Assessment of the effect of a commercial formulation of Methomyl on reproduction of Daphnia obtusa Kürz (1874)
The 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...
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Pontificia Universidad Católica de Valparaíso. Facultad de Recursos Naturales. Escuela de Ciencias del Mar
2013
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oai:scielo:S0718-560X20130005000162014-04-23Assessment of the effect of a commercial formulation of Methomyl on reproduction of Daphnia obtusa Kürz (1874)Gaete,HernánOlivares,YennyEscobar,Cristián Daphnia endocrine neonates pesticide disruptor zooplankton ecotoxicology The 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.info:eu-repo/semantics/openAccessPontificia Universidad Católica de Valparaíso. Facultad de Recursos Naturales. Escuela de Ciencias del MarLatin american journal of aquatic research v.41 n.5 20132013-11-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-560X2013000500016en103856/vol41-issue5-fulltext-16 |
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Scielo Chile |
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Scielo Chile |
| language |
English |
| topic |
Daphnia endocrine neonates pesticide disruptor zooplankton ecotoxicology |
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Daphnia endocrine neonates pesticide disruptor zooplankton ecotoxicology Gaete,Hernán Olivares,Yenny Escobar,Cristián Assessment of the effect of a commercial formulation of Methomyl on reproduction of Daphnia obtusa Kürz (1874) |
| description |
The 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. |
| author |
Gaete,Hernán Olivares,Yenny Escobar,Cristián |
| author_facet |
Gaete,Hernán Olivares,Yenny Escobar,Cristián |
| author_sort |
Gaete,Hernán |
| title |
Assessment of the effect of a commercial formulation of Methomyl on reproduction of Daphnia obtusa Kürz (1874) |
| title_short |
Assessment of the effect of a commercial formulation of Methomyl on reproduction of Daphnia obtusa Kürz (1874) |
| title_full |
Assessment of the effect of a commercial formulation of Methomyl on reproduction of Daphnia obtusa Kürz (1874) |
| title_fullStr |
Assessment of the effect of a commercial formulation of Methomyl on reproduction of Daphnia obtusa Kürz (1874) |
| title_full_unstemmed |
Assessment of the effect of a commercial formulation of Methomyl on reproduction of Daphnia obtusa Kürz (1874) |
| title_sort |
assessment of the effect of a commercial formulation of methomyl on reproduction of daphnia obtusa kürz (1874) |
| publisher |
Pontificia Universidad Católica de Valparaíso. Facultad de Recursos Naturales. Escuela de Ciencias del Mar |
| publishDate |
2013 |
| url |
http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-560X2013000500016 |
| work_keys_str_mv |
AT gaetehernan assessmentoftheeffectofacommercialformulationofmethomylonreproductionofdaphniaobtusakurz1874 AT olivaresyenny assessmentoftheeffectofacommercialformulationofmethomylonreproductionofdaphniaobtusakurz1874 AT escobarcristian assessmentoftheeffectofacommercialformulationofmethomylonreproductionofdaphniaobtusakurz1874 |
| _version_ |
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