Encontrados 15 documentos, a visualizar página 1 de 2
THE ECONOMIC AND SOCIOCULTURAL ROLE OF LIVESTOCK IN THE WELLBEING OF RURAL COMM...
Bettencourt, Elisa Maria Varela; Tilman, Mário; Henriques, Pedro Damião de Sousa; Narciso, Vanda; Carvalho, Maria Leonor da SilvaThe livestock species play very important economic and socio-cultural roles for the wellbeing of rural households, such as food supply, source of income, asset saving, source of employment, soil fertility, livelihoods, transport, agricultural traction, agricultural diversification and sustainable agricultural production. The aim of this work was to identify and characterize the different roles that livestock an...
THE LIVESTOCK ROLES IN THE WELLBEING OF RURAL COMMUNITIES OF TIMOR-LESTE
Bettencourt, Elisa Maria Varela; Tilman, Mário; Henriques, Pedro Damião de Sousa; Narciso, Vanda; Carvalho, Maria Leonor da SilvaThe livestock species play very important economic and socio-cultural roles for the wellbeing of rural households, such as food supply, source of income, asset saving, source of employment, soil fertility, livelihoods, transport, agricultural traction, agricultural diversification and sustainable agricultural production. The aim of this work was to identify and characterize the different roles that livestock an...
Ultrastructural study of in vivo produced ovine embryos: characterization of se...
Bettencourt, Elisa Maria Varela; Bettencourt, Carlos Manuel Varela; Ferreira, Paulo; Romão, Ricardo Jorge; Rocha, António; Sousa, MárioThe ultrastructure of in vivo produced ovine embryos, at the morula, early blastocyst and late blastocyst stages, was evaluated using transmission electron microscopy. In vivo produced embryos (n=14) were obtained from Portuguese Black Merino ewes, superovulated during Spring. Embryos were recovered by abdominal laparotomy, under general anesthesia, on day 6 or 7 after sponge removal. Embryos were processed for...
Cryopreservation of ovine in vitro produced embryos using centrifugation and cy...
Romão, Ricardo Jorge; Marques, Carla; Batista, Maria; Barbas, João; Horta, António; Carolino, Nuno; Bettencourt, Elisa; Pereira, RosaThe cryosurvival of ovine in vitro produced embryos are still low, thus preventing its routine transfer. Attempts have been made to override this problem by decreasing embryos lipid content or protecting their structure with cytoskeletal stabilizers. In this study we used embryo mechanical delipidation through centrifugation in the presence or absence of cytocalasin D testing its effect on embryo quality and cr...
The original coffee plant of the Hybrid of Timor: historical, economic and soci...
Henriques, Pedro; Nogueira, Pedro; Várzea, Vitor; Bettencourt, ElisaThe original plant of the hybrid of Timor, is the result of the crossing of arabic species, with 44 chromosomes, not rust resistant, with robust species, rust resistent, with 22 chromosome. This unlikely crossing, due to the Arabic species has twice the chromosomes of the robusta species, happened in the 1930s by a fluke of nature in Timor Leste. The original plant of the hybrid of Timor is a unique plant in th...
THE ROLE OF ECONOMIC AND SOCIOCULTURAL FUNCTIONS OF ANIMAL PRODUCTION IN WELLBE...
Bettencourt, Elisa Maria Varela; Tilman, Mário; Henriques, Pedro Damião de Sousa; Narciso, Vanda; Carvalho, Maria Leonor da SilvaLivestock production in Timor-Leste is predominantly familiar being chickens, pigs, goats, cattle, horses, buffaloes and sheep the main species. The livestock species play very important economic and sociocultural roles for the well-being of rural households, such as food supply, source of income, asset saving, source of employment, soil fertility, livelihoods, transport, agricultural traction, agricultural di...
Evaluation of two methods of in vitro production of ovine embryos using fresh o...
Romão, Ricardo; Marques, Carla; Batista, Maria Conceição; Vasques, Maria Irene; Barbas, J Pedro; Horta, António M; Carolino, NunoSuccessful production of high quality blastocysts depends on the use of a culture system that ensures the acquisition of developmental competence by the maturing oocyte followed by an efficient in vitro fertilization. In the present work the effect of FSH and pyruvate in an EGF containing medium for ovine oocyte maturation prior to insemination with fresh(F)or frozen–thawed (FT) semen on embryo developmental co...
RESULTADOS DE EXAMES ANDROLÓGICOS EM TOUROS DE APTIDÃO CREATOPOIÉTICA NO SUL DE...
Romão, Ricardo; Cargaleiro, Kataline; Martelo, Rui; Peralta, Diogo; Carolino, Nuno; Bettencourt, Elisa Maria VarelaEm Portugal o exame andrológico não constitui uma rotina em muitas das explorações de bovinos de produção de carne explorados em regime extensivo. Nos últimos anos tem-se atribuído mais importância a esta prova sobretudo pela preocupação crescente em melhorar os índices de produtividade e eficiência reprodutiva e porque está claramente demonstrada a relação custobenefício deste exame (Chenoweth, 2011). Além da ...
VARIAÇÃO NA PERCENTAGEM DE ESPERMATOZÓIDES COM FORMAS ANORMAIS EM RAÇAS DE TOUR...
Cargaleiro, Kataline; Romão, Ricardo; Rui, Martelo; Carolino, Nuno; Bettencourt, Elisa Maria VarelaA avaliação da percentagem de formas anormais de espermatozóides (spz) constitui um dos critérios possíveis de reprovação aquando da realização de exame andrológico a touros (Higdon III et al., 2000). Para a aprovação de um touro reprodutor, recomenda-se que as formas anormais sejam inferiores a 30%, pela influência que este parâmetro tem na fertilidade (Chenoweth et al.,1993, Amann et al., 2000, Thundathil et ...
Exame do touro reprodutor
Bettencourt, Elisa; Romão, RicardoOs autores referem a importância da avaliação dos machos dentro da estratégia de gestão reprodutiva de uma exploração de bovinos. É referida a metodologia do exame andrológico que terá como objectivo a elaboração de um relatório de avaliação do animal, obedecendo a critérios que sejam aceites internacionalmente.
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