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Depoe Bay volunteers report parasite outbreak in hatchery fish, discuss treatments and egg allocation
Summary
At the Sept. 29 Depoe Bay management meeting volunteers described a single-celled parasite that sickened juvenile hatchery fish, estimated several thousand mortalities, and discussed treatment limits, net-pen capacity and the process to request more eggs from state hatchery managers.
Volunteers at the Sept. 29 Depoe Bay meeting reported that a single-celled parasite affected juvenile hatchery fish in a floating net pen and estimated several thousand fish died.
Meeting members said pathologists advised two possible approaches were available: a chemical treatment that requires placing fish in a closed container, and salinity treatment when fish migrate to saltwater. The group said pathologists recommended allowing fish to progress to the ocean so salinity would eliminate the parasite rather than trying the chemical option on open floating pens.
The issue matters because the group receives a set allocation of fish eggs from the Trask River Hatchery as defined in that hatchery’s…
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