Fishing for Sustainable Practices to Conserve Fisheries

Global fish production has reached an all-time high, according to Nourishing the Planet’s research for the Worldwatch Institute’s Vital Signs Online publication.

Aquaculture, or fish farming—once a minor contributor to total fish harvest—increased 50-fold between the 1950s and 2008 and now contributes nearly half of all fish produced worldwide.

According to the U.N. Food and Agriculture Organization an estimated 53 percent of fisheries are considered fully exploited—harvested to their maximum sustainable levels—with no room for expansion in production. Population growth and a higher demand for dietary protein are putting increasing pressure on depleted stocks and threatened ecosystems.

Increased farming of large predators, such as salmon and tuna, has led to overfishing of prey fish—including anchoveta and herring, which are commonly used as fishmeal. It generally takes at least three kilograms of feed to produce one kilogram of salmon. The shrinking of the numbers of prey species threatens the entire food chain, putting further stress on large predator stocks.

Depleting fisheries also negatively affect the economies of developing countries, home to the nearly 60 percent of the world’s fishers that are classified as small-scale commercial or subsistence fishers. Continued...

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