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FIELD AND LABORATORY STUDIES ON SEX RATIO IN IPS ACUMINATUS (COLEOPTERA: SCOLYTIDAE) IN NORWAY

Published online by Cambridge University Press:  31 May 2012

Alf Bakke
Alf Bakke
Affiliation:
Norwegian Forest Research Institute, Vollebekk, Norway
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Abstract

The sex ratio of the polygamous species Ips acuminatus (Gyllenhal) varied in 31 localities of Norway from 1 to 4 females per male in northern and western areas to 20 females and more in some southeastern areas. The number of female galleries per nuptial chamber (usually three to five) varied accordingly and isolated female galleries were also formed. Laboratory breedings showed that the species has two types of females, one which produces only females and one which produces both-sixes usually with a 1:1 sex ratio.

Type
Articles
Information
The Canadian Entomologist , Volume 100 , Issue 6 , June 1968 , pp. 640 - 648
Copyright
Copyright © Entomological Society of Canada 1968

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References

Bakke, A. 1967. Pheromon in the bark beetle, Ips acuminatus Gyll. Z. angew. Ent. 59: 49–53.CrossRefGoogle Scholar
Bakke, A. 1968. Ecological Studies on bark beetles (Coleoptera: Scolytidae) associated with Scots pine (Pinus sylvestris L.) in Norway with particular reference to the influence of temperature. Meddr norske SkogsforsVes. 21: 441–602.Google Scholar
Chararas, C. 1962. Etude biologique des scolytides des conifères. Editions Paul Lechevalier, Paris.Google Scholar
Hopping, G. R. 1961. Techniques for rearing Ips DeGeer (Coleoptera: Scolytidae). Can. Ent. 93: 1050–1053.CrossRefGoogle Scholar
Hopping, G. R. 1962. The sex ratios in Ips tridens Mannerheim (Coleoptera: Scolytidae). Can. Ent. 94: 506.CrossRefGoogle Scholar
Hopping, G. R. 1964. The breeding evidence indicating two genetic types of females of Ips tridens (Mannerheim) (Coleoptera: Scolytidae). Can. Ent. 96: 117–118.CrossRefGoogle Scholar
Klauser, O. 1954. Ein Beitrag zur Kenntnis des Kupfersteckers, Pityogenes chalcographus L. — Die grosse Borkenkäferkalamität in Südwestdeutschland 1944–1951. G. Wellenstein Ringingen. pp. 285–299.Google Scholar
Lanier, G. N. 1966. Interspecific mating and cytological studies of closely related species of Ips DeGeer and Orthotomicus Ferrari (Coleoptera: Scolytidae). Can. Ent. 98: 175–188.Google Scholar
Lanier, G. N., and Oliver, J. H.. 1966. “Sex-ratio” condition: Unusual mechanisms in bark beetles. Science 153: 208–209.CrossRefGoogle ScholarPubMed
Løvendal, E. A. 1898. De danske barkbiller og deres betydning for skov- og havebruket. Det Schubotheske forlag, København.Google Scholar
Schwerdtfeger, F. 1925. Geschlechtsverhältnis und Fortpflanzungsbiologie rindenbrütender Borkenkäfer. Forstarchiv 1: 183–185.Google Scholar
Schwerdtfeger, F. 1929. Ein Beitrag zur Fortpflanzungsbiologie des Borkenkäfers Pityogenes chalcographus L. Z. angew. Ent. 15: 335–427.CrossRefGoogle Scholar
Seitner, M. 1923. Beobachtungen und Erfahrungen aus dem Auftreten des achtzähnigen Fichtenborkenkäfers Ips typographus L. in Oberösterreich und Steiermark in den Jahren 1921 und 1922. Zentbl. ges. Forstw. 49: 270–277.Google Scholar
Stark, U. N. 1952. Koroedy (Ipidae). Fauna SSSR 31. Moskva.Google Scholar
Smith, S. G. 1962. Cytogenetic pathways in beetle speciation. Can. Ent. 94: 941–955.Google Scholar
Trägårdh, I. 1939. Sveriges skogsinsekter. Hugo Gebers forlag, Stockholm.Google Scholar
Vogel, R. 1925. Bemerkungen über das Geschlechtsverhältnis und die Fortpflanzungsbiologie rindenbrütender Borkenkäfer. Silva 13(44): 347–348.Google Scholar