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Ictiofauna de igarapés de terra firme: estrutura das comunidades de duas bacias...
Mendonça, Fernando PereiraNa Amazônia Central, pequenos riachos de águas ácidas e pobres em nutrientes constituem uma densa rede hídrica. Contudo, pouco é conhecido sobre a riqueza e abundância de sua ictiofauna. Para determinar a composição ictiofaunística das bacias hidrográficas existentes na Reserva Florestal Adolfo Ducke, Manaus-AM, determinar a independência das mesmas como unidades de manejo, bem como determinar quais fatores est...
Effects of isolation and environmental variables on fish community structure in...
Barros, Daniela de França; Albernaz, Ana Luísa Kerti Mangabeira; Zuanon, Jansen; Espírito-Santo, Helder Mateus Viana; Mendonça, Fernando PereiraDue to the existence of terrestrial barriers to freshwater fish dispersion, it is believed that its distribution is strongly associated with historical factors related to the formation of the habitats they occupy. By the other hand, some studies reveal the influence of abiotic conditions (such as size of water bodies, pH, conductivity) on the composition of fish fauna occurring in small streams. This study aime...
Fallen leaves on the water-bed: Diurnal camouflage of three night active fish s...
Sazima, Ivan; Carvalho, Lucélia Nobre; Mendonça, Fernando Pereira; Zuanon, JansenResemblance to dead leaves is a well known type of camouflage recorded for several small vertebrates that dwell in the leaf and root litter on the ground. We present here instances of such resemblance in three species of nocturnal fishes (Siluriformes and Gymnotiformes) that spend the daytime among submersed root-tangle with leaf litter in Amazonian streams. All three species are very difficult to spot visually...
Trends in studies of Brazilian stream fish assemblages
Dias, Murilo Sversut; Zuanon, Jansen; Couto, Thiago B. A.; Carvalho, Marla S.; Carvalho, Lucélia Nobre; Espírito-Santo, Helder Mateus VianaStudies about fish assemblages in Brazilian streams have grown in recent years, however, it remains unclear whether this increase is followed by increments in the diversity of addressed topics and theoretical frameworks adopted by researchers. We performed a systematic search for Brazilian studies on stream fish assemblages recording study region, publication year, objectives, and spatial and temporal scales ad...
Rare species contribute disproportionately to the functional structure of speci...
Leitão, Rafael Pereira; Zuanon, Jansen; Vill?ger, S?bastien; Williams, Stephen E.; Baraloto, Christopher; Fortunel, Claire; Mendonça, Fernando PereiraThere is broad consensus that the diversity of functional traits within species assemblages drives several ecological processes. It is also widely recognized that rare species are the first to become extinct following human-induced disturbances. Surprisingly, however, the functional importance of rare species is still poorly understood, particularly in tropical species-rich assemblages where the majority of spe...