Effect of Breeding Heavier Romney Ewe Lambs at Seven Months of Age on Lamb Production and Efficiency over Their First Three Breeding Seasons

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dc.citation.issue12
dc.citation.volume11
dc.contributor.authorHaslin E
dc.contributor.authorCorner-Thomas RA
dc.contributor.authorKenyon PR
dc.contributor.authorPettigrew EJ
dc.contributor.authorHickson RE
dc.contributor.authorMorris ST
dc.contributor.authorBlair HT
dc.coverage.spatialSwitzerland
dc.date.accessioned2024-01-04T01:42:30Z
dc.date.accessioned2024-07-25T06:37:33Z
dc.date.available2021-12-07
dc.date.available2024-01-04T01:42:30Z
dc.date.available2024-07-25T06:37:33Z
dc.date.issued2021-12-07
dc.description.abstractThis experiment examined the effect of breeding heavier ewe lambs on lamb production and their efficiency over their first three breeding seasons. Two groups of ewe lambs were bred at seven months of age at an average pre-breeding live weight of either 47.9 ± 0.36 kg (heavy; n = 135) or 44.9 ± 0.49 kg (control; n = 135). Ewe live weight, number of lambs born and weaned, and lamb live weight were recorded until 39 months of age, and efficiency was calculated for each ewe. Although the number and lamb weaning weight did not differ between treatments over three years, when data were pooled, heavier ewe lambs at breeding weaned a greater number of lambs over the three-year period. The total lamb weaning weight over the three-year period increased by 2% for each additional kilogram at ewe lamb breeding. Breeding heavier ewe lambs had no effect on efficiency. These results suggest that although breeding heavier ewe lambs had a positive effect on lamb production over the three-year period, it had no effect on efficiency. Before final recommendations can be made, lifetime performance and longevity to five years of age of heavier ewe lambs at breeding are required.
dc.format.pagination3486-
dc.identifier.author-urlhttps://www.ncbi.nlm.nih.gov/pubmed/34944262
dc.identifier.citationHaslin E, Corner-Thomas RA, Kenyon PR, Pettigrew EJ, Hickson RE, Morris ST, Blair HT. (2021). Effect of Breeding Heavier Romney Ewe Lambs at Seven Months of Age on Lamb Production and Efficiency over Their First Three Breeding Seasons.. Animals (Basel). 11. 12. (pp. 3486-).
dc.identifier.doi10.3390/ani11123486
dc.identifier.eissn2076-2615
dc.identifier.elements-typejournal-article
dc.identifier.issn2076-2615
dc.identifier.numberARTN 3486
dc.identifier.piiani11123486
dc.identifier.urihttps://mro.massey.ac.nz/handle/10179/70570
dc.languageeng
dc.publisherMDPI (Basel, Switzerland)
dc.relation.isPartOfAnimals (Basel)
dc.rights(c) 2021 The Author/s
dc.rightsCC BY 4.0
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.subjectenergy requirements
dc.subjectfeed efficiency
dc.subjectpredicted pasture intake
dc.subjecttotal lamb weaning weight
dc.titleEffect of Breeding Heavier Romney Ewe Lambs at Seven Months of Age on Lamb Production and Efficiency over Their First Three Breeding Seasons
dc.typeJournal article
pubs.elements-id450047
pubs.organisational-groupOther
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