Fish assemblages in Neotropical reservoirs: Colonization patterns, impacts and management

Agostinho, Ângelo Antônio; Gomes, Luiz Carlos; Santos, Natália Carneiro Lacerda dos; Ortega, Jean C. G.; Pelicice, Fernando Mayer

doi:10.1016/j.fishres.2015.04.006

Cited by 291 publications

(340 citation statements)

References 55 publications

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“…Registered endangered species have rheophilic habits, are migratory (Brycon orbignyanus and Steindachneridion scriptum), and require allochthonous food sources (Brycon orbignyanus and Myloplus tiete) (Machado et al 2008). The construction of dams, therefore, will lead to extreme changes in river habitats, turning rivers into semi-lentic systems, which exerts an intense negative effect on the fish species (Agostinho et al 2016;Pelicice et al 2017).…”

Section: Discussionmentioning

confidence: 99%

“…The electric power installations planned for the basin area would prevent fish access to ideal habitats, thus affecting fish distribution and reproduction and fishing in addition to influencing the basin landscape, causing serious ecosystemic effects (Affonso et al 2015). The nature and intensity of the changes on aquatic biota are highly variable between reservoirs and should be studied on a case-bycase basis (Agostinho et al 2016). However, overall, the dams cause extreme changes in the hydrological regime (Thomaz et al 2004) as well as changes in the longitudinal distribution of fish species (Petry et al 2011).…”

Section: Discussionmentioning

confidence: 99%

“…Knowing the fish species in a river basin is essential for any amount of water and fishery management (Oliveira et al 2014, Agostinho et al 2016. Spatial and temporal fish assemblage patterns can be understood by biotic, abiotic and spatial factors that determine fish assemblage biodiversity (Jackson et al 2001), enabling the assessment of the environmental quality of a river system.…”

Section: Introductionmentioning

confidence: 99%

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Update on the ichthyofauna of the Piquiri River basin, Paraná, Brazil: a conservation priority area

et al. 2018

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Knowledge of the fish species in river basins is among the minimum requirements for the management of water and fish resources. Therefore, the aim of this study was to update the fish species composition of the Piquiri River basin, upper Paraná River basin. Data were gathered from recent information published in specialized literature and records for ichthyology collections. This update reports the occurrence of 152 fish species distributed in 8 orders, 31 families, and 89 genera. Non-native species accounted for 20% of all species, and the construction of the Itaipu Power Plant and its fish ladder were the main vectors of introduction. Three percent of the species were endangered, and 11% were classified as migratory. The Piquiri River basin harbors a large number of species, some of which are rare, endangered, migratory, endemic, and even unknown by science. Because of this, maintaining the integrity of this river basin will support the persistence of regional biodiversity. Keywords: Ichthyofaunal survey, species knowledge, preservation, upper Paraná River basin.Atualização da ictiofauna da bacia do rio Piquiri, Paraná, Brasil: uma área prioritária para conservaçãoResumo: O conhecimento das espécies de peixes existentes em uma bacia hidrográfica é condição mínima necessária para a implantação de qualquer medida de manejo dos recursos hídricos e pesqueiros. Dessa forma, o objetivo deste estudo foi realizar uma atualização da composição das espécies de peixes da bacia do rio Piquiri, sistema do alto rio Paraná, proveniente de recentes informações contidas em estudos divulgados na literatura especializada e registros de espécies depositadas em coleções ictiológicas. A atualização do levantamento ictiofaunístico da bacia do rio Piquiri revelou a ocorrência de 152 espécies, as quais foram distribuídas em oito ordens, 31 famílias e 89 gêneros. Vinte por cento das espécies foram consideradas não nativas. O principal vetor de introdução foi a construção da barragem de Itaipu e seu sistema de transposição. Três por cento das espécies apresentaram alguma ameaça de extinção e 11% foram classificadas como migradoras. A bacia do rio Piquiri comporta grande número de espécies, algumas delas raras, ameaçadas de extinção, migradoras, endêmicas e até mesmo desconhecidas pela ciência. Dessa forma, a manutenção da integridade da bacia promoverá a persistência da biodiversidade regional. Palavras-chave:Levantamento ictiofaunístico, conhecimento das espécies, preservação, bacia do alto rio Paraná.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Update on the ichthyofauna of the Piquiri River basin, Paraná, Brazil: a conservation priority area

et al. 2018

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“…Despite of fish fauna singularities, the high stretches of Iguaçu River basin have been hardly impacted by industrial and urban pollution (Agostinho & Gomes 1997, Yamamoto et al 2016, while hydroelectric dams, constructed in cascades, represent the main threat to fish fauna at the lower Iguaçu River and its tributaries (Agostinho et al 2008(Agostinho et al , 2016. The construction of the low Iguaçu dam at its last segment above the falls (ANEEL 2017), has imminent potential to negative impacts, both on the endemic fishes and on the boundaries of Iguaçu National Park (UNESCO 2012).…”

Section: Introductionmentioning

confidence: 99%

Fish fauna in forested and rural streams from an ecoregion of high endemism, lower Iguaçu River basin, Brazil

et al. 2018

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The fish fauna of eight streams with different land uses of their watersheds (forested and rural areas) in the lower Iguaçu River basin was inventoried, in order to evaluate the composition and species richness. The fishes were sampled quarterly from May 2015 to February 2016, using the electrofishing technique. In total, 4,239 individuals were captured, belonging to six orders, 11 families and 26 species. The orders Siluriformes and Characiformes, and the families Characidae and Trichomycteridae were the most specious. Of the total species sampled, 65% were endemic to the Iguaçu River basin, four are not described and four are non-native. As expected to the Iguaçu River basin, the inventoried fauna revealed low richness and high endemism, however was highly nested within the species composition reported for main channel of Iguaçu River and their larger tributaries. The species recorded here corresponded to a subset of 24.5% of the 106 species documented for the basin. The streams presented different faunas, with only two species (Astyanax bifasciatus and Trichomycterus stawiarski) common to both forested and rural streams. In addition, higher species richness was recorded in streams inserted in conservation units. The presence of non-native species was more frequent in rural streams. These results highlight the importance of the preservation of forested areas in the watersheds of lower Iguaçu, which presents a peculiar fish fauna, along with several threats to biodiversity such as habitat loss by intensive agriculture use.

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“…Human activities such as reservoir construction have caused environmental disturbances and altered aquatic ecosystems, promoting changes in the hydrodynamics and chemical and physical characteristics of river systems, thus influencing the structure of aquatic communities (Simões et al, 2015; Agostinho et al, 2016). In this context, the and N. cf.…”

Section: Introductionmentioning

confidence: 99%

Copepod assemblage structure (Crustacea: Copepoda) along a longitudinal environmental gradient in a tropical river-floodplain system, Brazil

et al. 2017

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Cite as: Palhiarini, W.S. et al. Copepod assemblage structure (Crustacea: Copepoda) along a longitudinal environmental gradient in a tropical river-floodplain system, Brazil. Acta Limnologica Brasiliensia, 2017, vol. 29, e102. Abstract: Aim: In this study, we analyzed the structure of the copepod community along a longitudinal axis of the last undammed stretch of the Upper Paraná River floodplain, downstream of Porto Primavera reservoir. We hypothesized that (i) copepod assemblage would show an increase in the abundance of organisms, species richness and specific diversity with the distance from the Porto Primavera reservoir, due to the arrival of species from adjacent lakes and tributaries; (ii) copepod abundance and species richness would be higher in tributaries and adjacent lakes located at the floodplain, which show higher environmental heterogeneity and function as a species source; and (iii) spatial patterns of copepod assemblage structure are related to the environmental gradient, since copepods show a rapid response to the variation of environmental conditions. Method: Sampling was performed quarterly from August 2013 to July 2014, at the subsurface of the pelagic region. Sampling sites were located along the Paraná River, in seven of its tributaries, and in eight lakes located in its floodplain. Results: We identified 29 species belonging to two families: Cyclopidae (21 species) and Diaptomidae (eight species). On contrary of our first hypothesis, ANOVA results showed a significant decrease in copepod abundance in the downstream direction. Similarly, the tributaries showed higher values of ecological attributes in the upstream stretch. RDA results showed that in axis 1, the Paraná River and the lakes were positively correlated with conductivity, pH, temperature and suspended organic matter, characterized by the most abundant copepod species. The tributaries, on the other hand, were negatively correlated with turbidity, total nitrogen, total phosphorus and depth. Axis 2 showed a positive correlation of the Paraná River with conductivity and suspended organic matter, and a higher abundance of Argyrodiaptomus azevedoi, Notodiaptomus iheringi, N. henseni, N. cearensis 2 Palhiarini, W.S. et al.

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Fish assemblages in Neotropical reservoirs: Colonization patterns, impacts and management

Cited by 291 publications

References 55 publications

Update on the ichthyofauna of the Piquiri River basin, Paraná, Brazil: a conservation priority area

Update on the ichthyofauna of the Piquiri River basin, Paraná, Brazil: a conservation priority area

Fish fauna in forested and rural streams from an ecoregion of high endemism, lower Iguaçu River basin, Brazil

Copepod assemblage structure (Crustacea: Copepoda) along a longitudinal environmental gradient in a tropical river-floodplain system, Brazil

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