Because agonistic behaviour can increase an individual's risk of predation, natural selection should favour individuals that modify their behaviour in the face of predation hazard in ways that ...

We investigated male mate preferences in relation to the perceived risk of sperm competition in the guppy (Poecilia reticulata), a freshwater fish with a promiscuous mating system. Our laboratory ...

We've seen in our simulations that the more brightly colored a male guppy is, the more likely he will be seen -- and eaten -- by a predator. In a simulation or in the wild, where predators are ...

LONDON — When it comes to mating, guppies treasure their ugly friends -- because they look so good by comparison. An article published today by Britain's Royal Society says that male guppies prefer to ...

Male guppies have an extraordinary diversity of colors. They found that the more colorful males were up to two times more sexually active, performing for females for longer periods of time and at a ...

Best girlfriends might never let a man come between them — unless they're Trinidadian guppies. Among these fish, the presence of a harassing male can disrupt female social networks, causing ...

A new study demonstrates a female preference for rare males using an experiment in a wild population, rather than a laboratory setting. When it comes to choosing a mate, female guppies don't care ...

In a new study, researchers found that female guppies often choose a mate that physically stands out from the rest of the pack because of a common type of learning called habituation. Through ...

Guppies have been a separate species for 500,000 years, and during that time their color has changed drastically. But one thing has stayed the same: an orange patch on males. This is quite possibly ...

It turns out color isn't just fashionable for guppies: According to a new UBC study, the more orange a male, the more virile it is. Subscribe to our newsletter for the latest sci-tech news updates.

Female guppies love a man that sticks out. Or at least they do in the lab. When scientists study the reproduction of the popular aquarium guppy in the laboratory, they often see something called ...

A properly dressed male guppy, with its gaudy blue spots and brilliant splashes of orange, can't help but stand out. But for a fish that spends its life swimming among predators, it seems that good ...