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Seasonal and interannual variations in the frequency and severity of deformities in larvae of Chironomus riparius (Meigen, 1804) and Prodiamesa olivacea (Meigen, 1818) (Diptera, Chironomidae) collected in a polluted site



Seasonal and interannual variations in the frequency and severity of deformities in larvae of Chironomus riparius (Meigen, 1804) and Prodiamesa olivacea (Meigen, 1818) (Diptera, Chironomidae) collected in a polluted site



Environmental Monitoring and Assessment 64(3): 617-626



Larvae of Chironomus riparius and Prodiamesa olivacea were sampled at intervals over the period November 1993 and October 1995 from the river Sar in Galicia (north-west Spain), with the aim of investigating possible temporal variations in the frequency of deformed individuals and in 'Toxic Score' values, a score for severity of the abnormalities calculated for each species. The results obtained indicate that, in both species, deformities are more frequent during the colder period of the year.

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Accession: 003554924

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DOI: 10.1023/a:1006333808107



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