I would suspect fishermen. The gulf has been devastated recently through overfishing then the BP spill as well as another chronic spill that has now released more oil than the BP/DWH spill. The Responsible Party refuses to acknowledge their role and stop the spill. The rate of release is less, but has been going for a long time. Add to this the growing dead zone from all the industrial, agricultural runoff as well as fertilizer from yards (grass now biggest US crop, and a neighbor of mine used to fertilize more than I mowed).
Thanks for helping Sea Shepherd. I just had a 15 minute conversation with Defenders of Wildlife last night. They called for more donations and I told them while I love their group the vaquita was at a critical stage and I was disappointed in them and other major environmental groups for ignoring the crisis.
The Sea Shepherd boats are carrying Mexican Navy personnel and I'm not sure of the agreement they have together. SSCS has a non-violence policy, but I would think that a hired marksman to take out the outboard motors of the pangas would be a great way of stopping them. Also I thought they should carry paintball guns to help repel boarders.
But the level of violence is also an indication of a level of desperation, so maybe the fishermen will give up especially with new law enforcement actions promised by new Mexican government just elected.
I was too busy to post the article and still want to, but an end of season survey last year was cautiously optimistic as they saw as many vaquitas at the end as they did at the beginning of the season. They will hang out in very shallow water and not all the waters are covered by listening devices, so I am praying there is a remnant population somewhere that hasn't been counted that will allow them to recover.
The situation is so desperate that I wish these posts would get as much attention as the latest cute puppy clip or the latest slam one way or another in the primaries. Maybe I should come up with a very inflammatory post title, write about the vaquita and put "made you look" at the end?