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SEX RATIOS OF SOME HIGH ARCTIC CHIRONOMIDAE (DIPTERA)

Published online by Cambridge University Press:  31 May 2012

D. R. Oliver  and
H. V. Danks
D. R. Oliver
Affiliation:
Entomology Research Institute, Canada Department of Agriculture, Ottawa
H. V. Danks
Affiliation:
Entomology Research Institute, Canada Department of Agriculture, Ottawa
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Abstract

The sex ratios at emergence of some Chironomidae from ponds in the Hazen Camp area (81°49′ N., 71°18′ W.) are given from trap records for a number of seasons.

In Tanypodinae and Chironomini there are apparently about equal numbers of the sexes; in Tanytarsini and most Orthocladiinae females consistently outnumber males, often forming 60% or more of the total emergence. These findings are discussed: the presence of facultative parthenogenesis in some species is thought to be likely.

Type
Articles
Information
The Canadian Entomologist , Volume 104 , Issue 9 , September 1972 , pp. 1413 - 1417
Copyright
Copyright © Entomological Society of Canada 1972

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