Fish of the Taiassuí and Benfica river basins, Benevides, Pará (Brazil)

Abstract

Species inventories are relatively efficient and inexpensive tools for the monitoring of biodiversity, especially in areas that have suffered high rates of deforestation, such as the municipalities located within the “Belém Endemism Center”. This region extends from northeastern Pará to northern Maranhão and has a unique flora and fauna, but is threatened by high rates of deforestation and habitat fragmentation since it is included in the so-called “Arc of Deforestation”. Benevides is the third most impacted municipality within the metropolitan region of Belém (Pará), after Belém itself and Santa Bárbara, but the biological diversity of its freshwater fish fauna is still unknown. In the present study, 81 fish species belonging to seven orders and 23 families were identified. Characidae and Cichlidae were the families with the largest numbers of species in the Taiassuí and Benfica river basins. Two of the species – Apistogramma tucurui and Hyphessobrycon inconstans – were recorded in the state for the first time. Based on the composition analysis of the fishes, it is possible to said that the Benevides fish community is relatively well preserved, because it has high diversity of groups.

Stream ichthyofauna of the Tapajós National Forest, Pará, Brazil

“…Angermeier and Karr 1983; Arbeláez 2004; Baumgartner et al 2006; Arbeláez 2008; Scarabotti et al 2011; Pedroza et al 2012; Raiol et al 2012; Claro-García and Shibatta 2013; Volcan et al 2013, Ramos et al 2014). Characiformes is one of the largest orders of fishes with at least 2000 valid species (Eschmeyer 2015).…”

“…Most noteworthy are those aimed at surveying the ichthyofauna (e.g. De Oliveira et al 2009; Barros et al 2011; Raiol et al 2012; Pedroza et al 2012), studies with focus on ecology that have tested the influence of environmental factors on the assemblage structure (e.g. Mendonça et al 2005; Espirito-Santo et al 2008; Dias et al 2009), studies on natural history (e.g.…”

Ichthyofauna of the Ribeirão Frutal and tributaries, upper Rio Paraná basin, Minas Gerais, Southeastern Brazil

“…Consequently, these studies may result in new discoveries (e.g., undescribed species) and can be implemented as the basis for conservation actions (e.g., Castro et al 2004, Serra et al 2007, Raiol et al 2012, Ohara & Loeb 2016, Silva-Oliveira et al 2016, Melo et al 2016, Ferreira et al 2017.…”

New species of Pyrrhulina (Teleostei: Characiformes: Lebiasinidae) from the eastern Amazon, Pará, Brazil

“…That said, the characters discussed by Netto-Ferreira, Marinho (2013) -(i.e., the reduction of the number of precaudal vertebrae; the presence of 9 caudal-fin principal rays on the upper lobe; the absence of postcleithrum 2; and the lack of filamentous rays on dorsal) suggest that P. australis may share a closer relationship with other small species of Pyrrhulina, such as P. marilynae, P. vittata and P. zigzag. Specimens of Pyrrhulina capim have been commonly identified as Pyrrhulina brevis in the literature (Montag et al, 2008;Raiol et al, 2012;Silva-Oliveira et al, 2016;Ferreira et al, 2018) and in many collections. Such identifications seem to have been induced by the broad definition of the Pyrrhulina brevis-group proposed by Géry (1977).…”