Carbaryl, Carbofuran, and Methomyl - National Marine Fisheries ...

substantial (but uncertain) fraction of these appear to be of hatchery origin. This
condition leads to uncertainty regarding growth rate and productivity of the natural
component of the ESU. Genetic integrity may have been compromised due to the
artificial supplementation that has occurred in this population. Approximately one
million sockeye have been released into the Ozette watershed from the late 1930s to
present (Kemmerich 1945; Boomer 1995; Good, Waples et al. 2005).
Critical Habitat
On September 2, 2005, NMFS designated critical habitat for the Ozette Lake sockeye
salmon ESU (70 FR 52630), and encompasses areas within the Hoh/Quillayute subbasin.
Refer to the final rule for additional information on the watersheds within this subbasin,
including a map of the area. Limiting factors for this species include siltation of beachspawning
habitat and logging.
Snake River Sockeye Salmon
Distribution
The SR sockeye salmon ESU includes all anadromous and residual sockeye from the SR
basin Idaho, as well as artificially propagated sockeye salmon from the Redfish Lake
Captive Broodstock Program (Figure 23).
Life History
SR sockeye salmon are unique compared to other sockeye salmon populations. Sockeye
salmon returning to Redfish Lake in Idaho’s Stanley Basin travel a greater distance from
the sea (approximately 900 miles) to a higher elevation (6,500 ft) than any other sockeye
salmon population and are the southern-most population of sockeye salmon in the world
(Bjornn, Craddock et al. 1968). Stanley Basin sockeye salmon are separated by 700 or
more river miles from two other extant upper Columbia River populations in the
Wenatchee River and Okanogan River drainages. These latter populations return to lakes
at substantially lower elevations (Wenatchee at 1,870 ft, Okanagon at 912 ft) and occupy
different ecoregions.
138