scholarly journals Bull Trout Salvelinus confluentus

Fisheries ◽  
2021 ◽  
Vol 46 (2) ◽  
pp. 100-100
Author(s):  
Joel Sartore
Keyword(s):  
Bull Trout ◽  
Salvelinus Confluentus

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

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

The effects of long-term cadmium exposure on the growth and survival of juvenile bull trout (Salvelinus confluentus)

2002 ◽  
Vol 58 (3-4) ◽  
pp. 165-174 ◽  
Author(s):  
J.A Hansen ◽  
P.G Welsh ◽  
J Lipton ◽  
M.J Suedkamp
Keyword(s):  
Cadmium Exposure ◽  
Bull Trout ◽  
Salvelinus Confluentus ◽  
Growth And Survival

Bull Trout Salvelinus confluentus , Willamette National Forest

Fisheries ◽  
2018 ◽  
Vol 43 (9) ◽  
pp. 450-450
Keyword(s):  
National Forest ◽  
Bull Trout ◽  
Salvelinus Confluentus

Otolith microchemistry reveals partial migration and life history variation in a facultatively anadromous, iteroparous salmonid, bull trout (Salvelinus confluentus)

2019 ◽  
Vol 102 (1) ◽  
pp. 95-104 ◽  
Author(s):  
Catherine S. Austin ◽  
Morgan H. Bond ◽  
Joseph M. Smith ◽  
Erin D. Lowery ◽  
Thomas P. Quinn
Keyword(s):  
Life History ◽  
Otolith Microchemistry ◽  
Partial Migration ◽  
Bull Trout ◽  
Life History Variation ◽  
Salvelinus Confluentus

It’s complicated…Environmental DNA as a predictor of trout and char abundance in streams

2020 ◽  
Author(s):  
Adam J. Sepulveda ◽  
Robert Al-Chokhachy ◽  
Matthew B Laramie ◽  
Kyle Crapster ◽  
W Ladd Knotek ◽  
...  
Keyword(s):  
Cutthroat Trout ◽  
Environmental Dna ◽  
Fish Abundance ◽  
Bull Trout ◽  
Intermountain West ◽  
Salvelinus Confluentus ◽  
Oncorhynchus Clarkii ◽  
Habitat Monitoring ◽  
Abundance Estimates ◽  
Random Site

The potential to provide inferences about fish abundance from environmental (e)DNA samples has generated great interest. However, the accuracy of these abundance estimates is often low and variable across species and space. A plausible refinement is the use of common aquatic habitat monitoring data to account for attributes that influence eDNA dynamics. We therefore evaluated the relationships between eDNA concentration and abundance of bull trout (Salvelinus confluentus), westslope cutthroat trout (Oncorhynchus clarkii lewisi) and rainbow trout (O. mykiss) at 42 stream sites in the Intermountain West (USA and CAN) and tested if accounting for site-specific habitat attributes improved the accuracy of fish abundance estimates. eDNA concentrations were positively associated with fish abundance but these relationships varied by species and site and there was considerable variation unaccounted for. Random site-level differences explained much of this variation, but specific habitat attributes of those sites explained relatively small amounts of this variation. Our results underscore that either eDNA sampling or environmental characterization will require further refinement before eDNA can be used reliably to estimate fish abundance in streams.

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