Pig poo helps feed fish

A South Australian researcher is turning pig poo into fish food for the aquaculture industry.

Biotechnologist Andrew Ward breaks down pig waste, turning it into nutrients to feed water fleas, which then become fish feed.

This can also be done with other waste, from places like wineries and abattoirs.

Dr Ward says the process simulates what already happens out at sea.

"Basically reproducing what happens in nature - first you grow the algae, then you feed it to the zooplankton and then to the fish, very much like what happens out in the natural environment," he says.

"We just pick the things that are most productive and maximise the productivity of them to make it commercially viable."