Results 131 to 140 of about 311 (149)
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Archives of Environmental Contamination and Toxicology, 2007
The present study evaluated the effect of waterborne Cd in eggs and larvae of silver catfish, Rhamdia quelen, at two alkalinity levels (63 and 92 mg . L(-1) CaCO(3)): 0.5 (control), 4.5, 8, and 18 microg . L(-1) Cd. The fertilization rate was similar in all treatments, but the number of eggs with irregular surface was significantly higher in those ...
Ana Paula S, Benaduce +4 more
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The present study evaluated the effect of waterborne Cd in eggs and larvae of silver catfish, Rhamdia quelen, at two alkalinity levels (63 and 92 mg . L(-1) CaCO(3)): 0.5 (control), 4.5, 8, and 18 microg . L(-1) Cd. The fertilization rate was similar in all treatments, but the number of eggs with irregular surface was significantly higher in those ...
Ana Paula S, Benaduce +4 more
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Ecological Modelling, 2017
Abstract It is well known that the early life cycle stages of fishes are highly sensitive to chemical exposure. However, little is known about the effects of pollutants on the other life stages, due the difficulty of experimental/empirical approaches.
Izabella de Andrade Brito +3 more
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Abstract It is well known that the early life cycle stages of fishes are highly sensitive to chemical exposure. However, little is known about the effects of pollutants on the other life stages, due the difficulty of experimental/empirical approaches.
Izabella de Andrade Brito +3 more
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Zootaxa, 2020
Mastiglanis is a genus of heptapterid catfish represented by two valid species. These freshwater species are widely distributed along the Amazon, Orinoco, and Maroni River basins. However, a taxonomic review of specimens collected in the Putumayo and Nanay rivers, Amazon River basin in Peru revealed a new species of Mastiglanis.
DARIO R. FAUSTINO-FUSTER, HERNÁN ORTEGA
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Mastiglanis is a genus of heptapterid catfish represented by two valid species. These freshwater species are widely distributed along the Amazon, Orinoco, and Maroni River basins. However, a taxonomic review of specimens collected in the Putumayo and Nanay rivers, Amazon River basin in Peru revealed a new species of Mastiglanis.
DARIO R. FAUSTINO-FUSTER, HERNÁN ORTEGA
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Two new species of Heptapterus (Siluriformes: Heptapteridae) from the Uruguay River basin, Brazil
Journal of Fish Biology, 2019As part of an ongoing taxonomic revision of the genus Heptapterus from the Laguna dos Patos and Uruguay River drainages and Atlantic coastal streams of southern Brazil and Uruguay, two new species closely related to Heptapterus mustelinus were identified. Both species are endemic to small tributaries of the Uruguay River.
Dario R. Faustino‐Fuster +2 more
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Reviews in Fish Biology and Fisheries, 2011
The Heptapteridae family is endemic to the Neotropics and is one of the most representative members of the Siluriformes order in small bodies of water. Due the lack of data for clearly distinguishing their species, only recently was elevated from condition of subfamily to family. However, many doubts about certain species remain yet.
de Borba, Rafael Splendore +4 more
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The Heptapteridae family is endemic to the Neotropics and is one of the most representative members of the Siluriformes order in small bodies of water. Due the lack of data for clearly distinguishing their species, only recently was elevated from condition of subfamily to family. However, many doubts about certain species remain yet.
de Borba, Rafael Splendore +4 more
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Zootaxa
Azevedo-Santos, Valter M., Souto-Santos, Igor C. A., Baskin, Jonathan N., Deprá, Gabriel C., Katz, Axel M. (2025): On the type material of two Heptapteridae species (Siluriformes) originally deposited in a deactivated collection in Brazil. Zootaxa 5696 (1): 133-141, DOI: 10.11646/zootaxa.5696.1.9, URL: https://doi.org/10.11646/zootaxa.5696.1 ...
VALTER M. AZEVEDO-SANTOS +4 more
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Azevedo-Santos, Valter M., Souto-Santos, Igor C. A., Baskin, Jonathan N., Deprá, Gabriel C., Katz, Axel M. (2025): On the type material of two Heptapteridae species (Siluriformes) originally deposited in a deactivated collection in Brazil. Zootaxa 5696 (1): 133-141, DOI: 10.11646/zootaxa.5696.1.9, URL: https://doi.org/10.11646/zootaxa.5696.1 ...
VALTER M. AZEVEDO-SANTOS +4 more
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Zygote, 2009
SummaryThe developmental stages for the embryonic and larval periods of the silver catfish (Rhamdia quelen) kept at different temperatures (21, 24, 27 and 30°C) are described. Fish were analysed under light and scanning electron microscopy. For embryonic development, we described 25 stages, which were grouped into seven periods named zygote, cleavage ...
Alana Marielle, Rodrigues-Galdino +6 more
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SummaryThe developmental stages for the embryonic and larval periods of the silver catfish (Rhamdia quelen) kept at different temperatures (21, 24, 27 and 30°C) are described. Fish were analysed under light and scanning electron microscopy. For embryonic development, we described 25 stages, which were grouped into seven periods named zygote, cleavage ...
Alana Marielle, Rodrigues-Galdino +6 more
openaire +2 more sources