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Mito-nuclear sequencing is paramount to correctly identify sympatric hybridizin...
Santos, Carla Sousa; Pereira, Ana Martins; Branco, Paulo; Costa, Gonçalo J.; Santos, José M.; Ferreira, Maria Teresa; Lima, Cristina M.Background. Hybridization may drive speciation and erode species, especially when intrageneric sympatric species are involved. Five sympatric Luciobarbus species—Luciobarbus sclateri (Günther, 1868), Luciobarbus comizo (Steindachner, 1864), Luciobarbus microcephalus (Almaça, 1967), Luciobarbus guiraonis (Steindachner, 1866), and Luciobarbus steindachneri (Almaça, 1967)—are commonly identified in field surveys b...
Asexual origin of brooding in the sea anemones Actinia equina and A. schmidti: ...
Pereira, Ana Martins; Cadeireiro, Emília Margarida; Robalo, Joana IsabelReproduction by sexual or asexual viviparity is a common phenomenon in some anemone species. In this short communication, the origin of the brooded young of Actinia equina and A. schmidti from the Portuguese shore was investigated. DNA was extracted from 56 brooding adult Actinia sp. and the nuclear gene that codes for the 28S ribosomal subunit was sequenced. Species identity was then assessed using GenBank. In...
Broad-scale sampling of primary freshwater fish populations reveals the role of...
Santos, Carla Sousa; Robalo, Joana Isabel; Pereira, Ana Martins; Branco, Paulo; Santos, José Maria; Ferreira, Maria Teresa; Sousa, MónicaBackground. Worldwide predictions suggest that up to 75% of the freshwater fish species occurring in rivers with reduced discharge could be extinct by 2070 due to the combined effect of climate change and water abstraction. The Mediterranean region is considered to be a hotspot of freshwater fish diversity but also one of the regions where the effects of climate change will be more severe. Iberian cyprinids are...
Absence of consistent genetic differentiation among several morphs of Actinia (...
Pereira, Ana Martins; Brito, Cristiana Maria; Sanches, Joana; Santos, Carla Sousa; Robalo, Joana IsabelActinia equina, the beadlet sea anemone, is a very labile species, displaying variable colour patterns, broad habitat choice and diverse modes of reproduction. Historically, studies using genetic markers such as allozymes and differences in habitat choice lead several authors to propose that different colour morphs could represent different species. One of the species defined was A. fragacea. In this paper, the...
Threatened fishes of the world: Cottus hispaniolensis bacescu-mester, 1964 (cot...
Santos, Carla Sousa; Robalo, Joana Isabel; Pereira, Ana Martins; Doadrio, IgnacioCottus hispaniolensis is a critically endangered cottid fish which is endemic from the Pyrenanean Garonne river basin.
Different stocks of brook lamprey in Spain and their origin from Lampetra fluvi...
Pereira, Ana Martins; Doadrio, Ignacio; Robalo, Joana Isabel; Almada, Vítor CarvalhoUsing the mitochondrial non-coding region I, it was shown that the two Spanish Lampetra planeri populations (Cares–Deva and Olabidea–Ugarana) correspond to different genetic units. The Cares–Deva population is probably a recent offshoot of Lampetra fluviatilis, being the Olabidea–Ugarana population less diverse and of older origin.
Icelandic lampreys (Petromyzon marinus): Where do they come from?
Pereira, Ana Martins; Jonsson, Benony; Johannsson, Magnus; Robalo, Joana Isabel; Almada, Vítor CarvalhoThe recent discovery of sea lamprey wounds on salmonids in Icelandic rivers prompted an investigation on the origin of sea lampreys in Icelandic waters. Using a mitochondrial DNA fragment, the origin of the lampreys examined was assigned to the European stock and not to the North American one.
New distribution data on spanish autochthonous species of freshwater fish
Perea, Silvia; Garzón, Paloma; González, José Luis; Almada, Vítor Carvalho; Pereira, Ana Martins; Doadrio, IgnacioOver the last two years (2008-2010) we performed a monitoring project to update the Spanish freshwater fish fauna. We have collected in 785 sampling localities homogeneously distributed throughout Spain each year. We find as the most important result of this study the occurrence of several species that constitute new records for some rivers or basins in Spain: Lampetra planeri, Petromyzon marinus, Barbus haasi,...
Northern refugia and recent expansion in the North Sea: The case of the wrasse ...
Robalo, Joana Isabel; Castilho, Rita; Francisco, Sara Martins; Almada, Frederico José Oliveira de; Knutsen, Halvor; Jorde, Per ErikPleistocene climate changes have imposed extreme conditions to intertidal rocky marine communities, forcing many species to significant range shifts in their geographical distributions. Phylogeographic analyses based on both mitochondrial and nuclear genetic markers provide a useful approach to unravel phylogeographic patterns and processes of species after this time period, to gain general knowledge of how cli...
Genetic relationships of brook lamprey of the genus Lampetra in a Pyrenean stre...
Pereira, Ana Martins; Almada, Vítor Carvalho; Doadrio, IgnacioThe genetic relationships of a population of brook lamprey Lampetra planeri from Spain were analysed using a fragment of the mitochondrial non-coding region in order to describe its relationships with other European Lampetra populations. DNA sequences were obtained from ten larvae, all corresponding to a single private haplotype. Its closest haplotype differed by five mutations and was found in several samples ...