The Queensland industry collapsed in the 1970s due to a shortage of wild shell stocks; possible causes included overfishing for shell, incursions of prawn trawling operations onto pearling grounds, and reported pollution from a shipwrecked oil tanker.
The Queensland industry collapsed in the 1970s due to a shortage of wild shell stocks. Possible causes included overfishing for shell, incursions of prawn trawling operations onto pearling grounds, and reported pollution from a shipwrecked oil tanker.