Pinks, like all salmon, are cyclic. Consistent annual returns is a human desire based on the need to control nature and have "consistent" fisheries.

Why not simply accept that the runs annually vary and work with that? Some of the reasons, like overfishing of the broodstock, can be controlled. Others, like cyclic ocean conditions, happen and we should learn live with them.

Some, like changing climate, are warnings of the future and represent conditions to which the fish are unable to adapt.