Dolph Schluter Quotes in The Beak of the Finch
So there is a simple trade-off here for a stickleback. If the fish specializes in the muck, it cannot compete in the open water; if it specializes in the open water, it is outclassed down in the muck. The fish is in much the same position as a finch in the Galápagos, where specializing in big seeds unfits you for the small ones, and specializing in the small seeds unfits you for the big ones.
To Dolph all this evidence powerfully suggests that the colonists in these lakes have altered the course of each other's evolution, just as the finches have altered each other's courses in the Galápagos.
Dolph Schluter Quotes in The Beak of the Finch
So there is a simple trade-off here for a stickleback. If the fish specializes in the muck, it cannot compete in the open water; if it specializes in the open water, it is outclassed down in the muck. The fish is in much the same position as a finch in the Galápagos, where specializing in big seeds unfits you for the small ones, and specializing in the small seeds unfits you for the big ones.
To Dolph all this evidence powerfully suggests that the colonists in these lakes have altered the course of each other's evolution, just as the finches have altered each other's courses in the Galápagos.
