References in periodicals archive ?
The research, which involves marking chinook salmon by punching small holes in their gill covers - as well as inserting radio transmitters in a few fish - is being conducted to meet Oregon's obligation under the U.
Knotless nets - a legal requirement - should be used at all times and salmon should never be dragged over gravel and rocks, or held by the tail or gill covers.
Give that fish even a second to reach a crack or crevice and he'll park his backside, flare his gill covers against the walls and he's not coming out.