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Observations of Deep‐Spawning Kokanee on Artificially Created Spawning Habitat
Author(s) -
Hassemer P. F.,
Rieman B. E.
Publication year - 1981
Publication title -
north american journal of fisheries management
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.587
H-Index - 72
eISSN - 1548-8675
pISSN - 0275-5947
DOI - 10.1577/1548-8659(1981)1<173:oodkoa>2.0.co;2
Subject(s) - habitat , fishery , biology , ecology
Concentrated kokanee (Oncorhynchus nerka) spawning activity was observed in water as deep as 20 m, with no obvious depth preference exhibited by fish near shoreline areas of Coeur d'Alene Lake, Idaho, altered by road construction. The substrate in these areas consisted of angular road‐fill material that was too large for fish to excavate during redd construction. Spawning appeared to be more broadcast in nature on the road‐fill substrate than the typical redd construction noted for Pacific salmon (genus Oncorhynchus). This information shows that successful kokanee spawning can occur well below the zone of water‐level fluctuation in lakes with outlet control structures, and that artificial spawning habitat for shoreline‐spawning stocks of kokanee can be created.