Butchered dolphins, oceanic collapse and the myth of fish farms

Here is a rather horrific and pessimistic article regarding the global state of the once bountiful harvest the oceans provided and some terrible facts around fish farming (aquaculture). It's not a pretty picture:

The fish farms along the British Columbia Coast produce as much waste as the raw sewage from a city with 500000 people. This waste goes untreated into the ocean

Aquaculture appears to promote unwanted parasites in fish due to the fact that the fish are penned in small areas:

A parasite that lives on the skin, eyes and gills of salmon was imported from Sweden to Norway … The parasite quickly spread and killed off many wild salmon runs. To stop the parasite from spreading, many of the 40 rivers that have been infected in Norway are poisoned with a powerful poison called rotenone. It kills off the parasite but also almost all other life in the rivers, and the salmon.

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he interbreeding of wild salmon with escaped farmed salmon is expected to alter the unique genetic makeup of salmon, which allows them to migrate from freshwater to the ocean and back to freshwater to spawn.

Environmental Consequences of Fish Farms

The outlook is bleak:

The "underlying paradox," write the authors, is that "aquaculture is a possible solution but also a contributing factor to the collapse of fisheries stocks around the world."

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