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RECOVERY OF AQUATIC ARTHROPOD POPULATIONS IN A WOODLAND STREAM AFTER DEPLETION BY FENITROTHION TREATMENT

Published online by Cambridge University Press:  31 May 2012

D. C. Eidt
D. C. Eidt
Affiliation:
Maritimes Forest Research Centre, Canadian Forestry Service, Fredericton, New Brunswick E3B 5P7
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Abstract

Fenitrothion injected into a stream at 73 μg/L diminished to 23 μg/L 343 m downstream and resulted in a decline of standing crop of benthic arthropods between 343 and 375 m downstream. Large and small insect larvae were not affected differentially. Most of the kill consisted of Leuctra spp. (Plecoptera: Leuctridae) larvae. Benthos recovery was complete 50 days after the treatment.

Résumé

Un traitement de fenitrothion dans un ruisseau à raison de 73 μ/L a diminué à μg/L à 343 m en aval, ce qui a résulté en un déclin des arthropodes benthiques sur une distance de 343 à 375 m en aval. Les larves d’insectes, de grande ou petite taille n’ont pas été affectées différemment. La plupart des larves tuées étaient de l’espèce Leuctra (Plecoptera : Leuctridae). La guérison du benthos était complète 50 jours après le traitement.

Type
Articles
Information
The Canadian Entomologist , Volume 113 , Issue 4 , April 1981 , pp. 303 - 313
Copyright
Copyright © Entomological Society of Canada 1981

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References

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