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| Mise,Fabio Teruo; Tencatt,Luiz Fernando Caserta; Souza,Fagner de. |
| Morphological and genetic evidences suggest that Rhamdia branneri and Rhamdia voulezi, currently considered synonymous of Rhamdia quelen, are in fact two valid species. Furthermore, in the taxonomic revision of R. quelen, no exemplars from the Iguaçu River were examined, which makes the synonymy doubtful. Considering the two species as valid, it was hypothesized that R. branneri and R. voulezi have ecomorphological differences, with the objective to verify if they can be considered ecologically distinct. Ecomorphological characterization was conducted using ecomorphological indices. For statistical analysis, a Principal Component Analysis (PCA), a Multiresponse Permutation Procedure (MRPP), and a Discriminant Analysis (DA) were performed. The ordination... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Endemism; Heptapteridae; Rhamdia voulezi; Rhamdia branneri; Rhamdia quelen; Ecomorphology. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032013000400099 |
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| Becker,Alexssandro Geferson; Cunha,Mauro Alves da; Garcia,Luciano de Oliveira; Zeppenfeld,Carla Cristina; Parodi,Thaylise Vey; Maldaner,Graciela; Morel,Ademir Farias; Baldisserotto,Bernardo. |
| This study evaluated extracts of Condalia buxifolia as anesthetics for the silver catfish Rhamdia quelen. The effectiveness of eugenol and of the methanolic extract (ME) of C. buxifolia during the transport of this species was also assessed. Fish of two different weights (1.50±0.02 g and 165.70±22.50 g) were transferred to aquaria containing water with the C. buxifolia ME or with fractions obtained from the ME, such as the n-hexane, dichloromethane, ethyl acetate, n-butane and aqueous fractions, at concentrations from 0-300 °L L-1. The C. buxifolia ME in the 0.5-120 °L L-1range caused only light sedation, and the fractions did not have an effect on the fish. In the second experiment, another group of fish was transported for 12 h in 15 plastic bags. The... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Anesthesia; Fish transport; Heptapteridae; Ion fluxes; Sedative. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252013000300675 |
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| Cavalheiro,Laísa Wociechoski; Fialho,Clarice Bernhardt. |
| Abstract: The ichthyofauna of streams in the Neotropical region is not yet fully known. This study aims to investigate the ichthyofauna composition of six streams of the Ijuí River sub-basin, Rio Grande do Sul State, inserted in the Uruguay River basin, as to contribute to the knowledge of fishes species richness and distribution in the south of Brazil. Sampling was carried out between July 2015 and May 2016, bimonthly, using the technique of electric fishing to collect the fishes. Spatial variations (per sampled stream) in the ichthyofauna composition were tested with a permutational multivariate analysis of variance. In total, we collected 5,029 individuals from 55 species, 13 families and five orders. From these species, 17 are endemic to the Uruguay... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Abundance; Characidae; Heptapteridae; Loricariidae; Richness; Uruguay River basin. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032020000100302 |
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