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Acute toxicity of the water-soluble fraction of diesel in Prochilodus vimboidesKner (Characiformes: Prochilodontidae) Neotropical Ichthyology
Santos,Celina Alcoforado; Lenz,Dominik; Brandão,Geisamanda Pedrini; Chippari-Gomes,Adriana Regina; Gomes,Levy Carvalho.
Diesel oil can be a source of contamination in aquatic environments, mainly as a result of spills. The effects of the water-soluble fraction of diesel (WSF) on Prochilodus vimboideswere assessed. Fish were exposed to three different WSF dilutions for up to 96 h and were compared to a control group. Damages in the fragments of DNA were analyzed using the Comet assay. The presence of erytrocyts abnormalities was assessed by micronucleus test. Aspartate aminotransferase (AST) and alanine aminotransferase (ALT) activity and the accumulation of copper in gills were also analyzed. Fish exposed for 96 h had higher rates of damage than those exposed for 24 h. There was no significant difference regarding the presence of micronuclei between exposed and control fish...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Comet assay; Curimba; Diesel; Micronucleus.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252013000100193
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Effects of manganese on fat snook Centropomus parallelus (Carangaria: Centropomidae) exposed to different temperatures Neotropical Ichthyology
Tuzuki,Bárbara Louise L.; Delunardo,Frederico Augusto C.; Ribeiro,Luciana N.; Melo,Caroliny P. de; Gomes,Levy Carvalho; Chippari-Gomes,Adriana Regina.
ABSTRACT This study evaluates the effects of exposure to manganese (Mn2+) for 96 hours at two different temperatures (24 and 27°C) on juveniles of Centropomus parallelus through the activities of glutathione S-transferase (GST) and catalase (CAT), micronuclei test (MN) and comet assay. The GST activity did not show any significant difference between the groups exposed to Mn2+ and the respective control groups; in contrast, a major increase in the CAT activity was observed at 27°C in the group exposed to Mn2+ compared to the control group. The genotoxic analyses showed that in all animals exposed to Mn2+, the number of red cells with micronuclei increased significantly compared to the respective control groups. There was also a significant increase in the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Biomarkers; DNA damage; Enzymes; Genotoxicity; Metal; Micronuclei.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252017000400202
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Lethal temperatures for Rhamdia quelen larvae (Pimelodidae) Ciência Rural
Chippari-Gomes,Adriana Regina; Gomes,Levy Carvalho; Baldisserotto,Bernardo.
The lower and upper lethal temperatures (LT50) of R. quelen larvae were determined. The larvae were obtained from two spawning periods with hatching temperatures of 21 and 26ºC respectively. Larvae were placed in tanks at which the temperatures were either increased 1ºC every 15min, or reduced 1ºC every 20min until larval movement ceased. This temperature was then maintained for 96h. Minimum mortality (29.0 ± 1.5%) was observed in the larvae held at hatching temperatures. The lower LT50 were 15.01 and 16.72ºC, and the upper LT50 were 29.25 and 27.83ºC for the larvae hatching at 21 and 26ºC, respectively. Thus, apparently there is no difference with relation to temperature change tolerance between larvae hatched in both temperatures.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Rhamdia quelen; Larvae; Lethal temperatures; Hatching; Silver catfish.
Ano: 2000 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782000000600026
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