Bulls grazing Kentucky 31 tall fescue exhibit impaired growth, semen quality, and decreased semen freezing potential

Serum prolactin (PRL) and testosterone concentrations, body weight, body composition, semen quality, and semen freezing potential for bulls grazing the toxic tall fescue (Lolium arundinaceum [Schreb.] Darbysh. = Schedonorous arundinaceum [Schreb.] Dumort.) cultivar Kentucky 31 (E+) compared with a n...

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Bibliographic Details
Published in:Theriogenology 2015-02, Vol.83 (3), p.408-414
Main Authors: Pratt, S.L., Stowe, H.M., Whitlock, B.K., Strickland, L., Miller, M., Calcatera, S.M., Dimmick, M.D., Aiken, G.E., Schrick, F.N., Long, N.M., Duckett, S.K., Andrae, J.G.
Format: Article
Language:English
Subjects:
Animals
Breeding soundness examination
Cattle - physiology
Computerized sperm-quality analysis
Cryopreservation - veterinary
Ergot Alkaloids - metabolism
Feeding Behavior
Fescue toxicosis
Lolium - toxicity
Male
Organ Size
Prolactin - blood
Scrotal circumference
Scrotum - anatomy & histology
Semen Analysis - veterinary
Semen freezing
Testosterone - blood
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Summary:Serum prolactin (PRL) and testosterone concentrations, body weight, body composition, semen quality, and semen freezing potential for bulls grazing the toxic tall fescue (Lolium arundinaceum [Schreb.] Darbysh. = Schedonorous arundinaceum [Schreb.] Dumort.) cultivar Kentucky 31 (E+) compared with a novel endophyte cultivar lacking ergot alkaloids (E−) were evaluated. Angus bulls were allotted to treatment (Day 0) and grazed E+ or E− for 155 days. Treatment-by-day interaction was significant (P  0.05). Further, bulls on the E+ treatment exhibited decreased total gain, average daily gain, and body weight by Day 140 (P 
ISSN:0093-691X
1879-3231
DOI:10.1016/j.theriogenology.2014.10.001