Mzansi Afrika

From Johannesburg South Africa, a window on the world

Sunday, March 14, 2004

Alien crabs invade CT harbour

Alien European shore crabs that destroyed the American oyster industry have invaded Cape Town harbour while European mussels are becoming a real threat to oyster and mussel farms on the West Coast and as far east as Port Elizabeth.Marine scientists believe the foreign species of sealife were introduced via ships' ballast water. Now South Africa's battle to stop alien and invasive plants from taking over has been extended to sea-borne incursions. In an effort to combat foreign species landing in local waters and possibly playing havoc with local species, South Africa has signed an international convention to control the quality of ballast water discharged in its ports, said a department of transport spokesperson.