Biochemical comparison of two Hypostomus populations (Siluriformes, Loricariidae) from the Atlântico Stream of the upper Paraná River basin, Brazil

Ito, Kennya Fernanda; Renesto, Erasmo; Zawadzki, Cláudio Henrique

doi:10.1590/s1415-47572009000100008

Cited by 8 publications

(2 citation statements)

References 20 publications

(24 reference statements)

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“…1 in the present study was 0.0069, a low value when compared to that observed by Zawadzki et al (2004a) for Neoplecostomus sp. (He = 0.030) and also low in relation to other loricariids from the Paraná-Paraguay River basin ( Zawadzki et al , 2002 , 2004b ; Paiva et al , 2005 ; Renesto et al , 2007 ; Ito et al , 2009 ; Strieder et al , 2009 ). The He for the population of Neoplecostomus sp.…”

Section: Discussionmentioning

confidence: 95%

Allozyme differentiation of two populations of the genus Neoplecostomus Eigenmann & Eigenmann, 1888 (Teleostei, Loricariidae) from the upper Paraná River basin, Brazil

et al. 2011

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Allozyme electrophoresis was used to examine 12 enzymatic systems in two populations of the genus Neoplecostomus from the Paraná River basin. Samples of Neoplecostomus sp. 1 were collected in Paraitinguinha stream of the Tietê River basin, in the municipality of Salesópolis, São Paulo State, and those of Neoplecostomus sp. 2 from São Domingos stream of the Rio Grande River basin, in the municipality of Muzambinho, Minas Gerais State. The genetic variability of the two populations was estimated by Nei’s expected heterozygosity and was considered lower than average for populations of freshwater fish. The proportion of polymorphic loci was low (only 5.26% for the locus Idh). The low frequency of heterozygosity for both populations revealed a high fixation of alleles for each locus. Homozygote excess was observed in both populations. The values of Nei’s genetic identity and the presence of loci with different allele frequencies in both populations may imply that the two populations belong to different species. The genetic variability between populations was compared to other data for loricariids.

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Section: Discussionmentioning

confidence: 95%

Allozyme differentiation of two populations of the genus Neoplecostomus Eigenmann & Eigenmann, 1888 (Teleostei, Loricariidae) from the upper Paraná River basin, Brazil

et al. 2011

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“…Consequently, aspects of fish fidelity to habitat features expressed on more inclusive spatial scales, such as micro-and mesohabitat scales, are underestimated. Although individuals of certain taxa (e.g., Astyanax species) can perform short upstream and downstream migrations (Agostinho et al, 2004), others, such as Hypostomus (Ito et al, 2009) and Isbrueckerichthys, show high site fidelity. In particular, this last one can remain in extremely restricted areas, sometimes less than 10 m 2 (Gerhard, 1999).…”

Section: Sampling Design and Fish Collectionmentioning

confidence: 99%

A multimetric index based on fish fauna for the evaluation of the biotic integrity of streams at a mesohabitat scale

Casatti

Teresa

2013

Acta Limnol. Bras.

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Aim: In this study, we evaluated the ability of the Index of Biotic Integrity (IBI), based on fish fauna, to discriminate between reference streams and degraded streams at a mesohabitat scale. Methods: We sampled the ichthyofauna of 96 mesohabitats (runs, riffles and pools) with electrofishing gear in six streams (three reference and three degraded) of comparable volume, width, and depth. Twelve attributes were tested separately for different mesohabitat types. Results: Ten of the metrics tested were used to obtain the IBI for runs, six for riffles and ten for pools. The IBI indicated poor conditions for runs and riffles and very poor conditions for pools. Conclusions: These results indicate that the IBI may be useful for distinguishing among environments with contrasting conservation status at a mesohabitat scale. Differences were obtained not only in the sets of metrics valid for each mesohabitat but also in the final scores and rankings of the mesohabitat types assessed. These results emphasize the importance of considering the structural and biological variability of aquatic environments to capture the significance of losses of integrity due to human influence.Keywords: ichthyofauna, habitat quality, conservation, IBI, biological monitoring.Resumo: Objetivo: Neste estudo avaliamos se o Índice de Integridade Biótica (IBI) elaborado com base na ictiofauna é capaz de discriminar locais referência dos degradados em uma escala de meso-hábitat. Métodos: A ictiofauna de 96 meso-hábitats (corredores, corredeiras e poços) foi amostrada em seis riachos (três referência e três degradados) de volume, largura e profundidade comparáveis, por meio de pesca elétrica. Doze atributos biológicos foram testados, considerando os meso-hábitats separadamente. Resultados: Dez métricas compuseram o IBI para corredores, seis para corredeiras e dez para poços, indicando condições pobres para corredores e corredeiras e muito pobres para poços. Conclusões: Esses resultados indicam que o IBI aplicado em uma escala de meso-hábitat pode representar uma ferramenta útil para discriminar ambientes em estado de conservação contrastantes. Não somente o conjunto de métricas válidas para cada tipo de meso-hábitat diferiu, mas também o escore final e classificação dos mesohábitats avaliados. Isso destaca a importância de se considerar a variabilidade estrutural e biológica dos ambientes aquáticos para a detecção de perda da integridade causada por interferências antrópicas.Palavras-chave: ictiofauna, qualidade do hábitat, conservação, IBI, monitoramento biológico.

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Molecular inferences about the genus Hypostomus Lacépède, 1803 (Siluriformes: Loricariidae): a review

Mezzomo¹,

Mielniczki-Pereira²,

Sausen³

et al. 2020

Mol Biol Rep

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Biochemical comparison of two Hypostomus populations (Siluriformes, Loricariidae) from the Atlântico Stream of the upper Paraná River basin, Brazil

Cited by 8 publications

References 20 publications

Allozyme differentiation of two populations of the genus Neoplecostomus Eigenmann & Eigenmann, 1888 (Teleostei, Loricariidae) from the upper Paraná River basin, Brazil

Allozyme differentiation of two populations of the genus Neoplecostomus Eigenmann & Eigenmann, 1888 (Teleostei, Loricariidae) from the upper Paraná River basin, Brazil

A multimetric index based on fish fauna for the evaluation of the biotic integrity of streams at a mesohabitat scale

Molecular inferences about the genus Hypostomus Lacépède, 1803 (Siluriformes: Loricariidae): a review

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