The trials encourage fishermen to fish more selectively and land all of what they catch.
Twelve vessels took part in the scheme in the North Sea in 2013. They were awarded additional quota for North Sea cod and had an obligation to land and count all catches of cod against quota.
They were also fitted with electronic monitoring systems with CCTV to observe and record fishing activity.
The report details how the practice is proving a successful, alternative method of managing fisheries.
Results for the 2013 trials show an overall estimated discard rate of North Sea cod of 0.03 per cent (496kg) from a total sampled catch of 1452 tonnes.
Julian Roberts, Catch Quota Trials Manager for the MMO, said: “We’d like to thank fishermen involved in the trials. I’m pleased to report continued involvement from the fishing industry in the scheme - participant levels have increased from 11 to 14 vessels since the start of 2014.”
The trials are providing the MMO with a better understanding of how a ban on discarding fish may work in practice is. Findings are being used by Defra to inform work on the reform of the Common Fisheries Policy.