Checklist of the fishes from Jamari River basin, in areas under influence of dams, Rondônia, Brazil

Oliveira, Rianne Caroline de; Deprá, Gabriel de Carvalho; Zawadzki, Cláudio Henrique; Silva, João Carlos Barbosa da; Graça, Weferson Júnio da

doi:10.1590/1676-0611-bn-2019-0803

Cited by 5 publications

(6 citation statements)

References 39 publications

(52 reference statements)

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“…However, the Samuel Dam flooded the Samuel waterfall, suppressing the stretches of rapids on this tributary. The last taxonomic survey in this basin registered 230 fish species (Oliveira, Deprá, Zawadzki, Silva, & Graça, 2020). It is also important to consider that downstream from the Samuel Dam, a free‐flowing tributary, the Candeias River, flows into the left bank of the Jamari River.…”

Section: Methodsmentioning

confidence: 99%

Dams in the Amazon: The importance of maintaining free‐flowing tributaries for fish reproduction

Vasconcelos

Alves

Câmara³

et al. 2020

Aquatic Conservation

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Free‐flowing tributaries are important for the maintenance of fish diversity in dammed systems. In relation to the reproduction of fish species, the role of a free‐flowing tributary was evaluated and compared with that of a dammed tributary downstream of large dams in the Madeira River, one of the main tributaries of the Amazon River. Two hypotheses were tested: (i) the densities of the ichthyoplankton differ between the dammed and the free‐flowing tributaries; and (ii) the free‐flowing tributary contributes a greater diversity of fish larvae species to the assemblage structure of the main stem than the dammed tributary. Fish eggs and larvae were sampled at five sites: one in each tributary (Jamari – dammed – and Machado – free‐flowing) and three in the main stem (Madeira River), upstream and downstream from the mouth of each tributary. Fitted Bayesian models showed that the densities both of eggs and larvae were more than twice as high in the free‐flowing tributary than in the dammed tributary. The results also indicated that the free‐flowing tributary makes a major contribution to the fish assemblage structure of the Madeira River, whereas the dammed tributary does not have a significant influence on the main stem assemblage structure. The results demonstrate the importance of conservation and maintenance not only of the Machado River but also of other free‐flowing tributaries in dammed basins, especially those basins with high biodiversity, such as the Amazon. Moreover, this study helps inform the decision‐making process regarding the location of new dams, which is critical in fish diversity conservation.

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Section: Methodsmentioning

confidence: 99%

Dams in the Amazon: The importance of maintaining free‐flowing tributaries for fish reproduction

Vasconcelos

Alves

Câmara³

et al. 2020

Aquatic Conservation

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“…Studies focusing the Amazonian ichthyofaunal diversity are mostly concentrated next to urban areas (e.g., Ferreira et al, 1998;Santos et al, 2006;Mendonça et al, 2005), Conservation Units (cf., Camargo & Giarrizzo, 2007;Oliveira et al, 2020Pedroza et al, 2012Vieira et al, 2016;Costa et al, 2017), in the floodplains (cf., Lowe-McConnell, 1999) or in large rivers (Mérona et al, 2004;Queiroz et al, 2013a;Ohara et al, 2017). In addition, some studies have been mentioned high endemism of fish species in Amazon areas at altitudes ranging 500-800 m at Chapada dos Parecis (Ohara & Lima, 2015;Dagosta & de Pinna, 2019), or at Serra do Cachimbo (Birindelli et al, 2009), with the description of new species of restricted distribution.…”

Section: Discussionmentioning

confidence: 99%

“…This region is also the type locality of many recently described fish species (Fisch-Müller et al, 2005;Wingert & Malabarba, 2011;Ohara & Lima, 2015;Ohara & Marinho, 2016;Bockmann & Reis, 2021;Marinho et al, 2021). The majority of these species seem to have very restricted distribution, since they were not recorded during previous surveys in the Rio Machado basin (e.g., Perin et al, 2007;Casatti et al, 2013;Costa et al, 2017), in other rivers of the Rio Madeira basin (e.g., Rapp Py-Daniel et al, 2007;Araújo et al, 2009;Pedroza et al, 2012;Queiroz et al, 2013a, b;Vieira et al, 2016;Anjos et al, 2019;Oliveira et al, 2020), or in neighboring drainages (Ohara & Loeb, 2016;Ohara et al, 2017). A similar pattern with restricted species has also been mentioned to the Chapada dos Parecis, regarding small fishes from the upper Rio Machado/Guaporé (Rio Madeira basin), upper Rio Juruena (Rio Tapajós basin), and upper Rio Paraguai (Ohara & Lima, 2015).…”

Section: Introductionmentioning

confidence: 93%

“…Most of this ichthyofaunal diversity is located within the Amazon basin, where more than 2,400 valid fish species are included (Reis et al, 2016;Jézéquel et al, 2020). In the Rio Madeira, the largest tributary of the Rio Amazonas, about 1,000 fish species are registered (Queiroz et al, 2013a based on collecting efforts concentrated on the Brazilian territory, in the lower and middle portions of the basin and its main tributaries (Rapp Py-Daniel et al, 2007;Perin et al, 2007;Camargo & Giarrizzo, 2007;Pedroza et al, 2012;Queiroz et al, 2013a, b;Costa et al, 2017;Anjos et al, 2019;Oliveira et al, 2020). However, the fish fauna of moderate altitude from headwaters of main rivers of Rondônia State remains practically unknown.…”

Section: Introductionmentioning

confidence: 99%

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Fish fauna of moderate altitude from first order stream in upper Rio Machado, Rondônia, Brazil

Loeb

Ohara

2022

Pap. Avulsos Zool.

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This study represents an inventory of fish collected in a first order tributary of the Igarapé Piracolina at Chapada dos Parecis, upper Rio Machado drainage, Rio Madeira basin, Vilhena, Rondônia, Brazil. The sampled stream is located in moderate altitudes (570-590) m above sea level and it is the type locality of five recently described species. Through fieldwork carried out in four fieldtrips between 2014 and 2015, 966 specimens were captured belonging to 18 species, distributed in nine families and four orders. Most of these species have a restricted distribution in the upper Rio Machado. Characidae was the most representative family both in number of species and specimens. One species is recognized as new and endemic to the region, and belong to the genus Pyrrhulina (Lebiasinidae), while five other species (Ancistrus verecundus, Bryconops piracolina, Hyphessobrycon lucenorum, Moenkhausia cambacica, and M. parecis) are also possibly endemic to the upper Rio Machado basin. In this scenario, our results provide relevant data for the establishment of guiding policies, management decisions and bases for conservation actions in moderate altitude areas of the Amazon basin.

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“…Many of these species were previously referred to as G. surinamensis Bloch, 1791 ( Regan, 1906 ), but currently these species are part of the G. surinamensis complex (except G. argyrostictus ) which contains an undetermined number of undescribed species distributed in the Orinoco and Amazon basins ( López-Fernández & Taphorn, 2004 ). Several putative species of Geophagus have been proposed for the Amazon basin as well ( López-Fernández & Taphorn, 2004 ; Ohara et al, 2017 ; Oliveira et al, 2020 ).…”

Section: Introductionmentioning

confidence: 99%

Mapping the hidden diversity of the Geophagus sensu stricto species group (Cichlidae: Geophagini) from the Amazon basin

Ximenes

Bittencourt

Machado

et al. 2021

PeerJ

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South American freshwater ichthyofauna is taxonomically the most diverse on the planet, yet its diversity is still vastly underestimated. The Amazon basin alone holds more than half of this diversity. The evidence of this underestimation comes from the backlog of morphologically distinct, yet undescribed forms deposited in museum collections, and from DNA-based inventories which consistently identify large numbers of divergent lineages within even well-studied species groups. In the present study, we investigated lineage diversity within the Geophagus sensu stricto species group. To achieve these objectives, we analyzed 337 individuals sampled from 77 locations within and outside the Amazon basin representing 10 nominal and six morphologically distinct but undescribed species. We sequenced the mitochondrial cytochrome c oxidase subunit I (COI) and delimited lineages using four different single-locus species discovery methods (mPTP-15 lineages; LocMin-14 lineages; bGMYC-18 lineages; and GMYC-30 lineages). The six morphologically distinct but undescribed species were also delimited by the majority of the species discovery methods. Five of these lineages are restricted to a single collection site or a watershed and their habitats are threatened by human activities such as deforestation, agricultural activities and construction of hydroelectric plants. Our results also highlight the importance of combining DNA and morphological data in biodiversity assessment studies especially in taxonomically diverse tropical biotas.

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Checklist of the fishes from Jamari River basin, in areas under influence of dams, Rondônia, Brazil

Cited by 5 publications

References 39 publications

Dams in the Amazon: The importance of maintaining free‐flowing tributaries for fish reproduction

Dams in the Amazon: The importance of maintaining free‐flowing tributaries for fish reproduction

Fish fauna of moderate altitude from first order stream in upper Rio Machado, Rondônia, Brazil

Mapping the hidden diversity of the Geophagus sensu stricto species group (Cichlidae: Geophagini) from the Amazon basin

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