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Provedor de dados:  Neotropical Ichthyology
País:  Brazil
Título:  Checklist comparison and dominance patterns of the fish fauna at Taim Wetland, South Brazil
Autores:  Garcia,Alexandre M.
Bemvenuti,Marlise A.
Vieira,João P.
Marques,David M. L. Motta
Burns,Marcelo D. M.
Condini,Mario Vinicius L.
Data:  2006-06-01
Ano:  2006
Palavras-chave:  Subtropical wetland
Neotropical fishes
Ecological Reserve
Invasive species
Patos-Mirim Lagoon complex
Resumo:  Taim Hydrological System is a unique subtropical wetland in southern Brazil harboring an exceptional biological diversity. In 1978, an ecological reserve was established to protect part of this area from increasing anthropogenic impacts in its surroundings. Fishes have been poorly investigated in this system. Based on a multi-gear sampling study encompassing several years (2001-2005), and on comparisons with previous fish inventories, we provide an up-to-date species list of fishes occurring in the Taim Wetland. In addition, we made the first preliminary description of fish dominance patterns found in the main lakes of the system (Flores, Nicola, Jacaré and Mangueira). Checklist comparison resulted in 62 fish species distributed in 24 families, with Characidae (19 species) and Cichlidae (7) showing the highest species richness. Six species are cited for the first time in the reserve: Trachelyopterus lucenai (Auchenipteridae), Hoplosternum littorale (Callichthyidae), Rineloricaria cadeae (Loricariidae), Eigenmannia trilineata (Sternopygidae), Odontesthes mirinensis and O. perugiae (Atherinopsidae). Apparently, the black catfish T. lucenai invaded the system in the last decade and became one of the dominant species in the pelagic waters. Although differences in gears hindered direct comparisons, differences in species composition and dominance patterns between shallow margins and pelagic waters of lakes seem to occur in the lakes. A more diverse assemblage dominated by small fishes (< 5cm) occurred in the protected, vegetated lakes margins. In contrast, an assemblage with lower species richness comprised of larger fishes (> 15 cm) seemed to dominate in pelagic waters.
Tipo:  Info:eu-repo/semantics/article
Idioma:  Inglês
Editor:  Sociedade Brasileira de Ictiologia
Relação:  10.1590/S1679-62252006000200012
Formato:  text/html
Fonte:  Neotropical Ichthyology v.4 n.2 2006
Direitos:  info:eu-repo/semantics/openAccess

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