scholarly journals Hybridization between Yellowstone Cutthroat Trout and Rainbow Trout Alters the Expression of Muscle Growth-Related Genes and Their Relationships with Growth Patterns

PLoS ONE ◽  
2015 ◽  
Vol 10 (10) ◽  
pp. e0141373 ◽  
Author(s):  
Carl O. Ostberg ◽  
Dorothy M. Chase ◽  
Lorenz Hauser
Keyword(s):  
Rainbow Trout ◽  
Muscle Growth ◽  
Cutthroat Trout ◽  
Growth Patterns ◽  
Yellowstone Cutthroat Trout

Greater predation by Double-crested Cormorants on cutthroat versus rainbow trout fingerlings stocked in a Wyoming river

1999 ◽  
Vol 77 (12) ◽  
pp. 1984-1990 ◽  
Author(s):  
James R Lovvorn ◽  
Daniel Yule ◽  
Clayton E Derby
Keyword(s):  
Rainbow Trout ◽  
Cutthroat Trout ◽  
Phalacrocorax Auritus ◽  
Limited Data ◽  
Platte River ◽  
The North ◽  
Rainbow Trout Oncorhynchus Mykiss ◽  
Oncorhynchus Clarki Bouvieri ◽  
Pelecanus Erythrorhynchos ◽  
Yellowstone Cutthroat Trout

We studied the relative vulnerability of Yellowstone cutthroat trout (Oncorhynchus clarki bouvieri) versus rainbow trout (Oncorhynchus mykiss) stocked as fingerlings in the North Platte River, Wyoming, to Double-crested Cormorant (Phalacrocorax auritus) predation. Cutthroat fingerlings decreased as a fraction of the population from stocking in late June to electrofishing surveys in the following October and March. In contrast, the fraction of cutthroat fingerlings among tagged fingerlings eaten by cormorants collected on the river was significantly greater than that in the population when originally stocked. More limited data from pellets regurgitated by adult cormorants at a nearby colony and in American White Pelicans (Pelecanus erythrorhynchos) collected on the river showed the same trend toward greater percentages of cutthroat trout being consumed than were present among trout stocked. There were no differences in cormorant predation rates on the Eagle Lake strain of rainbow trout reared under shaded versus partially shaded conditions, or between Auburn and Bar BC strains of Snake River (Yellowstone) cutthroat trout. On the North Platte River, cutthroat trout fingerlings were more susceptible to cormorant predation than rainbow trout of similar size that were stocked simultaneously.

Trends in the Distribution and Abundance of Yellowstone Cutthroat Trout and Nonnative Trout in Idaho

2014 ◽  
Vol 5 (2) ◽  
pp. 227-242 ◽  
Author(s):  
Kevin A. Meyer ◽  
Erin I. Larson ◽  
Christopher L. Sullivan ◽  
Brett High
Keyword(s):  
Rainbow Trout ◽  
River Basin ◽  
Brown Trout ◽  
Brook Trout ◽  
Salmo Trutta ◽  
Cutthroat Trout ◽  
Snake River ◽  
Trout Population ◽  
Yellowstone Cutthroat Trout ◽  
Over Time

Abstract The distribution and abundance of Yellowstone cutthroat trout Oncorhynchus clarkii bouvieri across their native range is relatively well-known, but evaluations of trends in distribution and abundance over time are lacking. In 2010–2011, we resurveyed 74 stream reaches in the upper Snake River basin of Idaho that were sampled in the 1980s and again in 1999–2000 to evaluate changes in the distribution and abundance of Yellowstone cutthroat trout and nonnative trout over time. Yellowstone cutthroat trout occupied all 74 reaches in the 1980s, 70 reaches in 1999–2000, and 69 reaches in 2010–2011. In comparison, rainbow trout O. mykiss and rainbow × cutthroat hybrid occupancy increased from 23 reaches in the 1980s to 36 reaches in 1999–2000, and then declined back to 23 reaches in 2010–2011. The proportion of reaches occupied by brown trout Salmo trutta and brook trout Salvelinus fontinalis was largely unchanged across time periods. Yellowstone cutthroat trout abundance declined from a mean of 40.0 fish/100 linear meters of stream in the 1980s to 32.8 fish/100 m in 2010–2011. In contrast, estimates of abundance increased over time for all species of nonnative trout. Population growth rate (λ) was therefore below replacement for Yellowstone cutthroat trout (mean  =  0.98) and above replacement for rainbow trout (1.07), brown trout (1.08), and brook trout (1.04), but 90% confidence intervals overlapped unity for all species. However, λ differed statistically from 1.00 within some individual drainages for each species. More pronounced drought conditions in any given year resulted in lower Yellowstone cutthroat trout abundance 1 y later. Our results suggest that over a span of up to 32 y, the distribution and abundance of Yellowstone cutthroat trout in the upper Snake River basin of Idaho appears to be relatively stable, and nonnative trout do not currently appear to be expanding across the basin.

Propagated Fish in Resource Management

2004 ◽  
Keyword(s):  
Rainbow Trout ◽  
Largemouth Bass ◽  
Human Population ◽  
Micropterus Salmoides ◽  
Cutthroat Trout ◽  
Smallmouth Bass ◽  
Time Period ◽  
Rate Of Increase ◽  
Yellowstone Cutthroat Trout ◽  
The 1960S

<em>Abstract.</em>—This paper describes a database of fish stocking in Idaho dating from 1913. The database contains more than 75,000 complete records on stocking since 1967 and more than 50,000 partial records prior to that date. Information contained in the complete records includes watershed and water body, species and variety, size, stocking method, number per pound, pounds stocked, rearing hatchery, haul mortality, county, and management region. In order to compare numbers of salmonids stocked at differing life stages, we converted weight of stocked salmonids to a catch equivalent index (catch equivalent [CEQ] = weight of fish stocked/0.33). Our analysis of the data from the database indicated that since the 1960s, more than 2 million CEQ of rainbow trout <em>Oncorhynchus mykiss </em>have been stocked annually in Idaho. These comprise 23 different stocks, including Kamloops rainbow trout, redband trout, and 16 varieties of domestic rainbow trout. Since 1970, the number of rainbow trout stocked in Yellowstone cutthroat trout <em>O. clarkii </em>range has decreased by more than one-third. Triploid rainbow trout stocking commenced in 2000 and now exceeds 2 million CEQ annually. Largemouth bass <em>Micropterus salmoides </em>and smallmouth bass <em>M. dolomieu </em>stocking comprises nearly 1,814.4 kg per year. Crappie species are stocked at the rate of 590 kg annually. The rate of increase in stocking by the Idaho Department of Fish and Game has been about 300% in each of the last three decades, largely due to the construction of four large anadromous mitigation hatcheries. The human population in Idaho grew 22% per decade during that same time period, suggesting increasing reliance on stocked fish.

Morphological and swimming stamina differences between Yellowstone cutthroat trout (Oncorhynchus clarkii bouvieri), rainbow trout (Oncorhynchus mykiss), and their hybrids

2007 ◽  
Vol 64 (1) ◽  
pp. 127-135 ◽  
Author(s):  
Steven M Seiler ◽  
Ernest R Keeley
Keyword(s):  
Rainbow Trout ◽  
Oncorhynchus Mykiss ◽  
Body Shape ◽  
Cutthroat Trout ◽  
Swimming Velocity ◽  
Swimming Ability ◽  
Geometric Morphometric ◽  
Oncorhynchus Clarkii ◽  
Rainbow Trout Oncorhynchus Mykiss ◽  
Yellowstone Cutthroat Trout

We hypothesized that body shape differences between Yellowstone cutthroat trout (Oncorhynchus clarkii bouvieri), rainbow trout (Oncorhynchus mykiss), and their hybrids may influence swimming ability and thus play an important role in the invasion of nonnative rainbow trout and hybrid trout into native cutthroat trout populations. We reared Yellowstone cutthroat trout, rainbow trout, and reciprocal hybrid crosses in a common environment and conducted sustained swimming trials in order to test for genetically based morphological and swimming stamina differences. Linear and geometric morphometric analyses identified differences in body shape, with cutthroat trout having slender bodies and small caudal peduncles and rainbow trout having deep bodies and long caudal peduncles. Hybrid crosses were morphologically intermediate to the parental genotypes, with a considerable maternal effect. Consistent with morphological differences, cutthroat trout had the lowest sustained swimming velocity and rainbow trout had the highest sustained swimming velocity. Sustained swimming ability of hybrid genotypes was not different from that of rainbow trout. Our results suggest that introduced rainbow trout and cutthroat-rainbow trout hybrids potentially out-compete native Yellowstone cutthroat trout through higher sustained swimming ability.

Purifying a Yellowstone Cutthroat Trout Stream by Removing Rainbow Trout and Hybrids via Electrofishing

2017 ◽  
Vol 146 (6) ◽  
pp. 1193-1203 ◽  
Author(s):  
Kevin A. Meyer ◽  
Patrick Kennedy ◽  
Brett High ◽  
Matthew R. Campbell
Keyword(s):  
Rainbow Trout ◽  
Cutthroat Trout ◽  
Yellowstone Cutthroat Trout

Abiotic conditions are unlikely to mediate hybridization between invasive rainbow trout and native Yellowstone cutthroat trout in a high-elevation metapopulation

2020 ◽  
Vol 77 (9) ◽  
pp. 1433-1445 ◽  
Author(s):  
Kurt C. Heim ◽  
Thomas E. McMahon ◽  
Steven T. Kalinowski ◽  
Brian D. Ertel ◽  
Todd M. Koel
Keyword(s):  
Rainbow Trout ◽  
Cutthroat Trout ◽  
High Elevation ◽  
Source Population ◽  
Full Spectrum ◽  
Oncorhynchus Clarkii ◽  
Abiotic Conditions ◽  
Management Intervention ◽  
Rainbow Trout Oncorhynchus Mykiss ◽  
Yellowstone Cutthroat Trout

Understanding factors mediating hybridization between native and invasive species is crucial for conservation. We assessed the spatial distribution of hybridization between invasive rainbow trout (Oncorhynchus mykiss) and native Yellowstone cutthroat trout (Oncorhynchus clarkii bouveri) in the Lamar River of Yellowstone National Park using a paired telemetry and genetic dataset. Spawning populations containing hybrids (15/30) occupied the full spectrum of abiotic conditions in the watershed (stream temperature, stream size, runoff timing), including an intermittent stream that dried completely in late June, and mainstem spawning locations. Hybrids and rainbow trout occupied an entire high-elevation (∼2500–1900 m) tributary where rainbow trout ancestry was highest in headwaters and decreased downstream. Fluvial distance to this ostensible source population was the only covariate included in top hybridization models; effects of abiotic covariates and stocking intensity were relatively weak. In this watershed, abiotic conditions are unlikely to mediate continued hybridization. We conclude that management intervention is important for the persistence of nonhybridized Yellowstone cutthroat trout and highlight the value of pairing telemetry with genetic analysis to identify and characterize populations for hybridization assessments.

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