Please use this identifier to cite or link to this item: https://hdl.handle.net/1959.11/27233
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dc.contributor.authorAnderton, Len
dc.contributor.authorAccioly, J Men
dc.contributor.authorCopping, K Jen
dc.contributor.authorDeland, M P Ben
dc.contributor.authorHebart, M Len
dc.contributor.authorHerd, R Men
dc.contributor.authorJones, F Men
dc.contributor.authorLaurence, Men
dc.contributor.authorLee, S Jen
dc.contributor.authorSpeijers, E Jen
dc.contributor.authorWalmsley, B Jen
dc.contributor.authorPitchford, W Sen
dc.date.accessioned2019-06-20T23:07:27Z-
dc.date.available2019-06-20T23:07:27Z-
dc.date.issued2018-
dc.identifier.citationAnimal Production Science, 58(1), p. 103-116en
dc.identifier.issn1836-0939en
dc.identifier.issn1836-5787en
dc.identifier.urihttps://hdl.handle.net/1959.11/27233-
dc.description.abstractThe present paper focuses on the economic evaluation of the observed differences in maternal productivity of different genetic lines in Angus cattle that were managed under contrasting nutritional regimes typical of southern Australia. Five hundred Angus cows were managed concurrently at two locations in southern Australia. On each site, the cows were managed under the following two different nutritional treatments: High and Low, to simulate different stocking rates. Cows selected for a divergence in either carcass rib-fat depth or residual feed intake based on mid-parent estimated breeding values for those traits, were allocated in replicate groups to either High- or Low-nutrition treatments. By design, the supplementary feeding regime was the same for the High and Low genetic lines to ensure genetic differences were not confounded with management differences. Animal productivity results from the experiment were used as input data to evaluate the economic performance of the four genetic lines under the two nutritional treatments. Two methods were used; the first was a gross-margin calculation of income minus variable costs as AU$ per breeding cow for a 1000-cow herd; the second was a whole-farm linear programming model maximising the gross margin. Stocking rates were optimised by matching the energy requirements for the whole herd with the energy available from pasture and supplementary feed on a representative 700-ha farm. Using the two methods of calculating gross margin (per cow and optimised per hectare), including examination of sensitivity to changes in prices of cattle and supplementary feed, the present study demonstrated that genetically leaner cows due to selection of low fat or low residual feed intake, had gross margins superior to those of genetically fatter cows. They generated more income by selling more liveweight due to heavier weights and higher stocking rates. The results are affected by the management system utilised and some confounding with growth (leaner genetic lines had higher growth estimated breeding values), but will assist producers to make more informed decisions about how to manage animal breeding and nutritional interactions.en
dc.languageenen
dc.publisherCSIRO Publishingen
dc.relation.ispartofAnimal Production Scienceen
dc.titleDivergent genotypes for fatness or residual feed intake in Angus cattle. 7. Low-fat and low-RFI cows produce more liveweight and better gross margins than do high-fat and high-RFI cows when managed under the same conditionsen
dc.typeJournal Articleen
dc.identifier.doi10.1071/AN15636en
local.contributor.firstnameLen
local.contributor.firstnameJ Men
local.contributor.firstnameK Jen
local.contributor.firstnameM P Ben
local.contributor.firstnameM Len
local.contributor.firstnameR Men
local.contributor.firstnameF Men
local.contributor.firstnameMen
local.contributor.firstnameS Jen
local.contributor.firstnameE Jen
local.contributor.firstnameB Jen
local.contributor.firstnameW Sen
local.subject.for2008070201 Animal Breedingen
local.subject.seo2008830301 Beef Cattleen
local.profile.schoolSchool of Environmental and Rural Scienceen
local.profile.schoolAnimal Genetics and Breeding Uniten
local.profile.emailrherd3@une.edu.auen
local.profile.emailbwalms2@une.edu.auen
local.output.categoryC1en
local.record.placeauen
local.record.institutionUniversity of New Englanden
local.publisher.placeAustraliaen
local.format.startpage103en
local.format.endpage116en
local.peerreviewedYesen
local.identifier.volume58en
local.identifier.issue1en
local.contributor.lastnameAndertonen
local.contributor.lastnameAcciolyen
local.contributor.lastnameCoppingen
local.contributor.lastnameDelanden
local.contributor.lastnameHebarten
local.contributor.lastnameHerden
local.contributor.lastnameJonesen
local.contributor.lastnameLaurenceen
local.contributor.lastnameLeeen
local.contributor.lastnameSpeijersen
local.contributor.lastnameWalmsleyen
local.contributor.lastnamePitchforden
dc.identifier.staffune-id:rherd3en
dc.identifier.staffune-id:bwalms2en
local.profile.orcid0000-0003-4689-5519en
local.profile.roleauthoren
local.profile.roleauthoren
local.profile.roleauthoren
local.profile.roleauthoren
local.profile.roleauthoren
local.profile.roleauthoren
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local.profile.roleauthoren
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local.identifier.unepublicationidune:1959.11/27233en
local.date.onlineversion2016-09-07-
dc.identifier.academiclevelAcademicen
dc.identifier.academiclevelAcademicen
dc.identifier.academiclevelAcademicen
dc.identifier.academiclevelAcademicen
dc.identifier.academiclevelAcademicen
dc.identifier.academiclevelAcademicen
dc.identifier.academiclevelAcademicen
dc.identifier.academiclevelAcademicen
dc.identifier.academiclevelAcademicen
dc.identifier.academiclevelAcademicen
dc.identifier.academiclevelAcademicen
dc.identifier.academiclevelAcademicen
local.title.maintitleDivergent genotypes for fatness or residual feed intake in Angus cattle. 7. Low-fat and low-RFI cows produce more liveweight and better gross margins than do high-fat and high-RFI cows when managed under the same conditionsen
local.output.categorydescriptionC1 Refereed Article in a Scholarly Journalen
local.search.authorAnderton, Len
local.search.authorAccioly, J Men
local.search.authorCopping, K Jen
local.search.authorDeland, M P Ben
local.search.authorHebart, M Len
local.search.authorHerd, R Men
local.search.authorJones, F Men
local.search.authorLaurence, Men
local.search.authorLee, S Jen
local.search.authorSpeijers, E Jen
local.search.authorWalmsley, B Jen
local.search.authorPitchford, W Sen
Appears in Collections:Animal Genetics and Breeding Unit (AGBU)
Journal Article
School of Environmental and Rural Science
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