Most upwellings are coastal, and many of them support some of the most productive fisheries in the world.

Vega Reservoir is a productive fishery with numerous species of trout.

However, productive wild fisheries also exist in open oceans, particularly by seamounts, and inland in lakes and rivers.

Such way stations serve up fresh fin- and shellfish from some of the country's most productive coastal fisheries.

"If the goal is a productive fishery, we're automatically talking about up to a 70% decline in population across the board," says Deriso.

These projects, created between 1905 and 1920 have fostered a series of highly productive fisheries in the reservoir chain.

The organization advocates for science-based restoration plans that will end overfishing and create sustainable and productive fisheries.

Around its periphery are found the world's most productive fisheries.

However, 2005 research on rockfish shows that large, elderly females are far more important than younger fish in maintaining productive fisheries.

Other potential benefits include improved inland navigation, more productive fisheries and sufficient flows of water to maintain critical ecosystems.