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Registros recuperados: 11 | |
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Pacheco,Andreza C. G.; Albrecht,Míriam P.; Caramaschi,Érica P.. |
Pachyurus schomburgkii Günther, 1860 e P. paucirastrus Aguilera, 1983 ocorrem na bacia Tocantins-Araguaia, sendo a segunda endêmica da bacia. Ambas foram encontradas na região do alto Tocantins, onde este foi represado pela usina hidrelétrica Serra da Mesa, tendo sido capturadas somente em dois de 14 pontos amostrados, sendo ambos (FU e PG) a jusante da barragem. Os peixes foram amostrados bimestralmente com redes de espera padronizadas entre dezembro de 1995 e dezembro de 2002. São apresentados dados de distribuição, dieta, condição fisiológica e estado reprodutivo das duas espécies, focando possíveis modificações em decorrência da instalação da barragem. A maioria dos indivíduos capturados eram adultos e o número de reprodutivos diminuiu após o... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Pachyurus; Biologia; Dieta; Represamento; Rio Tocantins. |
Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212008000200017 |
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Teixeira,Gabriel E.; Bialetzki,Andréa; Soares,Bruno E.; Souza,Guilherme; Caramaschi,Érica P.. |
ABSTRACT The Paraíba do Sul River is affected by extensive water collection for supply, organic and industrial pollution, and dams. Nonetheless, the ichthyofauna maintains biodiversity and sustains artisanal fisheries. This study analyzes the composition, abundance and distribution of fish larvae, an important approach to determine the reproductive period and spawning sites. The sampling occurred from August 2011 through February 2013 in five sites at a transect between the banks on the lower reach of the Paraíba do Sul River. A total of 5,412 larvae belonging to 20 taxa was captured. The predominant order was Characiformes. Larvae of Prochilodus spp. and Leporinus spp. were the most abundant; larvae of Brycon insignis, an endangered species, were present.... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Drought; Eggs and larvae; Migratory species; Reproductive period; Spawning area. |
Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252019000500208 |
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Soares,Bruno E.; Rosa,Daniela C. O.; Silva,Nathália C. S.; Albrecht,Miriam P.; Caramaschi,Érica P.. |
ABSTRACT Fishes of the order Gymnotiformes have high diversity of oral and head morphology, which suggests trophic specializations within each clade. The aim of this study was to describe resource use patterns by two fish species (Gymnorhamphichthys rondoni and Gymnotus coropinae) in the National Forest Saracá-Taquera, Oriximiná - Pará, analyzing microhabitat use, diet composition, feeding strategies, niche breadth and niche overlap. Stomach contents of 101 individuals (41 G. rondoni and 60 G. coropinae), sampled in 23 headwater streams were analyzed and volume of food items was quantified to characterize their feeding ecology. Gymnorhamphichthys rondoni was captured mainly on sandy bottoms, whereas G. coropinae in crevices. Both species had a... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Amazon; Diet overlap; Feeding; Microhabitat; Streams. |
Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252017000200204 |
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Netto-Ferreira,André L.; Albrecht,Míriam P.; Nessimian,Jorge L.; Caramaschi,Érica P.. |
The silver hatchetfish Thoracocharax stellatus is one of the approximately 200 fish species recorded for the upper rio Tocantins, in the region where it was impounded by the Serra da Mesa hydroelectric dam. Analysis of the stomach contents of 88 specimens revealed a diet consisting almost entirely of insects (99.6%), most of which were terrestrial (87.6%). Ants, beetles, and mayflies were the main food items. Dawn and dusk seemed to be the periods of highest foraging activity for T. stellatus. As a specialist on terrestrial insects, this species has a close connection with the region near the river bank, where prey is provided from the associated riparian vegetation. Despite the impoundment and depletion of the land-water ecotone observed in later stages... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Hatchetfishes; Autoecology; Diet; Tocantins-Araguaia basin. |
Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252007000100009 |
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Santos,Alexandre Clistenes de A.; Caramaschi,Érica P.. |
The rio Santo Antônio is a perennial lowland stream in the Brazilian semi-arid region, and is the main tributary of the upper rio Paraguaçu, an important drainage of the Chapada Diamantina. The temporal variation of the fish composition and abundance in a stretch of the middle course of the river was evaluated. Sampling was carried out monthly between August 1998 and July 1999, using standardized gear and techniques. Data on water and air temperature, water transparency, maximum and mean depth, width and area of the channel, and flow were recorded on each fish sampling occasion. Univariate and multivariate statistical analyses were employed in order to detect significant temporal differences in environmental parameters and fish abundance. Temperature,... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Chapada Diamantina; Ichthyofauna; Richness; Seasonality. |
Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252011000100014 |
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Aranha,José Marcelo R.; Caramaschi,Érica P.; Caramaschi,Ulisses. |
Patterns of spatial occupation, feeding, and reproductive period of two species, Corydoras aeneus and Corydoras gr. carlae (Siluroidei, Callichthyidae), coexistents in the Alambari River (Botucatu, São Paulo), were studied. High diet overlap, partial spatial segregation, and well differentiated reproductive strategies were verified. These findings do not permit to evidence the occurrence of competitive interactions between the analysed species. |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Siluroidei; Callichthyidae; Spatial occupation; Feeding; Reproductive period. |
Ano: 1993 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751993000300013 |
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Registros recuperados: 11 | |
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