In a simulation or in the wild, where predators are plentiful, male guppies become increasingly drab over generations, pushed by predation pressure toward greater camouflage. So if camouflage ...
When evolutionary biologist John Endler began studying Trinidad's wild guppies in the 1970s, he was struck by the wide variation among guppies from different streams, even among guppies living in ...
These stunning creatures are a staple in the aquarium hobby, and it’s easy to see what all the fuss is about. Male guppies have amazing color patterns, and many breeds have really fancy fins, too.
It’s a tale of guppies, a five-year investigation, and specifically Prozac and its chief ingredient — fluoxetine. “Even at low concentrations, fluoxetine altered the guppies' body condition ...