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- Coslovsky, Michael; Zschokke, Samuel
- Journal of insect behavior 2009 v.22 no.1 pp. 29-38
- Araneae; insect behavior; prediction; silk; webs
- ... Orb-web spiders build vertically asymmetric webs, in which the lower part is larger than the upper part. One hypothesis explaining this asymmetry suggests that the spider's mass imposes higher building costs in the upper part of the web, causing the spider to reduce this part of the web. We tested this hypothesis by assessing building costs of different parts of the web. We found that the specific ...
- Matsumoto, Rikio
- Journal of insect behavior 2009 v.22 no.1 pp. 39-48
- Araneae; Formicidae; Ichneumonidae; hosts; insect behavior; instars; larvae; parasitoids; predators; pupae; webs
- ... When the larva of Brachyzapus nikkoensis, a koinobiont ectoparasitoid of Agelena limbata forming a funnel web, is a penultimate instar, “veils” of very fine and dense threads covering the spider and parasitoid larva were observed in the tunnel of funnel web. As the veils are not formed until the parasitoid became penultimate instar and the parasitoid larvae are on active hosts at this stage, the v ...