DNR uses shock method to search for silver carp

  • Article by: DENNIS ANDERSON , Star Tribune
  • Updated: August 19, 2011 - 2:50 AM
hide

A DNR fisheries crew on the St. Croix River employed shocking techniques to briefly stun fish and float them to the surface on Tuesday morning near Taylors Falls. The DNR was looking for silver carp, one of four invasive Asian carp species.

Photo: Dennis Anderson, Star Tribune

CameraStar Tribune photo galleries

Cameraview larger

ON THE ST. CROIX RIVER - Possibly be-sieged by another aquatic critter that threatens untold destruction, the Department of Natural Resources on Monday and Tuesday dispatched fisheries crews here to set nets and send shock waves into the water in search of the latest targeted invasive species: the silver carp.

None was found.

The DNR announced last week special water tests conducted in June designed to detect traces of Asian carp indicated the possibility that silver carp -- the one whose Illinois River aerial acrobatics have won thousands of YouTube hits -- are in the St. Croix River.

Of 50 water samples checked approximately between Taylors Falls downstream a few miles to Franconia, 22 "environmental DNA" positives were returned, a rate high even by standards of the heavily infested Illinois.

The tests don't confirm the carp's presence, and the DNR's efforts at electrofishing and netting represent a first attempt to see if one or more silver carp can be put in hand.

In coming weeks, commercial fishermen under contract to the DNR also will string nets across the St. Croix.

"The commercial fishermen will probably have a better chance to catch one, if there's one in the river," said Jerry Johnson, DNR area fisheries supervisor for the east metro.

No silver carp have ever been caught in the St. Croix. A bighead carp -- one of three other unwanted fish of the Asian variety, along with the grass and black carp -- was netted by a commercial fisherman earlier this year in the St. Croix near Prescott, Wis.

Tuesday's effort was led by DNR large rivers fisheries specialist Joel Stiras. He's one of two agency workers who traveled to Illinois recently to watch fisheries experts corral silver carp using electrofishing and netting -- the same techniques employed on the St. Croix.

Two boats were used Tuesday. Stiras piloted one, an electro-shocking craft, as two helpers in the bow with long-handled nets retrieved and inspected stunned fish. Another three-man DNR crew set gill nets.

The nets had relatively large mesh sizes, 4, 5 and 6 inches, and Stiras and his crew attempted to steer fish toward them.

Asian carp reproduce rapidly and can quickly change a river's ecosystem, out-competing game fish for food and also putting water birds at risk.

DNR crews will return to the St. Croix daily at least through Friday.

  • get related content delivered to your inbox

  • manage my email subscriptions

Click here to send us your hunting or fishing photos – and to see what others are showing off from around the region.

ADVERTISEMENT

NY Yankees - LP: B. McCarthy 3 FINAL
Toronto - WP: J. Happ 4
Philadelphia - LP: A. Burnett 5 FINAL
NY Mets - WP: D. Gee 6
Cincinnati - WP: J. Cueto 3 FINAL
Pittsburgh - LP: J. Hughes 2
Minnesota - LP: R. Nolasco 8 FINAL
Baltimore - WP: W. Chen 12
Boston - WP: C. Buchholz 3 FINAL
Tampa Bay - LP: A. Cobb 0
Detroit - LP: R. Porcello 2 FINAL
Chicago WSox - WP: J. Quintana 6
Texas - LP: N. Cotts 2 FINAL
Houston - WP: J. Veras 3
Chicago Cubs - LP: C. Villanueva 6 FINAL
St. Louis - WP: P. Neshek 9
Oakland - LP: S. Kazmir 1 FINAL
LA Angels - WP: M. Shoemaker 8
Milwaukee - LP: K. Lohse 5 FINAL
San Francisco - WP: M. Bumgarner 15
Los Angeles - WP: H. Ryu 7 FINAL
San Diego - LP: E. Stults 1
Washington - LP: T. Roark 3 FINAL
Seattle - WP: H. Iwakuma 5
Colorado - LP: J. De La Rosa 2 FINAL
Arizona - WP: C. Anderson 6
Miami - LP: N. Eovaldi 0 FINAL
Atlanta - WP: A. Wood 1
Cleveland 4 Suspended
Kansas City 2
Green Bay 9/4/14 7:30 PM
Seattle
Troy 10 FINAL
UAB 48
(7) UCLA 28 FINAL
Virginia 20
Western Mich 34 FINAL
Purdue 43
(5) Ohio State 34 FINAL
Navy 17
Appalachian St 14 FINAL
Michigan 52
Ga Southern 23 FINAL
NC State 24
Boston College 30 FINAL
Massachusetts 7
West Virginia 23 FINAL
(2) Alabama 33
Rice 17 FINAL
(17) Notre Dame 48
(10) South Dakota St 18 FINAL
(24) Missouri 38
Fla Atlantic 7 FINAL
(22) Nebraska 55
California 31 FINAL
Northwestern 24
Marshall 42 FINAL
Miami-Ohio 27
UC Davis 0 FINAL
(11) Stanford 45
Arkansas 21 FINAL
(6) Auburn 45
(16) Clemson 21 FINAL
(12) Georgia 45
Liberty 29 FINAL
(23) North Carolina 56
Ohio U 17 FINAL
Kent State 14
Louisiana Tech 16 FINAL
(4) Oklahoma 48
Stephen F Austin 16 FINAL
(20) Kansas State 55
Fresno State 13 FINAL
(15) USC 52
Southern Miss 0 FINAL
Miss State 49
Texas-El Paso 31 FINAL
New Mexico 24
North Texas 7 FINAL
Texas 38
(1) Florida State 37 FINAL
Oklahoma State 31
(14) Wisconsin 24 FINAL
(13) LSU 28
Idaho 0 Postponed
Florida 0
South Dakota 13 FINAL
(3) Oregon 62
(25) Washington 17 FINAL
Hawaii 16
Utah State 7 FINAL
Tennessee 38
SMU 0 FINAL
(10) Baylor 45
Miami-Florida 7:00 PM
Louisville
Arizona 9/4/14 7:00 PM
TX-San Antonio
Pittsburgh 9/5/14 6:00 PM
Boston College
Washington St 9/5/14 9:30 PM
Nevada
SMU 9/6/14 11:00 AM
North Texas
Fla Atlantic 9/6/14 11:00 AM
(2) Alabama
Buffalo 9/6/14 11:00 AM
Army
(24) Missouri 9/6/14 11:00 AM
Toledo
Arkansas State 9/6/14 11:00 AM
Tennessee
(8) McNeese State 9/6/14 11:00 AM
(22) Nebraska
Central Mich 9/6/14 11:00 AM
Purdue
Akron 9/6/14 11:00 AM
Penn State
Western Ill 9/6/14 11:00 AM
(14) Wisconsin
(20) Kansas State 9/6/14 11:00 AM
Iowa State
(4) Oklahoma 9/6/14 11:00 AM
Tulsa
Western Ky 9/6/14 11:00 AM
Illinois
SC State 9/6/14 11:30 AM
(16) Clemson
Navy 9/6/14 12:00 PM
Temple
UAB 9/6/14 1:00 PM
Miss State
South Alabama 9/6/14 1:00 PM
Kent State
New Mexico St 9/6/14 1:00 PM
Georgia State
Colorado 9/6/14 2:00 PM
Massachusetts
Fresno State 9/6/14 2:00 PM
Utah
(1) Eastern Wash 9/6/14 2:00 PM
(25) Washington
(15) USC 9/6/14 2:30 PM
(11) Stanford
Ohio U 9/6/14 2:30 PM
Kentucky
Middle Tennessee 9/6/14 2:30 PM
Minnesota
Northern Ill 9/6/14 2:30 PM
Northwestern
Missouri State 9/6/14 2:30 PM
Oklahoma State
Ball State 9/6/14 2:30 PM
Iowa
Maryland 9/6/14 2:30 PM
So Florida
Eastern Mich 9/6/14 3:00 PM
Florida
Georgia Tech 9/6/14 3:00 PM
Tulane
(18) Ole Miss 9/6/14 3:30 PM
Vanderbilt
Old Dominion 9/6/14 5:00 PM
NC State
(8) Michigan State 9/6/14 5:30 PM
(3) Oregon
(19) Arizona State 9/6/14 6:00 PM
New Mexico
Louisiana Tech 9/6/14 6:00 PM
Louisiana
San Jose St 9/6/14 6:00 PM
(6) Auburn
East Carolina 9/6/14 6:00 PM
(9) So Carolina
Duke 9/6/14 6:00 PM
Troy
Idaho 9/6/14 6:00 PM
ULM
(17) Sam Houston St 9/6/14 6:30 PM
(13) LSU
Michigan 9/6/14 6:30 PM
(17) Notre Dame
Lamar 9/6/14 6:30 PM
(21) Texas A&M
Northwestern St 9/6/14 6:30 PM
(10) Baylor
BYU 9/6/14 6:30 PM
Texas
Citadel 9/6/14 6:30 PM
(1) Florida State
San Diego St 9/6/14 7:00 PM
(23) North Carolina
Virginia Tech 9/6/14 7:00 PM
(5) Ohio State
Memphis 9/6/14 9:00 PM
(7) UCLA
Colorado State 9/6/14 9:15 PM
Boise State
Air Force 9/6/14 9:15 PM
Wyoming
Oregon State 9/6/14 9:30 PM
Hawaii
Texas Tech 9/6/14 10:00 PM
Texas-El Paso
Red Bull New York 0 FINAL
D.C. 2
Los Angeles 3 FINAL
Chivas USA 0
Ottawa 10 FINAL
Montreal 20
Winnipeg 30 FINAL
Saskatchewan 35
Toronto 12:00 PM
Hamilton
Edmonton 3:30 PM
Calgary
Phoenix 77 FINAL
Minnesota 82
Connect with twitterConnect with facebookConnect with Google+Connect with PinterestConnect with PinterestConnect with RssfeedConnect with email newsletters

ADVERTISEMENT

ADVERTISEMENT

ADVERTISEMENT

ADVERTISEMENT

question of the day

Poll: Should the lake where the albino muskie was caught remain a mystery?

Weekly Question

ADVERTISEMENT

 
Close