Please use this identifier to cite or link to this item: https://hdl.handle.net/1959.11/14350
Full metadata record
DC FieldValueLanguage
dc.contributor.authorWalkden-Brown, Steve Wen
dc.contributor.authorColvin, Alisonen
dc.contributor.authorHall, Elizabethen
dc.contributor.authorKnox, Malcolm Ren
dc.contributor.authorMacKay, Duncanen
dc.contributor.authorScott, Jim Men
dc.date.accessioned2014-03-24T14:13:00Z-
dc.date.issued2013-
dc.identifier.citationAnimal Production Science, 53(7-8), p. 765-779en
dc.identifier.issn1836-5787en
dc.identifier.issn1836-0939en
dc.identifier.urihttps://hdl.handle.net/1959.11/14350-
dc.description.abstractManaging infections of sheep with gastrointestinal nematode parasites (worms) and problems of resistance to anthelmintic treatments continue to be major challenges for graziers on the Northern Tablelands of New South Wales, Australia. The whole-farmlet study of grazing enterprises undertaken by the Cicerone Project tested the broad hypotheses that compared with typical management (farmlet B), internal parasites can be more effectively managed with improved nutrition (farmlet A) or by intensive rotational grazing (farmlet C). Further aims were to identify the major sources of variation in faecal worm egg count (WEC) over the 6-year period and to examine the efficacy of the various anthelmintic treatments used during the experiment. This paper describes the management of sheep worms at the whole-farmlet level during the experiment, and analyses data from the routine WEC monitoring (5644 records) and larval differentiation tests (322 records) carried out on behalf of the Cicerone Management Board and by a doctoral candidate. It complements more detailed investigations published elsewhere. Over the period from July 2000 to December 2006, worm infections in ewes, lambs, hoggets and wethers were, with some exceptions, successfully controlled on the farmlets through a combination of regular monitoring of WEC, treatment with a wide array of anthelmintics and grazing management. Farmlet C had lower mean WEC (444 epg) and annual anthelmintic treatment frequency (3.1 treatments/year) over the whole experimental period than farmletsB(1122 epg, 4.3 treatments/year) or A (1374 epg, 4.7 treatments/year). The main factors influencing WEC were the time since the last anthelmintic treatment, and the anthelmintic used at that treatment. The magnitude of these effects dwarfed those of climatic and management factors that might be expected to influence the epidemiology of gastrointestinal nematode infections via environmental or host-mediated mechanisms. Nevertheless management factors associated with stocking rate and grazed proportion (proportion of each farmlet grazed at any one time), and climatic indicators of both temperature and moisture availability had significant effects on WEC. The results show that, in a region with 'Haemonchus contortus' as the major sheep nematode, improved host nutrition in a higher input system (farmlet A) did not provide more effective control of gastrointestinal nematodes than typical management (farmlet B); however, it was observed that gastrointestinal nematode control was no worse on farmlet A than on farmlet B in spite of farmlet A supporting a 48% higher stocking rate by later in the trial period (2005). The study provided strong support for the proposition that intensive rotational grazing (farmlet C) provides more effective control of gastrointestinal nematodes than typical management (farmlet B) as evidenced by significantly lower WEC counts and anthelmintic treatment frequency. Tactical worm control based on routine monitoring of WEC provided adequate control of worms on all three farmlets for much of the experimental period but failed to prevent significant spikes in WEC to values associated with significant production loss on multiple occasions, and significant ewe mortality on farmlets A and B on one occasion.en
dc.languageenen
dc.publisherCSIRO Publishingen
dc.relation.ispartofAnimal Production Scienceen
dc.titleGrazing systems and worm control in sheep: a long-term case study involving three management systems with analysis of factors influencing faecal worm egg counten
dc.typeJournal Articleen
dc.identifier.doi10.1071/AN13037en
dcterms.accessRightsGolden
dc.subject.keywordsAnimal Protection (Pests and Pathogens)en
dc.subject.keywordsAnimal Managementen
local.contributor.firstnameSteve Wen
local.contributor.firstnameAlisonen
local.contributor.firstnameElizabethen
local.contributor.firstnameMalcolm Ren
local.contributor.firstnameDuncanen
local.contributor.firstnameJim Men
local.subject.for2008070205 Animal Protection (Pests and Pathogens)en
local.subject.for2008070203 Animal Managementen
local.subject.seo2008830311 Sheep - Woolen
local.profile.schoolSchool of Environmental and Rural Scienceen
local.profile.schoolAnimal Scienceen
local.profile.schoolAnimal Scienceen
local.profile.schoolSchool of Environmental and Rural Scienceen
local.profile.emailswalkden@une.edu.auen
local.profile.emailmalcolm.knox@csiro.auen
local.profile.emaildmackay@une.edu.auen
local.output.categoryC1en
local.record.placeauen
local.record.institutionUniversity of New Englanden
local.identifier.epublicationsrecordune-20140115-091619en
local.publisher.placeAustraliaen
local.format.startpage765en
local.format.endpage779en
local.identifier.scopusid84884539948en
local.peerreviewedYesen
local.identifier.volume53en
local.identifier.issue7-8en
local.title.subtitlea long-term case study involving three management systems with analysis of factors influencing faecal worm egg counten
local.access.fulltextYesen
local.contributor.lastnameWalkden-Brownen
local.contributor.lastnameColvinen
local.contributor.lastnameHallen
local.contributor.lastnameKnoxen
local.contributor.lastnameMacKayen
local.contributor.lastnameScotten
dc.identifier.staffune-id:swalkdenen
dc.identifier.staffune-id:dmackayen
local.profile.orcid0000-0002-0638-5533en
local.profile.roleauthoren
local.profile.roleauthoren
local.profile.roleauthoren
local.profile.roleauthoren
local.profile.roleauthoren
local.profile.roleauthoren
local.identifier.unepublicationidune:14565en
local.identifier.handlehttps://hdl.handle.net/1959.11/14350en
dc.identifier.academiclevelAcademicen
dc.identifier.academiclevelAcademicen
local.title.maintitleGrazing systems and worm control in sheepen
local.output.categorydescriptionC1 Refereed Article in a Scholarly Journalen
local.search.authorWalkden-Brown, Steve Wen
local.search.authorColvin, Alisonen
local.search.authorHall, Elizabethen
local.search.authorKnox, Malcolm Ren
local.search.authorMacKay, Duncanen
local.search.authorScott, Jim Men
local.uneassociationUnknownen
local.year.published2013en
local.subject.for2020300304 Animal protection (incl. pests and pathogens)en
local.subject.for2020300302 Animal managementen
local.subject.seo2020100413 Sheep for woolen
Appears in Collections:Journal Article
Files in This Item:
2 files
File Description SizeFormat 
Show simple item record

SCOPUSTM   
Citations

13
checked on Mar 16, 2024

Page view(s)

1,142
checked on Jul 23, 2023
Google Media

Google ScholarTM

Check

Altmetric


Items in Research UNE are protected by copyright, with all rights reserved, unless otherwise indicated.