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<title>UTas ePrints - Inuence of body weight and body condition score at breeding on conception and prolicacy of Merino and Composite Coopworth, East Friesian, Romney and Texel sheep in Tasmania, Australia</title>
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<meta content="Malau-Aduli, A.E.O." name="eprints.creators_name" />
<meta content="Bond, G.H." name="eprints.creators_name" />
<meta content="Dunbabin, M." name="eprints.creators_name" />
<meta content="Aduli.MalauAduli@utas.edu.au" name="eprints.creators_id" />
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<meta content="2008-01-04 01:01:17" name="eprints.datestamp" />
<meta content="2008-01-24T00:04:42Z" name="eprints.lastmod" />
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<meta content="Inuence of body weight and body condition score at
breeding on conception and prolicacy of Merino and Composite
Coopworth, East Friesian, Romney and Texel sheep in Tasmania,
Australia" name="eprints.title" />
<meta content="pub" name="eprints.ispublished" />
<meta content="270207" name="eprints.subjects" />
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<meta content="Conception, Prolicacy, Sheep, Bodyweight" name="eprints.keywords" />
<meta content="We evaluated ewe conception and prolicacy in six ocks on three
sheep farms with similar commercial management conditions in the
Australian State of Tasmania. The aim was to investigate the effects of
BW and BCS at mating, age group, and breed on reproductive traits.
1759 Merino, Composite Merino/Coopworth (M/Coop), Composite
East Friesian/Romney (EF/Rom), and Composite Coopworth/East
Friesian/Texel (Coop/EF/Tex) ewes of maiden (7 mo) and mature
(18 to 30 mo) age groups were evaluated. Body weight and BCS of
ewes were recorded before rams were introduced to the breeding mob.
Ultrasound scanning 90 d after ram removal was carried out. Results
demonstrated that ewes that conceived were consistently of greater BW
and BCS than barren ewes. The average BW of non-pregnant, single,
and multiple-bearing ewes were 41.3, 43.7, and 54.6 kg respectively,
while their corresponding BCS were 2.77, 2.80, and 2.85. However,
highly signicant (P <0.0001) breed, age group, and ock variations
were observed: 7 mo-old maiden ewes had a significantly lower
conception rate than 18 mo-old ewes at the same BW at breeding.
Within the 18-mo age groups, percentages of non-pregnant ewes were
16.7, 3.0, and 2.4% and percentages of multiple fetus-bearing ewes
were 1.4, 53.6, and 74.2% for Merino, Coop/EF/Tex, and M/Coop,
respectively. The Coop/EF/Tex ocks were consistently more prolic
than other breeds with 74.2, and 77.5% of ewes scanned as multiple
fetus-carrying at ages 18 and 30 mo, respectively. Above BW of
approximately 55 kg, the probability of multiple conceptions began to
increase at a greater rate at the expense of single conceptions. The study
shows that nutritional management prior to joining in commercial
Tasmanian sheep ocks has the potential to increase reproductive
performance in ewes. This is of particular importance when ewes
are bred as lambs or from breeds with characteristically low fertility
levels" name="eprints.abstract" />
<meta content="2007-07-08" name="eprints.date" />
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<meta content="Journal of Animal Science" name="eprints.publication" />
<meta content="85" name="eprints.volume" />
<meta content="Suppl 1" name="eprints.number" />
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<meta content="Malau-Aduli, A.E.O. and Bond, G.H. and Dunbabin, M. (2007) Inuence of body weight and body condition score at breeding on conception and prolicacy of Merino and Composite Coopworth, East Friesian, Romney and Texel sheep in Tasmania, Australia. Journal of Animal Science, 85 (Suppl 1). 663. ISSN 1525-3163" name="eprints.citation" />
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<meta content="Inuence of body weight and body condition score at
breeding on conception and prolicacy of Merino and Composite
Coopworth, East Friesian, Romney and Texel sheep in Tasmania,
Australia" name="DC.title" />
<meta content="Malau-Aduli, A.E.O." name="DC.creator" />
<meta content="Bond, G.H." name="DC.creator" />
<meta content="Dunbabin, M." name="DC.creator" />
<meta content="270207 Quantitative Genetics" name="DC.subject" />
<meta content="300401 Animal Breeding" name="DC.subject" />
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<meta content="We evaluated ewe conception and prolicacy in six ocks on three
sheep farms with similar commercial management conditions in the
Australian State of Tasmania. The aim was to investigate the effects of
BW and BCS at mating, age group, and breed on reproductive traits.
1759 Merino, Composite Merino/Coopworth (M/Coop), Composite
East Friesian/Romney (EF/Rom), and Composite Coopworth/East
Friesian/Texel (Coop/EF/Tex) ewes of maiden (7 mo) and mature
(18 to 30 mo) age groups were evaluated. Body weight and BCS of
ewes were recorded before rams were introduced to the breeding mob.
Ultrasound scanning 90 d after ram removal was carried out. Results
demonstrated that ewes that conceived were consistently of greater BW
and BCS than barren ewes. The average BW of non-pregnant, single,
and multiple-bearing ewes were 41.3, 43.7, and 54.6 kg respectively,
while their corresponding BCS were 2.77, 2.80, and 2.85. However,
highly signicant (P <0.0001) breed, age group, and ock variations
were observed: 7 mo-old maiden ewes had a significantly lower
conception rate than 18 mo-old ewes at the same BW at breeding.
Within the 18-mo age groups, percentages of non-pregnant ewes were
16.7, 3.0, and 2.4% and percentages of multiple fetus-bearing ewes
were 1.4, 53.6, and 74.2% for Merino, Coop/EF/Tex, and M/Coop,
respectively. The Coop/EF/Tex ocks were consistently more prolic
than other breeds with 74.2, and 77.5% of ewes scanned as multiple
fetus-carrying at ages 18 and 30 mo, respectively. Above BW of
approximately 55 kg, the probability of multiple conceptions began to
increase at a greater rate at the expense of single conceptions. The study
shows that nutritional management prior to joining in commercial
Tasmanian sheep ocks has the potential to increase reproductive
performance in ewes. This is of particular importance when ewes
are bred as lambs or from breeds with characteristically low fertility
levels" name="DC.description" />
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<h1 class="ep_tm_pagetitle">Inuence of body weight and body condition score at breeding on conception and prolicacy of Merino and Composite Coopworth, East Friesian, Romney and Texel sheep in Tasmania, Australia</h1>
<p style="margin-bottom: 1em" class="not_ep_block"><span class="person_name">Malau-Aduli, A.E.O.</span> and <span class="person_name">Bond, G.H.</span> and <span class="person_name">Dunbabin, M.</span> (2007) <xhtml:em>Inuence of body weight and body condition score at breeding on conception and prolicacy of Merino and Composite Coopworth, East Friesian, Romney and Texel sheep in Tasmania, Australia.</xhtml:em> Journal of Animal Science, 85 (Suppl 1). 663. ISSN 1525-3163</p><p style="margin-bottom: 1em" class="not_ep_block"></p><table style="margin-bottom: 1em" class="not_ep_block"><tr><td valign="top" style="text-align:center"><a onmouseover="EPJS_ShowPreview( event, 'doc_preview_3709' );" onmouseout="EPJS_HidePreview( event, 'doc_preview_3709' );" href="http://eprints.utas.edu.au/2801/1/Malau-Aduli_et_al_2007_JAnimSci85Suppl1Sheep.pdf"><img alt="[img]" src="http://eprints.utas.edu.au/style/images/fileicons/application_pdf.png" border="0" class="ep_doc_icon" /></a><div class="ep_preview" id="doc_preview_3709"><table><tr><td><img alt="" src="http://eprints.utas.edu.au/2801/thumbnails/1/preview.png" border="0" class="ep_preview_image" /><div class="ep_preview_title">Preview</div></td></tr></table></div></td><td valign="top"><a href="http://eprints.utas.edu.au/2801/1/Malau-Aduli_et_al_2007_JAnimSci85Suppl1Sheep.pdf"><span class="ep_document_citation">PDF</span></a> - Requires a PDF viewer<br />542Kb</td></tr></table><p style="margin-bottom: 1em" class="not_ep_block">Official URL: <a href="http://jas.fass.org/">http://jas.fass.org/</a></p><div class="not_ep_block"><h2>Abstract</h2><p style="padding-bottom: 16px; text-align: left; margin: 1em auto 0em auto">We evaluated ewe conception and prolicacy in six ocks on three
sheep farms with similar commercial management conditions in the
Australian State of Tasmania. The aim was to investigate the effects of
BW and BCS at mating, age group, and breed on reproductive traits.
1759 Merino, Composite Merino/Coopworth (M/Coop), Composite
East Friesian/Romney (EF/Rom), and Composite Coopworth/East
Friesian/Texel (Coop/EF/Tex) ewes of maiden (7 mo) and mature
(18 to 30 mo) age groups were evaluated. Body weight and BCS of
ewes were recorded before rams were introduced to the breeding mob.
Ultrasound scanning 90 d after ram removal was carried out. Results
demonstrated that ewes that conceived were consistently of greater BW
and BCS than barren ewes. The average BW of non-pregnant, single,
and multiple-bearing ewes were 41.3, 43.7, and 54.6 kg respectively,
while their corresponding BCS were 2.77, 2.80, and 2.85. However,
highly signicant (P <0.0001) breed, age group, and ock variations
were observed: 7 mo-old maiden ewes had a significantly lower
conception rate than 18 mo-old ewes at the same BW at breeding.
Within the 18-mo age groups, percentages of non-pregnant ewes were
16.7, 3.0, and 2.4% and percentages of multiple fetus-bearing ewes
were 1.4, 53.6, and 74.2% for Merino, Coop/EF/Tex, and M/Coop,
respectively. The Coop/EF/Tex ocks were consistently more prolic
than other breeds with 74.2, and 77.5% of ewes scanned as multiple
fetus-carrying at ages 18 and 30 mo, respectively. Above BW of
approximately 55 kg, the probability of multiple conceptions began to
increase at a greater rate at the expense of single conceptions. The study
shows that nutritional management prior to joining in commercial
Tasmanian sheep ocks has the potential to increase reproductive
performance in ewes. This is of particular importance when ewes
are bred as lambs or from breeds with characteristically low fertility
levels</p></div><table style="margin-bottom: 1em" border="0" cellpadding="3" class="not_ep_block"><tr><th valign="top" class="ep_row">Item Type:</th><td valign="top" class="ep_row">Article</td></tr><tr><th valign="top" class="ep_row">Keywords:</th><td valign="top" class="ep_row">Conception, Prolicacy, Sheep, Bodyweight</td></tr><tr><th valign="top" class="ep_row">Subjects:</th><td valign="top" class="ep_row"><a href="http://eprints.utas.edu.au/view/subjects/270207.html">270000 Biological Sciences > 270200 Genetics > 270207 Quantitative Genetics</a><br /><a href="http://eprints.utas.edu.au/view/subjects/300401.html">300000 Agricultural, Veterinary and Environmental Sciences > 300400 Animal Production > 300401 Animal Breeding</a><br /><a href="http://eprints.utas.edu.au/view/subjects/300402.html">300000 Agricultural, Veterinary and Environmental Sciences > 300400 Animal Production > 300402 Animal Reproduction</a></td></tr><tr><th valign="top" class="ep_row">Collections:</th><td valign="top" class="ep_row">UNSPECIFIED</td></tr><tr><th valign="top" class="ep_row">ID Code:</th><td valign="top" class="ep_row">2801</td></tr><tr><th valign="top" class="ep_row">Deposited By:</th><td valign="top" class="ep_row"><span class="ep_name_citation"><span class="person_name">Dr Aduli E.O. Malau-Aduli</span></span></td></tr><tr><th valign="top" class="ep_row">Deposited On:</th><td valign="top" class="ep_row">04 Jan 2008 12:01</td></tr><tr><th valign="top" class="ep_row">Last Modified:</th><td valign="top" class="ep_row">24 Jan 2008 11:04</td></tr><tr><th valign="top" class="ep_row">ePrint Statistics:</th><td valign="top" class="ep_row"><a target="ePrintStats" href="/es/index.php?action=show_detail_eprint;id=2801;">View statistics for this ePrint</a></td></tr></table><p align="right">Repository Staff Only: <a href="http://eprints.utas.edu.au/cgi/users/home?screen=EPrint::View&eprintid=2801">item control page</a></p>
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