Fishes in first order stream in Ivaí River drainage basin, upper Paraná River Basin, Paraná state, Brazil

Araújo, Maria Isabel de; Delariva, Rosilene Luciana; Bonato, Karine Orlandi; Silva, Jislaine Cristina da

doi:10.15560/11023

Cited by 17 publications

(21 citation statements)

References 21 publications

(22 reference statements)

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“…The highest richness of the Siluriformes and Characiformes, as well as the families Characidae and Loricariidae, is a common observation in streams in the Neotropics (Lowe-McConnell 1999, Shibatta et al 2002, Buckup et al 2007Langeani et al 2007), and corroborates studies in small streams in other basins of the Paraná State (Galves et al 2007, Cunico et al 2009Gubiani et al 2010, Araújo et al 2011, Pagotto et al 2012, Delariva & Silva 2013. However, for the lower Iguaçu River, were registered 11 Astyanax spp., popularly known as "lambari", of which eight species are endemic, and two possibly endemic to this basin ( Baumgartner et al 2012).…”

Section: Discussionsupporting

confidence: 67%

“…can be considered high, especially if evaluated some issues: (i) the number of species recorded for other water bodies with similar size in the Neotropics (Bertaco 2009, Couto & Aquino 2011, Marceniuk et al 2011, Oyakawa & Menezes 2011, Cetra et al 2012, Daga et al 2012, as well in other streams in the Paraná State (Araújo et al 2011, Delariva & Silva 2013, Gubiani et al 2010; (ii) the proportion of species registered herein represents 37.7% of the total number of species recorded for the Iguaçu River basin (106 spp. ), including those observed in the main channel of the river .…”

Section: Discussionmentioning

confidence: 94%

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Ichthyofauna of streams from the lower Iguaçu River basin, Paraná State, Brazil

et al. 2016

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Abstract:The drainages of the Iguaçu River basin, as well as the main channel of the river, have peculiar characteristics resulting from geomorphological processes in this area, including the formation of the Iguaçu River Falls. This slope in the lower portion of the basin is a biogeographical barrier to many organisms. In this study was inventoried the fish fauna of streams of the lower Iguaçu River basin, evaluating possible differences in the species composition upstream and downstream of this biogeographical barrier. Sampling were conducted between 2004 and 2013, in five streams, three upstream and two downstream of the Iguaçu River Falls, using electrofishing. The nMDS analysis was run to investigate possible groupings of similar fauna between the streams sampled. The scores of this test were tested as to the significance of groupings with the Hotelling T 2 test. The indicator value method (IndVal) was used to detect the distribution of species among the groups of the streams upstream and downstream of the Iguaçu River Falls. We collected 18,908 individuals of six orders, 11 families, and 40 species. Siluriformes and Characiformes had the highest species richness; Cyprinodontiformes presented the highest abundance. Considering the species recorded, 21 are considered natives to the Iguaçu River basin, including 15 endemic, wich were found only in streams upstream of the falls. Additional 18 species were verified only in the streams downstream of such barrier. Four species were common to both stretches. The axis 1 of the nMDS separated two groups: streams upstream (S1, S2 and S3) and streams downstream of the Iguaçu River Falls (S4 and S5). The indicator species analysis also indicated a distinction between the groups of streams, that were significantly different (Hotelling's T 2 = 234.36, p ˂ 0.0001). The number of endemic species in the streams upstream of the Falls (15 spp.) evidences a significant effect of isolation promoted by the Iguaçu River Falls, and confirms the role of this barrier in the vicariant processes and endemism typical of this basin. These results emphasize the importance of conserving these ecosystems, once the extinction of species in this region means the irreversible loss of them. Resumo: As drenagens da bacia do rio Iguaçu, bem como o canal principal do rio, possuem características peculiares resultantes de processos geomorfológicos dessa área, incluindo a formação das Cataratas do rio Iguaçu. Esse desnível na porção inferior da bacia constitui uma barreira biogeográfica para muitos organismos. Neste trabalho inventariamos a fauna de peixes de riachos na porção do baixo rio Iguaçu, avaliando possíveis diferenças na composição de espécies acima e abaixo dessa barreira biogeográfica. Entre 2004 e 2013, foram amostrados cinco riachos, sendo três localizados acima das Cataratas do Iguaçu e dois abaixo, por meio de pesca elétrica. Para investigar possíveis padrões de agrupamentos de fauna similares entre os riachos amostrados foi

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Section: Discussionsupporting

confidence: 67%

Section: Discussionmentioning

confidence: 94%

Ichthyofauna of streams from the lower Iguaçu River basin, Paraná State, Brazil

et al. 2016

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“…2 and Trichomycterus sp. 3 in the studies of Maier et al (2008), Araújo et al (2011), Delariva & Silva (2013 and Viana et al (2013), which are deposited in the fish collection of Nupélia, were re-examined and identified as Trichomycterus davisi (Haseman, 1911). In addition, some species recorded in the collections analysed were re-examined and identifications were rectified, namely: Hypostomus aspilogaster (Cope, 1894) is Hypostomus ancistroides (Ihering, 1911) Thomaz et al (2015) and Hisonotus insperatus Britski & Garavello, 2003 and H. oliveirai to Curculionichthys by Roxo et al (2015).…”

Section: Fish Identificationmentioning

confidence: 99%

“…There are only few surveys on fish fauna in the Ivaí River basin, especially for the tributaries, Barra Bonita River (Maier et al 2008), Bonito River (Viana et al 2013), some streams located in the Perobas Biological Reserve (Delariva & Silva 2013) and a first-order stream in the municipality of Marialva (Araújo et al 2011); and there are few genetic studies with some species of Loricariidae (Zawadzki et al 2004, Portela-Castro et al 2007, Paiva et al 2013 or ecological studies (Luiz et al 2003, Luiz et al 2005) and description of new species (Graça & Pavanelli 2008, Roxo et al 2014, Tencatt et al 2014, Zawadzki et al 2016) with fish of this basin.…”

Section: Introductionmentioning

confidence: 99%

Inventory of the fish fauna from Ivaí River basin, Paraná State, Brazil

et al. 2016

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Abstract:We compiled data on fish fauna of the Ivaí River basin from recent specialised literature, standardised sampling and records of species deposited in fish collections. There were 118 fish species of eight orders and 29 families. Of these, 100 species are autochthonous (84.8%), 13, allochthonous (11.0%) and five, exotic (4.2%). The main causes for the occurrence of non-native species are escapes from aquaculture, introduction for fishing purposes and the construction of the Itaipu hydroelectric plant. The predominance of small and medium-sized Characiformes and Siluriformes, including 13 species new to science, accounts for approximately 11.0% of all species and 13.0% of all native species. About 10.2% of all species and 12.0% of all native species are endemic to the upper stretch of the Ivaí River, isolated by numerous waterfalls in tributary rivers and streams. The Ivaí River basin is subjected to various anthropogenic interferences such as pollution, eutrophication, siltation, construction of dams, flood control, fisheries, species introduction and release of fingerlings. These activities raise concerns about biodiversity of Brazilian inland waters especially regarding the fish fauna; the basin of the Ivaí River already has species classified in categories of extinction risk: Brycon nattereri and Apareiodon vladii (Vulnerable) and Characidium heirmostigmata and Steindachneridion scriptum (Endangered). The high species richness of native fish, endemism of some, high environmental heterogeneity, high risk of extinction and lack of knowledge of several other species along with the eminent human activities raise the need to enrich the scientific knowledge for future conservation efforts for the studied basin. Resumo: Nós compilamos dados sobre a diversidade da ictiofauna da bacia do rio Ivaí proveniente de recentes informações contidas em estudos divulgados na literatura especializada, coletas padronizadas e registros das espécies depositadas em coleções ictiológicas. Foram registradas 118 espécies de peixes pertencentes a oito ordens e 29 famílias. Dessas, 100 são autóctones, (84.8%), 13 são alóctones (11.0%) e cinco são exóticas (4.2%). As principais causas da ocorrência de espécies não nativas são escapes da piscicultura, introduções para pesca e a construção da usina hidrelétrica de Itaipu. Ocorre o predomínio de espécies de Characiformes e Siluriformes com porte pequeno e médio, sendo que 13 espécies são novas, o que representa aproximadamente 11.0% do total de espécies e 13.0% do total de espécies nativas. Ainda, aproximadamente 10.2% do total de espécies e 12.0% do total de espécies nativas correspondem a espécies endêmicas, isoladas pela presença de inúmeras cachoeiras em rios e riachos afluentes no trecho superior do rio Ivaí. A bacia do rio Ivaí está sujeita a uma variedade de interferências antrópicas como poluição, eutrofização, assoreamento, construção de represas, controle do regime de cheias, pesca, introduções de espécies e soltura de alevinos. Tais atividades apontam alarmantes preocupaçõe...

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“…The small rivers in this basin are quite heterogeneous, with distinct geomorphological and hydrological features (Leli et al, 2010;Parolin et al, 2010;Araújo et al, 2011). This heterogeneity contributes to the presence of a peculiar and endemic fish fauna (Maier et al, 2008), as in the Itiz stream, a rural stream that supports a high abundance of native species (Araújo et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

Food-resource partitioning among fish species from a first-order stream in northwestern Paraná, Brazil

2012

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This study addressed the feeding ecology of fish fauna from a first-order stream located in a rural area. The purposes were to evaluate the influence of interspecific, seasonal and spatial factors on the diet, examine the dietary overlap, and determine the predominant food sources. Sampling was conducted in December 2007, September 2008, and March 2009, in three 50-m stretches of Itiz stream (upstream, intermediate, and downstream), through electrofishing. A total of 1,102 stomach contents were analyzed from 14 species, by the volumetric method. In general, allochthonous resources were predominant in the diets. Astyanax aff. fasciatus, Astyanax aff. paranae, Astyanax bockmanni, and Bryconamericus aff. iheringi consumed a higher proportion of plant remains, and Bryconamericus stramineus consumed predominantly Hymenoptera. The diets of Cetopsorhamdia iheringi, Characidium aff. zebra, Imparfinis schubarti, and Trichomycterus sp. consisted of aquatic insects, especially immature forms of Trichoptera, Ephemeroptera, Plecoptera, and Diptera. Hypostomus ancistroides, Hisonotus sp., Poecilia reticulata, and Rineloricaria aff. pentamaculata exploited mainly detritus, while Rhamdia quelen used a variety of items, predominantly terrestrial insects. Detrended Correspondence Analysis (DCA) showed a clear distinction among the species, with different morphology and feeding tactics. The Multi-Response Permutation Procedure (MRPP) supported this differentiation, and also indicated significant spatial and temporal variations in the dietary composition; the Indicator Value Method (IndVal) indicated the main items that contributed to these differences. The diet overlap among species was low (< 0.4) to around 78% of pairs, and the mean value did not vary significantly among the sites or between hydrological periods within each site. According to the null model of Pianka's index, the values for dietary overlap were significantly higher than expected at random, showing evidence of resource sharing. This was related to the availability of allochthonous resources, highlighting the importance of riparian vegetation as a source of these resources for maintaining the fish fauna of the stream.Este estudo abordou a ecologia alimentar da ictiofauna de um riacho de primeira ordem situado em área rural. Os objetivos foram verificar a influência dos fatores interespecíficos, sazonais e espaciais sobre a dieta, avaliar a sobreposição alimentar, além de determinar os recursos alimentares predominantes. As amostragens foram realizadas em dezembro/2007, setembro/ 2008 e março/2009, em três pontos do riacho Itiz (montante, intermediário e foz) com extensões de 50 m, através de pesca elétrica. Foram analisados 1102 conteúdos estomacais referentes a 14 espécies de acordo com o método volumétrico. De forma geral observou-se que a maior contribuição na dieta das espécies foi de recursos alóctones. Astyanax aff. fasciatus, Astyanax aff. paranae, Astyanax bockmanni, Bryconamericus aff. iheringi, consumiram maior proporção de vegetal e Bryconamericus stram...

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Fishes in first order stream in Ivaí River drainage basin, upper Paraná River Basin, Paraná state, Brazil

Cited by 17 publications

References 21 publications

Ichthyofauna of streams from the lower Iguaçu River basin, Paraná State, Brazil

Ichthyofauna of streams from the lower Iguaçu River basin, Paraná State, Brazil

Inventory of the fish fauna from Ivaí River basin, Paraná State, Brazil

Food-resource partitioning among fish species from a first-order stream in northwestern Paraná, Brazil

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