A Reuters report on West African piracy, which lays much of the blame on Nigerian gangs, as illustrated by this passage:
Nigerian pirates can make in 10 days what Somalis make in 10 months....It's easier to offload oil to the local black market than negotiate ransom with foreign ship owners.
The usual references to greater regional co-operation, with external (EU) funding for coastguard training. When as a speaker at IISS last week remarked:
The main OCG is the state.
Another contributor pointed to the huge diversion under-way in Nigeria of oil, which can only be explained by systematic and widespread collusion, including purchases by the international oil companies. IIRC 10% of production was missing.

Link To Reuters:http://www.reuters.com/article/2013/...0BIAJ520130529

Link to IISS talk on West African crime and development:http://www.iiss.org/en/events/events...velopment-98fd