Assessment of the effect of a commercial formulation of Methomyl on reproduction of Daphnia obtusa Kürz (1874)

dc.contributorCIGRENen-US
dc.creatorGaete, Hernán
dc.creatorOlivares, Yenny
dc.creatorEscobar, Cristián
dc.date2017-03-07
dc.date.accessioned2023-09-26T18:20:33Z
dc.date.available2023-09-26T18:20:33Z
dc.identifierhttps://www.lajar.cl/index.php/rlajar/article/view/vol41-issue5-fulltext-16
dc.identifier10.3856/vol41-issue5-fulltext-16
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/8846972
dc.descriptionThe aim of this study was to evaluate the effect of a commercial formulation of Methomyl on the reproduction in Daphnia obtusa. Neonates (<24 h) were exposed to concentrations of insecticide (1.0, 1.5, 2.0, 2.5, 3.0 µg L-1) for a period of 21 days. The results showed a significant decrease in the number of molts, total neonates, fertility and sex ratio index. Significant regressions were found between reproductive parameters and concentrations of the insecticide: molts (R2= 0.96), fertility (R2= 0.97), number of female neonates born per female (R2= 0.90), and the number of male neonates born per female (R2= 0.94). Embryotoxicity was also observed; the number of neonates born with malformations increased in the highest concentrations of Methomyl 90 SP® tested. In conclusion, Methomyl 90 SP® inhibits reproduction of D. obtusa. However, a clear effect as an endocrine disrupter was not observed. This insecticide is embryotoxic; it causes malformations in neonates of Daphnia obtusa.en-US
dc.formatapplication/pdf
dc.languageeng
dc.publisherPontificia Universidad Católica de Valparaísoen-US
dc.relationhttps://www.lajar.cl/index.php/rlajar/article/view/vol41-issue5-fulltext-16/343
dc.relationhttps://www.lajar.cl/index.php/rlajar/article/downloadSuppFile/vol41-issue5-fulltext-16/101
dc.sourceLatin American Journal of Aquatic Research; Vol 41, No 5 (2013); 979-984en-US
dc.sourcePlataforma para envío de artículos - Latin American Journal of Aquatic Research; Vol 41, No 5 (2013); 979-984es-ES
dc.source0718-560X
dc.source0718-560X
dc.subjectDaphnia; endocrine; neonates; pesticide; disruptor; zooplankton; ecotoxicologyen-US
dc.titleAssessment of the effect of a commercial formulation of Methomyl on reproduction of Daphnia obtusa Kürz (1874)en-US
dc.typeinfo:eu-repo/semantics/article
dc.typeinfo:eu-repo/semantics/publishedVersion
dc.typeen-US
dc.typees-ES


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