News Round-Up

Stickleback study reveals ‘parallel’ evolution

Source: exeter.ac.uk

Animal species in different parts of the world can evolve in “parallel” in response to similar conditions, according to a new study of fish.

Researchers examined separate populations of sticklebacks across two continents and found striking evidence of parallelism.

Sticklebacks provide a powerful “natural experiment” to test parallelism because they descend from marine fish (some still live in oceans) but some have adapted to freshwater environments across the northern hemisphere. MORE