Effects of methylmercury on electric organ discharges in the weak electric fish Gymnotus sylvius
Autor(a) principal: | |
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Data de Publicação: | 2013 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.3922/j.psns.2013.1.18 http://hdl.handle.net/11449/75917 |
Resumo: | Methylmercury (MeHg) is present in the environment because of natural and anthropogenic causes. MeHg can reach the central nervous system (CNS) and cause neurological damage in humans and animals. Electric organ discharges (EODs) in the weak electric fish Gymnotus sylvius are produced by the electric organ and modulated by the CNS. These discharges are used for electrolocation and communication. The purpose of the present study was to investigate the effects of dietary MeHg exposure on EOD rate in G. sylvius. An oscilloscope was used to record the EOD rate. Two treatments were investigated: chronic MeHg administration (4 μg/kg MeHg every 2 days, with a total of nine dietary exposures to MeHg) and acute MeHg administration (a single dose of 20 μg/kg MeHg). The control data for both treatments were collected every 2 days for 18 days, with a total of nine sessions (day 1 until day 18). Data of fish exposed to MeHg were collected every 2 days, totaling nine sessions (day 19 until day 36). Chronic treatment significantly increased the EOD rate in G. sylvius (p<.05), especially with the final treatment (day 32 until day 36). Acute treatment resulted in an initial increase in the EOD rate, which was maintained midway through the experiment (day 26 until day 30 p<.05). The present study provides the first insights into the effects of MeHg on EODs in weak electric fish. The EOD rate is a novel response of the fish to MeHg administration. |
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Effects of methylmercury on electric organ discharges in the weak electric fish Gymnotus sylviusElectric organ discharge (EOD)ElectroreceptionMethylmercuryNovel responsemethylmercuryanimal experimentchromosome analysiscontrolled studyelectric fishelectric organexposureGymnotus sylviusnonhumanorgan dischargeoscilloscopesecretion (process)Methylmercury (MeHg) is present in the environment because of natural and anthropogenic causes. MeHg can reach the central nervous system (CNS) and cause neurological damage in humans and animals. Electric organ discharges (EODs) in the weak electric fish Gymnotus sylvius are produced by the electric organ and modulated by the CNS. These discharges are used for electrolocation and communication. The purpose of the present study was to investigate the effects of dietary MeHg exposure on EOD rate in G. sylvius. An oscilloscope was used to record the EOD rate. Two treatments were investigated: chronic MeHg administration (4 μg/kg MeHg every 2 days, with a total of nine dietary exposures to MeHg) and acute MeHg administration (a single dose of 20 μg/kg MeHg). The control data for both treatments were collected every 2 days for 18 days, with a total of nine sessions (day 1 until day 18). Data of fish exposed to MeHg were collected every 2 days, totaling nine sessions (day 19 until day 36). Chronic treatment significantly increased the EOD rate in G. sylvius (p<.05), especially with the final treatment (day 32 until day 36). Acute treatment resulted in an initial increase in the EOD rate, which was maintained midway through the experiment (day 26 until day 30 p<.05). The present study provides the first insights into the effects of MeHg on EODs in weak electric fish. The EOD rate is a novel response of the fish to MeHg administration.Universidade Federal de São Carlos, São Carlos, São PauloUniversidade Federal do Pará, Belém, ParáUniversidade de São Paulo, Butantã, São PauloUniversidade Estadual Paulista, Bauru, São PauloUniversidade Federal de São Carlos Departamento de Genética e Evolução, São Carlos, São PauloUniversidade Federal do Pará Núcleo de Teoria e Pesquisa do Comportamento, Belém, ParáUniversidade de São Paulo Instituto de Psicologia, Butantã, SPUniversidade Estadual Paulista Departamento de Engenharia Elétrica, Bauru, São PauloUniversidade Estadual Paulista Departamento de Ciências Biológicas, Bauru, São PauloUniversidade Estadual Paulista, Bauru, São PauloUniversidade Estadual Paulista Departamento de Engenharia Elétrica, Bauru, São PauloUniversidade Estadual Paulista Departamento de Ciências Biológicas, Bauru, São PauloUniversidade Federal de São Carlos (UFSCar)Universidade Federal do Pará (UFPA)Universidade de São Paulo (USP)Universidade Estadual Paulista (Unesp)Moraes, Fernanda Dias deMaximino, CaioCarvalho, Fábio Alves deFerreira Alves, Alceu [UNESP]Paula, Hugo Medeiros Garrido de [UNESP]Gouveia Júnior, Amauri2014-05-27T11:29:55Z2014-05-27T11:29:55Z2013-07-05info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article123-127application/pdfhttp://dx.doi.org/10.3922/j.psns.2013.1.18Psychology and Neuroscience, v. 6, n. 1, p. 123-127, 2013.1984-30541983-3288http://hdl.handle.net/11449/7591710.3922/j.psns.2013.1.18S1983-328820130001000182-s2.0-84879583652S1983-32882013000100018.pdfScopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengPsychology and Neuroscience0,2450,245info:eu-repo/semantics/openAccess2024-06-28T13:34:10Zoai:repositorio.unesp.br:11449/75917Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T15:03:10.546580Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Effects of methylmercury on electric organ discharges in the weak electric fish Gymnotus sylvius |
title |
Effects of methylmercury on electric organ discharges in the weak electric fish Gymnotus sylvius |
spellingShingle |
Effects of methylmercury on electric organ discharges in the weak electric fish Gymnotus sylvius Moraes, Fernanda Dias de Electric organ discharge (EOD) Electroreception Methylmercury Novel response methylmercury animal experiment chromosome analysis controlled study electric fish electric organ exposure Gymnotus sylvius nonhuman organ discharge oscilloscope secretion (process) |
title_short |
Effects of methylmercury on electric organ discharges in the weak electric fish Gymnotus sylvius |
title_full |
Effects of methylmercury on electric organ discharges in the weak electric fish Gymnotus sylvius |
title_fullStr |
Effects of methylmercury on electric organ discharges in the weak electric fish Gymnotus sylvius |
title_full_unstemmed |
Effects of methylmercury on electric organ discharges in the weak electric fish Gymnotus sylvius |
title_sort |
Effects of methylmercury on electric organ discharges in the weak electric fish Gymnotus sylvius |
author |
Moraes, Fernanda Dias de |
author_facet |
Moraes, Fernanda Dias de Maximino, Caio Carvalho, Fábio Alves de Ferreira Alves, Alceu [UNESP] Paula, Hugo Medeiros Garrido de [UNESP] Gouveia Júnior, Amauri |
author_role |
author |
author2 |
Maximino, Caio Carvalho, Fábio Alves de Ferreira Alves, Alceu [UNESP] Paula, Hugo Medeiros Garrido de [UNESP] Gouveia Júnior, Amauri |
author2_role |
author author author author author |
dc.contributor.none.fl_str_mv |
Universidade Federal de São Carlos (UFSCar) Universidade Federal do Pará (UFPA) Universidade de São Paulo (USP) Universidade Estadual Paulista (Unesp) |
dc.contributor.author.fl_str_mv |
Moraes, Fernanda Dias de Maximino, Caio Carvalho, Fábio Alves de Ferreira Alves, Alceu [UNESP] Paula, Hugo Medeiros Garrido de [UNESP] Gouveia Júnior, Amauri |
dc.subject.por.fl_str_mv |
Electric organ discharge (EOD) Electroreception Methylmercury Novel response methylmercury animal experiment chromosome analysis controlled study electric fish electric organ exposure Gymnotus sylvius nonhuman organ discharge oscilloscope secretion (process) |
topic |
Electric organ discharge (EOD) Electroreception Methylmercury Novel response methylmercury animal experiment chromosome analysis controlled study electric fish electric organ exposure Gymnotus sylvius nonhuman organ discharge oscilloscope secretion (process) |
description |
Methylmercury (MeHg) is present in the environment because of natural and anthropogenic causes. MeHg can reach the central nervous system (CNS) and cause neurological damage in humans and animals. Electric organ discharges (EODs) in the weak electric fish Gymnotus sylvius are produced by the electric organ and modulated by the CNS. These discharges are used for electrolocation and communication. The purpose of the present study was to investigate the effects of dietary MeHg exposure on EOD rate in G. sylvius. An oscilloscope was used to record the EOD rate. Two treatments were investigated: chronic MeHg administration (4 μg/kg MeHg every 2 days, with a total of nine dietary exposures to MeHg) and acute MeHg administration (a single dose of 20 μg/kg MeHg). The control data for both treatments were collected every 2 days for 18 days, with a total of nine sessions (day 1 until day 18). Data of fish exposed to MeHg were collected every 2 days, totaling nine sessions (day 19 until day 36). Chronic treatment significantly increased the EOD rate in G. sylvius (p<.05), especially with the final treatment (day 32 until day 36). Acute treatment resulted in an initial increase in the EOD rate, which was maintained midway through the experiment (day 26 until day 30 p<.05). The present study provides the first insights into the effects of MeHg on EODs in weak electric fish. The EOD rate is a novel response of the fish to MeHg administration. |
publishDate |
2013 |
dc.date.none.fl_str_mv |
2013-07-05 2014-05-27T11:29:55Z 2014-05-27T11:29:55Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.3922/j.psns.2013.1.18 Psychology and Neuroscience, v. 6, n. 1, p. 123-127, 2013. 1984-3054 1983-3288 http://hdl.handle.net/11449/75917 10.3922/j.psns.2013.1.18 S1983-32882013000100018 2-s2.0-84879583652 S1983-32882013000100018.pdf |
url |
http://dx.doi.org/10.3922/j.psns.2013.1.18 http://hdl.handle.net/11449/75917 |
identifier_str_mv |
Psychology and Neuroscience, v. 6, n. 1, p. 123-127, 2013. 1984-3054 1983-3288 10.3922/j.psns.2013.1.18 S1983-32882013000100018 2-s2.0-84879583652 S1983-32882013000100018.pdf |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Psychology and Neuroscience 0,245 0,245 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
123-127 application/pdf |
dc.source.none.fl_str_mv |
Scopus reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
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1808128452306403328 |