Effects of methylmercury on electric organ discharges in the weak electric fish Gymnotus sylvius

dc.contributorUniversidade Estadual Paulista (UNESP)
dc.creatorMoraes, Fernanda Dias de
dc.creatorMaximino, Caio
dc.creatorCarvalho, Fábio Alves de
dc.creatorFerreira Alves, Alceu
dc.creatorPaula, Hugo Medeiros Garrido de
dc.creatorGouveia Júnior, Amauri
dc.date2014-05-27T11:29:55Z
dc.date2016-10-25T18:51:02Z
dc.date2014-05-27T11:29:55Z
dc.date2016-10-25T18:51:02Z
dc.date2013-07-05
dc.date.accessioned2017-04-06T02:30:21Z
dc.date.available2017-04-06T02:30:21Z
dc.identifierPsychology and Neuroscience, v. 6, n. 1, p. 123-127, 2013.
dc.identifier1984-3054
dc.identifier1983-3288
dc.identifierhttp://hdl.handle.net/11449/75917
dc.identifierhttp://acervodigital.unesp.br/handle/11449/75917
dc.identifier10.3922/j.psns.2013.1.18
dc.identifierS1983-32882013000100018
dc.identifierS1983-32882013000100018.pdf
dc.identifier2-s2.0-84879583652
dc.identifierhttp://dx.doi.org/10.3922/j.psns.2013.1.18
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/896642
dc.descriptionMethylmercury (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.
dc.languageeng
dc.relationPsychology and Neuroscience
dc.rightsinfo:eu-repo/semantics/openAccess
dc.subjectElectric organ discharge (EOD)
dc.subjectElectroreception
dc.subjectMethylmercury
dc.subjectNovel response
dc.subjectmethylmercury
dc.subjectanimal experiment
dc.subjectchromosome analysis
dc.subjectcontrolled study
dc.subjectelectric fish
dc.subjectelectric organ
dc.subjectexposure
dc.subjectGymnotus sylvius
dc.subjectnonhuman
dc.subjectorgan discharge
dc.subjectoscilloscope
dc.subjectsecretion (process)
dc.titleEffects of methylmercury on electric organ discharges in the weak electric fish Gymnotus sylvius
dc.typeOtro


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