期刊
EVOLUTION
卷 66, 期 10, 页码 3277-3286出版社
WILEY
DOI: 10.1111/j.1558-5646.2012.01672.x
关键词
Assortative mating; premating isolation; asymmetric mate choice; rapid evolution; speciation
资金
- National Science Foundation (NSF) [DEB 0320076, 0422687, 0522059, 0618551, DEB 0211391, 0322818]
- National Institute of General Medical Sciences of the National Institutes of Health [P20GM103395]
- Division Of Environmental Biology
- Direct For Biological Sciences [0919184, 0322818] Funding Source: National Science Foundation
We used no-choice mating trials to test for assortative mating between a newly derived resident-freshwater population (822 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.
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