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Freshwater Fish At The Top Of The Food Chain Evolve More Slowly

Achilles Tang

By Achilles Tang,
in General Reefkeeping_

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Achilles Tang

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For avid fishermen and anglers, the largemouth bass is a favorite freshwater fish with an appetite for minnows. Once fish evolve the size and speed needed to become top predators, natural selection keeps them in an evolutionary holding pattern, a new study finds. A new study finds that once they evolved to eat other fish, largemouth bass and fellow fish-feeders have remained relatively unchanged compared with their insect- and snail-eating cousins. As these fishes became top predators in aquatic ecosystems, natural selection put the breaks on evolution, say researchers.

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