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Marine Produce Australia: Cone Bay Barramundi Aquaculture ...

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Table 8.1 Risk matrix – numbers in cells indicate risk value, the colours/shades indicate risk<br />

rankings (from Fletcher et al. 2004).<br />

Consequence<br />

Likelihood Negligible Minor Moderate Severe Major Catastrophic<br />

0 1 2 3 4 5<br />

Remote 1 0 1 2 3 4 5<br />

Rare 2 0 2 4 6 8 10<br />

Unlikely 3 0 3 6 9 12 15<br />

Possible 4 0 4 8 12 16 20<br />

Occasional 5 0 5 10 15 20 25<br />

Likely 6 0 6 12 18 24 30<br />

Table 8.2 Risk rankings and outcomes (from Fletcher et al. 2004)<br />

Risk rankings Risk values Likely management response Likely reporting requirements<br />

Negligible 0 Nil Short Justification only<br />

Low 1 – 6 None specific Full justification needed<br />

Moderate 7 – 12 Specific management needed Full performance report<br />

High 13 – 18<br />

Possible increases to<br />

management activities<br />

Full performance report<br />

Extreme > 19<br />

Likely additional management<br />

activities<br />

Full performance report<br />

Table 8.3 Summary of issues & risk rankings<br />

Category Issue Consequence Likelihood<br />

Water quality<br />

Sediment<br />

quality<br />

Nutrient enrichment of<br />

water in immediate<br />

vicinity of cages (inside<br />

10m) due to farm<br />

activities<br />

Nutrient enrichment of<br />

water on the aquaculture<br />

site (outside 10m<br />

from cages) due to farm<br />

activities<br />

Nutrient enrichment of<br />

water outside aquaculture<br />

site due to farm<br />

activities<br />

Pollution from chemical<br />

inputs and fuel spills<br />

Nutrient enrichment of<br />

sediment in immediate<br />

vicinity of cages (inside<br />

30m) due to fallout from<br />

farm activities<br />

Nutrient enrichment of<br />

sediment on the<br />

aquaculture site (outside<br />

30m from cages) due to<br />

fallout from farm<br />

activities<br />

Nutrient enrichment of<br />

sediment outside<br />

aquaculture site due to<br />

fallout from farm<br />

activities<br />

Pollution of sediments<br />

from chemical inputs<br />

and fuel spills<br />

Risk<br />

Ranking<br />

Ranking<br />

0 5 0 Negligible<br />

0 0 0 Negligible<br />

1 0 0 Negligible<br />

1 1 1 Low<br />

3 4 12 Moderate<br />

2 1 2 Low<br />

2 0 0 Negligible<br />

1 1 1 Low<br />

Oceanica: <strong>Marine</strong> <strong>Produce</strong> <strong>Australia</strong>: <strong>Cone</strong> <strong>Bay</strong> <strong>Barramundi</strong> <strong>Aquaculture</strong>, Environmental Monitoring & Management Plan 51

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