Fishy odor just like dad's

Fathers' scent helps keep two species separate

By Susan Milius, 17:26 PM June 28, 2010

PORTLAND, Ore. — A tendency for daughters to fall for guys that are like their dads helps keep two species of fish from interbreeding.

Two distinct species of the threespine stickleback dart about in several lakes of British Columbia, where the two fishes could easily mate with each other. But they don’t; the slimmer ones, which feed on plankton in open water, mate with their own kind, while the larger, bottom-feeding ones mate with theirs.

Experiments now show that early in life, females ...

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