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 ...

Some species of fish can evolve their egg-laying habits in response to predators in the area in order to survive, according to new research. Some species of fish can evolve their egg-laying habits in ...

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 reproductive ...

A whole-lake experiment reveals that a common wastewater pollutant can dramatically alter the behavior of wild male fathead ...

Polar fish experience lower mortality than tropical fish, allowing them to delay reproduction until later in life when they are larger and can produce more eggs, according to a study by Mariana ...

Japan is an island nation surrounded by the ocean. Fish are deeply familiar to us, yet they hold many mysteries and possibilities—from their ability to change sex depending on environmental conditions ...

Since 2011, we have collected over 21,000 gonad samples from 39 groundfish species and work collaboratively across seven sampling platforms. Why is reproduction important to study? Reproduction is a ...

Seasonal hypoxia, when dissolved oxygen concentrations in water drop below 2 milligrams per liter, is a normal summer occurrence in estuaries. Over the past 20 years, however, pollution has increased ...

See more of our trusted coverage when you search. Prefer Newsweek on Google to see more of our trusted coverage when you search. A mussel has been captured on video flapping its mantle in an attempt ...

A new study by the Shedd Aquarium has found that the Chicago River system continues to recover from pollution, as evidenced by the fish species that have been spawning in the river system. A report on ...

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. Hokkaido University ...