| |
|
|
|
Registro Completo |
|
Biblioteca(s): |
Embrapa Caprinos e Ovinos. |
|
Data corrente: |
01/08/1992 |
|
Data da última atualização: |
02/01/2024 |
|
Autoria: |
DINGWALL, W. S.; ROBINSON, J. J.; AITKEN, R. P.; FRASER, C. |
|
Título: |
Studies on reproduction in prolific ewes 9. Embryo survival, early foetal growth and within-litter variation in foetal size. |
|
Ano de publicação: |
1987 |
|
Fonte/Imprenta: |
Journal of Agricultural Science Cambridge, v. 108, n. 2, p. 311-319, Apr. 1987. |
|
DOI: |
https://doi.org/10.1017/S0021859600079314 |
|
Idioma: |
Inglês |
|
Conteúdo: |
Abstract: In Expt 1, 34 individually-penned Finn Dorset ewes of mean live weight 68 kg were synchronized in oestrus and mated to Suffolk rams. From mating until day 28 of pregnancy each received daily 15 MJ of metabolizable energy (ME) and 225 g crude protein (CP). From day 28 to slaughter on days 34, 41, 48 or 55 half of the ewes continued on this feeding regime and half had their daily intake reduced abruptly to 7·5 MJ of ME and 112 g CP. The mean number of ovulations per ewe was 4·03 (range 2–8) and the mean number of viable foetuses at time of slaughter 3·35 (range 2–6). The combined loss of ova (fertilization failure and early embryonic death) was 14·6% and detectable foetal deaths 2·2%. Level of feeding had no significant effect on these measures or on foetal growth. Foetal growth from 34 to 55 days was described by the equation In w = 0·962–18·613 e-0·0272t–0·00091t(f–3), where w = foetal weight (kg), t = age (days) and f = litter size. Within-litter variability measured as the S.D. of In w (kg) was 0–081 for twins, 0·108 for triplets and 0·106 for quadruplets and higher multiples. In a second experiment Suffolk × Finn Dorset embryos were transplanted at the rate of two per uterine horn into 15 recipient Finn Dorset ewes. Embryo survival was 72% and foetal weights at 60 days varied from 67 to 146% of the mean value of 66 g. Withinlitter variation in foetal size was only about 70% of that expected for foetuses developing from the variable distribution in their initial positioning that occurs naturally. The correlation between foetal weight and placental weight at day 60 was 0·72 (P < 0001) indicating that the association between foetal weight and placental weight in prolific ewes is not confined to late pregnancy. The results of both experiments are consistent with the hypothesis that the greater within-litter variability in birth weight in large litters is controlled by events in early pregnancy. MenosAbstract: In Expt 1, 34 individually-penned Finn Dorset ewes of mean live weight 68 kg were synchronized in oestrus and mated to Suffolk rams. From mating until day 28 of pregnancy each received daily 15 MJ of metabolizable energy (ME) and 225 g crude protein (CP). From day 28 to slaughter on days 34, 41, 48 or 55 half of the ewes continued on this feeding regime and half had their daily intake reduced abruptly to 7·5 MJ of ME and 112 g CP. The mean number of ovulations per ewe was 4·03 (range 2–8) and the mean number of viable foetuses at time of slaughter 3·35 (range 2–6). The combined loss of ova (fertilization failure and early embryonic death) was 14·6% and detectable foetal deaths 2·2%. Level of feeding had no significant effect on these measures or on foetal growth. Foetal growth from 34 to 55 days was described by the equation In w = 0·962–18·613 e-0·0272t–0·00091t(f–3), where w = foetal weight (kg), t = age (days) and f = litter size. Within-litter variability measured as the S.D. of In w (kg) was 0–081 for twins, 0·108 for triplets and 0·106 for quadruplets and higher multiples. In a second experiment Suffolk × Finn Dorset embryos were transplanted at the rate of two per uterine horn into 15 recipient Finn Dorset ewes. Embryo survival was 72% and foetal weights at 60 days varied from 67 to 146% of the mean value of 66 g. Withinlitter variation in foetal size was only about 70% of that expected for foetuses developing from the variable distribution in their initial ... Mostrar Tudo |
|
Palavras-Chave: |
Embriologia. |
|
Thesagro: |
Ovino; Reprodução. |
|
Thesaurus Nal: |
Embryology; Reproduction; Sheep; Survival rate. |
|
Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
|
Marc: |
LEADER 02731naa a2200253 a 4500
001 1523227
005 2024-01-02
008 1987 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.1017/S0021859600079314$2DOI
100 1 $aDINGWALL, W. S.
245 $aStudies on reproduction in prolific ewes 9. Embryo survival, early foetal growth and within-litter variation in foetal size.
260 $c1987
520 $aAbstract: In Expt 1, 34 individually-penned Finn Dorset ewes of mean live weight 68 kg were synchronized in oestrus and mated to Suffolk rams. From mating until day 28 of pregnancy each received daily 15 MJ of metabolizable energy (ME) and 225 g crude protein (CP). From day 28 to slaughter on days 34, 41, 48 or 55 half of the ewes continued on this feeding regime and half had their daily intake reduced abruptly to 7·5 MJ of ME and 112 g CP. The mean number of ovulations per ewe was 4·03 (range 2–8) and the mean number of viable foetuses at time of slaughter 3·35 (range 2–6). The combined loss of ova (fertilization failure and early embryonic death) was 14·6% and detectable foetal deaths 2·2%. Level of feeding had no significant effect on these measures or on foetal growth. Foetal growth from 34 to 55 days was described by the equation In w = 0·962–18·613 e-0·0272t–0·00091t(f–3), where w = foetal weight (kg), t = age (days) and f = litter size. Within-litter variability measured as the S.D. of In w (kg) was 0–081 for twins, 0·108 for triplets and 0·106 for quadruplets and higher multiples. In a second experiment Suffolk × Finn Dorset embryos were transplanted at the rate of two per uterine horn into 15 recipient Finn Dorset ewes. Embryo survival was 72% and foetal weights at 60 days varied from 67 to 146% of the mean value of 66 g. Withinlitter variation in foetal size was only about 70% of that expected for foetuses developing from the variable distribution in their initial positioning that occurs naturally. The correlation between foetal weight and placental weight at day 60 was 0·72 (P < 0001) indicating that the association between foetal weight and placental weight in prolific ewes is not confined to late pregnancy. The results of both experiments are consistent with the hypothesis that the greater within-litter variability in birth weight in large litters is controlled by events in early pregnancy.
650 $aEmbryology
650 $aReproduction
650 $aSheep
650 $aSurvival rate
650 $aOvino
650 $aReprodução
653 $aEmbriologia
700 1 $aROBINSON, J. J.
700 1 $aAITKEN, R. P.
700 1 $aFRASER, C.
773 $tJournal of Agricultural Science Cambridge$gv. 108, n. 2, p. 311-319, Apr. 1987.
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Caprinos e Ovinos (CNPC) |
|
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
URL |
Voltar
|
|
|
Registro Completo
|
Biblioteca(s): |
Embrapa Gado de Leite. |
|
Data corrente: |
17/02/2016 |
|
Data da última atualização: |
31/01/2024 |
|
Tipo da produção científica: |
Artigo em Periódico Indexado |
|
Circulação/Nível: |
B - 3 |
|
Autoria: |
MORAIS, R. K. O. de; SILVA, A. M. de A.; BEZERRA, L. R.; CARNEIRO, H.; MOREIRA, M. N.; MEDEIROS, F. F. de. |
|
Afiliação: |
Raissa Kiara Oliveira de Morais, Universidade Federal de Campina Grande; Aderbal Marcos de Azevedo Silva, Universidade Federal de Campina Grande; Leilson Rocha Bezerra, Universidade Federal do Piauí; HELOISA CARNEIRO, CNPGL; Milenna Nunes Moreira, Universidade Federal de Campina Grande; Fabiola Franklin de Medeiros, Universidade Federal de Campina Grande. |
|
Título: |
In vitro degradation and total gas production of byproducts generated in the biodiesel production chain. |
|
Ano de publicação: |
2015 |
|
Fonte/Imprenta: |
Acta Scientiarum. Animal Sciences, v. 37, n. 2, p. 143-148, 2015. |
|
Idioma: |
Inglês |
|
Conteúdo: |
This study aimed to evaluate the in vitro degradation and total gas production of different oil seed press cakes from a biodiesel production chain gas through the use of a semi-automatic technique of gas production in vitro. The treatments consisted of substituting elephant grass in increasing levels, 0%, 30, 50 and 70%, with the byproducts of Gossyypium hirsutum, Ricinus communis, Moringa oleifeira, Jatropha curcas and Helianthus annus. The oil seed press cakes of Moringa oleifeira had the highest rate of in vitro degradation of dry matter compared with other foods but did not result in a higher final volume of gases production. Gossyypium hirsutum, Pinhão manso curcas and Ricinus communis showed a higher in vitro degradability of similar dry matter. The highest total gas production was obtained by the oil seed press cakes of Helianthus annus. The oil seed press cakes of Moringa oleifeira can replace elephant grass up to 70% and therefore reduce both greenhouse gas emissions and energy loss for the animal. |
|
Palavras-Chave: |
Degradability; Ruminal fermentation. |
|
Thesagro: |
Gossypium Hirsutum; Ricinus Communis. |
|
Thesaurus NAL: |
greenhouse gases. |
|
Categoria do assunto: |
F Plantas e Produtos de Origem Vegetal |
|
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/139246/1/Cnpgl-2015-ActaSciAnSci-In-vitro-degr-and-total-gas.pdf
|
|
Marc: |
LEADER 01774naa a2200241 a 4500
001 2037397
005 2024-01-31
008 2015 bl uuuu u00u1 u #d
100 1 $aMORAIS, R. K. O. de
245 $aIn vitro degradation and total gas production of byproducts generated in the biodiesel production chain.$h[electronic resource]
260 $c2015
520 $aThis study aimed to evaluate the in vitro degradation and total gas production of different oil seed press cakes from a biodiesel production chain gas through the use of a semi-automatic technique of gas production in vitro. The treatments consisted of substituting elephant grass in increasing levels, 0%, 30, 50 and 70%, with the byproducts of Gossyypium hirsutum, Ricinus communis, Moringa oleifeira, Jatropha curcas and Helianthus annus. The oil seed press cakes of Moringa oleifeira had the highest rate of in vitro degradation of dry matter compared with other foods but did not result in a higher final volume of gases production. Gossyypium hirsutum, Pinhão manso curcas and Ricinus communis showed a higher in vitro degradability of similar dry matter. The highest total gas production was obtained by the oil seed press cakes of Helianthus annus. The oil seed press cakes of Moringa oleifeira can replace elephant grass up to 70% and therefore reduce both greenhouse gas emissions and energy loss for the animal.
650 $agreenhouse gases
650 $aGossypium Hirsutum
650 $aRicinus Communis
653 $aDegradability
653 $aRuminal fermentation
700 1 $aSILVA, A. M. de A.
700 1 $aBEZERRA, L. R.
700 1 $aCARNEIRO, H.
700 1 $aMOREIRA, M. N.
700 1 $aMEDEIROS, F. F. de
773 $tActa Scientiarum. Animal Sciences$gv. 37, n. 2, p. 143-148, 2015.
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Gado de Leite (CNPGL) |
|
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
Fechar
|
| Expressão de busca inválida. Verifique!!! |
|
|
