Sentences with phrase «guppy populations»

The study looked at MHC genetic variation in 59 guppy populations across Trinidad, Tobago, Barbados, and Hawaii.

Back in the lab, Endler proved his hypothesis by creating guppy populations that over just 10 generations adapted to the different environmental challenges and advantages he introduced.

Not exact matches

Researchers in Hawaii found that guppies released in the 1920s drove down native fish populations, perhaps by competing with them for food and living space, and had likely changed the cycle of nutrients in water: Guppy - rich areas showed increased levels of dissolved nitrogen — from ammonium in fish urine and gill excretions — which, in turn, stimulated algae growth.