Deal will restrict fishing near colonies on Robben Island and Bird Island for 10 years, after long debate between industry and conservationists

Efforts to stop the critically endangered African penguin from going extinct took a step forward on Tuesday after South African conservationists and fishing industry groups reached a legal settlement on no-fishing zones around six of the penguins’ major breeding colonies.

Sardine and anchovy fishing will not be allowed for 12 miles (20km) around the penguin colony off Cape Town on Robben Island, where Nelson Mandela was imprisoned, and Bird Island, across the bay from Gqeberha, also known as Port Elizabeth. There will be more limited closures around four other colonies, according to a court order formalising the agreement.