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2015 | 55 | 2 |

Tytuł artykułu

Effects of biological and environmental factors on sex ratio in Ascogaster quadridentata Wesmael (Hymenoptera: Braconidae), a parasitoid of Cydia pomonella L. (Torticidae)

Treść / Zawartość

Warianty tytułu

Języki publikacji

EN

Abstrakty

EN
The sex ratio in the natural population of most Hymenopteran parasitoids is 1 : 1. Females of these parasitoids, however, can regulate the sex of their offspring in response to environmental and biological factors. Under certain circumstances, this may lead to an overproduction of males, which can result in a very negative impact on any control program using these parasitoids. For these reasons, understanding the effect of these factors is very important. In this study, five biological and environmental factors known to affect sex ratio in parasitic Hymenoptera were investigated for Ascogaster quadridentata Wesmael, a parasitoid of Cydia pomonella L. Results showed that food, ambient temperature, and parasitoid age had significant effects on the sex ratio of the offspring of Hymenopteran parasitoids. The percentage of females decreased with lack of food, parasitoid age (when it became 10-days-old or older), and at low (15°C) and high (35°C) temperatures. The effect of host age and density, however, was not significant.

Słowa kluczowe

Wydawca

-

Rocznik

Tom

55

Numer

2

Opis fizyczny

p.151-155,ref.

Twórcy

autor
  • Department of Agriculture, Atomic Energy Commission of Syria (AECS), P.O. Box 6091, Damascus, Syria
autor
  • Department of Agriculture, Atomic Energy Commission of Syria (AECS), P.O. Box 6091, Damascus, Syria
autor
  • Faculty of Agriculture, Tishreen University, Lattakia, Syria

Bibliografia

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  • Charnov E.L., Hartogh L., Jones R.L., Assem V. 1981. Sex ratio evolution in variable environment. Nature 289 (5793): 27–33.
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  • Garcia-Medel D., Sivinski J., Diaz-Fleischfr F., Ramirez-Romero R.M., Aluja M. 2007. Foraging behavior by six fruit fly parasitoids (Hymenoptera: Braconidae) released as single or multiple-species cohorts in field cages: Influence of fruit location and host density. Biological Control 43 (1): 12–22.
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  • Gunduz E.A., Gulel A. 2005. Investigation of fecundity and sex ratio in the parasitoid Bracon hebetor Say (Hymenoptera: Braconidae) in relation to parasitoid age. Turkish Journal of Zoology 29 (4): 291–294.
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  • Jarosik V., Holy I., Lapchin L., Haveika J. 2003. Sex ratio in the aphid parasitoid Aphidius colemani (Hymenoptera: Braconidae) in relation to host size. Bulletin of Entomological Research 39 (3): 255–258.
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  • King B.H. 1993. Sex ratio manipulation by parasitoid wasps. p. 418–441. In: “Evolution and Diversity of Sex Ratio in Insects and Mites” (D.L. Wrensch, M.A. Ebbert, eds.). Chapman & Hall, New York, USA, 634 pp.
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  • Owen R.E. 1983. Sex ratio adjustment in Asobara persimilis (Hymenoptera: Braconidae), a parasitoid of Drosophila. Oecologia 59 (2–3): 402–404.
  • Proverbs M.D., Logan D.M. 1970. A rotating oviposition cage for the codling moth Carpocapsa pomonella. The Canadian Entomologist 102 (1): 42–49.
  • Shuker D.M., Pen I., West S.A. 2006. Sex ratio under asymmetrical local mate competition in the parasitoid wasp Nasonia vitripennis. Behavior Ecology 17 (3): 345–325.
  • Uckan F., Gulel A. 2002. Age-related fecundity and sex ratio variation in Apanteles galleriae (Hymenoptera: Braconidae) and host effect on fecundity and sex ratio of its hyperparasitoid Dibrachys boarmiae (Hymenoptera: Pteromalidae). Journal of Applied Entomology 126 (10): 534–537.
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Typ dokumentu

Bibliografia

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