Please use this identifier to cite or link to this item: https://hdl.handle.net/1959.11/8931
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dc.contributor.authorDoyle, Emmaen
dc.contributor.authorKahn, Lewisen
dc.contributor.authorMcClure, Susan Jen
dc.contributor.authorLea, James Men
dc.date.accessioned2011-11-29T14:42:00Z-
dc.date.issued2011-
dc.identifier.citationVeterinary Parasitology, 177(3-4), p. 316-323en
dc.identifier.issn1873-2550en
dc.identifier.issn0304-4017en
dc.identifier.urihttps://hdl.handle.net/1959.11/8931-
dc.description.abstractThis research was designed to determine if divergent selection for resistance to 'Haemonchus contortus' had produced correlated changes in voluntary feed intake and diet selection. Voluntary feed intake, diet selection and production were determined in 54 Merino weaner rams from the CSIRO 'Haemonchus' selection flock, increased resistance to 'Haemonchus' (IRH), decreased resistance to 'Haemonchus' (DRH) and random bred control (C) selection lines. Weaner rams were fed ad libitum either a high (9.2 MJ ME/kg DM, 90 g MP/kg DM) or moderate (6.3 MJ ME/kg DM, 30 g MP/kg DM) quality diet and given the choice between the two diets, when uninfected (NIL) or infected with 'H. contortus' (INF). Symmetrical response to divergent selection for worm egg count (WEC) was not matched by a symmetrical change in feed intake and there was no difference in diet selection between selection lines. Feed intake, growth and wool production of DRH animals remained the same as that of IRH, yet DRH animals had five times greater WEC than IRH. This study begins to explain the mechanisms that allow resistant animals to effectively prevent establishment and/or development of 'H. contortus', by maintaining a greater immune response to infection through higher circulating eosinophils, plasma globulin and IgG₁ antibody titres. Susceptible animals have displayed resilience by improving feed conversion efficiency and increasing protein synthesis.en
dc.languageenen
dc.publisherElsevier BVen
dc.relation.ispartofVeterinary Parasitologyen
dc.titleVoluntary feed intake and diet selection of Merino sheep divergently selected for genetic difference in resistance to 'Haemonchus contortus'en
dc.typeJournal Articleen
dc.identifier.doi10.1016/j.vetpar.2011.01.043en
dc.subject.keywordsVeterinary Parasitologyen
local.contributor.firstnameEmmaen
local.contributor.firstnameLewisen
local.contributor.firstnameSusan Jen
local.contributor.firstnameJames Men
local.subject.for2008070708 Veterinary Parasitologyen
local.subject.seo2008830311 Sheep - Woolen
local.profile.schoolSchool of Environmental and Rural Scienceen
local.profile.schoolOffice of Faculty of Science, Ag, Business and Lawen
local.profile.schoolAnimal Scienceen
local.profile.emailedoyle3@une.edu.auen
local.profile.emaillkahn3@une.edu.auen
local.profile.emailjlea3@une.edu.auen
local.output.categoryC1en
local.record.placeauen
local.record.institutionUniversity of New Englanden
local.identifier.epublicationsrecordune-20111128-16053en
local.publisher.placeNetherlandsen
local.format.startpage316en
local.format.endpage323en
local.identifier.scopusid79954591725en
local.peerreviewedYesen
local.identifier.volume177en
local.identifier.issue3-4en
local.contributor.lastnameDoyleen
local.contributor.lastnameKahnen
local.contributor.lastnameMcClureen
local.contributor.lastnameLeaen
dc.identifier.staffune-id:edoyle3en
dc.identifier.staffune-id:lkahn3en
dc.identifier.staffune-id:jlea3en
local.profile.orcid0000-0002-5255-2187en
local.profile.orcid0000-0002-3679-4530en
local.profile.roleauthoren
local.profile.roleauthoren
local.profile.roleauthoren
local.profile.roleauthoren
local.identifier.unepublicationidune:9121en
dc.identifier.academiclevelAcademicen
dc.identifier.academiclevelAcademicen
dc.identifier.academiclevelAcademicen
local.title.maintitleVoluntary feed intake and diet selection of Merino sheep divergently selected for genetic difference in resistance to 'Haemonchus contortus'en
local.output.categorydescriptionC1 Refereed Article in a Scholarly Journalen
local.search.authorDoyle, Emmaen
local.search.authorKahn, Lewisen
local.search.authorMcClure, Susan Jen
local.search.authorLea, James Men
local.uneassociationUnknownen
local.identifier.wosid000290696800016en
local.year.published2011en
Appears in Collections:Journal Article
School of Environmental and Rural Science
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