Great article JKM,
I picked up a heap of those Australian Archaeology journals at a second hand book sale a couple of years ago..
Jam packed with this sort of articles. My Arts deg daughter borrowed the lot.
Look for covers with the design the same as in the top of the link.
Heres a Nov 1979 article from AArchaeology titled ' Settlement patterns on offshore islands in Northeastern Queensland'
It describes among other things the Scraggy Point (Hinchinbrook Is.) firsh traps that covered app 20, 000 m2.
The author describes these traps as very complex.
Interestingly there is an acknowledgement for help with research from a Captain Les Hiddens! http://dspace.flinders.edu.au/jspui/bitstream/2328/709/1/1979009018032_FINAL.pdf