Hostname: page-component-cd9895bd7-gxg78 Total loading time: 0 Render date: 2024-12-25T06:43:33.442Z Has data issue: false hasContentIssue false
  • English
  • Français

EFFECTS OF MATERNAL DENSITY AND AGE ON THE DAILY FECUNDITY AND OFFSPRING SEX RATIO IN TETRANYCHUS URTICAE KOCH

Published online by Cambridge University Press:  31 May 2012

S.Y. Li  and
R. Harmsen
S.Y. Li
Affiliation:
Biology Department, Queen's University, Kingston, Ontario, Canada K7L 3N6
R. Harmsen
Affiliation:
Biology Department, Queen's University, Kingston, Ontario, Canada K7L 3N6
Get access Rights & Permissions [Opens in a new window]

Extract

The two-spotted spider mite, Tetranychus urticae Koch, is an arrhenotokous species (Helle and Bolland 1967). Mated females produce both male and female offspring; unmated females produce only sons. Although there is no “normal” sex ratio for spider mites, a ratio of one male to approximately three females is often found in many tetranychid species (Wrensch 1985). The exact mechanism of the female-biased sex ratio is not fully understood, but previous studies have demonstrated several factors affecting the sex ratio in spider mites. In this report, we analyze the effects of maternal density, age, and the interaction between these factors on female daily fecundity and offspring sex ratio in T. urticae.

Type
Articles
Information
The Canadian Entomologist , Volume 125 , Issue 3 , June 1993 , pp. 633 - 635
Copyright
Copyright © Entomological Society of Canada 1993

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Boudreaux, H.G. 1963. Biological aspects of some phytophagous mites. Annual Review of Entomology 8: 137–154.Google Scholar
Helle, W., and Bolland, H.R.. 1967. Karyotypes and sex-determination in spider mites (Tetranychidae). Genetica 38: 43–53.Google Scholar
Overmeer, W.P.J. 1972. Notes on mating behavior and sex ratio control of Tetranychus urticae Koch (Acarina: Tetranychidae). Entomologische Berichten 32: 240–244.Google Scholar
Potter, D.A. 1978. Functional sex ratio in the carmine spider mite. Annals of the Entomological Society of America 71: 218–222.CrossRefGoogle Scholar
Shih, C.T. 1979. The influence of age of female Tetranychus kanzawai on sex ratio and life cycle of its progeny. pp. 511–517 in Rodriguez, J.G. (Ed.), Recent Advances in Acarology. Vol. 1. Academic Press, Inc., New York, NY. 631 pp.Google Scholar
Shih, C.T., Poe, S.L., and Cromroy, H.L.. 1976. Biology, life table and intrinsic rate of increase of Tetranychus urticae. Annals of the Entomological Society of America 69: 362–264.CrossRefGoogle Scholar
Wrensch, D.L. 1979. Components of reproductive success in spider mites. pp. 153–164 in Rodriguez, J.G. (Ed.), Recent Advances in Acarology. Vol. 1. Academic Press, Inc., New York, NY. 631 pp.Google Scholar
Wrensch, D.L. 1985. Reproductive parameters. pp. 165–170 in Helle, W., and Sabelis, M.W. (Eds.), Spider Mites: Their Biology, Natural Enemies and Control. Vol. 1A. Elsevier, Amsterdam, The Netherlands. 405 pp.Google Scholar
Wrensch, D.L., and Young, S.S.Y.. 1978. Effects of density and host quality on rate of development, survivorship, and sex ratio in the carmine spider mite. Environmental Entomology 4: 499–501.CrossRefGoogle Scholar
Zar, J.H. 1984. Biostatistical Analysis. Prentice-Hall, Englewood Cliffs, NJ. 718 pp.Google Scholar