Consulta: subjectFacets:"Azores"
Registros recuperados: 13
Data/hora: 02/06/2024 02:12:51

Linkage disequilibrium and diversity for three genomic regions in Azoreans and mainland Portuguese
Provedor de dados: Genetics and Molecular Biology
Autores: Branco,Claudia C.; Pacheco,Paula R.; Cabrol,Ester; Cabral,Rita; Vicente,Astrid M.; Mota-Vieira,Luisa.
Studies on linkage disequilibrium (LD) across the genome and populations have been used in recent years with the main objective of improving gene mapping of complex traits. Here, we characterize the patterns of genetic diversity of HLA loci and evaluate LD (D') extent in three genomic regions: Xq13.3, NRY and HLA. In addition, we examine the distribution of DXS1225-DXS8082 haplotype diversity in Azoreans and mainland Portuguese. Allele distribution has demonstrated that the São Miguel population is genetically very diverse; haplotype analysis revealed 100% discriminatory power for X- and Y-markers and 94.3% for HLA markers. Standardized multiallelic D' in these three genomic regions shows values lower than 0.33, thereby suggesting there is no extensive LD...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Linkage disequilibrium; X-chromosome; Y-chromosome; HLA; São Miguel; Azores.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572009000200003

Spatial variation of metal bioaccumulation in the hydrothermal vent mussel Bathymodiolus azoricus
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Cosson, R; Thiebaut, E; Company, R; Castrec Rouelle, M; Colaco, A; Martins, I; Sarradin, Pierre-marie; Bebianno, M.
The variability of the bioaccumulation of metals (Ag, Cd, Cu, Fe, Mn and Zn) was extensively studied in the mussel Bathymodiolus azoricus from five hydrothermal vent sites inside three main vent fields of increasing depth along the Mid-Atlantic Ridge: Menez Gwen, Lucky Strike and Rainbow. Metal bioaccumulation varied greatly between vent fields and even between sites inside a vent field with B. azoricus showing a great capacity to accumulate metals. The bioaccumulation of these metals also varied significantly among tissues. The main target was the gills where metals were mainly associated with soluble compounds whereas in the digestive gland they were mainly associated with insoluble compounds. Storage of metals under insoluble forms in B. azoricus seems...
Tipo: Text
Palavras-chave: Bathymodiolus; Mytilids; Hydrothermal vents; Azores; Metals; Bioaccumulation.
Ano: 2008
URL: http://archimer.ifremer.fr/doc/2008/publication-3954.pdf

Meiofauna assemblages of the Condor Seamount (North-East Atlantic Ocean) and adjacent deep-sea sediments
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Zeppilli, Daniela; Bongiorni, Lucia; Cattaneo, Antonio; Danovaro, Roberto; Santos, R.
Seamounts are currently considered hotspots of biodiversity and biomass for macro- and megabenthic taxa, but knowledge of meiofauna is still limited. Studies have revealed the existence of highly diverse meiofauna assemblages; however most data are mainly qualitative or focused only on specific groups, thus preventing comparisons among seamounts and with other deep-sea areas. This study, conducted on Condor Seamount (Azores, North-East Atlantic Ocean), describes variation in abundance, biomass, community structure and biodiversity of benthic meiofauna from five sites located on the Condor Seamount: and one site away from the seamount. While the summit of the seamount hosted the highest alpha biodiversity, the flanks and the bases showed a rich meiofauna...
Tipo: Text
Palavras-chave: Condor Seamount; Meiofauna; Biodiversity; Deep-sea sediments; Azores.
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00152/26324/24398.pdf

Seafloor Characteristics in the Azores Region (North Atlantic)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Peran, Antonio D.; Pham, Christopher K.; Amorim, Patricia; Cardigos, Frederico; Tempera, Fernando; Morato, Telmo.
Tipo: Text
Palavras-chave: Azores; Seafloor characteristics; Bathymetry; Deep sea; Geomorphology; GIS dataset.
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00590/70195/68219.pdf

Submarine platform development by erosion of a Surtseyan cone at Capelinhos, Faial Island, Azores
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Zhao, Zhongwei; Mitchell, Neil C.; Quartau, Rui; Tempera, Fernando; Bricheno, Lucy.
Erosion of volcanic islands ultimately creates shallow banks and guyots, but the ways in which erosion proceeds to create them over time and how the coastline retreat rate relates to wave conditions, rock mass strength and other factors are unclear. The Capelinhos volcano was formed in 1957/58 during a Surtseyan and partly effusive eruption that added an ~2.5 km2 tephra and lava promontory to the western end of Faial Island (Azores, central North Atlantic). Subsequent coastal and submarine erosion has reduced the subaerial area of the promontory and created a submarine platform. This study uses historical information, photos and marine geophysical data collected around the promontory to characterize how the submarine platform developed following the...
Tipo: Text
Palavras-chave: Submarine platform; Coastal erosion; Surtseyan eruption; Wave attenuation; Azores.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00590/70196/70234.pdf

Magma flow pattern in dykes of the Azores revealed by anisotropy of magnetic susceptibility
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Moreira, M. A.; Geoffroy, Laurent; Pozzi, J. P.
The localization of magma melting areas at the lithosphere bottom in extensional volcanic domains is poorly understood. Large polygenetic volcanoes of long duration and their associated magma chambers suggest that melting at depth may be focused at specific points within the mantle. To validate the hypothesis that the magma feeding a mafic crust, comes from permanent localized crustal reservoirs, it is necessary to map the fossilized magma flow within the crustal planar intrusions. Using the AMS, we obtain magmatic flow vectors from 34 alkaline basaltic dykes from SAo Jorge, SAo Miguel and Santa Maria islands in the Azores Archipelago, a hot-spot related triple junction. The dykes contain titanomagnetite showing a wide spectrum of solid solution ranging...
Tipo: Text
Palavras-chave: AMS; Azores; Dykes; Lithosphere; Magma flow; Volcanism.
Ano: 2015
URL: https://archimer.ifremer.fr/doc/00639/75144/75499.pdf

On the presence of the rissoid gastropod Alvania lamellata Dautzenberg, 1889 on the top of the azorean Condor seamount (206 m depth)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Le Duff, Michel; Bongiorni, Lucia; Zeppilli, Daniela; Grall, Jacques.
This note reports the presence of the rissoid gastropod Alvania lamellata Dautzenberg, 1889 on the top of the Condor seamount (Azores) at 206 m depth. This allows reconsideration of the ecology of the species which lives in the deep circalittoral rather than in the bathyal zone.
Tipo: Text
Palavras-chave: Rissoidae; Alvania lamellata; Açores; Mont sous-marin; Étage; Rissoidae; Alvania lamellata; Azores; Seamount; Habitat.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00199/31051/29471.pdf

Report on the CANCAP-Project for Marine Biological research in the Canarian - Cape Verdean Region of the North Atlantic Ocean (1976-1986). Part I. List of stations
Provedor de dados: Naturalis Digital Academic Repository
Autores: Land, J. van der.
A list of stations is given of the CANCAP-project for marine zoological, botanical and paleontological research in the southeastern part of the North Atlantic Ocean. This project included oceanographic expeditions as well as fieldwork on the islands and the coast of WestAfrica in the period from 1976 to 1986.
Tipo: Article / Letter to the editor
Palavras-chave: Marine biology; Marine biogeography; North Atlantic Ocean; Madeira archi- pelago; Azores; Selvagens archipelago; Canary Islands; Cape Verde Islands; Senegal; Mauritania.; 42.94.
Ano: 1987
URL: http://www.repository.naturalis.nl/record/317655

Chitons (Mollusca: Polyplacophora) procured by the CANCAP I-VII expeditions, 1976-86
Provedor de dados: Naturalis Digital Academic Repository
Autores: Kaas, P.
The 327 specimens of chitons captured during six out of seven CANCAP Expeditions have been examined. They belong to 26 species, including two recently described ones: Ischnochiton (Stenosemus) substriatus Kaas &amp; Van Belle, 1990 and Ischnochiton (Ischnochiton nicklesi Kaas &amp; Van Belle, 1990. Callistochiton pachylasmae (Di Monterosato, 1878) has been found off the coast of Morocco.
Tipo: Article / Letter to the editor
Palavras-chave: Polyplacophora; Madeira; Morocco; Selvagens Islands; Canary Islands; Mauretania; Cape Verde Islands; Azores; Taxonomy; Distribution; 42.73.
Ano: 1991
URL: http://www.repository.naturalis.nl/record/319285

On some Crustacea Stomatopoda collected by the CANCAP Expeditions in the waters of N. W. Africa and the Azores
Provedor de dados: Naturalis Digital Academic Repository
Autores: Holthuis, L.B.
New records are given of Allosquilla lillyae Manning, 1977 from the Azores, Coronida armata (Leach, 1817) from the Canary Islands, Squilla mantis (Linnaeus, 1758) from Morocco and Squilla cadenati Manning, 1977 from Mauritania. Allosquilla lillyae is described in detail.
Tipo: Article / Letter to the editor
Palavras-chave: Crustacea Stomatopoda; Allosquilla; Coronida; Squilla; Description; Distribution; N. W. Africa; Azores; 42.74.
Ano: 1984
URL: http://www.repository.naturalis.nl/record/319280

Contribution to the knowledge of decapod crustaceans from Madeira and the Canary Islands
Provedor de dados: Naturalis Digital Academic Repository
Autores: Fransen, C.H.J.M.; Wirtz, P.
The decapods Eualus lebourae, Processa modica carolii, Palaemon xiphias, Philocheras bispinosus, and Inachus phalangium are recorded from the coasts of Madeira for the first time. The decapods Hippolyte garciarasoi, Hippolyte varians, Eualus lebourae, Processa parva, Processa modica carolii, Processa robusta, Palaemonella atlantica, Periclimenes wirtzi, Philocheras bispinosus, and Philocheras fasciatus, are recorded from the coasts of the Canary Islands for the first time. Eualus occultus, Processa parva and Processa modica carolii are recorded from the Cape Verde Islands for the first time. Processa parva is also recorded for the Azores for the first time. For Eualus occultus, Hippolyte garciarasoi, Processa modica carolii, Periclimenes wirtzi and...
Tipo: Article / Letter to the editor
Palavras-chave: Crustacea; Decapoda; Madeira; Canary Islands; Azores; Cape Verde Islands; New records; 42.74.
Ano: 1997
URL: http://www.repository.naturalis.nl/record/318997

Phylogeography, genetic diversity and structure of the poecilosclerid sponge Phorbas fictitius at oceanic islands
Provedor de dados: Naturalis Digital Academic Repository
Autores: Xavier, J.R.; Soest, R.W.M. van; Breeuwer, J.A.J.; Martins, A.M.F.; Menken, S.B.J.
In this study we assessed the sequence variation in the I3-M11 partition of the mtDNA cytochrome c oxidase subunit I gene (COI) in ten populations of the Atlanto-Mediterranean demosponge Phorbas fictitius (Porifera: Poecilosclerida) at two spatial scales: a regional scale comparing mainland (Iberian) and insular (Macaronesian) populations, and a local (Archipelagic) scale focusing on different island populations of the Azores archipelago. A multiple approach combining diversity measures, FST estimates, phylogenetic inference and nested clade phylogeographic analysis was used to assess the genetic structure and elucidate the evolutionary history of this species. Genetic differentiation, based of FST estimates, was found among most populations at both scales...
Tipo: Article / Letter to the editor
Palavras-chave: Azores; Genetic diversity; Iberia; Macaronesia; Mitochondrial DNA; Porifera; 42.72.
Ano: 2010
URL: http://www.repository.naturalis.nl/record/355610

The genus Telmatactis Gravier, 1916 (Actiniaria: Acontiaria: Isophelliidae) in Greece and the eastern Mediterranean
Provedor de dados: Naturalis Digital Academic Repository
Autores: Hartog, J.C. den.
Three species of the actinian genus Telmatactis Gravier, 1916, viz. T. forskalii (Ehrenberg, 1834), T. solidago (Duchassaing &amp; Michelotti, 1864) and T. cricoides (Duchassaing, 1850), occurring in Greece and the eastern Mediterranean, are described and discussed. Detailed data on the cnidom of the three species are provided. The characteristic penicilli of members of the genus Telmatactis are discussed. These penicilli were classified by Schmidt (1969, 1972) as p-rhabdoids (= penicilli) B1b, but it is here claimed that they actually belong in Schmidt's B2 group (provisionally as penicilli B2c). They correspond in general form and as to their distribution in the actinian polyp with the more usual penicilli B2a sensu Schmidt (1969), but unlike these, they...
Tipo: Article / Letter to the editor
Palavras-chave: Actiniaria; Isophelliidae; Telmatactis; Nematocysts; Penicilli B; Greece; Eastern Mediterranean; Azores; New records; Inter-glacial relicts; 42.74.
Ano: 1995
URL: http://www.repository.naturalis.nl/record/318875