MSY really has nothing to do with biology. It is basically an economic evaluation; what is the minimum investment (spawners) for the maximum return (dead fish in the boat). It looks at a single stock as if that stock exists totally independent of the ecosystem. Further, it is backward-looking. If, for example, the ocean becomes less productive because pinniped predation (Larry's favorite) an MSY analysis will only show that escapement is not producing human catch. So, lower the goal.

Further, we know that the ocean has long-term cycles; longer than PDO. These are ignored too.

Using MSY we'll continually lower the goals and keep on fishing.