Abstract
This research aims to describe the ichthyological fauna in the area surrounding the Taiamã Ecological Station in the state of Mato Grosso, Brazil. Three expeditions were carried out, in September 2014, February 2015 and May/2015, in seasons ranging from the hydrological conditions of high waters (flood), low waters (drought), and decreasing waters (ebbing). During the research we sampled 3,664 individuals from six orders, 28 families and 78 species. Characiformes was the most abundant order (̴ 81 % of individuals), followed by Siluriformes (̴ 13 % of individuals), and Gymnotiformes (̴ 4 % of individuals). The most representative species were Moenkhausia dichroura (Kner, 1858), Serrapinus calliurus (Boulenger, 1900), Odontostilbe pequira (Steindachner, 1882) and Pimelodella gracilis (Valenciennes, 1840). The dry period showed the highest abundance (1,541 individuals), richness (61 species), diversity (H’ = 2.69) and equitability (J’ = 0.65). These results fill a gap concerning species composition in the Pantanal, mainly referring to data available on Conservation Unit, and its surroundings. Moreover, this research provides a database to update the checklist of fish species in a remote wetland, offering a tool for management and conservation. Data published through GBIF (Doi: 10.15470/jjpuuu)
Highlights
The Pantanal is an extensive plain composed of a series of periodically flooded landscape units (Pozer and Nogueira, 2004), and covering a range of approximately 140,000 km2 in the Midwest of Brazil (Da Silva et al, 2001; Lourenço et al, 2008)
Specimens were conserved in 70 % alcohol (and deposited in the Laboratory of Ichthyology of the Northern Pantanal (LIPAN), linked to the Research Centre in Limnology, Biodiversity and Ethnobiology of the Pantanal (CELBE/UNEMAT)
The order Characiformes was the most abundant (2,970 individuals, ̴ 81 % of the total), followed by Siluriformes (477 individual, ̴ 13 % of the total), Gymnotiformes (138 individuals, ̴ 4 % of the total), Cichliformes, Beloniformes and Synbranchiformes
Summary
The Pantanal is an extensive plain composed of a series of periodically flooded landscape units (Pozer and Nogueira, 2004), and covering a range of approximately 140,000 km in the Midwest of Brazil (Da Silva et al, 2001; Lourenço et al, 2008). Within this area, 11,555 ha belong to the Taiamã Ecological Station (TES), delimited by the Paraguay River and containing a variety of aquatic environments.
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