The ISS papers can be accessed here (under "publications"). Kimon de Greef's paper can accessed here. All three papers are a must read.
The ISS paper by Khalil Goga perhaps best summarises the state of abalone poaching as follows:
"Criminal governance in the abalone trade thus takes various intersecting forms. These include the marginalised turning to the informal economy in the wake of lack of opportunity; both abalone wholesalers and gangsters developing a level of power over a region that renders them parallel sources of authority; the corruption and co-opting of state officials; and, arguably, the state’s reliance on the seizure of poached abalone."