Biota Neotropicahttps://www.scielo.br/journal/bn/feed/2024-02-16T20:16:10.545000ZVol. 24 No. 1 - 2024WerkzeugAmphibians and reptiles of the Refúgio Biológico Bela Vista – Itaipu Dam, state of Paraná, southern Brazil10.1590/1676-0611-BN-2023-15262024-02-16T20:16:10.545000Z2020-08-09T06:48:14.233000ZVicente-Ferreira, Gabriel S.do Nascimento, Eloize F.Batista, Camila S.Kardush, Tarik A.Reyes, Kathia L.B.Garey, Michel V.
<em>Vicente-Ferreira, Gabriel S.</em>;
<em>Do Nascimento, Eloize F.</em>;
<em>Batista, Camila S.</em>;
<em>Kardush, Tarik A.</em>;
<em>Reyes, Kathia L.b.</em>;
<em>Garey, Michel V.</em>;
<br/><br/>
Abstract Information regarding species occurrence is fundamental to understanding biodiversity distribution. However, the biodiversity from the west of the state of Paraná has been historically less studied, especially amphibians and reptiles. For this reason, we present the first reptile list of species from the west of the state of Paraná and extend the current list of anurans for the municipality of Foz do Iguaçu. The species list was based on a systematic field study conducted at Refúgio Biológico Bela Vista (RBV) a conservation area within the Hydroelectric Power Itaipu Binacional. We integrated the species list with previous species observations available in the literature for the same place where our sampling was conducted. A total of 41 species of amphibians and reptiles are presented. All amphibians species found were recorded in the field; however, from the 22 species of reptiles recorded, three were historical records obtained before this study. Species were all classified as Least Concern and/or had stable populational status according to the IUCN. Sampling sufficiency was achieved for anurans but not for reptiles, probably due to low abundance of several snake species. The most abundant species of anuran was Dendropsophus nanus, from the Hylidae family, whereas Leptodactylus plaumanni and Scinax squalirostris were represented by only one individual each. The lizard Salvator merianae was the most abundant reptile, and seven species were represented by only one individual each. The most successful sampling method for adult anurans was active search in water bodies whereas most of reptile species were observed by accidental encounters and not through a systematic sampling method. We found that herpetofauna composition from RBV was similar to other communities from Paraná state that also occur within the Semideciduous Seasonal Forest. Finally, as additional information to the species list, we offer species identification keys and discuss the importance of Refúgio Biológico Bela Vista to harbor the anuran and reptile diversity of the region.Fishes from affluents of Rio Branco, Municipality of Caracaraí, Roraima State, northern Brazil10.1590/1676-0611-BN-2023-15332024-02-16T20:16:10.545000Z2020-08-09T06:48:14.233000ZLopez, Giovanna Guimarães SilvaCetra, MauricioMattox, George Mendes Taliaferro
<em>Lopez, Giovanna Guimarães Silva</em>;
<em>Cetra, Mauricio</em>;
<em>Mattox, George Mendes Taliaferro</em>;
<br/><br/>
Abstract The Amazon has the richest freshwater ichthyofauna of the planet, with tens of new species being described annually. Although studies on Amazonian fish in the literature are increasingly common recently, there are still significant gaps concerning primary data on the ichthyofauna. One such gap is the state of Roraima and its main drainage, Rio Branco. There is a single book published in 2007 on fishes of Rio Branco, and although it presents a rather complete list of over 580 species known until then, the information is now a little outdated and many species found in some of its affluents are not listed in the book. Due to the scarcity of published data on the fish diversity of Roraima and taking into account that ichthyofaunal surveys are important tools towards freshwater conservation, we carried out an inventory of the ichthyofauna in the region of Caracaraí (RR) in 18 sampling sites including seven affluents of both left and right margins of Rio Branco. We recorded a total of 64 species of 41 genera and 18 families of five orders that occur in the Neotropical region, representing more than 11% of the species previously registered in the book for the entire Rio Branco basin. Twelve species were added to the list presented in the book, with four representing first records for the basin, one of them a new record for Brazil. Two of the 64 species are putative new taxa in need of further taxonomic studies. The order with the highest diversity was Characiformes (40 species), with highlights for the family Characidae (24 of these species), followed by Cichliformes (11 species) and Siluriformes (9 species). The richest collecting sites had 23 species, and the least rich site had only two species. Hyphessobrycon bentosi and Nannostomus marginatus occurred in more than 60% of the sites. There has been a significant difference in the exclusive ichthyofauna from affluents of both margins of Rio Branco, with the number of exclusive species in left margin tributaries approximately five times higher. Results presented herein complement data from the literature regarding the still poorly known ichthyofauna from Roraima.