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BIOLOGY AND DOWNSTREAM DRIFT OF SOME OREGON TRICHOPTERA1

Published online by Cambridge University Press:  31 May 2012

N. H. Anderson
N. H. Anderson
Affiliation:
Entomology Department, Oregon State University, Corvallis
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Abstract

Data are given on the biology of several species of Trichoptera in the Metolius River, Oregon, based on drift and benthos samples. Twenty-seven species were collected. Species of Limnephilidae, Brachycentridae, Hydroptilidae, and Lepidostomatidae were important drift components. The Metolius River is extremely productive, with a mean density of larval Trichoptera of 7400 per square meter in benthos samples and a maximum of 5000 per 24 hours in drift-trap samples. Different species varied in their tendency to drift, in the age class distribution in the drift, and in diel periodicity. Drift-trap collecting is shown to be a useful method of studying aspects of behavior such as the dispersal of larvae and the emergence of pupae.

Type
Articles
Information
The Canadian Entomologist , Volume 99 , Issue 5 , May 1967 , pp. 507 - 521
Copyright
Copyright © Entomological Society of Canada 1967

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