Spatial Variability of Chinook Salmon Spawning Distribution and Habitat Preferences
作者： Jeremy M. Cram , Christian E. Torgersen , Ryan S. Klett , George R. Pess , Darran May
DOI: 10.1080/00028487.2016.1254112
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摘要: AbstractWe investigated physical habitat conditions associated with the spawning sites of Chinook Salmon Oncorhynchus tshawytscha and interannual consistency distribution across multiple spatial scales using a combination spatially continuous discrete sampling methods. We conducted census aquatic in 76 km upper main-stem Yakima River Washington evaluated site redd survey data from 2004 to 2008. Interannual reoccupation areas was high, ranging an average Pearson’s correlation 0.62 0.98 channel subunits 10-km reaches, respectively. Annual variance highest units subunits, but it low at reach scales. In 13 15 models developed for individual years (2004–2008) lengths (800 m, 3 km, 6 km), stream power depth were primary predictors abundance. Multiple channels overhead cover patchy ...
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