The Stockholm populations of Adalia bipunctata (L) (Coleoptera: Coccinellidae)--a case of extreme female-biased population sex ratio.

Abstract:

:The genetic composition and sex ratio in the Stockholm populations of Adalia bipunctata have been studied. The overall frequency of melanics is 3.2%, which is significantly lower than in the populations of St. Petersburg and other large cities along the Baltic Sea. The secondary sex ratio in the Stockholm populations is female-biased 82:18. More than half of A. bipunctata females are infected with the male-killing Spiroplasma bacterium. Beetles of the co-existing species Adalia decempunctata are infected with a different bacterium belonging to the genus Rickettsia.

journal_name

Hereditas

journal_title

Hereditas

authors

Zakharov IA,Shaikevich EV

doi

10.1111/j.1601-5223.2001.00263.x

subject

Has Abstract

pub_date

2001-01-01 00:00:00

pages

263-6

issue

3

eissn

0018-0661

issn

1601-5223

journal_volume

134

pub_type

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