Tassal wants to put an industrial fish farm in Okehampton Bay on Tasmania’s East Coast. This 28-pen farm will grow 800,000 Atlantic Salmon. These fish are fed an omnivore diet of land mammals, vegetable meal and pelagic fish. In other words, they eat what we eat and what goes in one end has to come out the other. 800,000 fish taking a crap is about the same as 10,000 humans taking a dump in the bay – every day.
This is really out-dated business behaviour.
In the Northern Hemisphere salmon companies are either: moving on-shore and farming in closed systems that catch and recycle all the waste; or farming off-shore, far away from coastal communities. They are also switching to feeds that don’t produce the high volumes of waste that have contributed to the devastation of Macquarie Harbour.