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Registro completo
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Biblioteca (s) : |
INIA Tacuarembó. |
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Fecha : |
09/11/2015 |
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Actualizado : |
09/11/2015 |
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Autor : |
MUIR, P.D.; THOMSON, B.C. |
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Afiliación : |
P.D. MUIR; B.C. THOMSON. |
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Título : |
Lamb Survival (03 OFR01): Final Report. |
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Fecha de publicación : |
2009 |
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Fuente / Imprenta : |
Meat & Wool New Zealand, 2009. |
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Páginas : |
15 p. |
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Idioma : |
Español |
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Notas : |
Projec: Survival and performance of multiple lambs (03OFR01). |
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Contenido : |
Historically, lamb survival rates at the Poukawa Research Station are high in singles and twins (90% and 88% respectively), falling to 77% in triplets. A large number of factors appear to influence triplet lamb survival ? including weather, ewe genotype, litter size, lamb birth weight, ewe behaviour, ewe age, ewe nutrition, ewe health, ewe colostrum and milk production, mineral status, stress and uterine environment. However, perhaps the biggest contributor to lamb mortality is the stress the ewe is under prior to lambing. Ewes that had higher beta-hydroxy butyrate (BOH) levels prior to lambing had more dead lambs at birth and this suggests a poorer uterine environment. Lambs that died of starvation also appeared to be born to ewes with higher BOH levels. Lambs that died around or soon after birth tended to be smaller and were probably less vigorous, had limited nutrition in utero, were more vulnerable to adverse weather and less competitive for the ewe?s milk in a multiple feeding situation Transferring scanned triplet ewes from an extensive property to an intensive property for lambing significantly improved lamb survival (extensive 171% lambing vs intensive 222% lambing) and also reduced ewe mortality (9% vs 4%). Ewes under intensive management weaned 58.2 kg lamb/ewe whereas the triplet ewes left on the extensive property weaned to 47.4 kg lamb/ewe. There is the opportunity to transfer a problem mob (i.e. the scanned triplet ewes) from extensive hill country, to more intensive downland properties for lambing. Ewes would be returned after weaning and returns from lambs split between the two properties.
Lamb survival can be improved by rearing orphan and at-risk lambs using the principles of the once-a-day feeding of calves. Lambs can be successfully weaned at 8 kg ? at or around 4 weeks of age. Best results were achieved using cow colostrum. The biggest animal health issue was abomasal bloat and this was overcome by adding yoghurt to the colostrum/milk. Another issue encountered was lack of palatability of meal. It appears that products such as palm kernel (often incorporated into calf pellets), is unpalatable making early weaning difficult. Best results were obtained with a meal based on maize and peas. Under good feeding conditions (colostrum and high quality meal) lambs can be reared for $24 (labour and facilities excluded) and achieve liveweights of 26.7 kg at 15 weeks of age. . Two lifetime performance studies were initiated as part of this project - the effect of hogget lambing and the effect of birth rank on lifetime performance. Both projects are only part
way through but early indications are that ewes lambed as hoggets produce more total lamb weaning weight. However, the gap is closing with each successive lambing by the ewes first lambed as two tooths. Ewes born as twins or triplets are maintaining a slight advantage over ewes lambed as singles in terms of lifetime lambs born and total lamb weaning weight/ewe. The historical data collected within the Elite Lamb and Lamb Survival projects has been incorporated into a sheep flock model to test the impact of different management strategies. The biggest impacts came from strategies which enabled more output from fewer ewes.
Lambing hoggets had the biggest impact on flock efficiency and increased gross farm income by 14.6%. Delaying culling from 5 to 6 years meant less replacements were needed 4 and gross farm income increased by 6.2% Lifting scanning % from 160% to 180% lifted gross farm incomes by 5.4%. The cumulative effect of these strategies has the potential to lift gross farm income by 22%. MenosHistorically, lamb survival rates at the Poukawa Research Station are high in singles and twins (90% and 88% respectively), falling to 77% in triplets. A large number of factors appear to influence triplet lamb survival ? including weather, ewe genotype, litter size, lamb birth weight, ewe behaviour, ewe age, ewe nutrition, ewe health, ewe colostrum and milk production, mineral status, stress and uterine environment. However, perhaps the biggest contributor to lamb mortality is the stress the ewe is under prior to lambing. Ewes that had higher beta-hydroxy butyrate (BOH) levels prior to lambing had more dead lambs at birth and this suggests a poorer uterine environment. Lambs that died of starvation also appeared to be born to ewes with higher BOH levels. Lambs that died around or soon after birth tended to be smaller and were probably less vigorous, had limited nutrition in utero, were more vulnerable to adverse weather and less competitive for the ewe?s milk in a multiple feeding situation Transferring scanned triplet ewes from an extensive property to an intensive property for lambing significantly improved lamb survival (extensive 171% lambing vs intensive 222% lambing) and also reduced ewe mortality (9% vs 4%). Ewes under intensive management weaned 58.2 kg lamb/ewe whereas the triplet ewes left on the extensive property weaned to 47.4 kg lamb/ewe. There is the opportunity to transfer a problem mob (i.e. the scanned triplet ewes) from extensive hill country, to more int... Presentar Todo |
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Palabras claves : |
RAZAS PROLÍFICAS. |
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Thesagro : |
CORDERO; OVINOS. |
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Asunto categoría : |
-- |
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Marc : |
LEADER 04124nam a2200181 a 4500
001 1053810
005 2015-11-09
008 2009 bl uuuu u00u1 u #d
100 1 $aMUIR, P.D.
245 $aLamb Survival (03 OFR01)$bFinal Report.$h[electronic resource]
260 $aMeat & Wool New Zealand$c2009
300 $a15 p.
500 $aProjec: Survival and performance of multiple lambs (03OFR01).
520 $aHistorically, lamb survival rates at the Poukawa Research Station are high in singles and twins (90% and 88% respectively), falling to 77% in triplets. A large number of factors appear to influence triplet lamb survival ? including weather, ewe genotype, litter size, lamb birth weight, ewe behaviour, ewe age, ewe nutrition, ewe health, ewe colostrum and milk production, mineral status, stress and uterine environment. However, perhaps the biggest contributor to lamb mortality is the stress the ewe is under prior to lambing. Ewes that had higher beta-hydroxy butyrate (BOH) levels prior to lambing had more dead lambs at birth and this suggests a poorer uterine environment. Lambs that died of starvation also appeared to be born to ewes with higher BOH levels. Lambs that died around or soon after birth tended to be smaller and were probably less vigorous, had limited nutrition in utero, were more vulnerable to adverse weather and less competitive for the ewe?s milk in a multiple feeding situation Transferring scanned triplet ewes from an extensive property to an intensive property for lambing significantly improved lamb survival (extensive 171% lambing vs intensive 222% lambing) and also reduced ewe mortality (9% vs 4%). Ewes under intensive management weaned 58.2 kg lamb/ewe whereas the triplet ewes left on the extensive property weaned to 47.4 kg lamb/ewe. There is the opportunity to transfer a problem mob (i.e. the scanned triplet ewes) from extensive hill country, to more intensive downland properties for lambing. Ewes would be returned after weaning and returns from lambs split between the two properties. Lamb survival can be improved by rearing orphan and at-risk lambs using the principles of the once-a-day feeding of calves. Lambs can be successfully weaned at 8 kg ? at or around 4 weeks of age. Best results were achieved using cow colostrum. The biggest animal health issue was abomasal bloat and this was overcome by adding yoghurt to the colostrum/milk. Another issue encountered was lack of palatability of meal. It appears that products such as palm kernel (often incorporated into calf pellets), is unpalatable making early weaning difficult. Best results were obtained with a meal based on maize and peas. Under good feeding conditions (colostrum and high quality meal) lambs can be reared for $24 (labour and facilities excluded) and achieve liveweights of 26.7 kg at 15 weeks of age. . Two lifetime performance studies were initiated as part of this project - the effect of hogget lambing and the effect of birth rank on lifetime performance. Both projects are only part way through but early indications are that ewes lambed as hoggets produce more total lamb weaning weight. However, the gap is closing with each successive lambing by the ewes first lambed as two tooths. Ewes born as twins or triplets are maintaining a slight advantage over ewes lambed as singles in terms of lifetime lambs born and total lamb weaning weight/ewe. The historical data collected within the Elite Lamb and Lamb Survival projects has been incorporated into a sheep flock model to test the impact of different management strategies. The biggest impacts came from strategies which enabled more output from fewer ewes. Lambing hoggets had the biggest impact on flock efficiency and increased gross farm income by 14.6%. Delaying culling from 5 to 6 years meant less replacements were needed 4 and gross farm income increased by 6.2% Lifting scanning % from 160% to 180% lifted gross farm incomes by 5.4%. The cumulative effect of these strategies has the potential to lift gross farm income by 22%.
650 $aCORDERO
650 $aOVINOS
653 $aRAZAS PROLÍFICAS
700 1 $aTHOMSON, B.C.
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Registro original : |
INIA Tacuarembó (TBO) |
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