Show simple item record

dc.contributor.authorHatfield, P. G.
dc.contributor.authorClanton, D. C.
dc.contributor.authorSanson, D. W.
dc.contributor.authorEskridge, K. M.
dc.date.accessioned2020-09-24T02:37:32Z
dc.date.available2020-09-24T02:37:32Z
dc.date.issued1990-07-01
dc.identifier.citationHatfield, P. G., Clanton, D. C., Sanson, D. W., & Eskridge, K. M. (1990). Methods of administering ytterbium for estimation of fecal output. Journal of Range Management, 43(4), 316-320.
dc.identifier.issn0022-409X
dc.identifier.doi10.2307/3898924
dc.identifier.urihttp://hdl.handle.net/10150/644895
dc.description.abstractThree experiments were conducted with grazing and penned animals to evaluate the accuracy and precision of different methods of administering ytterbium (Yb) as a marker to estimate fecal output. A paired t test was used to evaluate differences between marker estimates of fecal output and fecal output measured by total collection. Marker administration methods within an experiment were compared in a one-way analysis of variance using the absolute percentage deviation of the marker estimates from total collection. In Experiment 1, wethers were confined in metabolism crates and orally administered either a pulse dose or a once daily dose. Both methods overestimated fecal output (7.3% for the once daily and 11.2% for the pulse dose method); however, the once daily dose was more precise (SE = .78%) than the pulse dose (SE = 2.17%). In Experiment 2, a crossover design with steers grazing dormant bromegrass pasture was employed to compare estimates of fecal output by pulse dosing and once daily dosing of Yb via rumen cannula. Although both methods underestimated fecal output (4.0% for the once daily and 11.5% for the pulse dose), once daily dosing was more precise (SE = 2.36%) than pulse dosing (SE = 3.64%). In Experiment 3, an intraruminal constant release Yb bolus was compared with daily feeding of Yb-labeled supplement using grazing and pen fed steers. The constant release bolus overestimated fecal output 13.8% on pasture and 41.3% in the pen study. Standard errors for the constant release bolus were 4.02% (pasture) and 4.76% (pen). Although use of Yb in a labeled supplement did not provide an accurate estimate of fecal output (80.1 and 106.0% of total collection on pasture and in pen, respectively), it had a lower SE than the constant release bolus method during both the pasture and pen studies. Once daily dosing was more precise than a pulse dose for estimating fecal output in Experiments 1 and 2. The constant release bolus used in Experiment 3 does not appear to be suitable for estimating fecal output of grazing cattle.
dc.language.isoen
dc.publisherSociety for Range Management
dc.relation.urlhttps://rangelands.org/
dc.rightsCopyright © Society for Range Management.
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/
dc.subjectelements
dc.subjectresearch methods
dc.subjectmarkers
dc.subjectfeces collection
dc.subjectaccuracy
dc.subjectestimation
dc.subjectgrazing experiments
dc.subjectfeces
dc.subjectsteers
dc.titleMethods of administering ytterbium for estimation of fecal output
dc.typetext
dc.typeArticle
dc.identifier.journalJournal of Range Management
dc.description.noteThis material was digitized as part of a cooperative project between the Society for Range Management and the University of Arizona Libraries.
dc.description.collectioninformationThe Journal of Range Management archives are made available by the Society for Range Management and the University of Arizona Libraries. Contact lbry-journals@email.arizona.edu for further information.
dc.eprint.versionFinal published version
dc.description.admin-noteMigrated from OJS platform August 2020
dc.source.volume43
dc.source.issue4
dc.source.beginpage316-320
refterms.dateFOA2020-09-24T02:37:32Z


Files in this item

Thumbnail
Name:
8499-8380-2-PB.pdf
Size:
657.5Kb
Format:
PDF

This item appears in the following Collection(s)

Show simple item record