Experimental & Applied Acarology

, Volume 5, Issue 1–2, pp 151–162 | Cite as

Maternal heterogeneity in primary sex-ratio of three tetranychid mites

  • D. A. Krainacker
  • J. R. Carey
Article
Accepted:

Abstract

The influence of maternal age on primary sex ratio was determined forTetranychus urticae, T. pacificus andT. turkestani (Acari:Tetranychidae). All females were allowed to mate once.Tetranychus urticae had the highest production of daughters and the lowest production of sons. The sex ratio ofT. urticae was nearly 2∶1 (daughters∶sons), whereas for the other species it was 0.6∶1. Net sex ratios were all shifted in favor of daughters, suggesting that most son-production occurs late in life. Demographic techniques are applied to tetranychid populations, including the concepts of reproductive concentration curves and expectation of future reproduction based on age and previous offspring.

Keywords

Lower Production Concentration Curve Future Reproduction Tetranychid Mite Tetranychid Population 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
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Copyright information

© Elsevier Science Publishers B.V 1988

Authors and Affiliations

  • D. A. Krainacker
    • 1
  • J. R. Carey
    • 1
  1. 1.Department of EntomologyUniversity of CaliforniaDavisUSA

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