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dc.creatorGaete,Hernán
dc.creatorOlivares,Yenny
dc.creatorEscobar,Cristián
dc.date2013-11-01
dc.date.accessioned2019-05-03T13:27:30Z
dc.date.available2019-05-03T13:27:30Z
dc.identifierhttps://scielo.conicyt.cl/scielo.php?script=sci_arttext&pid=S0718-560X2013000500016
dc.identifier.urihttp://revistaschilenas.uchile.cl/handle/2250/87941
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.
dc.formattext/html
dc.languageen
dc.publisherPontificia Universidad Católica de Valparaíso. Facultad de Recursos Naturales. Escuela de Ciencias del Mar
dc.relation103856/vol41-issue5-fulltext-16
dc.rightsinfo:eu-repo/semantics/openAccess
dc.sourceLatin american journal of aquatic research v.41 n.5 2013
dc.subjectDaphnia
dc.subjectendocrine
dc.subjectneonates
dc.subjectpesticide
dc.subjectdisruptor
dc.subjectzooplankton
dc.subjectecotoxicology
dc.titleAssessment of the effect of a commercial formulation of Methomyl on reproduction of Daphnia obtusa Kürz (1874)


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