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Dan Morrical |
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Iowa State University |
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Ames IA |
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Drop rate |
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Mature ewes 1.6 1.9 2.2 2.5 |
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Ewe lambs 1.1 1.4 1.7 2.0 |
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Whole flock 1.5 1.8 2.1 2.4 |
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assumes 20% ewe lambs |
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Well grown, 70% of mature wt. |
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Breed separate |
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Expect them to settle |
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Cull opens |
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Continue on G/D ration |
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Ewe Ewe |
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Mature Lamb WDA |
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Size Goal B-B |
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150 105 .5 |
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175 131 .63 |
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200 140 .67 |
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225 158 .75 |
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Ad libitum from weaning to 50% of target (200 pound mature =100) |
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2/3rds concentrate 1/3rd good roughage 100
pounds through breeding |
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Example: 1.2 hay & |
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2.4 corn:protein mix |
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gain expected .55 |
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90% conception rate in ewe lambs |
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utilize ultrasound fetal scanning |
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cull opens early |
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why |
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Most do not |
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I suggest one do |
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Must be kept in positive energy balance |
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Teasers and Reproduction |
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Purdue |
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Teaser Fence Cont. |
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%cycling 91
81 78 |
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Conc. Rate 84
79 81 |
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Drop rate 1.49 1.48
1.47 |
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Mature ewes 1.92 1.80
2.07 |
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Lambing date 30 31
37 |
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Month dependent |
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Genetic dependent |
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Isolation distance |
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Critical for ewe lambs |
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Non-seasonal genetics |
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hair sheep, Romanov, Finn ect. |
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high libido rams |
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use with single sire groups |
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precautions |
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Ewe lamb management |
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Montana |
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bred w/ bred |
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Mature drylot |
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Start weight 83 85 |
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End weight
84 99 |
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Conception Rate % 00 74 |
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Poorer lifetime production |
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Higher salvage value |
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yearling vs market lamb price |
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Weight gains of .25 -.40 per day |
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120 pound ewes |
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2 hay and 2 corn protein mix |
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gain of .32 |
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Weight gains of .15 -.25 per day |
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130 pound ewes |
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2 hay and 2 corn protein mix |
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gain of .2 |
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Concerns ad libitum hay |
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Ewe lambs lose lots of weight |
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especially those rearing twins |
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Some time before their second |
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breeding must recover |
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Slow to milk, counting ability |
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When to start breeding |
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How long to breed for |
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Flushing ? |
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Ewe lambs |
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Ram to ewe ratios |
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