... Differences in the relativeabundances of banded and unbanded morphs be-tween mainland and island populations, and amongyoung-of-the-year, juvenile, and adult individuals,suggest that ... Themesulations in and near Sweden, Forsman (1995) foundthat the relative performance of these two morphsdiffered between males and females. In male snakes,the black form suffered ... of Oxford University Press.Library of Congress Cataloging-in-Publication DataEvolutionary ecology : concepts and case studies / edited by Charles W. Fox, Derek A.Roff, and ...