Wamberal Lagoon Catchment Aquatic Survey Final Report (PDF ...

Figure 6. Lower Forresters Creek after lagoon opening.
Both Wyong LGA to the north and Gosford LGA to the south represent a significant
freshwater crayfish distribution area. Though the knowledge base is small there seems
to be a cut off line, roughly running from Bateau Bay, through Narara and then up
through Central Mangrove that represents a species distribution line with one species
(Euastacus spinifer) occurring on both sides, two species (Cherax setosus & Gramastacus
sp) only north of the line and one species (Euastacus australasiensis) only south of the
line. This project will map that line and the distribution of these crayfish species along
the line, and the surrounding region. A scientific manuscript on those findings is proposed.
No crayfish were found close to the lake or in the lowland wetlands that flood periods
may inundate with brackish water. Crayfish were discovered in the higher wetland
areas that are never inundated with brackish water and this may be a concern with
rising salt water levels due to climate change.
Wamberal Lagoon Catchment Report Australian Aquatic Biological P/L 14