Jump to ContentJump to Main Navigation
Sex, Size and Gender RolesEvolutionary Studies of Sexual Size Dimorphism$
Users without a subscription are not able to see the full content.

Daphne J. Fairbairn, Wolf U. Blanckenhorn, and Tamás Székely

Print publication date: 2007

Print ISBN-13: 9780199208784

Published to Oxford Scholarship Online: September 2007

DOI: 10.1093/acprof:oso/9780199208784.001.0001

Show Summary Details
Page of

PRINTED FROM OXFORD SCHOLARSHIP ONLINE (www.oxfordscholarship.com). (c) Copyright Oxford University Press, 2017. All Rights Reserved. Under the terms of the licence agreement, an individual user may print out a PDF of a single chapter of a monograph in OSO for personal use (for details see http://www.oxfordscholarship.com/page/privacy-policy).date: 19 November 2017

Sexual size dimorphism in spiders: patterns and processes

Sexual size dimorphism in spiders: patterns and processes

Chapter:
(p.71) Chapter 7 Sexual size dimorphism in spiders: patterns and processes
Source:
Sex, Size and Gender Roles
Author(s):

Matthias W. Foellmer

Jordi Moya-Laraño

Publisher:
Oxford University Press
DOI:10.1093/acprof:oso/9780199208784.003.0008

This chapter uses data for 489 spider species from fifteen families to describe patterns of variation in sexual size dimorphism (SSD), and to evaluate hypotheses explaining these patterns. The direction and magnitude of SSD is found to depend strongly on the size measure chosen, and the use of carapace width is recommended because it is less affected by condition than body mass or length. Comparative analyses reveal that spiders do not exhibit allometry consistent with Rensch's rule. Instead, females appear to have diverged more than males over evolutionary time, and male and female body size show uncorrelated co-evolution, which is unusual for animals. Only two adaptive hypotheses — fecundity selection favouring large size in females and gravity selection favouring small size in males — have general explanatory power for patterns of SSD in spiders. However, processes may differ among species and comprehensive studies of selection within given species are needed.

Keywords:   allometry, fecundity selection, gravity hypothesis, Rensch's rule, sexual size dimorphism

Oxford Scholarship Online requires a subscription or purchase to access the full text of books within the service. Public users can however freely search the site and view the abstracts and keywords for each book and chapter.

Please, subscribe or login to access full text content.

If you think you should have access to this title, please contact your librarian.

To troubleshoot, please check our FAQs , and if you can't find the answer there, please contact us .