The Columbia River will close to sturgeon fishing upstream of Bonneville Dam until further notice under temporary rules adopted by the states of Oregon and Washington.  The closure takes effect tomorrow and applies from Bonneville Dam to the Oregon/Washington border upstream of McNary Dam, including adjacent tributaries.   All sturgeon angling, including catch-and-release, and retention is prohibited until further notice in this portion of the river.  Fishery managers approved the closure after reviewing survey reports that showed increased sturgeon mortality as a result of the drought conditions in some of the mid-Columbia River reservoirs.  Normal fishing hours remain in effect for the mainstem Columbia and Snake rivers.  Fish biologists are appealing to anglers to adopt additional voluntary measures that will help reduce stress on the region’s fish.  Suggestions include fishing early in the day, moving to higher elevation lakes and ponds, shifting their focus from trout to warmwater species, using barbless hooks, and notifying authorities if they see mortalities or fish trapped in pools.