Taxonomia E Filogenia De Peixes De Riachos Brasileiros

Abstract

The fish fauna occurring in Brazilian small streams comprises 36 families of teleost freshwater fishes. The systematics and phylogenetic knowledge about this fauna greatly expanded during the last two decades, but is still very heterogeneous. For some taxonomic groups there are taxonomic identification keys and well-documented phylogenetic hypotheses, while other groups are mostly comprised by poorly known species. The increase in the knowledge of Neotropical fish diversity was associated with the significant growth of hypotheses about their evolution and contributed to the understanding of the phylogenetic history of fish comunities and their structure in small streams.

Taxonomic and functional diversity patterns of stream fish assemblages from Brazilian Atlantic Rain Forest

“…In theory, complex systems are more stable, so maintenance of complexity is related to species richness (MacArthur, 1955). Unfortunately, stream fishes are not important for inland fisheries, given the small size and low biomass produced, although they represent about 50% of Brazilian freshwater fish biodiversity (Buckup, 2021). Maintaining fish biodiversity in higher elevation basins will be reflected in rivers and reservoirs further down river basins (Vannote et al, 1980).…”

Avanços Em Métodos De Coleta De Peixes E Caracterização De Habitat De Riachos Tropicais

“…Como em qualquer outra área das Ciências Naturais, amostragens em ambientes de água doce de pequeno porte representam um desafio para a caracterização de sua biota, incluindo os peixes. Apesar de abrigar alta diversidade de espécies (Buckup 2021), riachos tropicais estão entre os ecossistemas mais ameaçados do mundo (Dudgeon et al 2006), e ainda são menos estudados que riachos temperados (Winemiller et al 2008). A diversidade de ambientes aos quais nos referimos como "riachos" impõe cuidados para que sejam adequadamente amostrados.…”