Does phenotypic selection for fleece weight reduce lamb survival?

PG Refshauge, S Hatcher, G Hinch, DL Hopkins, SG Nielsen

    Research output: Book chapter/Published conference paperConference paperpeer-review

    Abstract

    A two year field experiment studied the impact of phenotypic selection for clean fleece weight on whole ewe performance. The ewes were managed at a high or low stocking rate during gestation and from marking to weaning. Post-mortem autopsy was undertaken on all lambs found dead (25%) during lambing in each year. Of those lambs with stomachs present for post-mortem, 92% had not fed. Birthweight and birth type significantly affected post-natal mortality and dystocia (slow or difficult labour or delivery) was responsible for 61% of all deaths. Fat score at mid-pregnancy was significantly and positively associated with post-natal mortality. Fat score in late pregnancy had a significant negative relationship with birthweight. Clean fleece weight did not affect fat score at mid-pregnancy or post-natal mortality (P = 0.059).
    Original languageEnglish
    Title of host publicationGenetic Improvement
    Subtitle of host publicationMaking it Happen
    Place of PublicationAustralia
    PublisherDPI/University of New England
    Pages561564
    Number of pages1
    ISBN (Electronic)1921208139
    Publication statusPublished - 2007
    Event17th Conference of the Association for the Advancement of Animal Breeding & Genetics - Armidale, NSW, Australia
    Duration: 24 Sep 200726 Sep 2007

    Conference

    Conference17th Conference of the Association for the Advancement of Animal Breeding & Genetics
    Country/TerritoryAustralia
    Period24/09/0726/09/07

    Fingerprint

    Dive into the research topics of 'Does phenotypic selection for fleece weight reduce lamb survival?'. Together they form a unique fingerprint.

    Cite this