actually saw the whole clip now
and that shows the whole thing in a little different light.
the whole story was about finding different ways of shrimps trawling that for instance turtles and fish are not caught in the net where they are not being 'needed'. so they introduces new nets with a sort of 'flap' on the side where the more' clever' fish and turtles can escape.
in the philippines for instance the bycatch is not so much a problem as such ( meaning thrown over board) as the trawler's crew are allowed to keep the fish and sell it. so, when using the new nets, with less bycatch the crew are loosing out.therefore the captain pays them a % of the catch and everyone is happy. the little fishes escape, grow. and are eventually caught when the have a decent size...
it is different in mexico( that was the second part) there the crew has to sort them out ( they can't keep the fish) and don't get nothing, except of extra work. so for them the introduction of these nets has advantages. less bycatch, less sorting to do and more time to catch more shrimps...