Please use this identifier to cite or link to this item: https://hdl.handle.net/1959.11/14698
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dc.contributor.authorBrown, David Jamesen
dc.contributor.authorSavage, Darrylen
dc.contributor.authorHinch, Geoffreyen
dc.date.accessioned2014-04-14T14:28:00Z
dc.date.issued2014en
dc.identifier.citationAnimal Production Science, 54(2), p. 207-213en
dc.identifier.issn1836-0939en
dc.identifier.issn1836-5787en
dc.identifier.urihttps://hdl.handle.net/1959.11/14698en
dc.description.abstractSheep liveweight is an indicator of nutritional status, and its measure may be used as an aid to nutritional management. When walk-over weighing (WOW), a remote weighing concept for grazing sheep, is combined with radio frequency identification (RFID), resulting 'RFID-linked WOW' data may enable the liveweight of individual sheep to be tracked over time. We investigated whether RFID-linked WOW data is sufficiently repeatable and frequent to generate individual liveweight estimates with 95% confidence intervals (95% CI) of <2 kg (a sufficient level of error to account for fluctuating gut fill) for a flock within timeframes suitable for management (1-day and 5-day timeframes). Four flocks of sheep were used to generate RFID-linked WOW datasets. RFID-linked WOW data were organised into three groups: raw (unfiltered), coarse filtered (remove all sheep-weights outside the flock's liveweight range), and fine filtered (remove all sheep-weights outside a 25% range of a recent flock average reference liveweight). The repeatability of raw (unfiltered) RFID-linked WOW data was low (0.20), while a coarse (0.46) and fine (0.76) data filter improved repeatability. The 95% CI of raw RFID-linked WOW data was 27 kg, and was decreased by a coarse (11 kg) and fine (6 kg) data filter. Increasing the number of raw, coarse and fine-filtered data points to 190, 30 and 12 sheep-weights, respectively, decreased the 95% CI to <2 kg. The mean cumulative percentage of sheep achieving >11 fine-filtered RFID-linked WOW sheep-weights within a 1-day and 5-day timeframe was 0 and 10%, respectively. The null hypothesis was accepted: RFID-linked WOW data had low repeatability and was unable to generate liveweight estimates with a 95% CI of less than 2 kg within a suitable timeframe. Therefore, at this stage, RFID-linked WOW is not recommended for on-farm decision making of individual sheep.en
dc.languageenen
dc.publisherCSIRO Publishingen
dc.relation.ispartofAnimal Production Scienceen
dc.titleRepeatability and frequency of in-paddock sheep walk-over weights: implications for individual animal managementen
dc.typeJournal Articleen
dc.identifier.doi10.1071/AN12311en
dcterms.accessRightsGolden
dc.subject.keywordsAnimal Managementen
local.contributor.firstnameDavid Jamesen
local.contributor.firstnameDarrylen
local.contributor.firstnameGeoffreyen
local.subject.for2008070203 Animal Managementen
local.subject.seo2008830311 Sheep - Woolen
local.profile.schoolSchool of Environmental and Rural Scienceen
local.profile.schoolSchool of Environmental and Rural Scienceen
local.profile.emaildavidb@holmessackett.com.auen
local.profile.emaildsavage2@une.edu.auen
local.profile.emailghinch@une.edu.auen
local.output.categoryC1en
local.record.placeauen
local.record.institutionUniversity of New Englanden
local.identifier.epublicationsrecordune-20140317-151043en
local.publisher.placeAustraliaen
local.format.startpage207en
local.format.endpage213en
local.peerreviewedYesen
local.identifier.volume54en
local.identifier.issue2en
local.title.subtitleimplications for individual animal managementen
local.access.fulltextYesen
local.contributor.lastnameBrownen
local.contributor.lastnameSavageen
local.contributor.lastnameHinchen
dc.identifier.staffune-id:dbrown33en
dc.identifier.staffune-id:dsavage2en
dc.identifier.staffune-id:ghinchen
local.profile.orcid0000-0003-4731-865Xen
local.profile.roleauthoren
local.profile.roleauthoren
local.profile.roleauthoren
local.identifier.unepublicationidune:14913en
local.identifier.handlehttps://hdl.handle.net/1959.11/14698en
dc.identifier.academiclevelAcademicen
dc.identifier.academiclevelAcademicen
dc.identifier.academiclevelAcademicen
dc.identifier.academiclevelAcademicen
local.title.maintitleRepeatability and frequency of in-paddock sheep walk-over weightsen
local.output.categorydescriptionC1 Refereed Article in a Scholarly Journalen
local.description.statisticsepubsVisitors: 252<br />Views: 253<br />Downloads: 1en
local.search.authorBrown, David Jamesen
local.search.authorSavage, Darrylen
local.search.authorHinch, Geoffreyen
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