Agricultural contaminant impacts fish reproductive behaviour

A common growth-promoting hormone used worldwide in the cattle industry has been found to affect the sexual behaviours of fish at a very low concentration in waterways – with potentially serious ecological and evolutionary ...

Guppies and sexual conflict? It's a genital arms race

(Phys.org) —It's not always easy to tell if a fish is male or female: they look more or less the same. But there are exceptions, such as guppies and, as with humans, guppy genitalia varies in size across the species.

Fish prone to melanoma get DNA decoded

Scientists at Washington University School of Medicine in St. Louis and elsewhere have decoded the genome of the platyfish, a cousin of the guppy and a popular choice for home aquariums. Among scientists, the fish are meticulously ...

Bisexual fish boost mating chances

In an unusual mating strategy, hard-up males of a tiny, promiscuous fish species engage in homosexual acts in a bid to entice females to copulate with them, a study said Wednesday.

Females choose sexier friends to avoid harassment

(PhysOrg.com) -- Scientists have observed a strategy for females to avoid unwanted male attention: choosing more attractive friends. Published today (7 December) in the journal Proceedings of the Royal Society B, the study ...

Single wild female

(PhysOrg.com) -- The release of a single female guppy into the wild can generate entire new populations, even with no males present, according to new research.

From arc to park

(PhysOrg.com) -- Parasite infections are an important threat in conservation biology, particularly to individuals that have been bred in captivity for release into the wild.

page 2 from 2