PARTIAL REPRODUCTIVE ISOLATION OF A RECENTLY DERIVED RESIDENT-FRESHWATER POPULATION OF THREESPINE STICKLEBACK (GASTEROSTEUS ACULEATUS) FROM ITS PUTATIVE ANADROMOUS ANCESTOR
Article first published online: 14 MAY 2012
© 2012 The Author(s). Evolution© 2012 The Society for the Study of Evolution.
Volume 66, Issue 10, pages 3277–3286, October 2012
How to Cite
Furin, C. G., von Hippel, F. A. and Bell, M. A. (2012), PARTIAL REPRODUCTIVE ISOLATION OF A RECENTLY DERIVED RESIDENT-FRESHWATER POPULATION OF THREESPINE STICKLEBACK (GASTEROSTEUS ACULEATUS) FROM ITS PUTATIVE ANADROMOUS ANCESTOR. Evolution, 66: 3277–3286. doi: 10.1111/j.1558-5646.2012.01672.x
- Issue published online: 1 OCT 2012
- Article first published online: 14 MAY 2012
- Accepted manuscript online: 21 APR 2012 12:30PM EST
- Received August 9, 2011, Accepted March 19, 2012
- Assortative mating;
- premating isolation;
- asymmetric mate choice;
- rapid evolution;
We used no-choice mating trials to test for assortative mating between a newly derived resident-freshwater population (8–22 generations since founding) of threespine stickleback (Gasterosteus aculeatus) in Loberg Lake, Alaska and its putative anadromous ancestor as well as a morphologically convergent but distantly related resident-freshwater population. Partial reproductive isolation has evolved between the Loberg Lake population and its ancestor within a remarkably short time period. However, Loberg stickleback readily mate with morphologically similar, but distantly related resident-freshwater stickleback. Partial premating isolation is asymmetrical; anadromous females and smaller resident-freshwater males from Loberg Lake readily mate, but the anadromous males and smaller Loberg females do not. Our results indicate that premating isolation can begin to evolve in allopatry within a few generations after isolation as a correlated effect of evolution of reduced body size.