{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

architectually built webs

architectually built webs - Downloaded from rsbl..org on...

Info icon This preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
doi: 10.1098/rsbl.2007.0218 , 456-458 3 2007 Biol. Lett. Todd A Blackledge and Chad M Eliason architecturally constrained in spider orb webs Functionally independent components of prey capture are References http://rsbl.royalsocietypublishing.org/content/3/5/456.full.html#related-urls Article cited in: http://rsbl.royalsocietypublishing.org/content/3/5/456.full.html#ref-list-1 This article cites 17 articles, 1 of which can be accessed free Email alerting service here right-hand corner of the article or click Receive free email alerts when new articles cite this article - sign up in the box at the top http://rsbl.royalsocietypublishing.org/subscriptions go to: Biol. Lett. To subscribe to This journal is © 2007 The Royal Society on November 6, 2010 rsbl.royalsocietypublishing.org Downloaded from
Image of page 1

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Biol. Lett. (2007) 3 , 456–458 doi:10.1098/rsbl.2007.0218 Published online 3 July 2007 Animal behaviour Functionally independent components of prey capture are architecturally constrained in spider orb webs Todd A. Blackledge 1, * and Chad M. Eliason 2 1 Department of Biology, The University of Akron, Akron, OH 44325-3908, USA 2 Department of Curricular and Instructional Studies, The University of Akron, Akron, OH 44325-4205, USA * Author for correspondence ( [email protected] ). Evolutionary conflict in trait performance under different ecological contexts is common, but may also arise from functional coupling between traits operating within the same context. Orb webs first intercept and then retain insects long enough to be attacked by spiders. Improving either function increases prey capture and they are largely determined by different aspects of web architecture. We manipulated the mesh width of orbs to investigate its effect, along with web size, on prey capture by spiders and found that they functioned independently. Probability of prey capture increased with web size but was not affected by mesh width. Conversely, spiders on narrow-meshed webs were almost three times more likely to capture energetically profit- able large insects, which demand greater prey retention. Yet, the two functions are still con- strained during web spinning because increasing mesh width maximizes web size and hence interception, while retention is improved by decreasing mesh width because more silk adheres to insects. The architectural coupling between prey interception and retention has probably played a key role in both the macro- evolution of orb web shape and the expression of plasticity in the spinning behaviours of spiders. Keywords: Araneidae; behavioural correlations; phenotypic plasticity; silk; tradeoff; web efficiency 1. INTRODUCTION Evolutionary conflict in organismal performance in different ecological contexts is common ( Sih et al. 2004 ), but also results from functionally coupled traits operating in the same context ( Podos & Hendry 2006 ). The evolutionary success of orb weaving spiders depends on efficient interception and reten- tion of insects by webs, but most insects escape webs before being attacked ( Nentwig 1982 ; Eberhard 1990 ). Interception and retention are largely
Image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern