| variable assortative mating in replicate mating trials using drosophila melanogaster populations derived from contrasting opposing slopes of 'evolution canyon', israel. | significant assortative mating in laboratory studies has been previously shown between two populations of drosophila melanogaster collected from micro-climactically contrasting and opposing slopes of 'evolution canyon' (lower nahal oren, israel; korol et al., 2000). coupled with evidence that the two populations are adapted to their respective environments, this has been suggested as a rare example of ongoing behaviourally mediated speciation occurring in the face of gene flow. reproductive isol ... | 2005 | 16033586 |