scholarly journals Population genetics of Bull Trout ( Salvelinus confluentus ) in the upper Athabasca River basin

2021 ◽  
Author(s):  
Emma K. T. Carroll ◽  
Steven M. Vamosi
Keyword(s):  
Population Genetics ◽  
River Basin ◽  
Bull Trout ◽  
Salvelinus Confluentus ◽  
Athabasca River

scholarly journals Population genetics of Bull Trout (Salvelinus confluentus) in the Upper Athabasca river basin

2019 ◽  
Author(s):  
Emma K. T. Carroll ◽  
Steven M. Vamosi
Keyword(s):  
River Basin ◽  
Habitat Degradation ◽  
Isolation By Distance ◽  
Land Use Changes ◽  
River Basins ◽  
Bull Trout ◽  
Eastern Slope ◽  
Salvelinus Confluentus ◽  
Athabasca River ◽  
Population Genetic Variation

AbstractAcross its native range, Bull Trout (Salvelinus confluentus) extent and abundance are in decline due to historic overharvest and habitat degradation. Because Bull Trout are dependent on extensively connected, cold, clean headwater habitats, fragmentation from land use changes causes difficulty when determining the true extent and health of their populations, with Bull Trout of Alberta’s Eastern Slope region being no exception. Across this region, 431 Bull Trout from 20 sites were sampled from the Athabasca and Saskatchewan River basins and compared using 10 microsatellite loci to characterize within- and among-population genetic variation. The Saskatchewan and Athabasca River basins contained similar levels of heterozygosity but were differentiated from one another. Within the Athabasca River basin, five genetically differentiated clusters were found. Additionally, no isolation-by-distance pattern was observed between these sites. These results suggest these populations have ample genetic diversity, but genetic differentiation should be considered when deciding whether and how to alter connectivity between populations.

scholarly journals Structured decision making for conservation of bull trout (Salvelinus confluentus) in Long Creek, Klamath River Basin, south-central Oregon

2017 ◽  
Author(s):  
Joseph R. Benjamin ◽  
Kevin McDonnell ◽  
Jason B. Dunham ◽  
William R. Brignon ◽  
James Peterson
Keyword(s):  
Decision Making ◽  
River Basin ◽  
Bull Trout ◽  
Salvelinus Confluentus ◽  
Structured Decision Making ◽  
Klamath River ◽  
South Central ◽  
Klamath River Basin

Bull trout (Salvelinus confluentus) occurrence and abundance influenced by cumulative industrial developments in a Canadian boreal forest watershed

2005 ◽  
Vol 62 (11) ◽  
pp. 2431-2442 ◽  
Author(s):  
Travis Ripley ◽  
Garry Scrimgeour ◽  
Mark S Boyce
Keyword(s):  
Logistic Regression ◽  
River Basin ◽  
Regression Models ◽  
Forest Harvesting ◽  
Bull Trout ◽  
Road Density ◽  
Salvelinus Confluentus ◽  
Logistic Regression Models ◽  
Canadian Boreal Forest ◽  
Local Extirpation

We examined relations between cumulative levels of forest harvesting and density of road networks on the occurrence and abundance of bull trout (Salvelinus confluentus) in the Kakwa River Basin, Alberta. Logistic regression models showed that bull trout occurrence was positively related to stream wetted width but negatively related to percent fines, percent cobbles, reach slope, and the cumulative area of the subbasin harvested and road density. Results from zero-inflated Poisson regression models typically showed that bull trout abundance was positively related to elevation and negatively related to stream width, percent fines, percent cobble, slope, and levels of forest harvesting. Using the negative relation between bull trout occurrence and percentage of subbasins harvested derived from the most parsimonious logistic regression model, we forecasted that forest harvesting over the next 20 years is projected to result in the local extirpation of bull trout from 24% to 43% of stream reaches that currently support bull trout in the Kakwa River Basin.

scholarly journals Application of the Least-Squares Wavelet software in hydrology: Athabasca River Basin

2021 ◽  
Vol 36 ◽  
pp. 100847
Author(s):  
Ebrahim Ghaderpour ◽  
Tijana Vujadinovic ◽  
Quazi K. Hassan
Keyword(s):  
Least Squares ◽  
River Basin ◽  
Athabasca River

Genetic clustering methods reveal bull trout (Salvelinus confluentus) fine-scale population structure as a spatially nested hierarchy

2009 ◽  
Vol 11 (4) ◽  
pp. 1421-1433 ◽  
Author(s):  
Will G. Warnock ◽  
Joseph B. Rasmussen ◽  
Eric B. Taylor
Keyword(s):  
Population Structure ◽  
Bull Trout ◽  
Fine Scale ◽  
Clustering Methods ◽  
Salvelinus Confluentus ◽  
Scale Population ◽  
Nested Hierarchy ◽  
Genetic Clustering

Uncertainty in modelling the hydrologic responses of a large watershed: a case study of the Athabasca River basin, Canada

2014 ◽  
Vol 28 (14) ◽  
pp. 4272-4293 ◽  
Author(s):  
Hyung-Il Eum ◽  
Dibike Yonas ◽  
Terry Prowse
Keyword(s):  
River Basin ◽  
Athabasca River ◽  
Hydrologic Responses

Geographic distribution, species displacement, and niche overlap for lake trout and bull trout in mountain lakes

1993 ◽  
Vol 71 (2) ◽  
pp. 238-247 ◽  
Author(s):  
David B. Donald ◽  
David J. Alger
Keyword(s):  
Trophic Structure ◽  
Lake Trout ◽  
Niche Overlap ◽  
Mountain Lakes ◽  
Bull Trout ◽  
Salvelinus Confluentus ◽  
East Central ◽  
Allopatric Populations ◽  
Trout Population ◽  
The One

Indigenous lacustrine populations of bull trout (Salvelinus confluentus) and lake trout (S. namaycush) are spatially separated within the southern part of the zone of distributional overlap (northern Montana, southwestern Alberta, and east-central British Columbia). In this area, lake trout occurred primarily in mountain lakes of 1032–1500 m elevation, while bull trout were found primarily in lakes between 1500 and 2200 m. Introductions of lake trout in the twentieth century and data obtained from beyond the study area indicated that both fishes can establish significant allopatric populations (more than 5% of the catch) in large, deep lakes (>8 ha in area and >8 m deep) over a wide elevation range. We tested the hypothesis that lake trout displace or exclude bull trout from lakes by determining the outcome of introductions of lake trout into two lakes that supported indigenous bull trout. Lake trout were introduced into Bow Lake in 1964, and by 1992 the bull trout population was decimated there and in another lake (Hector) situated 15 km downstream. Thus, lake trout can displace bull trout and may prevent bull trout from becoming established in certain low-elevation lakes. Population age-structure analyses also suggest that lake trout adversely affected bull trout. Bull trout populations in sympatry with lake trout, including the one extirpated from Hector Lake, had few old fish (18% were more than 5 years old; N = 40 fish from three lakes) compared with allopatric populations (49% were more than 5 years old; N = 235 fish from seven lakes). Niche overlap and the potential for competition between the two char species were substantial. In lakes with trophic structure ranging from simple to complex, bull trout and lake trout fed on similar foods and had similar ecological efficiencies (growth rates). Predation by lake trout on bull trout was not documented during the study.

Reach-scale movements of bull trout (Salvelinus confluentus) relative to hydropeaking operations in the Columbia River, Canada

Ecohydrology ◽  
2013 ◽  
pp. n/a-n/a ◽  
Author(s):  
Mark K. Taylor ◽  
Caleb T. Hasler ◽  
Scott G. Hinch ◽  
Bronwen Lewis ◽  
Dana C. Schmidt ◽  
...  
Keyword(s):  
Columbia River ◽  
Bull Trout ◽  
Salvelinus Confluentus
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