13.2 The Wallis Lake Estuary Management Committee - Great Lakes ...

Wallis Lake Estuary Management Plan
4.3 Fisheries
F.1
Management Area A, B, C, D, E, F
Management Objective
Protect and enhance key fish habitat areas essential for spawning, shelter, free passage or other reasons
Action
No
F.1.1
F.1.2
Action
Implement action 10.5 of the WLCMP to facilitate free passage of fish by
maintaining or constructing fishways at Locketts Crossing, Clarksons Crossing,
Dargavilles Road Crossing and at the Old Butter Factory Weir at Dyers Crossing
Evaluate the findings of the Manning bioregional assessment conducted by the
Marine Parks Authority in consultation with NSW DPI and Department of
Environment and Conservation
Indicative
Cost
Priority Responsibilities Progress
$150,000 Immediate (B1) WaLI group,
CMA, GLC,
GTCC, DPI,
RTA, DIPNR
Staff time High (A4) WLEMIC, DPI,
DEC
Comments
Fish kills resulting from asphyxiation in the upper Wallamba River have occurred during periods of low flow in summer following algal blooms (see section 2.2.4). Action F.1.1 will
reduce the risk of fish kills occurring in the future by facilitating free fish passage allowing fish to escape from anoxic waters. Reducing the nutrient load available for algal blooms
(which cause the anoxic water conditions when they decompose) will also contribute to this action.
The NSW Government is using a systematic approach to identify new sites for MPAs in NSW waters through a bioregional and site assessment process. The Manning bioregion
(which includes Wallis Lake) was assessed during 2004 for the progressive development of the NSW representative system of MPAs. The results of this assessment may have
consequences for MPAs in Wallis Lake.
The protection of significant wetland areas (see E.1.1) will contribute to this strategy by safeguarding these areas from development pressure and degradation allowing them to
continue to act as nursery areas for species of juvenile fish and crustaceans.
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