Bean Beetle Home Page Home

Bean Beetle Literature Database for Ecology, Evolution, and Animal Behavior

Bean Beetle Home Page |  Bibliography Home |  Show All |  Simple Search |  Advanced Search
Quick Search:
1-1 of 1 record found matching your query:
toggle visibility Search & Display Options
Select All    Deselect All << 1 >>
List View
 | 
Citations
 | 
Details
   print
  Record Links
Author (up) Rankin, D.J.; Arnqvist, G. url  doi
openurl 
  Title Sexual dimorphism is associated with population fitness in the seed beetle Callosobruchus maculatus Type Journal Article
  Year 2008 Publication Evolution; International Journal of Organic Evolution Abbreviated Journal Evolution  
  Volume 62 Issue 3 Pages 622-630  
  Keywords Analysis of Variance; Animals; Beetles/*physiology; Body Weights and Measures; Mating Preference, Animal/*physiology; Pigmentation/physiology; Population Density; Regression Analysis; *Sex Characteristics; Survival Analysis  
  Abstract The population consequences of sexual selection remain empirically unexplored. Comparative studies, involving extinction risk, have yielded different results as to the effect of sexual selection on population densities make contrasting predictions. Here, we investigate the relationship between sexual dimorphism (SD) and population productivity in the seed beetle Callosobruchus maculatus, using 13 populations that have evolved in isolation. Geometric morphometric methods and image analysis are employed to form integrative measures of sexual dimorphism, composed of variation in weight, size, body shape, and pigmentation. We found a positive relationship between SD and adult fitness (net adult offspring production) across our study populations, but failed to find any association between SD and juvenile fitness (egg-to-adult survival). Several mechanisms may have contributed to the pattern found, and variance in sexual selection regimes across populations, either in female choice for “good genes” or in the magnitude of direct benefits provided by their mates, would tend to produce the pattern seen. However, our results suggest that evolutionary constraints in the form of intralocus sexual conflict may have been the major generator of the relationship seen between SD and population fitness.  
  Address Laboratory of Evolutionary and Ecological Dynamics, Department of Biological and Environmental Science, University of Helsinki, Helsinki, Finland. daniel.rankin@esh.unibe.ch  
  Corporate Author Thesis  
  Publisher Place of Publication Editor  
  Language English Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0014-3820 ISBN Medium  
  Area Expedition Conference  
  Notes PMID:18182072 Approved no  
  Call Number Centenary @ gbutcher @ Serial 100  
Permanent link to this record
Select All    Deselect All << 1 >>
List View
 | 
Citations
 | 
Details
   print
toggle visibility
Save Citations:
Export Records:
Home Library Search  |  Show Record  |  Extract Citations
This website is supported by National Science Foundation Grants, DUE-0535903, DUE-0815135, DUE-0814373, DUE-1821533, and DUE-1821184 to Morehouse College and Emory University, Atlanta, Georgia, USA. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the authors and do not necessary reflect the views of the National Science Foundation, Emory University, or Morehouse College. Copyright © by Lawrence S. Blumer and Christopher W. Beck, 2008-2014. All rights reserved. The content of this site may be freely used for non-profit educational purposes, with proper acknowledgement of the source. All other uses are prohibited without prior written permission from the copyright holders.