Browsing by Author "Brito, A."
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- Atlantic reef fish biogeography and evolutionPublication . Floeter, S. R.; Rocha, L. A.; Robertson, D. R.; Joyeux, J. C.; Smith-Vaniz, W. F.; Wirtz, Peter; Edwards, A. J.; Barreiros, João P.; Ferreira, C. E. L.; Gasparini, João L.; Brito, A.; Falcón, J. M.; Bowen, B. W.; Bernardi, G.AIM: To understand why and when areas of endemism (provinces) of the tropical Atlantic Ocean were formed, how they relate to each other, and what processes have contributed to faunal enrichment. RESULTS: Phylogenetic (proportion of sister species) and distributional (number of shared species) patterns are generally concordant with recognized biogeographical provinces in the Atlantic. The highly uneven distribution of species in certain genera appears to be related to their origin, with highest species richness in areas with the greatest phylogenetic depth. Diversity buildup in Atlantic reef fishes involved (1) diversification within each province, (2) isolation as a result of biogeographical barriers, and (3) stochastic accretion by means of dispersal between provinces. The timing of divergence events is not concordant among taxonomic groups. The three soft (non-terrestrial) inter-regional barriers (mid-Atlantic, Amazon, and Benguela) clearly act as ‘filters’ by restricting dispersal but at the same time allowing occasional crossings that apparently lead to the establishment of new populations and species. Fluctuations in the effectiveness of the filters, combined with ecological differences among provinces, apparently provide a mechanism for much of the recent diversification of reef fishes in the Atlantic.
- New and confirmed records of fishes from the Cabo Verde archipelago based on photographic and genetic dataPublication . Freitas, Rui; Falcón, J. M.; González, José A.; Burnett, K. A.; Dureuil, M.; Caruso, J. H.; Hoving, H. J. T.; Brito, A.In recent decades the Cabo Verde ichthyofauna has been studied more extensively, and nowadays photo-recording is employed as a valuable asset under special caution and consideration. Four species reported here are new records for Cabo Verde: Carlarius sp., sea catfish; Serranus cabrilla, comber; Branchiostegus semifasciatus, African tilefish and Lutjanus dentatus, African coastal snapper. The presence in Cabo Verde of Glaucostegus cemiculus, blackchin guitarfish, Elops senegalensis, Senegalese ladyfish, Lophius spp., bathydemersal monkfishes, Rachycentron canadum, cobia, Pagrus auriga, African seabream, Lutjanus dentatus, African coastal snapper and Mugil cephalus, mullet, was re-confirmed by photo-records. Squalus megalops, cosmopolitan spurdog, was identified by genetic fingerprinting. The two littoral species, P. auriga and M. cephalus, are firmly established in the archipelago and additional information on their occurrence is given. The findings reported in the present contribution may well be the result of a wider sharing of information between fishermen and other seafarers and scientists, rather than an indicator of recent faunal changes.