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Author (up) Messina, F.J. doi  openurl
  Title Predictable Modification of Body Size and Competitive Ability Following a Host Shift by a Seed Beetle Type Journal Article
  Year 2004 Publication Evolution Abbreviated Journal  
  Volume 58 Issue 12 Pages 2788-2797  
  Keywords Cowpea weevils; Size (Biology)/Insects; Competition (Biology)/Insects; Insects/Hosts; Adaptation (Biology)/Insects  
  Abstract The changes in traits of the seed beetle Callosobruchus maculatus in response to a novel legume host were investigated. Geographic populations of C. maculatus exhibit substantial differences in a range of behavioral, morphological, and life-history traits, and some of this variation may reflect adaptation to different legume hosts. Replicate beetle lines were maintained on either the small, ancestral host, mung bean (Vigna radiata), or on a larger, novel host, cowpea (V. unguiculata). The shift to cowpea rapidly modified adult size and the form of larval competition. These changes meant that the cowpea lines converged toward populations chronically associated with cowpea and larger hosts. Thus, a host shift in a simplified environment is enough to produce genetic divergence in fitness-related traits.  
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  Call Number Muhlenberg @ kheiman @ Serial 51  
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