Oysters as vectors of marine aliens, with notes on four introduced species associated with oyster farming in South Africa

  • TM Haupt
  • TB Robinson
  • AFG Tonin

Abstract

Translocated oysters are well known to act as vectors of marine alien species, but to date this topic has received scant attention in South Africa, despite the fact that oysters have been imported into this region since 1894. Surveys of oyster farms in South Africa revealed four newly-recorded alien species: the black sea urchin, Tetrapygus niger, from Chile; the European flat oyster, Ostrea edulis (thought to be extinct since its intentional introduction in 1946); Montagu’s crab, Xantho incisus, from the North Eastern Atlantic seas of Europe, and the brachiopod Discinisca tenuis from Namibia. Oyster imports are the most likely vector of all these species. The biological attributes of each species, the possible threats posed by their introduction, and the needs for additional control measures to limit or prevent further introduction and spread of alien species via oyster culture are discussed.

African Zoology 45(1): 52–62 (April 2010)

Author Biographies

TM Haupt

Centre for Invasion Biology and Marine Biology Research Centre, University of Cape Town, Rondebosch, 7700 South Africa

TB Robinson
Centre for Invasion Biology and Marine Biology Research Centre, University of Cape Town, Rondebosch, 7700 South Africa
AFG Tonin
Striker Fishing (Pty) Ltd, P.O. Box 558, Saldanha Bay, 7395 South Africa
Published
2017-04-29
Section
Articles

Journal Identifiers


eISSN: 2224-073X
print ISSN: 1562-7020