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dc.contributor.authorFields, R. L.en
dc.contributor.authorBarrell, Graham K.en
dc.contributor.authorMoot, Derrick J.en
dc.date.accessioned2018-04-27T02:12:33Z
dc.date.issued2016en
dc.identifier.citationFields, R.L., Barrell, G.K., & Moot, D.K. (2016). Premature mammary development in ewe lambs exposed to an oestrogenic lucerne pasture. Journal of New Zealand Grasslands, 78, 41-44.en
dc.identifier.issn2463-2872en
dc.identifier.urihttps://hdl.handle.net/10182/9280
dc.description.abstractA report of mammary development in 6-month-old ewe lambs grazing lucerne on a commercial farm in North Otago provided an opportunity to investigate the possibility to use this as a tool to detect oestrogenic lucerne pastures. Of the 36 ewe lambs grazing lucerne at this farm, protruding mammary glands were visible in 19. In contrast, none of the 22 ewe lambs grazing grass had protruding mammary glands. The lucerne-fed ewe lambs also had larger mean teat width than the grassfed ewe lambs (17.9 ± 0.53 mm versus 13.4 ± 0.78 mm respectively. The lucerne-fed animals were returned to grass pasture 4 weeks before the introduction of rams.There was no effect of the earlier 16 weeks of lucerne grazing on the number of fetuses present in ewes near mid-gestation compared with ewes on grass throughout this period. These findings from a commercial farm suggest that oestrogenic lucerne may be detected by monitoring ewe lambs for mammary development. This would enable farmers to manage pre-mating grazing of ewes with minimal risk of lowered ovulation rates.en
dc.format.extent41-44en
dc.language.isoenen
dc.publisherNZ Grassland Associationen
dc.relationThe original publication is available from - NZ Grassland Association - https://www.grassland.org.nz/publications/nzgrassland_publication_2811.pdfen
dc.rights© NZ Grasslands Association . © The Authorsen
dc.subjectsheepen
dc.subjectcoumestrolen
dc.subjectoestrogenen
dc.subjectfecundityen
dc.subjectMedicago sativaen
dc.subjectalfalfaen
dc.titlePremature mammary development in ewe lambs exposed to an oestrogenic lucerne pastureen
dc.typeJournal Article
lu.contributor.unitLincoln Universityen
lu.contributor.unitFaculty of Agriculture and Life Sciencesen
lu.contributor.unitDepartment of Agricultural Sciencesen
lu.contributor.unitResearch Management Officeen
lu.contributor.unit/LU/Research Management Office/2018 PBRF Staff groupen
dc.subject.anzsrc0701 Agriculture, Land and Farm Managementen
dc.subject.anzsrc070204 Animal Nutritionen
dc.subject.anzsrc0703 Crop and Pasture Productionen
dc.relation.isPartOfJournal of New Zealand Grasslandsen
pubs.noteshttps://www.grassland.org.nz/viewpublication.php?pubID=399en
pubs.organisational-group/LU
pubs.organisational-group/LU/Agriculture and Life Sciences
pubs.organisational-group/LU/Agriculture and Life Sciences/AGSC
pubs.organisational-group/LU/Research Management Office
pubs.organisational-group/LU/Research Management Office/2018 PBRF Staff group
pubs.publication-statusPublisheden
pubs.publisher-urlhttps://www.grassland.org.nz/publications/nzgrassland_publication_2811.pdfen
pubs.volume78en
dc.identifier.eissn2463-2880en
lu.identifier.orcid0000-0001-7644-6816


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