Identification and characterization of inconnu spawning habitat in the Sulukna River, Alaska

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Show simple item record Gerken, Jonathon D. 2016-11-07T22:28:21Z 2016-11-07T22:28:21Z 2009-12
dc.description Thesis (M.S.) University of Alaska Fairbanks, 2009 en_US
dc.description.abstract Inconnu (Stenodus leucichthys) is present throughout much of the Yukon River drainage in Alaska, but only five spawning areas have been identified. Spawning habitat requirements are therefore thought to be very specific; however, the physical qualities of these habitats have only been characterized in general terms. The Sulukna River is one of five identified inconnu spawning areas within the Yukon River drainage. A systematic sampling design was used in September and October of 2007-2008 to define Sulukna River spawning locations. Presence of inconnu was identified using hook and line sampling methods and spawning was verified by catching broadcast eggs in plankton nets. Small-scale, large-scale, and chemical habitat variables were sampled at transects located every 1.8 river kilometer (rkm). Project results indicate that spawning habitat was confined to a narrow reach of approximately 20 rkm. Spawning habitat occurred significantly more often in transects characterized with substrate between 6 and 12 cm, a width to depth ratio between 15 - 36, and water conductivity between 266 - 298 microsiemens per centimeter. Similar studies on other known spawning habitats would reveal whether these qualities are common to all inconnu spawning populations or unique to the Sulukna River. en_US
dc.language.iso en_US en_US
dc.title Identification and characterization of inconnu spawning habitat in the Sulukna River, Alaska en_US
dc.type Thesis en_US ms en_US
dc.identifier.department Fisheries Division en_US
dc.contributor.chair Margraf, Joseph
dc.contributor.committee Zimmerman, Christian
dc.contributor.committee Verbyla, David
dc.contributor.committee Brown, Randy

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