Freshwater fish richness baseline from the São Francisco Interbasin Water Transfer Project in the Brazilian Semiarid

Silva, Márcio J.; Ramos, Telton Pedro Anselmo; Carvalho, Fernando Rogério; Brito, Marcelo Fulgêncio Guedes; Ramos, Robson T. C.; Rosa, Ricardo S.; Sánchez-Botero, Jorge Iván; Novaes, José Luís Costa; Costa, Rodrigo Silva da; Lima, Sérgio M. Q.

doi:10.1590/1982-0224-2020-0063

Cited by 7 publications

(6 citation statements)

References 39 publications

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“…In this study, we did not find evidences of troglomorphism in any fish specimen, therefore, all species recorded in the subterranean environments were considered as non-troglomorphic (Trajano, 2012). However, we recorded 64.1% of the ichthyofauna of the Apodi-Mossoró river occurring in habitats associated with caves or in caves (Silva et al, 2020). The most representative order was Characiformes, with six families, 14 genera and species (56% of the total), followed by Cichliformes with one family, four genera and species (16% of the total).…”

Section: Resultsmentioning

confidence: 56%

“…The Bom Sucesso and Carmo tributary rivers compose the Apodi-Mossoró river basin (Fig. 1), which is one of the main basins of the Mid-Northeastern Caatinga freshwater ecoregion (MNCE) and receiver of the SFRIWT (Silva et al, 2020). The Apodi-Mossoró river basin is characterized by an intermittent hydrological regime, and an area of 14,278 km².…”

Section: Study Areamentioning

confidence: 99%

“…The Apodi-Mossoró river basin is characterized by an intermittent hydrological regime, and an area of 14,278 km². Its headwaters and estuary are in the RN, crossing the state from south to north, including most of the limestone outcrops of the Jandaíra Formation (Silva et al, 2020).…”

Section: Study Areamentioning

confidence: 99%

“…The semiarid climate influences the small and medium-sized drainages of the Caatinga, the main hydrological effect is the intermittent regime (Lima et al, 2017). Although threatened by human activities, such as the introduction of exotic species and modifications in the water flow (e.g., the São Francisco interbasin water transfer project, SFRIWT) (Berbel-Filho et al, 2016), little is known about the ecological and demographic dynamics of the Caatinga's fishes, as well as their potential use of subterranean habitats as refuge areas in the dry season (Silva et al, 2020).…”

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Diversity and conservation of fishes from karstic areas of the Jandaíra Formation in the Brazilian semiarid

et al. 2023

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Few studies have focused on non-troglomorphic fishes occurring in Brazilian caves, especially those in the Caatinga region. The present study is the first survey of fishes from karstic areas of the Jandaíra Formation in Rio Grande do Norte State, northeastern Brazil. This region is characterized by a high concentration of caves and a rich subterranean biodiversity, especially of troglobitic invertebrates, but remains considered a gap on the knowledge of the subterranean ichthyofauna in Brazil. Four field expeditions were carried out covering two dry and two rainy seasons, in 2018 and 2019, in 23 localities in small river basins along the western part of the Jandaíra Formation. A total of 829 fish specimens, none of them troglomorphic, was captured and identified as belonging to 25 species of 12 families and five orders. Amongst them, four species are endemic of the Mid-Northeastern Caatinga ecoregion, and two non-native species were recorded. Habitats were classified into three categories: superficial, associated to cave, and cave. Although no troglomorphic fish species was found in this study, we recorded 64.1% of the Apodi-Mossoró river ichthyofauna occurring in caves or associated to caves, corroborating the hypothesis that part of the ichthyofauna exploits these environments as a refuge during the dry season. In addition, we suggest conservation policies for the maintenance of subterranean and aquatic semiarid ecosystems in the Jandaira formation, which is currently under threat due to anthropogenic activities, such as mining and deforestation.

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Section: Resultsmentioning

confidence: 56%

Section: Study Areamentioning

confidence: 99%

Section: Study Areamentioning

confidence: 99%

mentioning

confidence: 99%

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Diversity and conservation of fishes from karstic areas of the Jandaíra Formation in the Brazilian semiarid

et al. 2023

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“…Estudo recente, com inventário atualizado das espécies, em quatro diferentes bacias hidrográficas com inúmeros riachos intermitentes como afluentes (bacias dos rios Jaguaribe (CE), Apodi-Mossoró (RN), Piranhas-Açu (RN) e Paraíba do Norte (PB)) registrou 13 espécies endêmicas [Apareiodon davisi (Characiformes, Parodontidae), Cheirodon jaguaribensis (Characiformes, Characidae), Corydoras sp. (Siluriformes, Callichthyidae), Hypostomus sertanejo, Parotocinclus spilurus, P. seridoenses, P. spilosoma (todas Siluriformes, Loricariidae), Pimelodella dorseyi, P. enochi (ambas Siluriformes, Heptapteridae), Cynolebias microphthalmus, Hypsolebias antenori (ambas Cyprinodontiformes, Rivulidae)] e potencialmente ameaçadas por esse empreendimento (Silva et al 2020). Monitoramento é necessário para acompanhar os impactos desse empreendimento sobre a ictiofauna dos riachos intermitentes.…”

Section: Legislação Brasileiraunclassified

Ecologia De Peixes De Riachos Intermitentes

et al. 2021

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The ecology of fish from intermittent streams in the Brazilian semi-arid region is still little known. In the past twenty years, the number of researchers dedicated to this topic has increased considerably. However, significant gaps still exist when compared to the perennial streams of other regions of Brazil. Questions that address seasonal variations come up against the determination of capture methods and techniques that are efficient in the different phases of the hydrological cycle. In addition, techniques widely used in perennial systems, such as electrofishing, in most cases, have not been effective. Aspects related to biology, physiology, behavior, functional and taxonomic ecology of fish still need to be investigated taking into account seasonal and spatial scale variations. In view of the growing transformation imposed on the Brazilian semi-arid region by the extensive use of natural resources and by climate change, aquatic environments and their biodiversity are threatened by the transformation of riparian vegetation, the sewage release, the species introduction, the modification of its course and artificial perennialization. Thus, we will present and discuss, in this paper, the studies developed on the ecology of fish in the intermittent streams of the Brazilian semi-arid region and the gaps and challenges to be faced by future research.

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