Graptólitos do Silúrico do Sinclinal de Buçaco : paleontologia e biostratigrafia = Graptolite faunas from Silurian of the Buçaco Syncline : paleontology and biostratigraphy

Estudaram-se exemplares de Graptólitos do Silúrico do sinclinal de Buçaco proveninentes de colecções de Nery Delgado e de amostragem recente. Foi realizada a actualização taxonómica das colecções antigas. Determinaram-se novas espécies e biozonas. Os novos resultados permitem precisar o Silúrico do Buçaco que tem muitas características estratigráficas e sedimentológicas em comum com o de outras áreas da parte sul da Zona Centro Ibérica

Dados palinoestratigráficos preliminares do Gorstiano, Silúrico, da Formação de Sazes, Sinclinal do Buçaco = Preliminary palynostratigraphic data from the Gorstian, Silurian, Sazes Formation, Buçaco Syncline

Novos dados bioestratigráficos foram obtidos na sucessão estratigráfica do Paleozóico Inferior da região do Buçaco. A Formação de Sazes (Silúrico) está a ser estudada ao nível palinológico (miosporos e quitinozoários) e de macrofósseis (graptólitos), com o intuito de rever e complementar dados bioestratigráficos anteriormente descritos. Com base nos dados palinológicos, parte da Fm. de Sazes foi datada com mais precisão como pertencendo ao Gorstiano e, pela primeira vez nesta região, também foram identificados criptosporos. Novos dados são esperados com a continuação deste estudo

Nuevos datos sobre la sucesión del "CXG" (Grupo das Beiras) : evidencia sedimentaria del origen glacioderivado de las facies conglomeráticas de la FM. del Cabeço das Popas, en la región de Monfortinho (Portugal Central)

La presencia de "dropstones" en las facies finas laminadas que se intercalan entre los orto y paraconglomerados característicos de la Fm. del Cabeço das opas (CXG: Grupo das Beiras), prueba su origen glacioderivado. La edad véndica media-superior considerada para esta Fm. permite postular la existencia de episodios glaciares postvarangerienses en el Macizo Hespérico

Litoestratigrafía del “Dominio Esquisto-Grauváquico” en Portugal: una reevaluación

A synthesis of the knowledge of the Schist-Greywacke Domain (SGD) in Portugal is here presented. Until recently, this sequence assumed the designation of Dúrico-Beirão Supergroup composed by the Douro Group (DG) and the Beiras Group (BG). The DG is considered of Neoproterozoic – Cambrian age and the BG is of Neoproterozoic age. The identification and mapping in the BG of an unconformity as the Cadomian unconformity identified in Spain, which splits the Neoproterozoic in “lower Alcudian” and “upper Alcudian”, is a turning point for the understanding and establishment of consistent stratigraphic sequences that now compose the Fróia and the Lousã groups assembled in the Beiras Supergroup. These new groups are correlated with the Neoproterozoic sequences currently recognized in Spain: the Lousã group is equivalent to the Ibor Group (upper Alcudian) and the Fróia Group is equivalent pro parte, to the Domo Extremeño Supergroup.  En este trabajo se presenta una síntesis del conocimiento actual del Dominio del Complejo Esquisto-Grauváquico en Portugal. Hasta al presente esta secuencia ha sido designada como Supergrupo Dúrico-Beirão, compuesto por el Grupo Douro (GD) y por el Grupo Beiras (GB). El GD se consideraba de edad Ediacárico superior – Cámbrico inferior y el GB era atribuido al Neoproterozoico. La identificación y cartografía en el GB de una discordancia correlacionable con la del Cadomiense identificada en España, que divide el Neoproterozoico en "Alcudiense inferior" y "Alcudiense superior", es un punto de inflexión para la comprensión y el establecimiento de secuencias estratigráficas consistentes, que ahora componen los grupos Fróia y Lousã reunidos en el Supergrupo Beiras. Estos nuevos grupos se correlacionan con las secuencias neoproterozoicas actualmente reconocidas en España: el Grupo Lousã es equivalente al Grupo Ibor (Alcudiense Superior) y el Grupo Fróia es equivalente, pro parte, al Supergrupo Domo Extremeño

Litoestratigrafía del “Dominio Esquisto-Grauváquico” en Portugal: una reevaluación

[Abstract] A synthesis of the knowledge of the Schist-Greywacke Domain (SGD) in Portugal is here presented. Until recently, this sequence assumed the designation of Dúrico-Beirão Supergroup composed by the Douro Group (DG) and the Beiras Group (BG). The DG is considered of Neoproterozoic – Cambrian age and the BG is of Neoproterozoic age. The identification and mapping in the BG of an unconformity as the Cadomian unconformity identified in Spain, which splits the Neoproterozoic in “lower Alcudian” and “upper Alcudian”, is a turning point for the understanding and establishment of consistent stratigraphic sequences that now compose the Fróia and the Lousã groups assembled in the Beiras Supergroup. These new groups are correlated with the Neoproterozoic sequences currently recognized in Spain: the Lousã group is equivalent to the Ibor Group (upper Alcudian) and the Fróia Group is equivalent pro parte, to the Domo Extremeño Supergroup.[Resumen] En este trabajo se presenta una síntesis del conocimiento actual del Dominio del Complejo Esquisto-Grauváquico en Portugal. Hasta al presente esta secuencia ha sido designada como Supergrupo Dúrico-Beirão, compuesto por el Grupo Douro (GD) y por el Grupo Beiras (GB). El GD se consideraba de edad Ediacárico superior – Cámbrico inferior y el GB era atribuido al Neoproterozoico. La identificación y cartografía en el GB de una discordancia correlacionable con la del Cadomiense identificada en España, que divide el Neoproterozoico en "Alcudiense inferior" y "Alcudiense superior", es un punto de inflexión para la comprensión y el establecimiento de secuencias estratigráficas consistentes, que ahora componen los grupos Fróia y Lousã reunidos en el Supergrupo Beiras. Estos nuevos grupos se correlacionan con las secuencias neoproterozoicas actualmente reconocidas en España: el Grupo Lousã es equivalente al Grupo Ibor (Alcudiense Superior) y el Grupo Fróia es equivalente, pro parte, al Supergrupo Domo Extremeño

RAS gene polymorphisms, classical risk factors and the advent of coronary artery disease in the Portuguese population

<p>Abstract</p> <p>Background</p> <p>Several polymorphisms within the renin-angiotensin system cluster of genes have been associated with the advent of coronary artery disease (CAD) or related pathologies. We investigated the distribution of 5 of these polymorphisms in order to find any association with CAD development and distinguish if any of the biochemical and behavioural factors interact with genetic polymorphisms in the advent of the disease.</p> <p>Methods</p> <p><it>ACE </it>I/D (rs4340), <it>ACE </it>A11860G (rs4343), <it>AT1R </it>A1166C (rs5186), <it>AGT </it>T174M (rs4762) and <it>AGT </it>M235T (rs699) gene polymorphisms were PCR-RFLP analysed in 298 CAD patients and 510 controls from Portugal. Several biochemical and behavioural markers were obtained.</p> <p>Results</p> <p><it>ACE </it>I/D DD and <it>ACE</it>11860 GG genotypes are risk factors for CAD in this population. The simultaneous presence of <it>ACE </it>I/D I and <it>ACE</it>11860 A alleles corresponds to a significant trend towards a decrease in CAD incidence. We found several synergistic effects between the studied polymorphisms and classical risk factors such as hypertension, obesity, diabetes and dyslipidaemia: the presence of the DD genotype of <it>ACE </it>I/D (and also <it>ACE</it>11860 GG) increases the odds of developing CAD when associated to each one of these classical risk factors, particularly when considering the male and early onset CAD subgroup analysis; <it>AGT</it>235 TT also increases the CAD risk in the presence of hypertension and dyslipidaemia, and <it>AT1R</it>1166 interacts positively with hypertension, smoking and obesity.</p> <p>Conclusion</p> <p><it>ACE </it>polymorphisms were shown to play a major role in individual susceptibility to develop CAD. There is also a clear interaction between RAS predisposing genes and some biochemical/environmental risk factors in CAD onset, demonstrating a significant enhancement of classical markers particularly by <it>ACE </it>I/D and <it>ACE</it>11860.</p

Global Spatial Risk Assessment of Sharks Under the Footprint of Fisheries

Effective ocean management and conservation of highly migratory species depends on resolving overlap between animal movements and distributions and fishing effort. Yet, this information is lacking at a global scale. Here we show, using a big-data approach combining satellite-tracked movements of pelagic sharks and global fishing fleets, that 24% of the mean monthly space used by sharks falls under the footprint of pelagic longline fisheries. Space use hotspots of commercially valuable sharks and of internationally protected species had the highest overlap with longlines (up to 76% and 64%, respectively) and were also associated with significant increases in fishing effort. We conclude that pelagic sharks have limited spatial refuge from current levels of high-seas fishing effort. Results demonstrate an urgent need for conservation and management measures at high-seas shark hotspots and highlight the potential of simultaneous satellite surveillance of megafauna and fishers as a tool for near-real time, dynamic management