出版社：Government of Western Australia / Department of Fisheries
摘要：As an island continent, Australia is heavily dependent upon maritime transport with over 95%
of its imports and exports transported by ship (Australian State of the Environment Committee,
2001). With about one third of Australia¡¯s coastline, Western Australia ranks fourth of the six
states and territory in the number of known non-indigenous marine species.
In this study fifteen ports in Western Australia were assessed on the potential for non-indigenous
marine species to become introduced through ballast water and biofouling. The overall vesselmediated
incursion risk to Western Australian ports was calculated by summing the relative
incursion threat posed by visits to each port (using 2006 port data). The relative threat value of
these visits was determined by a set of uniformly applied criteria. These comprised:
. The number of vessels visiting the port;
. Their port of origin (domestic or international);
. The volume and source of ballast water discharged in each port;
. The dead weight tonnage (DWT – as a proxy for hull fouling potential); and
. The type of vessels visiting each port.
Using the criteria outlined above, the three ports at most risk of non-indigenous marine species
introductions are:
. Dampier;
. Fremantle; and
. Port Hedland.
The rankings of each port in this study are consistent with results from the National Introduced
Marine Pest Coordination Group (NIMPCG, 2006) study, which ranked all ports across
Australia (based on data for 1998-2004).
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