Lake County

Crayfish Trapping with Local Youth Group

20 kids, 5-15 years old

That was the best "field trip" ever. I'm not kidding! The kids had a blast! They were so into it!

Lake County

Local Festivalsandand

Farmers Markets

Partnering with:•Minnesota Sea Grant•MN DNR•1854 Treaty Authority•County Staffy•Lake Associations

Lake, Cook Counties

Parades

St. Urho’s Day, Finland

Fishermen’s Picnic, Grand Marais

Heritage Festival, Two Harbors

Lake, St. Louis and Cook CountiesMonitoring Calcium LevelsMonitoring Calcium Levels

Slowing the Spread of the Invasive Rusty Crayfish (Orconectes rusticus)

Aquatic Invaders Summit IISummit IIOctober 6, 2016

Derrick PasseLake County SWCD

Origin – Ohio River BasinSpread by - Bait Bucket ReleaseSpread by Bait Bucket Release

- Study Specimen Release- Crayfish Boils- Water Gardens

CRAYFISH OF MINNESOTA (ADAPTED FROM WI Crayfish photo identification guide June 2012)

3. CURVED SEAMS ON BACK TOUCHING IN CENTER

Red Swamp C fi hCrayfish

Procambarus clarkii

Calico Crayfish (Orconectes immunis) Virile Crayfish (Orconectes virilis)

1. RED SPOTS ON CLAWS

2. BLACK STRIPE ON TAIL

Procambarus clarkii

5. MANY SMALL BUMPS ON SIDES

Found Sept 2016

4. ROSTRUM WEDGE

Found Sept 2016 in Tilde Lake, Clay County

Rusty Crayfish (Orconectes rusticus)Northern Clearwater Crayfish (Orconectes propinquus)

3. CLAW TIPS ORANGE WITH BLACK RING

WEDGE SHAPEDClay County

Rusty Crayfish Infestations (and Research)

in the Rainy-Lake of the Woods Watershed

WHY?Impacts • Voracious

• Denude entire bays of aquatic vegetation (Wild Rice)Denude entire bays of aquatic vegetation (Wild Rice)• Large and Aggressive

• Displace Native Crayfish

Rusty Crayfish Infested Lakes

Dumbbell Lake Vicinity

Dumbbell Lake 2005 Trapping Results

Results – 0 Crayfish per Trap Median (2) Total

Dumbbell Lake 2011 Trapping Results

Results - 15 Crayfish per Trap (Median), 166 Total

Dumbbell Lake 2015 Trapping Results

Results - 32 Crayfish per Trap (Median), 503 Total

Initiative Foundation

Stop the Spread of Rusty Crayfish into the BWCAW

Grant 2015 -Social Trapping-Public Outreach-Intensive Trapping

Boundary Waters Canoe Area WildWilderness

WICOLA

Social Trapping on

Recruit Lake Association members to trap Rusty Crayfish on their Property

White Iron Chain of Lakes

on their Property

Public Outreach and

Education

Partnering with:•Minnesota Sea Grant•MN DNR1854 Treat A thorit•1854 Treaty Authority

•County Staff•Lake Associations

Public Perceptionp

Rusty Crayfish Are:Are:

PUBLIC PERCEPTION OF RUSTY CRAYFISH

ELY BLUEBERRY FESTIVAL 7 2015FESTIVAL 7-2015

Ambivalent (red, odd, unique)

Negative (annoying, mean, nasty, invasive)

Positive (cool, tasty, delicious)

12%17%

71%

Results of Survey at Ely Blueberry Festival 2015.

Intensive Crayfish TrappingIntensive Crayfish Trapping

Summer 2015 and 2016 –4 V ili C it C ll4 Vermilion Community College Students will enter the BWCAW Daily on the Kawishiwi River and set 100 Traps for Rusty Crayfish.p y y

Intensive Crayfish Trapping – North Kawishiwi RiverKawishiwi River

Intensive CrayfishCrayfish Trapping

S th-South Kawishiwi

River

Rusty Crayfish Infestations (and Research)

in the International Rainy-Lake of the Woods Watershed

Unanswered Questions:•Where else are they?•What is their impact to Vegetation? Fishery? •Is biological control possible?•Do they self regulate?•Is trapping a feasible control mechanism?

Contact Information:Contact Information:Derrick Passe763 286-0570Derrick.Passe@CO.Lake.MN.US

Thanks to my Collaborators:USFSUSFSWhite Iron Chain of Lakes AssociationMinnesota Sea GrantWhite Iron Chain of Lakes AssociationMinnesota Sea GrantVermilion Community CollegeInitiative FoundationVermilion Community CollegeInitiative Foundation