos to blastocyst did not differ between treatments. In conclusion, extended exposure of bulls to ET appeared to reduce fertilization potential of sperm.
ISSN:0093-691X
1879-3231
DOI:10.1016/j.theriogenology.2004.07.014