Computing and Library Services - delivering an inspiring information environment

Competition strategies and correlated selection on responses to polyandry in the seed beetle Callosobruchus maculatus

Geudes, Raul Narciso C. and Smith, Robert H. (2008) Competition strategies and correlated selection on responses to polyandry in the seed beetle Callosobruchus maculatus. Physiological Entomology, 33 (4). pp. 372-381. ISSN 03076962

Metadata only available from this repository.


Polyandry reflected in multiple mating with different mates is regarded as favoured by natural selection in males but not necessarily in females, where conflicting effects on fitness components can occur. The present study aims to provide empirical evidence to predict which fitness components may be affected in this sexual conflict using a species that demonstrates potential between-population variation in their resolution: the cowpea weevil Callosobruchus maculatus. Two strains showing contrasting competition outcomes (scramble × contest) and contrasting life-history strategies based on trade-offs between longevity and fecundity are crossed for subsequent selection based on larval-competition strategy, expecting the production of a correlated response to multiple (polyandrous) mating. Such a response is expected because the scramble strain shows high fecundity (and lower longevity) and would benefit from multiple mating, in contrast with the contest strain, which shows high juvenile mortality. The scramble-selected lines would evolve a response of increased fecundity and reduced longevity under multiple and potentially polyandrous mating but the contest-selected lines would not respond to multiple (polyandrous) mating. Instead, both scramble- and contest-selected lines show increased fecundity and reduced longevity with multiple (polyandrous) matings, which did not affect egg weight. Indirect benefits of multiple (polyandrous) mating appear to be relevant for lines showing contest competition among juveniles.

Item Type: Article
Subjects: Q Science > Q Science (General)
Q Science > QH Natural history
Schools: School of Applied Sciences
Related URLs:
Depositing User: Graham Stone
Date Deposited: 25 Feb 2009 10:38
Last Modified: 28 Aug 2021 10:44


Downloads per month over past year

Repository Staff Only: item control page

View Item View Item

University of Huddersfield, Queensgate, Huddersfield, HD1 3DH Copyright and Disclaimer All rights reserved ©