mchambers
Former CCA member
Interesting review in the local paper today, on a book about evolution. Here's the passage that is about fish, including cichlids:
"Working in Trinidad in the 1970s, zoologist John Endler moved guppies from streams dense with pike cichlids, “a streamlined torpedo with teeth that makes its living eating guppies,” to other streams containing killifish, which take a far more lackluster approach to consuming guppies. In a mere two years, the guppies evolved from drab-colored with small spots to colorful with larger spots in response to the great lessening of predation pressure."
https://www.washingtonpost.com/outl...2d00a47778f_story.html?utm_term=.ebd95bc67ee2
"Working in Trinidad in the 1970s, zoologist John Endler moved guppies from streams dense with pike cichlids, “a streamlined torpedo with teeth that makes its living eating guppies,” to other streams containing killifish, which take a far more lackluster approach to consuming guppies. In a mere two years, the guppies evolved from drab-colored with small spots to colorful with larger spots in response to the great lessening of predation pressure."
https://www.washingtonpost.com/outl...2d00a47778f_story.html?utm_term=.ebd95bc67ee2