John Grehan jrg13 at psu.edu
Wed Sep 9 10:15:27 EDT 1998

>Dear Leplist,
>The empirical work of Susan Harrison on checkerspots in California
>serpentine habitats and Ilkka Hanski on the Glanville fritillary supports
>an important role for migration in maintaining widespread patchy
>populations of butterflies. See Thomas and Hanski 1997 In Hanski and
>Gilpin 1997, Metapopulation Biology.
>patrick foley
>patfoley at csus.edu

The empirical work might support an important role for checkerspot wings
in migration and maintaining widespread patchy populations, but this empirical
observation does not say anything about whether that function is the purpose of
the wings, or indeed whether the wings have a purpose at all.

John Grehan

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