great lakes updates - ottawa county...great lakes updates invasive species lake sturgeon restoration...
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Great Lakes UpdatesGreat Lakes Updates
Invasive SpeciesInvasive SpeciesLake Sturgeon RestorationLake Sturgeon Restoration
Ottawa County Water Quality ForumOttawa County Water Quality ForumOctober 26, 2009October 26, 2009
Dan ODan O’’Keefe, Ph.D.Keefe, Ph.D.Michigan Sea Grant/MSUEMichigan Sea Grant/MSUE
Purple loosestrifePurple
loosestrife
Zebra musselsZebra mussels
Eurasian ruffe
Sea lampreySea lamprey
Spiny waterflea
CorbiculaCorbicula
White perchWhite perch
Rusty crayfish
Common carpCommon carp
Threespine sticklebackThreespine stickleback
Rainbow smelt
Rainbow smelt
AlewifeAlewife
American eelAmerican eel
Round GobyRound Goby
New Zealand New Zealand MudsnailMudsnail
-- Grazes on attached algaeGrazes on attached algae
-- Can pass through gut of Can pass through gut of fish or bird unharmedfish or bird unharmed
-- Lives in all types of river Lives in all types of river and reservoir habitatsand reservoir habitats
-- SelfSelf--cloning femalescloning females
-- Reaches densities of 300Reaches densities of 300--700,000 per m700,000 per m22
DidymoDidymo
-- Diatom Diatom DidymospheniaDidymosphenia geminatageminata
-- Smothers habitat in streamsSmothers habitat in streams
-- Anglers transport on wadersAnglers transport on waders
-- Impossible to controlImpossible to control
-- Anglers asked to disinfect Anglers asked to disinfect and dry waders after and dry waders after wading in infested riverwading in infested river
Since 2005: Since 2005:
South DakotaSouth Dakota
VermontVermont
TennesseeTennessee
VirginiaVirginia
New HampshireNew Hampshire
MarylandMaryland
New YorkNew York
JANUARY 2009JANUARY 2009
Asian CarpAsian CarpComing soon to a river near you?Coming soon to a river near you?
Reproductive RequirementsReproductive Requirements
•• Silver carp: 64Silver carp: 64--7272°° FF•• Bighead carp: >72Bighead carp: >72°° FF•• Both require a rise in water Both require a rise in water
level (or turbidity?)level (or turbidity?)•• Both require ~30 miles of Both require ~30 miles of
freefree--flowing river flowing river upstream of lake/bayouupstream of lake/bayou
Kolar et al. 2005
CalCal--Sag and Chicago Sanitary and Ship Canal showing details of Sag and Chicago Sanitary and Ship Canal showing details of the connection to the Mississippi River Basin via the Illinois Rthe connection to the Mississippi River Basin via the Illinois River and iver and the location of the Aquatic Nuisance Species Barriers.the location of the Aquatic Nuisance Species Barriers.
Image from Alliance for the Great Lakes
asiancarp.org photo
An ounce of preventionAn ounce of prevention……
ROUND GOBYROUND GOBY
•• Ballast introductionBallast introduction•• Extremely tolerantExtremely tolerant•• Density >20/mDensity >20/m33
•• Rapid expansion Rapid expansion since 1990since 1990
Demise of a Fishery…
1879: 3.8 million lbs.1879: 3.8 million lbs.1920: 2,000 lbs.1920: 2,000 lbs.
St. Mary’s U. of Minnesota Map
Historic Sturgeon Distribution
Muskegon R.
Grand R.Kalamazoo R.St. Joseph R.
Is Sturgeon Restoration Possible?
Habitat Concerns
Low Numbers of Adult Spawners
Increased Benthic Productivity
Lamprey Parasitism
Poaching of Spawning Adults
•• 30 days in jail30 days in jail•• $2,298 in fines$2,298 in fines•• 50 hrs. DNR work50 hrs. DNR work•• Fishing license Fishing license
suspended until 2012suspended until 2012
Current Activities
Display at Outdoor Discovery Center
Tribal Wildlife Grant for Early Life History
Poaching Prevention and $1,000 Reward
Volunteer Sampling for Eggs
Habitat Improvements?
MDNR Photo