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Title: Enhanced incubation success for kokanee spawning in groundwater upwelling sites in a small Idaho stream
Author: Garrett, James W.; Bennett, David H.; Frost, Frank O.; Thurow, Russell F.;
Source: North American Journal of Fish Management. 18: 925-930.
Publication Series: Scientific Journal (JRNL)
Description: Kokanee (Oncorhynchus nerka lacustrine sockeye salmon) spawned in groundwater upwelling in the North Fork of the Payette River, Idaho. Intragravel water temperatures in groundwater-influenced redds exceeded surface flow water temperature by 2.4–2.6°C. In redds without groundwater influence, intragravel and water column temperatures did not differ by more than 0.2°C. Although redds constructed in upwelling sites contained significantly more fine sediments (<0.83 mm) and were constructed in areas of significantly lower surface water velocities than redds not influenced by upwelling, preemergent survival of fry from redds in upwelling sites (84%) significantly exceeded that from redds in other areas (66%). Higher incubation temperatures at upwelling sites accelerated rates of development, protected embryos from freezing, and may increase survival of fry recruiting to Payette Lake.
Keywords: kokanee, Oncorhynchus nerka, sockeye salmon, spawning, groundwater upwelling, redds
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Garrett, James W.; Bennett, David H.; Frost, Frank O.; Thurow, Russell F. 1998. Enhanced incubation success for kokanee spawning in groundwater upwelling sites in a small Idaho stream. North American Journal of Fish Management. 18: 925-930.
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