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Some farmed fish requires fish to feed them, which is unsustainable in itself when you're feeding N pounds of other fish to produce 1 pound of the edible type.

by jon914 16y ago

Some farmed fish requires fish to feed them, which is unsustainable in itself when you're feeding N pounds of other fish to produce 1 pound of the edible type. See: http://www.nicholas.duke.edu/thegreengrok/farmedfish-pnas092009 http://www.nicholas.duke.edu/thegreengrok/farmedfish-pnas092... Recently, I've seen more of a shift to grains, but that reduces the nutritional value of the fish.

netcan 16y ago
Why would shifting to grains reduce the nutritional value of the fish? Is cat more nutritious than lamb?
- jon914 16y ago
  Fish feed consists of small, less desirable fish such as sardines and mackerel. These are rich in omega-3, so shifting to grains reduces the quantity available in the fish.
  - netcan 16y ago
    OK I get it. You didn't mean the nutritional value of a pound of fish.