OSLO (Reuters) - The amount of fish in the oceans has halved since 1970, in a plunge to the “brink of collapse” caused by over-fishing and other threats, the WWF conservation group said on Wednesday.

Salmon hatcheries, which are meant to boost wild fish numbers, often harm native populations, according to an analysis. Hatcheries breed and raise fish in a controlled, captive setting. They can be a ...

A recent report by the Great Lakes Fishery Commission (GLFC) revealed that populations of parasitic sea lampreys in Lake Superior have surged over the past four years. This spike follows a reduction ...