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The Sex Ratios in Ips tridens Mannerheim (Coleoptera: Scolytidae)1

Published online by Cambridge University Press:  31 May 2012

G. R. Hopping
G. R. Hopping
Affiliation:
Forest Entomology and Pathology Laboratory, Calgary, Alberta
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Extract

Species of the genus Ips De Geer are polygamous and the number of females in a gallery map vary from one to five, or occasionally six, to one male. Populations of Ips tridens Mann. going into hibernation in the fall of the year in Alberta, have a sex ratio of approximatclv 3 ♂ ♂: 1 ♀. The assumption has been that the preponderance of fenlales is caused by some mortality factor which is more effective against the males. More recent evidence indicates that the cause is of a genetical nature.

Type
Articles
Information
The Canadian Entomologist , Volume 94 , Issue 5 , May 1962 , pp. 506
Copyright
Copyright © Entomological Society of Canada 1962

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References

Hopping, G. R. 1961. Techniques for rearing Ips De Geer (Coleoptera : Scolytidae). Can. Ent. 93: 1050–1053.CrossRefGoogle Scholar