not sure about the Willamette Zone but Cormorant population reduction might be coming to the coast:
from the COASTAL MULTI-SPECIES CONSERVATION AND
MANAGEMENT PLAN (CMP) review draft, page 25:
UNDERSTANDING AND MANAGING PREDATION
Predation on adult salmonids by marine mammals and on juveniles by non-native fish,
marine mammals, and avian predators is a matter of significant biological and social
concern. It may possibly be limiting many wild populations and significantly affecting the
angling experience and Oregon’s hatchery fish investment.
The CMP identifies basin-specific actions to address predation, but control of predators is
likely to remain an on-going management concern. Where marine mammals and birds are
concerned, Oregon currently has limited authority to do more than monitor and haze the
animals. Marine mammals are protected and managed under the federal Marine Mammal
Protection Act. Most predacious birds are protected and managed under the international
Migratory Bird Treaty Act. For non-native fish predation, effective means of control have not
been established. Key management actions include:
---Actively pursue research to document impacts to wild and hatchery populations.
---Seek federal permission to engage active predator management wherever such actions
are expected to be effective, including pursue a lethal take permit to manage cormorants.
---Haze predators in cooperation with volunteers.
---Support restoration of habitat that supports salmonids (including for predators of
predators, e.g., bald eagles).
---Control non-native fish to the extent possible.