River features associated with chinook salmon spawning habitat in Southwest Alaska

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Show simple item record Jallen, Deena M. 2019-08-27T17:33:54Z 2019-08-27T17:33:54Z 2009-08
dc.description Thesis (M.S.) University of Alaska Fairbanks, 2009 en_US
dc.description.abstract Chinook salmon (Oncorhynchus tshawytscha) is a highly valued traditional, subsistence, and commercial resource in Southwest Alaska. Stream habitat availability is a major component influencing salmon productivity. The objective of this study is to identify river features associated with spawning habitat, and describe upper and lower boundaries of chinook salmon spawning on the Tuluksak River. River distances, elevation, salmon locations, spawning sites, and habitat observations were collected along 75 river kilometers of the Tuluksak River primarily within the Yukon Delta National Wildlife Refuge. Habitat and salmon observations were grouped into strata along the length of the river for comparison and analysis. Chinook salmon were observed spawning in the upper 45 river kilometers of the study area. Map-based observations of elevation and channel sinuosity correlate better with chinook salmon spawning than in stream habitat measurements along the Tuluksak River. The upper boundary of chinook salmon spawning in the Tuluksak River was outside of our study area. The lower boundary for chinook salmon spawning habitat on similar rivers might be determined by examining elevation, sinuosity, and channel features from remote images or maps prior to conducting field studies. en_US
dc.description.sponsorship Financial and logistic support for my thesis research was provided by the U.S. Fish and Wildlife Service (USFWS), including the Kenai Fish and Wildlife Field Office (KFWFO) and the Yukon Delta National Wildlife Refuge (YDNWR). Additional support and funding was provided by the Alaska Cooperative Fish and Wildlife Research Unit (AKCFWRU) and the University of Alaska Fairbanks. en_US
dc.language.iso en_US en_US
dc.subject Chinook salmon en_US
dc.subject Habitat en_US
dc.subject Spawning en_US
dc.subject Alaska, Southwest en_US
dc.title River features associated with chinook salmon spawning habitat in Southwest Alaska en_US
dc.type Thesis en_US ms en_US
dc.identifier.department Division of FIsheries en_US
dc.contributor.chair Margraf, F. Joseph
dc.contributor.committee Adkison, Milo

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