Effects of Feeding Supplemental Eicosapentanoic Acid and Docosahexanoic Acid to Beef Females on Reproductive Responses and Free Fatty Acids

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dc.contributor.authorWuenschel, Jeffrey Carl Jr.en
dc.contributor.committeechairHall, John B.en
dc.contributor.committeememberBeal, Wilfred E.en
dc.contributor.committeememberKnowlton, Katharine F.en
dc.contributor.committeememberGreiner, Scott P.en
dc.contributor.departmentAnimal and Poultry Sciencesen
dc.date.accessioned2014-03-14T20:44:56Zen
dc.date.adate2006-09-25en
dc.date.available2014-03-14T20:44:56Zen
dc.date.issued2006-08-09en
dc.date.rdate2006-09-25en
dc.date.sdate2006-09-07en
dc.description.abstractThe objective of this study was to determine the effects of dietary supplementation of eicosapentanoic (EPA) and docosahexanoic acids (DHA) on reproduction in beef females. In experiment 1, cows (n = 31) were individually fed rumen protected fish meal (FM) or no fish meal (C) supplements. Estrus was synchronized and ovulation induced on d 37. Ovarian follicular growth and diameter were determined by ultrasound on d 35 and d 37. Serum progesterone (P4) profiles were analyzed on d 37 through d 52. On d 52 cows were cannulated, primed with estradiol-17&#946; at -240 min, and stimulated to release PGF2&#945; by oxytocin injection at 0 min with blood sampled every 15 min from -30 min to 240 min. Supplement type did not affect (P > 0.05) follicular diameter, follicular growth or P4 concentrations. In cows fed FM, prostaglandin metabolite (PGFM) concentrations tended (P &#8804; 0.10) to be reduced at 0, 30, and 60 min. In experiment 2, crossbred heifers (n = 214) received FM or C concentrates with corn silage from 30 d before estrous synchronization until 14 d after artificial insemination (AI). Serum fatty acid profiles were determined in five heifers from each group . Estrus detection and AI were conducted from d 37 through d 39. Dietary treatment increased (P < 0.05) EPA and DHA concentrations. Dietary treatment did not affect estrus response or AI conception rates and pregnancy rate. Supplementation of FM increased EPA and DHA concentrations but did not affect reproductive factors.en
dc.description.degreeMaster of Scienceen
dc.identifier.otheretd-09072006-110318en
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-09072006-110318/en
dc.identifier.urihttp://hdl.handle.net/10919/34958en
dc.publisherVirginia Techen
dc.relation.haspartthesisJeffbb.pdfen
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectProstaglandinen
dc.subjectNutritionen
dc.subjectReproductionen
dc.subjectBeef Cattleen
dc.subjectFatty Acidsen
dc.titleEffects of Feeding Supplemental Eicosapentanoic Acid and Docosahexanoic Acid to Beef Females on Reproductive Responses and Free Fatty Acidsen
dc.typeThesisen
thesis.degree.disciplineAnimal and Poultry Sciencesen
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen
thesis.degree.levelmastersen
thesis.degree.nameMaster of Scienceen

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