Habitat is (at least was) not the driver when the Chinook, pink, chum, and LW sockeye escapement goals were set by WDF. They are all averages. Chum was the highest 3 years in the days base. They have no relationship to habitat.

As I have noted before, when WDF set the Chinook goals they clearly stated that these goals would not utilize the available habitat. When chum escapements significantly increased in the 80s and 90s, valuations by WDF using the Ricker Curve, showed that the MSY goal should be raised as productivity went up with the escapements. The sockeye goal was "experimental", based on some recent escapements. When WDF discovered that they had miscalculated the number and it should have been 400-500K instead of 350, they left it at 350.