The Effect of Age of Dam and Birth Rank on the Reproductive Performance of Ewes as One- and Two-Year-Olds.

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dc.citation.issue3
dc.citation.volume11
dc.contributor.authorPettigrew E
dc.contributor.authorHickson R
dc.contributor.authorMorris S
dc.contributor.authorKenyon P
dc.contributor.authorCorner-Thomas R
dc.contributor.authorHaslin E
dc.contributor.authorBlair H
dc.date.available2021-03
dc.date.available2021-03-08
dc.date.issued2021-03-10
dc.description.abstractCurrently, 30-43% of New Zealand sheep farmers breed their ewe lambs, but few retain the offspring as replacements for their flock. No difference in lamb production as a yearling among singletons and twins born to ewe lambs and twins born to mature ewes has been reported, provided the ewe lambs had reached the 60-65% of their likely mature weight prior to breeding at seven to eight months of age. The aim of this experiment was to determine the lamb production from singletons and twins born to ewe lambs and twins born to mature ewes during their first two years of lambing. The experiment included 8-month-old ewes born as twins to mature ewes (M2, n = 135), singletons born to ewe lambs (L1, n = 135), and twins born to ewe lambs (L2, n = 88), bred during the same period to the same rams, over two years. The efficiency of lamb production (total litter weight at weaning divided by the pre-breeding weight of the ewe, for all ewes presented for breeding) after two years of production was not significantly different (p > 0.05) among the groups (0.40 ± 0.02, 0.39 ± 0.02, and 0.39 ± 0.03, for M2, L1, and L2, respectively).
dc.description.publication-statusPublished
dc.identifierhttp://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000633169100001&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=c5bb3b2499afac691c2e3c1a83ef6fef
dc.identifierARTN 770
dc.identifier.citationANIMALS, 2021, 11 (3)
dc.identifier.doi10.3390/ani11030770
dc.identifier.elements-id441554
dc.identifier.harvestedMassey_Dark
dc.identifier.issn2076-2615
dc.relation.isPartOfANIMALS
dc.rights© 2021 by the authors CC BY 4.0
dc.subjectewe lamb
dc.subjectbreeding
dc.subjectreproduction
dc.subjectmature ewe
dc.subjectdam age
dc.subjectbirth rank
dc.subject.anzsrc0502 Environmental Science and Management
dc.subject.anzsrc0608 Zoology
dc.subject.anzsrc0702 Animal Production
dc.titleThe Effect of Age of Dam and Birth Rank on the Reproductive Performance of Ewes as One- and Two-Year-Olds.
dc.typeJournal article
pubs.notesNot known
pubs.organisational-group/Massey University
pubs.organisational-group/Massey University/College of Sciences
pubs.organisational-group/Massey University/College of Sciences/School of Agriculture & Environment
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