Management of invasive fish - Invasive Species Management - page 204

in recent years. The invasive fi sh risk identifi cation and assessment protocol of
Copp et al . (2005b), the quantitative invasion model of Gertzen et al . (2008), and
the Carpsim software (Department of Primary Industries 2008) to simulate the
expected outcomes of a range of control options are excellent examples of new
tools applicable to the integrated pest management of fi shes. The control of Nile
perch impacts in one of the world's largest freshwater lakes and the potential for
eradication of common carp from large lakes in Tasmania illustrate that control is
feasible given the possibility to derive economic benefi ts from a non-indigenous
fi shery or the political and economic will to tackle the problem, respectively.
The relatively poor dispersal abilities of freshwater fi shes compared to other types
of organisms should signifi cantly assist in controlling the spread and enhance
the potential for the eventual eradication of invasive fi sh, particularly if exciting
new control options such as the genetic daughterless technology can eventually
be applied. Unfortunately the increasing trade in live fi sh and expanding fi nfi sh
aquaculture, both of freshwater and marine species, and for ornament and food,
and the continued deliberate human-assisted dispersal of non-indigenous fi shes
for sport and commercial benefi t will continue to homogenize fi nfi sh biodiver-
sity, and greatly increase the ecological and economic damage attributable to this
group of organisms. The global problem of invasive fi shes will only get worse
while many countries lack effective legislation to control the introduction and
spread of non-indigenous species.