Truck and Barter

Via Knowledge Problem and Cold Spring Shops, comes a WaPo article describing how India's sardine fishermen are using cell phones to find the best prices for their catch. Middlemen are not pleased:

the dealers don't necessarily like the new balance of power, but they are paying better prices

Depending on the structure of this market, these higher prices to fishermen -- yielding at least one case of a tripling of income for a boat operator -- should induce them to fish a little more, or induce others to enter the market, and this will have a further "ripple effect" on the Sardine market -- an increase in aggregate supply, yielding lower prices to end consumers.

As much as the middlemen don't like the new balance of power, presumably the sardines like it even less -- especially if short-run supply can be expanded past the sustainable possibility-frontier into over-fishing.

Does anybody have an idea where one can get reliable information about prices and quantites for these markets?