Reports

"Sex-Ratio" Condition: Unusual Mechanisms in Bark Beetles

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Science  08 Jul 1966:
Vol. 153, Issue 3732, pp. 208-209
DOI: 10.1126/science.153.3732.208

Abstract

Although males and females occur in similar frequency in the broods of most scolytid beetles, certain individuals of several species produce offspring highly aberrant in the ratio of sexes-all or mostly female. In some instances this condition reflects gynogenesis (parthenogenesis stimulated by mating); in others, a maternally transmitted factor.