Does phenotypic selection for fleece weight reduce lamb survival?

Peter Gordon Refshauge; S Hatcher; Geoffrey Hinch; D L Hopkins; S Nieslen

Does phenotypic selection for fleece weight reduce lamb survival?

Peter Gordon Refshauge, S Hatcher, Geoffrey Hinch, D L Hopkins, S Nieslen

School of Environmental & Rural Science

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

Abstract

A two year field experiment studied the impact of phenotypic selection for clean fleece weight (CFW) on 'whole ewe' performance using highly fecund medium wool Merinos stocked at either 10 or 15dse/ha. 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 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. CFW phenotype did not affect fat score at mid-pregnancy or post-natal mortality (P = 0.059).

Original language	English
Title of host publication	Proceedings Association for the Advancement of Animal Breeding and Genetics
Editors	AAABG: Association for the Advancement of Animal Breeding, Genetics
Place of Publication	Armidale, Australia
Publisher	Association for the Advancement of Animal Breeding and Genetics (AAABG)
Pages	561-564
Volume	17
ISBN (Print)	1921208139
Publication status	Published - 2007
Event	AAABG 2007: 17th Conference of the Association for the Advancement of Animal Breeding and Genetics - University of New England, Armidale, Australia Duration: 23 Sept 2007 → 26 Sept 2007

Conference

Conference	AAABG 2007: 17th Conference of the Association for the Advancement of Animal Breeding and Genetics
City	Armidale, Australia
Period	23/09/07 → 26/09/07

Keywords

Animal Breeding

Access to Document

https://hdl.handle.net/1959.11/4102

Handle.net

Persistent link

Cite this

Refshauge, P. G., Hatcher, S., Hinch, G., Hopkins, D. L., & Nieslen, S. (2007). Does phenotypic selection for fleece weight reduce lamb survival? In AAABG. Association for the Advancement of Animal Breeding, & Genetics (Eds.), Proceedings Association for the Advancement of Animal Breeding and Genetics (Vol. 17, pp. 561-564). Association for the Advancement of Animal Breeding and Genetics (AAABG). https://hdl.handle.net/1959.11/4102

Refshauge, Peter Gordon ; Hatcher, S ; Hinch, Geoffrey et al. / Does phenotypic selection for fleece weight reduce lamb survival?. Proceedings Association for the Advancement of Animal Breeding and Genetics. editor / AAABG: Association for the Advancement of Animal Breeding ; Genetics. Vol. 17 Armidale, Australia : Association for the Advancement of Animal Breeding and Genetics (AAABG), 2007. pp. 561-564

@inproceedings{004fdd1cc30f4ebda0f1c0dffa624453,

title = "Does phenotypic selection for fleece weight reduce lamb survival?",

abstract = "A two year field experiment studied the impact of phenotypic selection for clean fleece weight (CFW) on 'whole ewe' performance using highly fecund medium wool Merinos stocked at either 10 or 15dse/ha. 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 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. CFW phenotype did not affect fat score at mid-pregnancy or post-natal mortality (P = 0.059).",

keywords = "Animal Breeding",

author = "Refshauge, \{Peter Gordon\} and S Hatcher and Geoffrey Hinch and Hopkins, \{D L\} and S Nieslen",

year = "2007",

language = "English",

isbn = "1921208139",

volume = "17",

pages = "561--564",

editor = "\{Association for the Advancement of Animal Breeding\}, AAABG: and Genetics",

booktitle = "Proceedings Association for the Advancement of Animal Breeding and Genetics",

publisher = "Association for the Advancement of Animal Breeding and Genetics (AAABG)",

note = "AAABG 2007: 17th Conference of the Association for the Advancement of Animal Breeding and Genetics ; Conference date: 23-09-2007 Through 26-09-2007",

}

Refshauge, PG, Hatcher, S, Hinch, G, Hopkins, DL & Nieslen, S 2007, Does phenotypic selection for fleece weight reduce lamb survival? in AAABG Association for the Advancement of Animal Breeding & Genetics (eds), Proceedings Association for the Advancement of Animal Breeding and Genetics. vol. 17, Association for the Advancement of Animal Breeding and Genetics (AAABG), Armidale, Australia, pp. 561-564, AAABG 2007: 17th Conference of the Association for the Advancement of Animal Breeding and Genetics, Armidale, Australia, 23/09/07. <https://hdl.handle.net/1959.11/4102>

Does phenotypic selection for fleece weight reduce lamb survival? / Refshauge, Peter Gordon; Hatcher, S; Hinch, Geoffrey et al.
Proceedings Association for the Advancement of Animal Breeding and Genetics. ed. / AAABG: Association for the Advancement of Animal Breeding; Genetics. Vol. 17 Armidale, Australia: Association for the Advancement of Animal Breeding and Genetics (AAABG), 2007. p. 561-564.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review