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Acute toxicity and cholinesterase inhibition of the nematicide ethoprophos in larvae of gar Atractosteus tropicus(Semionotiformes: Lepisosteidae).

dc.creatorMena Torres, Freylan
dc.creatorPfennig, Sacsha
dc.creatorArias Andrés, María de Jesús
dc.creatorMárquez Couturier, Gabriel
dc.creatorSevilla, Adrián
dc.creatorProtti Quesada, Maurizio
dc.date2012-10-30
dc.date.accessioned2016-05-03T15:31:24Z
dc.date.available2016-05-03T15:31:24Z
dc.identifierhttp://revistas.ucr.ac.cr/index.php/rbt/article/view/2769
dc.identifier10.15517/rbt.v60i1.2769
dc.identifier.urihttp://hdl.handle.net/10669/27079
dc.descriptionBiomarkers are a widely applied approach in environmental studies. Analyses of cholinesterase (ChE), glutathione S-transferase (GST) and lipid peroxidation (LPO) are biomarkers that can provide information regarding early effects of pollutants at different biochemical levels on an organism. The aim of this study was to evaluate the biomarker approach on a Costa Rican native and relevant species. For this, larvae of gar (Atractosteus tropicus) were exposed to the organophosphorus nematicide, ethoprophos. Acute (96hr) exposure was conducted with pesticide concentrations ranging from 0.1µg/L to 1 500µg/L. The 96hr LC50 calculated was 859.7µg/L. After exposure, three biomarkers (ChE, GST and LPO) were analyzed in fish that survived the acute test. The lowest observed effect concentration (LOEC) regarding ChE activity inhibition was 50µg/L. This concentration produced a significant inhibition (p<0.05) of the enzyme by 20%. The highest concentration tested without showing any effect on ChE activity and therefore considered as no observed effect concentration (NOEC) was 10µg/L. Ethoprophos concentration of 400µg/L caused a ChE inhibition by 79%. In this study, no significant variations (p>0.05) in GST activity and LPO were observed in A. tropicus larvae after exposure to ethoprophos.en-US
dc.descriptionEl proceso de reproducción inducida de Atractosteus tropicus es útil para la acuicultura y la reintroducción en zonas donde las poblaciones silvestres se han reducido considerablemente. En larvas de esta especie se evaluó la toxicidad aguda, así como la respuesta de tres biomarcadores: actividad colinesterasa (ChE), actividad de Glutation S-transferasa (GST) y peroxidación de lípidos (LPO). Asimismo, se realizaron exposiciones agudas (96hr) a etoprofos (nematicida organofosforado), en donde se utilizaron concentraciones entre 0.1µg/L y 1 500µg/L del nematicida. La concentración letal 50 (LC50) calculada fue de 859.7µg/L; la máxima concentración sin efecto en los organismos (NOEC) 10µg/L y la concentración más baja en la cual se observó algún efecto (LOEC) 50µg/L. A esa concentración, el efecto observado fue una reducción significativa (p<0.05) en la actividad de la ChE. Una concetración de etoprofos de 400µg/L causó una inhibición del 79% en la actividad ChE. La actividad GST y la LPO no mostraron una respuesta significativa (p>0.05) luego de la exposición de los organismos a etoprofos.es-ES
dc.formatapplication/pdf
dc.languageeng
dc.publisherUniversidad de Costa Ricaen-US
dc.rightsCopyright (c) 2014 International Journal of Tropical Biology and Conservationen-US
dc.sourceRevista de Biología Tropical/International Journal of Tropical Biology and Conservation; Vol. 60 (1) March 2012en-US
dc.sourceRevista de Biología Tropical/International Journal of Tropical Biology and Conservation; Vol. 60 (1) March 2012es-ES
dc.sourceRevista Biología Tropical; Vol. 60 (1) March 2012pt-PT
dc.source2215-2075
dc.source0034-7744
dc.source10.15517/rbt.v60i1
dc.subjectgaren-US
dc.subjectatractosteus tropicusen-US
dc.subjectethoprophosen-US
dc.subjectcholinesterase inhibitionen-US
dc.subjectglutathione s-transferaseen-US
dc.subjectlipid peroxidationen-US
dc.subjectpez gaspares-ES
dc.subjectatractosteus tropicuses-ES
dc.subjectetoprofoses-ES
dc.subjectinhibidores de la colinesterasaes-ES
dc.subjectglutatión s-transferasaes-ES
dc.subjectperoxidación lipídicaes-ES
dc.titleAcute toxicity and cholinesterase inhibition of the nematicide ethoprophos in larvae of gar Atractosteus tropicus(Semionotiformes: Lepisosteidae).en-US
dc.titleAcute toxicity and cholinesterase inhibition of the nematicide ethoprophos in larvae of gar Atractosteus tropicus(Semionotiformes: Lepisosteidae).es-ES
dc.typeinfo:eu-repo/semantics/article
dc.typeinfo:eu-repo/semantics/publishedVersion


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