Seasonal patterns of parasitism of the tropical spiders Theridion evexum (Araneae, Theridiidae) and Allocyclosa bifurca (Araneae, Araneidae) by the wasps Zatypota petronae and Polysphincta gutfreundi (Hymenoptera, Ichneumonidae).

@article{Barrantes2008SeasonalPO,
  title={Seasonal patterns of parasitism of the tropical spiders Theridion evexum (Araneae, Theridiidae) and Allocyclosa bifurca (Araneae, Araneidae) by the wasps Zatypota petronae and Polysphincta gutfreundi (Hymenoptera, Ichneumonidae).},
  author={Gilbert Barrantes and William G. Eberhard and Ju-Lin Weng},
  journal={Revista de biologia tropical},
  year={2008},
  volume={56 2},
  pages={749-54}
}
The rates of parasitism of Theridion evexum by the parasitoid wasp Zatypota petronae, and Allocyclosa bifurca by Polysphincta gutfreundi, were followed for two years. Parasitism of T. evexum was very low (mean 1.39 +/- 1.8%), and restricted to nearly seven months of the year. Parasitism of A. bifurca was higher (mean 7.8 +/- 7.6%), and did not show a seasonal pattern. Reproduction of the host spider T evexum was highly seasonal, with only one, highly coordinated generation per year, while… CONTINUE READING

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