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Registro Completo |
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Biblioteca(s): |
Embrapa Caprinos e Ovinos. |
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Data corrente: |
03/09/2007 |
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Data da última atualização: |
03/05/2023 |
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Autoria: |
XU, Z. Z.; McDONALD, M. F.; McCUTCHEON, S. N.; BLAIR, H. T. |
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Título: |
Testis size and endocrine parameters in rams as predictors of aseasonality in their daughters. |
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Ano de publicação: |
1992 |
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Fonte/Imprenta: |
Proceedings of the New Zealand Society of animal Production, v. 52, p. 195-198, 1992. |
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Idioma: |
Inglês |
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Conteúdo: |
Abstract: Overseas data suggest that feeding low energy/high protein diets can increase carcass weight (and muscle mass) while reducing fat content. The potential application of this technique to maximise the returns from overfat lambs in New Zealand was studied. One hundred and sixty ewe lambs, assessed as being overfat, were allocated on a liveweight basis to one of seven treatment groups. These comprised an initial slaughter group, 2 groups offered pasture at approximately maintenance allowance, 2 groups offered pasture at approximately half maintenance plus 200g/d of a high protein pellet and 2 groups held on a bare paddock and offered ad lib straw plus 200g/d of a high protein pellet. One group from each treatment was slaughtered after 3 weeks and the second after 5 weeks of controlled feeding. Liveweight change, carcass weight and carcass fatness were monitored. All groups lost liveweight (88-195 g/d) and estimated carcass weight (37-89g/d) over the experiment. Corrected to a common carcass weight of 15.25kg decreased GR from 11.6mm for the initial slaughter group to 9.7 and 9.2mm after 3 and 5 weeks, respectively of maintenance pasture feeding. Corresponding GR's of the supplemented groups were 9.3mm (both groups) after 3 weeks and 8.1 and 7.5mm after 5 weeks for straw and pasture based diets respectively. Supplementation with a high protein diet was effective in reducing carcass GR measurement after 3 weeks of supplementation with a further decrease after 5 weeks. However, unsupplemented lambs also showed a decrease in GR after 3 weeks, which was not significantly different from supplemented lambs. The length of feeding required to effect a change negated the advantage of decreased GR, although economic returns could be achieved if the pellets were more readily accepted. MenosAbstract: Overseas data suggest that feeding low energy/high protein diets can increase carcass weight (and muscle mass) while reducing fat content. The potential application of this technique to maximise the returns from overfat lambs in New Zealand was studied. One hundred and sixty ewe lambs, assessed as being overfat, were allocated on a liveweight basis to one of seven treatment groups. These comprised an initial slaughter group, 2 groups offered pasture at approximately maintenance allowance, 2 groups offered pasture at approximately half maintenance plus 200g/d of a high protein pellet and 2 groups held on a bare paddock and offered ad lib straw plus 200g/d of a high protein pellet. One group from each treatment was slaughtered after 3 weeks and the second after 5 weeks of controlled feeding. Liveweight change, carcass weight and carcass fatness were monitored. All groups lost liveweight (88-195 g/d) and estimated carcass weight (37-89g/d) over the experiment. Corrected to a common carcass weight of 15.25kg decreased GR from 11.6mm for the initial slaughter group to 9.7 and 9.2mm after 3 and 5 weeks, respectively of maintenance pasture feeding. Corresponding GR's of the supplemented groups were 9.3mm (both groups) after 3 weeks and 8.1 and 7.5mm after 5 weeks for straw and pasture based diets respectively. Supplementation with a high protein diet was effective in reducing carcass GR measurement after 3 weeks of supplementation with a further decrease after 5 weeks. Ho... Mostrar Tudo |
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Palavras-Chave: |
FSH; GnRH; Gonadatropina; LH; Puberdade. |
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Thesagro: |
Carneiro; Endocrinologia; Hormônio; Ovino; Reprodução Animal. |
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Thesaurus Nal: |
Animal genetics; Breeding season; Endocrinology; Gonadotropins; Progeny testing; Puberty; Sheep; Testes. |
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Categoria do assunto: |
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Marc: |
LEADER 02807naa a2200373 a 4500
001 1533299
005 2023-05-03
008 1992 bl uuuu u00u1 u #d
100 1 $aXU, Z. Z.
245 $aTestis size and endocrine parameters in rams as predictors of aseasonality in their daughters.$h[electronic resource]
260 $c1992
520 $aAbstract: Overseas data suggest that feeding low energy/high protein diets can increase carcass weight (and muscle mass) while reducing fat content. The potential application of this technique to maximise the returns from overfat lambs in New Zealand was studied. One hundred and sixty ewe lambs, assessed as being overfat, were allocated on a liveweight basis to one of seven treatment groups. These comprised an initial slaughter group, 2 groups offered pasture at approximately maintenance allowance, 2 groups offered pasture at approximately half maintenance plus 200g/d of a high protein pellet and 2 groups held on a bare paddock and offered ad lib straw plus 200g/d of a high protein pellet. One group from each treatment was slaughtered after 3 weeks and the second after 5 weeks of controlled feeding. Liveweight change, carcass weight and carcass fatness were monitored. All groups lost liveweight (88-195 g/d) and estimated carcass weight (37-89g/d) over the experiment. Corrected to a common carcass weight of 15.25kg decreased GR from 11.6mm for the initial slaughter group to 9.7 and 9.2mm after 3 and 5 weeks, respectively of maintenance pasture feeding. Corresponding GR's of the supplemented groups were 9.3mm (both groups) after 3 weeks and 8.1 and 7.5mm after 5 weeks for straw and pasture based diets respectively. Supplementation with a high protein diet was effective in reducing carcass GR measurement after 3 weeks of supplementation with a further decrease after 5 weeks. However, unsupplemented lambs also showed a decrease in GR after 3 weeks, which was not significantly different from supplemented lambs. The length of feeding required to effect a change negated the advantage of decreased GR, although economic returns could be achieved if the pellets were more readily accepted.
650 $aAnimal genetics
650 $aBreeding season
650 $aEndocrinology
650 $aGonadotropins
650 $aProgeny testing
650 $aPuberty
650 $aSheep
650 $aTestes
650 $aCarneiro
650 $aEndocrinologia
650 $aHormônio
650 $aOvino
650 $aReprodução Animal
653 $aFSH
653 $aGnRH
653 $aGonadatropina
653 $aLH
653 $aPuberdade
700 1 $aMcDONALD, M. F.
700 1 $aMcCUTCHEON, S. N.
700 1 $aBLAIR, H. T.
773 $tProceedings of the New Zealand Society of animal Production$gv. 52, p. 195-198, 1992.
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| 1. |  | GOBATO, L. G. M.; POLIZEL, D. M.; FERRAZ JÚNIOR, M. V. de C.; MISZURA, A. A.; BARROSO, J. P. R.; MARTINS, A. S.; GONÇALVES, J. R. S.; FERREIRA, E. M.; PIRES, A. V. Supplementation of grazing beef cattle with narasin. Pesquisa Agropecuária Brasileira, v. 55, e01270, 2020. Título em português: Suplementação de gado de corte em pastejo com narasina.| Biblioteca(s): Embrapa Unidades Centrais. |
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