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Bringing back the
LAHONTAN CUTTHROAT TROUT
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| Photo by Pete Rissler |
Restoring habitat for fish and people
by
Jason Dunham
"This article first appeared in 'Trout' magazine (Spring 1998), published by Trout Unlimited. For more information about Trout Unlimited, see http://www.tu.org."
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Those who know Lahontan cutthroat trout often think of big fish in unlikely places.
During the latter part of the 1800s and early 1900s, Lahontan cutthroat trout was
commercially fished by the ton in the desert lakes of Nevada. Individual fish grew to 20-
60 pounds in Pyramid and Walker Lakes, and in Lake Tahoe. But, by the early 1940s
these fish had largely disappeared. Today, Pyramid and Walker Lakes harbor popular
sport fisheries, but the big fish of yesteryear remain only as memories.
Declines of Lahontan cutthroat trout in these lakes resulted from a host of problems,
including overfishing, dams and water diversions, habitat loss, and effects of non-native
fishes, including rainbow, brook, brown, and lake trout. Today, Lahontan cutthroat trout
is listed as a threatened species by the U.S. Fish and Wildlife Service (USFWS). They
now occupy less than 3% of their former habitat in the Walker, Carson and Truckee River
basins of northeastern California and western Nevada.
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| Catches of Lahontan Cutthroat Trout in Walker and
Pyramid Lakes prior to 1940. |
Continued progress toward improved hatchery management and habitat restoration
should improve the Pyramid Lake and lower Truckee River fisheries, but it is unclear
whether a trophy fishery of historical proportions will be realized again. Restoration of
cutthroat trout populations in other area lakes and streams in the area may prove even
more challenging. For example, large populations of non-native trout in Lake Tahoe may
pose a hazard to reintroduced Lahontan cutthroat trout, and declining water levels in
Walker Lake threaten to completely destroy its hatchery-supported fishery by the end of
this century.
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| ROAD TO RECOVERY
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Perhaps the greatest opportunity to bring back Lahontan cutthroat trout lies to the east,
where it once supported a remarkable fishery in the interior desert streams of northern
Nevada. The plight of cutthroat trout in these streams resulted from habitat destruction
through activities like road construction, mining, livestock grazing, and water diversions
for agricultural, mining and municipal purposes. In many cases, invasions of non-native
trout species, such as rainbow, brown, and brook trout may have harmed Lahontan
cutthroat trout. Lahontan cutthroat trout may hybridize with other subspecies of cutthroat
or rainbow trout, which compromises their genetic integrity. Currently, it is estimated
that Lahontan cutthroat trout occupy only a small fraction (14-15 percent) of historically
occupied stream habitats in Nevada's interior.
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Among the various government agencies, Native American tribes, and private interests
already involved with Lahontan cutthroat trout, there is a strong commitment to recovery.
Recovery, as defined by the USFWS, simply means that Lahontan cutthroat trout
populations are no longer at a significant risk of extinction, and may be removed from the
list of threatened species, but "recovery," according to the strict, technical definitions
under the Endangered Species Act, does not by itself guarantee that other components of
aquatic ecosystems are intact. Recovery also does not necessarily ensure that once-
prolific fisheries are restored.
The recovery of fisheries and ecosystems will only occur when the public realizes that
the disappearance of Lahontan cutthroat trout is more than just a fish issue; rather, it
symbolizes a broader environmental threat that affects all desert life, including people.
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| Photo by Jason Dunham |
Photo by Robert Schroeter |
| Destruction of habitat in this stream may have caused one of the most recent local extinctions of Lahontan Cutthroat Trout. | A Lahontan Cutthroat Trout (left) squares off with a brook trout (right) in an experimental tank.
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| HOSTILE ENVIRONMENT
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"Environmental" and "threat" are two words that often go together in this land where
letters from the U.S. Forest Service or Bureau of Land Management (BLM) can be
received with the anxiety most feel when they receive notice of a tax audit from the
Internal Revenue Service. The federal government owns about 87% of the land in
Nevada, and people who depend on their privilege to use public lands for their own
benefit may be frustrated by land-use regulations.
This frustration has taken many forms. In 1994, Nye county commissioner Dick
Carver illegally bulldozed a closed road in the Toiyabe National Forest as part of a
nationally publicized attempt to gain local control of federal lands. In the past four years,
at least three bombings have been directed at federal land management offices in Reno.
More recently, Elko County has launched a grand jury investigation of federal land
management officials. Needless to say, Nevada is not a popular tour of duty for many
federal employees. Yet despite of this hostile climate, there are encouraging signs of
civility.
One of the first signs of civility on behalf of Lahontan cutthroat trout came in 1988,
when an unlikely assembly of ranchers, environmentalists, and federal and state officials
formed the Trout Creek Working Group. The group has involved a host of participants,
including representatives of the Izaak Walton league, Oregon Trout, the Oregon
Cattleman's Association, local ranchers, the Oregon Department of Fish and Wildlife, the
BLM, and the USFWS. The group formed in response to the need to better manage
habitats supporting Lahontan cutthroat trout populations in streams of the Trout Creek
Mountains, which straddle the remote desert lands of the Oregon-Nevada border.
In the past decade, the Trout Creek cooperative efforts have reduced livestock use
along streams by nearly 80 percent, with the most visible result has been the dramatic
recovery of riparian plants and trees. Instream habitat characteristics, such as pool
frequency, have been slower to respond, but Lahontan cutthroat trout numbers appear to
be increasing with a total population of roughly 22,000 fish aged one year or older in
1994.
Fluctuations in those trout populations are undoubtedly due in part to natural climatic
cycles, such as the drought of the late 1980s and early 1990s. However, abundant
regeneration of stream bank vegetation signals the beginning a natural, long-term
recovery process. Research in other parts of the arid West indicates that stream habitat
responses to grazing management (e.g. fencing and livestock exclosures) may take
several decades.
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| A FLAGSHIP PROJECT
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A watershed restoration project on the Marys River, which supports one of Nevada's
largest remaining native populations of Lahontan cutthroat trout, has become a flagship
example of cooperation in native fish restoration. Matt Holford, Trout Unlimited Nevada
State Council Chairman and Elko resident, described the series of events that initiated the
Marys River restoration project.
"In 1988, the BLM, Nevada Division of Wildlife, USFWS, U. S. Forest Service, local
ranchers, and sportsmen embarked on a cooperative trout habitat restoration project for
the Mary's River. A $45,000 dollar donation was given by Barrick Goldstrike Mines Inc.,
and matched with Sport Fish Restoration funds to make the initial $180,000 investment.
Land swaps and conservation easements with local ranchers have brought recreation
access to most of the 128 stream miles of the Mary's River."
In 1992, the Bring Back the Natives program was launched by the National Fish and
Wildlife Foundation, the BLM, the Forest Service, and Trout Unlimited's national office.
Bring Back the Natives restores native fish on public lands. Over the past five years, the
program has injected considerable sums of private and public dollars into the Marys
River project.
"TU's Northeastern Nevada Chapter (NNTU) became involved in this project from the
chapter's inception in 1990, and has since raised tens of thousands of dollars for habitat
projects, fencing monitoring, and scientific studies," said Holford.
"Funding raised by NNTU includes three grants through TU's national Embrace-A-Stream
program and six Bring Back the Natives grants." In 1997 alone, NNTU matched a
$10,000 Embrace-A-Stream grant with an equal amount in cash and in-kind
contributions.
Much progress has been made, but critical gaps remain in terms of areas needing
protection. There are culverts, water diversions, and unmitigated grazing damage in
many parts of the basin.
Non-native brook trout in tributaries of the lower Marys River pose another potential threat
to Lahontan cutthroat trout. If brook trout are able to invade other parts of the basin, they
may displace Lahontan cutthroat trout and threaten the success of habitat restoration. In 1997, a
single brook trout was captured in the upper Marys River, but it is uncertain whether this
fish originated from populations downstream, or from an illegal fish introduction.
While a formally chartered working group has not yet been established on the Marys
River cooperation between local ranchers, such as the Wright and Gibbs families, and
state and federal agencies, has been key to improved protection and recovery of damaged
and sensitive habitats. Increasingly, ranchers are coming to appreciate their role in
habitat recovery.
In a recent interview published in the Great Basin News, Bill Wright explained why
his family supports restoration and responsible land management:
"I grew up on horseback. The otters were there, the fish, the coyotes, the sandhill
cranes. It's pretty. We like it that way." In the same article, Preston Wright said, "Too
many people view home rule as a way to do things the way we've always done them.
Ranchers have to admit they're part of the problem. We get along with the BLM. But I
think I might be able to influence my peers more than some agency can."
Said Oregon ranchers Doc and Connie Hatfield of the Trout Creek Working Group:
"Success on the land comes when a diverse group of interested [members of the] `public'
acknowledge one another as human beings and develop a vision for what a healthy land
and community needs to be. The main obstacle is overcoming the frontier mentality
we've fostered in the West for the past century - that the land is a source of unlimited
products to be used for people's immediate benefit."
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| THIS LAND IS OUR LAND
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| Photo by Elko District BLM |
Photo by Jason Dunham |
Photo by Elko District BLM |
| Marys River prior to restoration: 1979. |
1994 |
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Ultimately, habitat recovery projects like those on the Marys River and Trout Creeks, will
require a long term commitment. That commitment entails, in part, continuing financial
support. While cooperation from both government and private parties will continue to be
vital, the question of financial responsibility is contentious, particularly when public
lands grazing and tax dollars are the issue.
Increasingly, the price of doing business on public lands is affected by rapidly growing
demands for cleaner and healthier streams, and more recreational opportunities, such as
high quality angling for native trout. Said William Marlett of the Oregon Natural Desert
Association "We fail to appreciate the size and cost of the success relative to the size of
the problem...this is not to sound cynical, just being realistic. In most cases,
conservationists, taxpayers and the fish would be better off if we could just buy out the
grazing permit from the rancher and get rid of the problem once and for all." That
prospect is a lightning rod for many ranchers who view a federal permit as a property
right rather than a government subsidy.
Others have completely different ideas. Said one federal land manager, who wished to
remain anonymous: "The long-term plan is to `wean' ranchers (and other land users) from
this dependence on government supervision. ranchers may ultimately be required to do
their own utilization surveys, monitoring, etc., and be accountable, [recognizing that]
there are consequences for non-compliance." The land manager continued,
"Improvement of streams can improve water supply and forage for cows, thus benefiting
ranchers and fish." If not motivated by fish alone, ranchers should be elated about the
prospect for decreased government supervision and increased water supply and forage.
This self-monitoring approach is not likely to thrill some conservationists, however.
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| PROSPECTS FOR BIG, NATIVE FISH
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Large-scale habitat restoration underway in the Trout Creeks and Marys River is a radical
departure from more conventional approaches. In the past, trout habitat restoration in
trout streams often relied on the strategic placement of rocks, logs, or rock weirs to create
pools, undercut banks, and other forms of habitat. Habitat structures may produce rapid
results, but they are only short-term solutions if land management at the watershed level
is not properly implemented.
Watershed management involves complex coordination between many individuals and
agencies covering large tracts of land. Unlike habitat structures, which can be installed in
a period of a few days, the response of streams to changes in land management practices
can take decades. In the long term, however, that approach may be the best investment
for Lahontan cutthroat recovery.
Explained Pat Coffin, senior author of the USFWS's Recovery Plan for Lahontan
cutthroat trout: "Recovery of Lahontan cutthroat trout is dependent upon the
reestablishment of a metapopulation structure where the trout has an opportunity to
complete the full array life requirements including migration between streams."
Historically, most populations of Lahontan cutthroat trout were part of a larger
"metapopulation" or group of populations living in a network of interconnected stream
habitats. In such systems, localized losses in trout populations can be balanced by
immigration of fish from other habitats.
Today, most Lahontan cutthroat trout occupy small and isolated habitats that may be
particularly vulnerable to the effects of disturbances like floods, fires, droughts. There is
little or no chance that isolated habitats will be naturally re-populated by immigration.
In larger, interconnected systems, such as the Marys River, trout may rapidly re-populate
following local extinctions.
Not only are Lahontan cutthroat trout populations more stable in larger systems
managed with a watershed approach, but the opportunity to migrate from smaller to larger
habitats can provide for bigger fish.
From an angler's perspective, the potential for trout to adopt migratory lifestyles can
provide excellent fishing opportunities. Historically, anglers in the Marys River and
other streams in Nevada targeted large, migratory Lahontan cutthroat trout. Today, few
migratory fish are available, but habitat restoration in the Marys River may revive this
fishery. This vision is behind Matt Holford's efforts to restore, Lahontan cutthroat trout:
"I want my children to have the opportunity to catch big native trout here - in Nevada."
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| Photo by Peter Rissler |
| Migratory Lahontan Cutthroat Trout |
| A NEW LEGACY
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Lahontan cutthroat trout are just one of many reasons to reconsider how stream habitats are
valued and used in Nevada. For example, Nevada is home to at least four other native
trouts, all of special concern, including Bonneville and Yellowstone cutthroat trout,
redband rainbow trout, and bull trout (considered to be a charr by biologists). Streams
draining from Nevada into the Snake River, such as the Bruneau, Owyhee, Jarbidge, and
Salmon Falls Rivers supported prolific runs of chinook salmon before they were
ultimately destroyed by construction of downstream dams.
Looking back on history, it is difficult to imagine how productive these streams once
were, providing abundant fish, wildlife, and clean water. Yet, the dramatic
environmental changes that have occurred following the arrival of white immigrants 150
years ago span only a brief moment in the region's history, including a native human
history dating back thousands of years. While many lessons remain to be learned, habitat
restoration projects in the Marys River and Trout Creek have shown an encouraging
potential to reverse this legacy, and return the land to a place where people and fish can
coexist.
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-Jason Dunham is a Postdoctoral Research Fellow with the University of Nevada
Biological Resources Research Center in Reno, Nevada. His current research is focused
on conservation biology of fishes, including cutthroat trout and bull trout.
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| HISTORICAL FISHERIES
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While the historical fisheries for large (20-60 pound) Lahontan cutthroat trout in Lake
Tahoe and Pyramid and Walker Lakes are legendary, it is less well-known that smaller
desert streams in Nevada once supported remarkable fisheries in their own right.
Lahontan cutthroat trout populations of the upper Humboldt River basin were prolific
when the first white emigrants traveled along the river in the 1840s. Journals of many of
the 1843-1870 emigrants speak of the fine trout caught in the Humboldt River and its
tributary streams. As an example, early descriptions of Pine Creek in Pine Valley
indicated it was a long grassy valley, with a clear silvery stream of water and was known
for its splendid trout. In June 1899, the Reese River Reville noted that an Austin boy had
caught the largest trout seen in that section of the river for a long time, weighing over 12
pounds, and measuring over 30 inches in length.
At the time the Elko area was settled by white emigrants the Humboldt River provided
excellent trout fishing. In July, 1869, the Elko Independent newspaper noted "Silver-
scaled, speckled trout, fresh from the limpid waters of the Humboldt, and weighing from
one to three pounds, are plenty in this market at four bits apiece. It is not unusual for
fishermen to capture trout weighing five and six pounds, and one has been recently
caught which weighed eight pounds." The last documented Lahontan cutthroat trout was
taken from the Humboldt River about 1937.
Many tributary streams still have populations of Lahontan cutthroat trout. Declines in
populations of larger native trout have been noted during recent decades. As an example,
during the 1970s, Marys River frequently provided cutthroat trout in the two to four
pound size range, and a fish caught by a fly fisher in 1972 measured 25´ inches in
length. Loss of these larger trout appears to be related to changes in stream habitat
conditions and loss of larger pool structure in Marys River.
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| -P. D. Coffin, U.S. Fish and Wildlife Service
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| NEVADA TU LEADS NATIVE FISH EFFORTS
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Founded in 1990, TU's Northeast Nevada Chapter (NNTU) is dedicated to saving native
fish in northeastern Nevada. The chapter has faced many challenges, including securing
fishing regulation changes to benefit native fish, appealing U. S. Forest Service road
construction projects on the Jarbidge River - home to the country's southernmost
populations of bull trout - and working with the Goshute Indian Tribe and TU's Utah
Council to restore Bonneville cutthroat trout. It's largest effort by far is the Lahontan
cutthroat trout recovery program on the Marys River.
Project work on the Marys River has been underway since 1990 and will continue well
into the early years of the 21st century. TU volunteers and local Elko County residents
have planted more than 6,000 trees on the Marys River and rebuilt 35 miles of fencing. At
its annual banquets during the last few years, NNTU challenged local mining companies
to become involved in the Marys River project: Barrick Goldstrike Mines, Inc. stepped up
to the plate and became one of the project's principal supporters. Last year Barrick
Goldstrike employees volunteered in rebuilding two miles of fencing. Barrick has also
led efforts to remove a multi-culvert system, which has prohibited Lahontan cutthroat
trout movement, on the newly-acquired Hawk's Ranch and replace it with a bridge.
Barrick engineers have completed bridge design and field surveys; the bridge is expected
to be in place by the fall of 1998.
In recent years, NNTU's membership has grown, and the popularity of Trout
Unlimited and fisheries conservation has caught on in Nevada. TU members are working
on a native fish strategy for the state of Nevada that will enhance the significant
recreational fisheries program already in place. Local TU members have started a new
state council and a chapter in Las Vegas-the Southern Nevada Chapter. A third chapter,
the Sagebrush Chapter, is based in Reno where TU's 1998 convention will take place in
August.
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| -Matt Holford, Nevada Council Chairman
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RELATED WEB RESOURCES
| RECENT PUBLICATIONS RELEVANT TO LAHONTAN CUTTHROAT TROUT IN
STREAMS OF THE INTERIOR LAHONTAN BASIN
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Coffin, P. D. and Cowan, W. F. 1995. Lahontan cutthroat trout (Oncorhynchus
clarki henshawi) recovery plan. U.S. Fish and Wildlife Service Region 1,
Portland, Oregon.
Dickerson, B. R. 1997. The effects of high temperature and high levels of
dissolved solids on the growth and survival of Lahontan cutthroat trout,
Oncorhynchus clarki henshawi. Master's thesis, University of Nevada, Reno.
Dunham, J. B., M. M. Peacock, B. E. Rieman, R. E. Schroeter, and G. L.
Vinyard. In review. Conservation implications of local and geographic
variability in the distribution of stream-living Lahontan cutthroat trout.
Submitted to Transactions of the American Fisheries Society.
Dunham, J. B., M. E. Rahn, R. E. Schroeter, and S. W. Breck. In revision.
Diets of syntopic Lahontan cutthroat trout and brook trout: implications for
species interactions. Accepted to Great Basin Naturalist 4/98.
Dunham, J. B. 1998. Bringing back the Lahontan cutthroat trout: restoring
habitat for fish and people. Trout 1998(Spring): 20-29.
Dunham, J. B., G. L. Vinyard and B. E. Rieman. 1997. Habitat fragmentation and
extinction risk of Lahontan cutthroat trout (Oncorhynchus clarki henshawi).
North American Journal of Fisheries Management 17:910-917.
Dunham, J. B. and G. L. Vinyard. 1997. Relationships between body size,
abundance and the self-thinning rule in stream-living salmonids. Canadian
Journal of Fisheries and Aquatic Sciences 54:1025-1030.
Dunham, J. B. and G. L. Vinyard. 1997. Incorporating stream level
variability into analyses of fish-habitat relationships: some cautionary
examples. Transactions of the
American Fisheries Society 126:323-329.
Dunham, J. B. and G.L. Vinyard. 1996. Dysfunctional characteristics of small
trout populations. Final report for USDA INT-92731-RJVA. 175pp.
Dunham, J. B. 1996. The population ecology of stream-living Lahontan
cutthroat trout
(Oncorhynchus clarki henshawi). Doctoral dissertation, University of
Nevada-Reno.
Gutzwiller, L. A., R. M. McNatt, and R. D. Price. 1997. Watershed
restoration and grazing practices in the Great Basin: Marys River, Nevada.
Chapter 21 in J.E. Williams, C.A. Wood and M.P. Dombeck, editors.
Watershed restoration: principles and practices. American Fisheries
Society, Bethesda, Maryland.
Jones, K. K., J. M. Dambacher, B. G. Lovatt, and A. G. Talabere. 1998.
Status of Lahontan cutthroat trout in the Coyote Lake basin, southeast
Oregon. North American Journal of Fisheries Management 18:000-000.
Myers, T. J. 1995 and S. Swanson. 1995. Impact of deferred rotation grazing
on stream
characteristics in central Nevada: a case study. North American Journal of
Fisheries Management 15:428-439.
Sevon, M., J. French, J. Curran, and R. Phenix. 1997. Lahontan cutthroat
trout fishery management plan for the Quinn River/Black Rock and North Fork
Little Humboldt River drainage basins. Nevada Division of Wildlife, Reno,
Nevada.
Vinyard, G. L. and A. Yuan. 1996. Effects of turbidity on feeding rates of
Lahontan
cutthroat trout (Oncorhynchus clarki henshawi) and Lahontan redside shiner
(Richardsonius egregius). Great Basin Naturalist.
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