Brood Stock
Hatcheries Send Ripples Across Nation's Waters
by Craig
Springer, U.S. Fish & Wildlife Service |
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Early morning sunlight streaks over the brushy high-plains of southern
Wyoming. Gray-green scrub is bent by incessant wind. And as Pat Malone
drives to work every morning he's probably no different than you. Between
gears he skims over miles of AM-radio static for something better, all the
while thinking about tackling the tame and mundane tasks ahead. But when
he passes through the office door, that's where the similarity stops. His
workday plays out to the sounds of rippling water and discordant din of
pumps. The pungent smell of fish fills the air.
Malone works at Saratoga National Fish Hatchery, one of the U.S. Fish
& Wildlife Service's trout brood stock hatcheries -- hatcheries that
produce fertile fish eggs to be hatched elsewhere, grown out, and stocked
primarily for fishing. And although Malone's job of keeping pumps and
essential gear in working order confines him to the hatchery, the fruits of
his and his three coworker's labor has an influence that extends far beyond
this tiny portion of the Wyoming. Saratoga National Fish Hatchery produces
fish eggs -- eventual fish that folks will try to catch as far away as
Arizona and New York.
 |
Pat
Malone, Saratoga National Fish Hatchery, spawns lake
trout.
Credit
Ed Stege/USFWS
|
Each year Saratoga produces up to 3.5 million brown trout eggs, with
half going to the USFWS mitigation hatcheries. These hatcheries were
intended to make up for, or mitigate, the sport fisheries lost to dams
built by the federal government for flood control and electric power
production. The remaining brown trout eggs from Saratoga go to Indian
tribes and states to support sport fishing. A small portion of eggs go to
research facilities where, for example, they are used to assay chemicals
for controlling parasitic lampreys.
Brown trout is but one species kept at Saratoga. Malone and his
co-workers also work with the largest trout in North America, the lake
trout. Lakers were once abundant in the Great Lakes and sustained a
commercial fishery for some time. But overharvest and accidental invasion
of the parasitic sea lamprey struck a one-two punch; laker populations hit
the canvas. But that's a trend the hatchery plays a pivotal part in
reversing.
 |
Bonnie
Johnson, USFWS fish biologist, readies a 20-pound Lewis
Lake-strain lake trout for spawning.
Credit
Dave Erdhal/USFWS |
Fortunately in the 1890s lake trout had been transported by railcars
from Lake Michigan to Cinnabar, Montana, and then by pack horse to Lewis
and Shoshone lakes in Wyoming. Descendants of the Lewis Lake transplants
were the eventual seed for a brood stock that's helping recover lake trout
far away in the Great Lakes. Adult lake trout are spawned every five years
or so at Lewis Lake, the eggs taken back to the hatchery to keep the brood
stock robust and viable.
It's apparently working. Since 1986, Lewis Lake-strain lake trout
have been stocked in Lake Huron with measured success according to Jerry
McClain, USFWS fish biologist. McClain's Alpena Fishery Resources Office
monitors the Huron fishery.
"They're surviving well," said McClain. "They're avoiding sea
lamprey, reaching adulthood, and showing up on spawning reefs."
There's another place Lewis Lake-strain fish are showing up -- the ice
chest. McClain notes that based on tagging studies, 75 percent of lake
trout angled from Huron originally came from the Saratoga hatchery.
McClain adds, "Charter boat operators like them, and the states and
tribes want to bring back the lake trout. This natural top-predator of the
Great Lakes is a great fit."
 |
USFWS
fish health biologist, Ken Peters, hangs on to a Lewis
Lake-strain lake trout. The Bozeman Fish Health Center examines
ovarian fluid from wild lakers to detect diseases.
Credit
Dave Erdahl/USFWS |
The Saratoga facility has a fortunate circumstance in common with
another brood stock hatchery, Ennis National Fish Hatchery in Ennis,
Montana. Both are free of whirling disease, thanks in part to careful
monitoring by the USFWS Bozeman Fish Health Center. Whirling disease is
insidious and in far too many trout waters across the U.S. Young trout are
most vulnerable to this sometimes debilitating disease. Fish Health
biologist, Ken Peters, says that monitoring fish health is but a small part
in disease prevention.
"Protecting the water supply, and careful consideration by hatchery
managers in keeping sanitary conditions goes a long way in keeping a
healthy brood stock," noted Peters. "Clean facilities means clean fish."
And both hatcheries have been successful; between the two of them,
millions of clean trout eggs are produced and distributed for fishing
across the U.S. Rainbows are the primary species produced at Ennis.
Twenty million eggs of six strains of rainbow trout are produced there
annually.
 |
Rainbows
from Ennis National Fish Hatchery fill angler's nets in state
and tribal waters across the country.
Credit
Craig Springer |
"Brood stock hatcheries seem to work in the shadows -- the combined
effect of these two national fish hatcheries is tremendous," said Steve
Brimm, the USFWS National Brood Stock Coordinator. "Our facilities are the
source of brown, rainbow, and lake trout eggs that benefits people in
30-plus states."
Brimm notes that a well-coordinated distribution of fish eggs assures
high genetic integrity of fish and a low occurrence of disease. Moreover,
fish coming from brood stock hatcheries stimulate the economy.
"Fishing is business in the U.S.," remarked Brimm. "There is a
multiplier effect in the economy; a dollar spent growing fish produces that
many more dollars in the economy."
 |
USFWS
fish biologist Dave Erdahl, (center) collects milt from a male
lake trout. Ken Peters, fish health biologist, lends a hand.
Credit
Bonnie Johnson/USFWS |
A recent peer-reviewed economic study bears that out. According to
USFWS economist, Dr. Jim Caudill, mitigation trout hatcheries in the
Southeast, many of whom get trout eggs from Ennis and Saratoga, are a huge
stimulus to the economy.
"Stocking trout in the southern tailwaters below dams is like pouring
fertilizer on plants," said Dr. Caudill. "Stimulate the roots a little and
the return is a bounty of fruit."
That bounty is reaped at the cash register and the county treasurer's
office. For every dollar the USFWS spends raising trout in the Southeast,
it generates $141.00 in economic effects and up to $7.85 in state and
federal taxes.
Besides putting coin in the coffer, Brimm points to another valuable
trait of the brood stock hatcheries not easily measured: know-how. When a
wild stock of fish gets in trouble, it's the technical know-how from brood
stock hatcheries that's put to use. Hatcheries play a huge role in
imperiled species conservation. Cases in point -- Arctic grayling, Apache
trout, lake trout, coaster brook trout, and greenback cutthroat trout
conservation.
"Our greenback brood stock under development at Saratoga will play a
significant role in the Colorado Division of Wildlife's effort to bring
this trout back from near extinction," said Malone. "Successes with
greenbacks are mounting and it could be the first fish ever taken off the
endangered species list."
A significant achievement indeed, and in the end, the American people
will benefit by having an intact ecosystem, and yes, more opportunity to go
fish.
As Malone turns out the lights and locks the door to head home, the
ramifications of the workday are barely perceptible. Fact is, however,
work at this small spot in southern Wyoming will send ripples across the
surface of far away waters and positively affect the lives of many people
Malone will never meet.....
 |
Lake
trout put smiles on faces. Former NFL linebacker, Tom Capelli
(l) hefts 12-pound lake trout with Phil Springer.
Credit
Craig Springer
|
All content and photos © 2001 by
Craig Springer and other credited photographers
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