The Indian Ocean Tuna Commission (IOTC) needs to impose stricter controls to protect tuna stocks, as it fails to control fishing fleets and prevent illegal fishing, Greenpeace said on Friday.

"The IOTC is failing to control fishing fleets and to prevent and combat illegal fishing. The most effective measure that the IOTC members meeting in Mauritius can adopt is to ban all transshipments of fish at sea," said Sari Tolvanen, Greenpeace International oceans campaigner in Mauritius.

"Only by making the vessels come to port can authorities adequately inspect vessels and the fish they catch.