Results 171 to 180 of about 562 (191)
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Histological alterations in gills of Astyanax aff. bimaculatus caused by acute exposition to zinc
Experimental and Toxicologic Pathology, 2012Increasing contamination of aquatic ecosystems by metals has caused various morphological, physiological and biochemical changes in aquatic organisms, and the gills of fish are recognized as indicators of environmental quality. In this context, the present work proposed to study the effects of different concentrations of zinc (Zn) in the histology of ...
Daiane Cristina Marques, dos Santos +3 more
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Animal Reproduction Science
Environmental enrichment is used to provide well-being to the animals, such as fish, in captive conditions, mimicking their natural habitat. It may influence fish behavior, physiology, and survival. In terms of reproduction, however, the relationship between environment enrichment and successful reproduction in captivity is still poorly explored in ...
Bianca Lima, de Sousa +12 more
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Environmental enrichment is used to provide well-being to the animals, such as fish, in captive conditions, mimicking their natural habitat. It may influence fish behavior, physiology, and survival. In terms of reproduction, however, the relationship between environment enrichment and successful reproduction in captivity is still poorly explored in ...
Bianca Lima, de Sousa +12 more
openaire +2 more sources
Comparative Biochemistry and Physiology Part C: Toxicology & Pharmacology, 2013
We investigated the effects of acidic pH and acute aluminum (Al) exposure on the metabolic substrates of Astyanax bimaculatus, and on the ability of these animals to recover in clean water. After an acclimation period, sexually mature A. bimaculatus females were sorted into six glass aquaria with three experimental groups: control in neutral pH (7.0 ...
Vanessa A R O, Vieira +2 more
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We investigated the effects of acidic pH and acute aluminum (Al) exposure on the metabolic substrates of Astyanax bimaculatus, and on the ability of these animals to recover in clean water. After an acclimation period, sexually mature A. bimaculatus females were sorted into six glass aquaria with three experimental groups: control in neutral pH (7.0 ...
Vanessa A R O, Vieira +2 more
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Zebrafish
Using integrative tools can be effective for species identification, especially in complex groups like Astyanax. Astyanax bimaculatus group is composed of six valid species, including A. lacustris. "A. altiparanae", "A. asuncionensis", and "A. jacuhiensis" are considered as junior synonyms of A. lacustris. Seeking to test the operational taxonomic unit
Mariane Gavazzoni +7 more
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Using integrative tools can be effective for species identification, especially in complex groups like Astyanax. Astyanax bimaculatus group is composed of six valid species, including A. lacustris. "A. altiparanae", "A. asuncionensis", and "A. jacuhiensis" are considered as junior synonyms of A. lacustris. Seeking to test the operational taxonomic unit
Mariane Gavazzoni +7 more
openaire +2 more sources
Heat Resistance and Thermal Acclimation Rate in Tropical Tetra Astyanax bimaculatus of Venezuela
Environmental Biology of Fishes, 2000Venezuelan river tetra, Astyanax bimaculatus juveniles of 34.1–36.7 mm standard length and 0.83–1.0 g wet weight were acclimated for four weeks to 24–33°C, which are approximate average minimum and maximum river temperatures throughout the year. The fish acclimated to 24, 27, 30, and 33°C were exposed for 10 000 minutes at 35, 36, 37, 38, and 39°C to ...
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Acta Histochemica, 2015
Endocrine cells secrete hormones through the mucosa of the gastrointestinal tract (GIT) and act on the overall regulation of digestive processes such as nutrient absorption, gut motility and intestinal blood flow. This study aimed to determine regional distribution and frequency of endocrine cells secretory of serotonin (5-HT), somatostatin (SST) and ...
Nathália das Neves, Cardoso +5 more
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Endocrine cells secrete hormones through the mucosa of the gastrointestinal tract (GIT) and act on the overall regulation of digestive processes such as nutrient absorption, gut motility and intestinal blood flow. This study aimed to determine regional distribution and frequency of endocrine cells secretory of serotonin (5-HT), somatostatin (SST) and ...
Nathália das Neves, Cardoso +5 more
openaire +2 more sources
Zebrafish, 2018
Abstract Astyanax bimaculatus , a ubiquitous species in many Neotropical basins, is characterized by a complex taxonomy and are currently considered a species complex. The goal of this study was to analyze 31 populations ( N = 136) of this species from ...
Marina S, Cunha +5 more
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Abstract Astyanax bimaculatus , a ubiquitous species in many Neotropical basins, is characterized by a complex taxonomy and are currently considered a species complex. The goal of this study was to analyze 31 populations ( N = 136) of this species from ...
Marina S, Cunha +5 more
openaire +2 more sources
Zebrafish, 2018
Astyanax is a species-rich polyphyletic genus distributed between the southern United States and central Argentina. The genus contains groups of cryptic species, which are difficult to distinguish, and are sometimes identified wrongly. Basic and molecular cytogenetic analyses were run on Astyanax abramis and three junior synonyms of Astyanax lacustris:
Mariane, Gavazzoni +5 more
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Astyanax is a species-rich polyphyletic genus distributed between the southern United States and central Argentina. The genus contains groups of cryptic species, which are difficult to distinguish, and are sometimes identified wrongly. Basic and molecular cytogenetic analyses were run on Astyanax abramis and three junior synonyms of Astyanax lacustris:
Mariane, Gavazzoni +5 more
openaire +2 more sources