researcher
Suzana Diniz

Suzana Diniz

Campinas, São Paulo, Brazil

State University of Campinas (Unicamp), São Paulo, Brazil

M.Sc in Ecology, Ph.D. Candidate in Ecology from State University of Campinas, Brazil

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Hi Steven, indeed, I am writing a lab note about this. As a quick answer, the web decorations vary among orb-webs from the same individual (intra-individual variation) and among different individuals from same species (intra-specific variation). It is a plastic feature that is related to ontogeny, prey abundance, starvation, and/or abiotic factors.
Nov 05, 2016
Why do spiders decorate their webs?
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Thank you! Where have you been in Brazil? I can help you with the Portuguese if you want.
Oct 31, 2016
Why do spiders decorate their webs?
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Hi Prof. Steven Juliano, thank you very much for your support. It is my first experience with crowdfunding. We have been doing the first pilot experiments, and the results seem promising. I noticed you have a partnership with the Universidade Federal de Viçosa and the Instituto Oswaldo Cruz, very interesting research and your Portuguese is good! In my University (Universidade Estadual de Campinas) there is a research group, headed by Prof. Gustavo Romero, about the structure of aquatic communities in Bromeliads, a very spatially structured and unstable environment. Good luck with your project too!
Oct 22, 2016
Why do spiders decorate their webs?
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Hi Cindy, I have been seeing spider decorations for a long time in my life, as the spider Argiope argentata is a very common orb-weaver in the gardens here in Brazil. Indeed, I could find these spiders easily just because of the zigzag decorations that they frequently build in the orb-web center. But what drew my attention was the wonderful geometric pattern of the zigzag and how they could be variable. For example, some build four complete zigzag lines in cruciate disposition such that they overlapped with the legs of the spider in resting posture, whereas others just build a just a zigzag line. Furthermore, juveniles tend to build discoid decorations completely different from the cruciate pattern. So, what I think it is important is the variation in web decorations among individuals of the same species and what factors underlie this variability. Anyway, we could see some fascinating examples of decoration patterns. Such as this Peruvian orb-web spider of the genus Cyclosa which builds with silk and debris a decoration with a shape similar to a larger spider, like a fake spider (http://voices.nationalgeographic.com/2013/01/23/spider-decoy/).
Oct 12, 2016
Why do spiders decorate their webs?
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