Clouded Yellow survive UK winter

[Morten DD Hansen]

Nigel Venters wrote:

> Good point except how could selection act against migration if no genes
> from the migrants ever returned to the gene pool?
> Nigel
>

Indeed many migratory genes return to the gene pool. According to Benvenuti's
work on red admirals in Italy, there are strong migrations towards south in the
autumn and smaller migrations towards north in spring. Autumn migrants in Italy
have a fair chance of contributing to next year's generation.

kind regards
Morten DD

--
Morten DD Hansen, stud. scient.
Dept. of Zoology, Institute of Bioloical Sciences
Building 135, University of Aarhus
Universitetsparken, DK-8000 Aarhus C
Telephone: +45 8942 2695
e-mail: biomddh at biology.au.dk

homepage on migrating birds and butterflies:
http://www.biology.au.dk/~biomddh/