Encontrados 14 documentos, a visualizar página 1 de 2
Unexpected high genetic diversity at the extreme northern geographic limit of T...
Almada, Vítor Carvalho; Almada, Frederico; 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...
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,...
Female reproductive tactics in a sex-role reversed pipefish: scanning for male ...
Silva, K.; Almada, Vítor Carvalho; Vieira, Maria Natividade; Monteiro, Nuno MiguelTheoretical studies predict that females should invest in current reproduction according to both the expected payoffs from mating with different-quality males and their future mating prospects. The Syngnathidae family, with its male pregnancy together with the occurrence of varying degrees of sex-role reversal, constitutes an exceptional model to study female allocation strategies. The present work tests for th...
Spread of the alien bleak Alburnus alburnus (Linnaeus, 1758) (Actinopterygii cy...
Vinyoles, Dolors; Robalo, Joana Isabel; Sostoa, Adolf de; Almodóvar, Ana María; Elvira, Benigno; Nicola, Graciela G.; Fernández-Delgado, CarlosSince its first record in a tributary of the Ebro basin in 1992, the bleak Alburnus alburnus has spread to almost the whole Iberian Peninsula. In this paper (based on electrofishing surveys in 598 localities), we provide information on the expansion of the bleak. We detail current distribution in the Ebro basin and the rivers of the Eastern Pyrenees and we report its presence in three other major Iberian draina...
Reproductive behaviour of the black-striped pipefish Syngnathus abaster (Pisces...
Silva, K.; Monteiro, Nuno Miguel; Vieira, Maria Natividade; Almada, Vítor CarvalhoThe reproductive behaviour of Syngnathus abaster is described and compared with those of other syngnathids. The need for standardized behavioural data is discussed in light of the actual theories of evolution of mating patterns and sex-role reversal within this family.
New species of the genus Chondrostoma agassis, 1832 (Actynopterigii, cyprinidae...
Robalo, Joana Isabel; Almada, Vítor Carvalho; Santos, Carla Sousa; Moreira, Maria Inês Vasconcelos de Albergaria Pinheiro; Doadrio, IgnacioInexistente
Molecular validation of the specific status of Parablennius sanguinolentus and ...
Almada, Frederico; Almada, Vítor Carvalho; Domingues, Vera dos Santos; Brito, Alberto; Santos, Ricardo SerrãoParablennius sanguinolentus and P. parvicornis have been classified as either two distinct species or as two sub-species depending on the different criteria used to classify them. An analysis of fragments of mitochondrial 12S and 16S rDNA showed that the genetic distance between samples of P. sanguinolentus and P. parvicornis is similar or higher than those found for other blenniids that are widely recognized a...
On the phylogenetic affinities of Centrolabrus trutta and Centrolabrus caeruleu...
Almada, Vítor Carvalho; Almada, Frederico; Henriques, Miguel; Santos, Ricardo Serrão; Brito, AlbertoPhylogenetic analysis of partial 12S and 16S mitochondrial rDNA regions, together with meristic and ethological data, has revealed that Centrolabrus trutta (Lowe, 1833), a species occurring in the Canaries and Madeira, and its close relative Centrolabrus caeruleus (Azevedo, 1999) from the Azores, are more closely related to most species of the genus Symphodus than to Centrolabrus exoletus (Linnaeus, 1758). Unde...
Embryonic and larval development of Lipophrys pholis (Pisces: Blenniidae)
Faria, Cláudia Barreiros Macedo de; Borges, Rita Alexandra; Gil, Fátima; Almada, Vítor Carvalho; Gonçalves, Emanuel JoãoInformation on the early ontogeny of Lipophrys pholis is scattered and incomplete. In this paper we describe for the first time the full developmental sequence from egg to juvenile in controlled conditions. In addition, some notes on the spawning behaviour of adults and the behaviour of larvae are provided. During oviposition, the female follows the male´s path, suggesting that the male may apply sperm on the n...
A checklist of the blennioid fishes (Teleostei, Blennioidei) occurring in Portu...
Oliveira, Rui Filipe; Almada, Vítor Carvalho; Almeida, Armando J.; Santos, Ricardo Serrão; Gonçalves, Emanuel JoãoTwenty species of blennioide fishes have been cited from Portuguese waters. A survey of the published literature and personal observations by the authors allowed to confirm the presence of eighteen species: Clinitrachus argentatus, Labrisomus nuchipinnis, Tripterygion delaisi, Blennius ocellaris, Coryphoblennius galerita. Lipophrys canevae, L. dalmatinus, L. pholis, L. trigloides, Parablennius gattorugine, P. p...
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