Salmonidae
Oncorhynchus
mykiss
Rainbow Trout
N. America Fisheries Release
1897
I
MI
Marr et al. (2017)
Salmonidae
Salmo trutta
Brown Trout
Eurasia
Fisheries Release
1890
I
MI
Weyl et al. (2017a)
Siluroideii
Pterygoplichthys
disjunctivus
Vermiculated Sailfin Catfish S. America Pet trade Escape
2000
I
DD
Marr et al. (2017)
Entries in the column on introduction status
are either (N) naturalised but not invasive or (I) invasive. The column on impact status is based on the EICAT scheme as
Major (MA)—the species causes the local or population extinction of at least one native species, and leads to reversible changes in the structure of communities and
the abiotic or biotic composition of ecosystems; Moderate (MD)—the species causes declines in the population densities of native species, but no changes to the
structure of communities or to the abiotic or biotic composition of ecosystems; Minor (MI)—the species causes reductions in the
fitness of individuals in the native
biota, but no declines in native population densities, and has no impacts that would cause it to be classified in a higher impact category; Minimal Concern—the
species is unlikely to have caused deleterious impacts on the native biota or abiotic environment. Data Deficient (DD)—species where there is either inadequate
information to classify the species with respect to its impact, or insufficient time has elapsed since introduction for impacts to have become apparent; Not Evaluated
(NE)—a species is Not Evaluated when it has not yet been evaluated against the criteria
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159
Oncorhynchus
mykiss
Rainbow Trout
N. America Fisheries Release
1897
I
MI
Marr et al. (2017)
Salmonidae
Salmo trutta
Brown Trout
Eurasia
Fisheries Release
1890
I
MI
Weyl et al. (2017a)
Siluroideii
Pterygoplichthys
disjunctivus
Vermiculated Sailfin Catfish S. America Pet trade Escape
2000
I
DD
Marr et al. (2017)
Entries in the column on introduction status
are either (N) naturalised but not invasive or (I) invasive. The column on impact status is based on the EICAT scheme as
Major (MA)—the species causes the local or population extinction of at least one native species, and leads to reversible changes in the structure of communities and
the abiotic or biotic composition of ecosystems; Moderate (MD)—the species causes declines in the population densities of native species, but no changes to the
structure of communities or to the abiotic or biotic composition of ecosystems; Minor (MI)—the species causes reductions in the
fitness of individuals in the native
biota, but no declines in native population densities, and has no impacts that would cause it to be classified in a higher impact category; Minimal Concern—the
species is unlikely to have caused deleterious impacts on the native biota or abiotic environment. Data Deficient (DD)—species where there is either inadequate
information to classify the species with respect to its impact, or insufficient time has elapsed since introduction for impacts to have become apparent; Not Evaluated
(NE)—a species is Not Evaluated when it has not yet been evaluated against the criteria
6 Alien Freshwater Fauna in South Africa
159