Hazing of double-crested cormorants is set to begin soon in several areas along the Oregon Coast to improve survival of juvenile salmon and steelhead.
Double-crested cormorants are goose-sized, fish-eating waterbirds that occur throughout Oregon, and are particularly prevalent in the state’s estuaries during April through September. Research indicates cormorants may eat significant numbers of juvenile salmon and steelhead that migrate to the ocean during this time.
Hazing will involve driving at the birds in small boats and, in some estuaries, firing near them with small pyrotechnics. Hazing workers are being provided by the Clatsop County Fisheries Project, Port of Nehalem, Port of Bandon, North Coast Salmon and Steelhead Enhancement Fund, and Alsea Sportsmen’s Association.
Hazing will take place as early as April 1 and continue through May 31 in the Nehalem, Nestucca, and Coquille river estuaries and in Tillamook and Alsea bays. The program will continue through July 31 in Astoria, where the Clatsop County Fisheries Project manages a salmon rearing program.
Hazing is designed to disrupt the birds’ feeding patterns long enough to give wild-spawned and hatchery fish a chance to pass through the estuaries unharmed. Some of these spring migrants are listed by the state or federal government as species under some degree of conservation risk, including coho salmon, which are federally Threatened in Oregon under the Endangered Species Act. Cormorant hazing is expected to benefit both wild-spawned and hatchery fish.
ODFW is also actively researching the potential use of low-power handheld lasers to disperse cormorants from feeding and roosting sites. Laser-based hazing activities will occur this spring on a trial basis at several coastal locations.