20 documents found, page 1 of 2
Identification of adult and juvenile Atherina presbyter Cuvier, 1829 in a marin...
Almada, Frederico José Oliveira de; Carpi, Piera; Carlos, Fábio Ferreira; Francisco, Sara Martins; Faria, Ana Margarida; Lungu, RuxandaA simple PCR-RFLP consisting in the digestion of a fragment of the 12S ribosomal RNA (12SrRNA) with species-specific restriction enzymes (MboII and HinfI) was developed to distinguish northeastern Atlantic species in the genus Atherina. Unambiguous identification of morphologically similar sympatric species is frequently difficult, especially when younger specimens are included in the analysis. Genetic and morp...
Historical gene flow constraints in a northeastern atlantic fish: Phylogeograph...
Almada, Frederico José Oliveira de; Francisco, Sara Martins; Lima, Cristina Silva; Fitzgerald, Richard; Mirimin, Luca; Villegas-Ríos, DavidThe distribution and demographic patterns of marine organisms in the north Atlantic were largely shaped by climatic changes during the Pleistocene, when recurrent glacial maxima forced them to move south or to survive in northern peri-glacial refugia. These patterns were also influenced by biological and ecological factors intrinsic to each species, namely their dispersion ability. The ballan wrasse (Labrus ber...
On the absence of genetic differentiation between morphotypes of the ballan wra...
Almada, Frederico José Oliveira de; Casas, Laura; Francisco, Sara Martins; Villegas-Ríos, David; Saborido-Rey, Fran; Irigoien, XabierThe ballan wrasse, Labrus bergylta (Labridae), is a protogynous hermaphrodite fish common in the north-eastern Atlantic from Norway to Morocco. It is a commercially important resource for local fisheries and is currently being used as cleaner fish to control sea lice in salmon farms in northern Europe. Two distinct colour patterns have been recently reported in the literature: plain and spotted. These individua...
Establishment of a coastal fish in the Azores : Recent colonisation or sudden e...
Stefanni, Sergio; Castilho, Rita; Sala-Bozano, Maria; Robalo, Joana Isabel; Francisco, Sara Martins; Santos, Ricardo Serrão; Marques, N.; Brito, AlbertoThe processes and timescales associated with ocean-wide changes in the distribution of marine species have intrigued biologists since Darwin's earliest insights into biogeography. The Azores, a mid-Atlantic volcanic archipelago located >1000 km off the European continental shelf, offers ideal opportunities to investigate phylogeographic colonisation scenarios. The benthopelagic sparid fish known as the common t...
Phylogeographic pattern and glacial refugia of a rocky shore species with limit...
Francisco, Sara Martins; Almada, Vítor Carvalho; Faria, Cláudia Barreiros Macedo de; Velasco, Eva Maria; Robalo, Joana IsabelPhylogeographic patterns among coastal fishes are expected to be influenced by distinct ecological, biological and life history traits, along with historical events and oceanography (past and present). This study focuses on the broad range phylogeography of the Montagu’s blenny Coryphoblennius galerita, a species with well-known ecological features, strictly tied to rocky environments and with limited dispersal...
Metapopulations in temporary streams - The role of drought-flood cycles in prom...
Santos, Carla Sousa; Robalo, Joana Isabel; Francisco, Sara Martins; Carrapato, Carlos; Cardoso, Ana Cristina; Doadrio, IgnacioGenetic factors have direct and indirect impacts in the viability of endangered species. Assessing their genetic diversity levels and population structure is thus fundamental for conservation and management. In this paper we use mitochondria] and nuclear markers to address phylogeographic and demographic data on the critically endangered Anaecypris hispanica, using a broad sampling set which covered its known d...
Gaidropsarus (Gadidae, Teleostei) of the North Atlantic Ocean: A brief phylogen...
Francisco, Sara Martins; Robalo, Joana Isabel; Stefanni, Sergio; Levy, André; Almada, Vítor CarvalhoThe phylogenetic relationships among theNorth Atlantic Gaidropsarus and between the three Gaidropsarinae genera Gaidropsarus, Ciliata and Enchelyopus are reviewed with the hitherto most comprehensive taxonomic sampling of this group. Phylogenetic results (maximum parsimony, maximum likelihood and Bayesian inference) based on nuclear (rhodopsin) and concatenated mitochondrial (12s, 16s and cytb)markers clearly s...
Are local extinctions and recolonizations continuing at the colder limits of ma...
Robalo, Joana Isabel; Crespo, Ana Maria Azambuja Farinha da Conceição Pereira; Castilho, Rita; Francisco, Sara Martins; Amorim, Maria Clara PessoaIn this paper, we compare the populations of the Lusitanian toadfish Halobatrachus didactylus along the Portuguese shore, using a putative fragment of the mitochondrial control region and the first intron of the S7 ribosomal protein gene. This demersal species ranges from the tropical West African coast to the Iberian Peninsula and the Mediterranean, having its northern limit in the Tagus River. For the putativ...
A rapid and inexpensive molecular technique to discriminate the north-eastern A...
Almada, Vítor Carvalho; Francisco, Sara Martins; Rosa, Inês; Domingues, Vera dos Santos; Cabral, Henrique; Almada, Frederico José Oliveira deThis note describes a rapid and inexpensive Restriction Fragment Length Polymorphism technique to discriminate all species of Atherina (Pisces: Atherinidae) of the north-eastern Atlantic and the Mediterranean. This technique is based on digestion of a fragment of the 12S ribosomal RNA (12SrRNA) gene region of mitochondrial DNA with restriction enzymes that recognize species-specific nucleotide sites. The three ...
Unexpected high genetic diversity at the extreme northern geographic limit of T...
Almada, Vítor Carvalho; Almada, Frederico José Oliveira de; Francisco, Sara Martins; Castilho, Rita; Robalo, Joana IsabelThe longspined bullhead (Taurulus bubalis, Euphrasen 1786) belongs to the family Cottidae and is a rocky shore species that inhabits the intertidal zones of the Eastern Atlantic since Iceland, southward to Portugal and also the North Sea and Baltic, northward to the Gulf of Finland, with some occurrences in the northern Mediterranean coasts eastward to the Gulf of Genoa. We analysed the phylogeographic patterns...