“We observed around 29,000 fruit flies over this period to see if evolution had modified their tendency to move towards or away from crowded regions. Not only did we find a sharp change in this behaviour owing to evolution, but a crucial discovery was that the dispersal rates of males and females had changed completely,” observes Prof. Dey, adding while females had been dispersing more than the males initially, the males overtook females in movement after evolution.
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Unknown titleecomes difficult,” says Prof. Dey. The team first “evolved” tens of thousands of fruit flies for over 75 generations (or three years), thus making them “better” dispersers than their ancestors. <span>“We observed around 29,000 fruit flies over this period to see if evolution had modified their tendency to move towards or away from crowded regions. Not only did we find a sharp change in this behaviour owing to evolution, but a crucial discovery was that the dispersal rates of males and females had changed completely,” observes Prof. Dey, adding while females had been dispersing more than the males initially, the males overtook females in movement after evolution. He said that this finding was perhaps the first evidence for an evolutionary reversal in the dispersal of the two sexes. Prof. Dey says that by establishing that these behaviours are ev Summary
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