Konstanz evolutionary biologists working with Prof. Axel Meyer have now described parallel evolution of two closely related, but geographically isolated populations of cichlid fish in Nicaraguan crater lakes. (sciencedaily.com)
The East African cichlid fishes of Lake Malawi are ideal for investigating behavioral adaptation to environment, as within genera, fine - scale niche partitioning has resulted in sympatric sister species that live in definable microhabitats with distinct selection pressures. (genestogenomes.org)
When researchers placed African cichlid fish in a tank, the fish showed identical aggressive behavior whether their opponent was their reflection or another fish across a clear barrier, ramming and biting at both. (sciencemag.org)