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Microevolution and maternal effects on tadpole Rana temporaria growth and development rate

På svenska

Author

  • Jon Loman

Summary, in English

Can variation in egg size explain the local variation in tadpole growth and development of the common frog Rana temporaria or are other mechanisms, e.g. microevolution, involved? To study this, tadpoles were raised in outdoor tanks. Each tank housed tadpoles from one clutch. Eggs were collected during 2 years from six different ponds and their sizes were measured. Large eggs gave rise to tadpoles that grew and developed faster than those hatched from small eggs. Tadpoles from large eggs thus metamorphosed earlier but, because they grew for a shorter time, size at metamorphosis was not affected by initial egg size. Tadpoles from different ponds differed in strategy; after correcting for egg size effects, tadpoles from some ponds tended to metamorphose earlier and at a larger size than those from others. These ponds occasionally dry out during or before the tadpoles period of metamorphosis. I argue that the detected pond differences are genetically based and represent a case of microevolution.

Publishing year

2002

Language

English

Pages

93-99

Publication/Series

Journal of Zoology

Volume

257

Issue

1

Document type

Journal article

Publisher

Wiley-Blackwell

Topic

  • Biological Sciences

Status

Published

ISBN/ISSN/Other

  • ISSN: 0952-8369