as parasitic contaminants (35%) or stowaways (14%) (Fig. 6.1b). There are regional
differences in the alien taxa linked to the history and purpose of introductions.
Introductions from other African countries, for example, are mostly fishes introduced to enhance fisheries and for aquaculture, while those introduced from South
Fig. 6.1 (a) Region of origin, (b) pathways and (c) vectors of alien aquatic biota present in
South Africa
160
O. L. F. Weyl et al.
differences in the alien taxa linked to the history and purpose of introductions.
Introductions from other African countries, for example, are mostly fishes introduced to enhance fisheries and for aquaculture, while those introduced from South
Fig. 6.1 (a) Region of origin, (b) pathways and (c) vectors of alien aquatic biota present in
South Africa
160
O. L. F. Weyl et al.