Higher than normal temperatures in the lower Columbia River this summer
has delayed the fall steelhead runs into Idaho.
Such a delay of this type often results in an overall lower return of
fish, say Idaho Fish and Game biologists.
Temperatures in the river were measured at about 70 degrees in September
at a time when Idaho steelhead are just beginning their migration upstream.
Normal temperatures would have been in the low or mid 60s.
The higher temperatures slow steelhead as …