BISMARCK — North Dakota Game and Fish fisheries biologists spend a lot of time in fall surveying district lakes and the Missouri River System in North Dakota looking for natural fish reproduction, ...

Parental egg-care in fish traps them in an evolutionary dead-end through the loss of the chorion-hardening system, according to scientists from the Institute of Science Tokyo. Fish have diverse ...

Not all fish play by the same reproductive rules. Evolutionary biology reveals how deception became a successful mating ...

Even accounting for their proportionate size, bigger female fish produce many more offspring than smaller fish, a new study reveals. The results hold implications for fisheries managers, since climate ...

A DNA probing technique clarifies the mechanism behind clonal reproduction of female dojo loach fish, also providing insight into the ancestral origin of the clonal population. A DNA probing technique ...

In mosquitofish, of the genus Gambusia, male fish are smaller than females -- sometimes only half the size. Biologists had previously assumed that smaller male mosquitofish had at least some ...

There is a whole lot of plastic pouring into the ocean every day, and whole lot we don't know about the damage it causes. Looking to fill in these blanks is a team of Duke University scientists, who ...

The level of male and female sex hormones in the largemouth bass that didn’t spawn last year on a state fish farm near Lake Griffin were off kilter and in many cases reversed. But researchers for the ...

Long-term exposure to pharmaceutical pollutants may be dramatically altering fish behavior, impacting their ability to reproduce and survive, according to research led by scientists from Monash ...