Red swamp crayﬁsh • Red swamp crayﬁsh is the most widespread invasive crayﬁsh in the United States and the world.
Red swamp crayﬁsh in Washington 2000: ﬁrst discovered in Pine Lake Silver during a WDFW ﬁsh survey (Karl Mueller, 2001) Steel Easter North Beaver 2007-‐2012: We surveyed 120+ lakes in Geneva in western WA and discovered 9 addi>onal invaded lakes. Pine Five Mile Trout Surprise
Signal vs. red swamp crayﬁsh Signal crayﬁsh Red swamp crayﬁsh • Sexually maturity: 2 years • Sexually maturity: 1.5 years • Ma>ng occurs late summer • Ma>ng occurs all summer • 50-‐200 eggs/female • 400-‐600 eggs/female • Incuba>on >me: 10 months • Incuba>on >me: 1-‐2 • Lifespan: 4-‐8 years months • Lifespan: 2-‐4 years • Very aggressive and high ecological impacts K. Mueller
Goal • To control the popula>on of red swamp crayﬁsh in Pine Lake using the ﬁrst volunteer-‐based whole-‐lake removal • Enhance the health of na>ve signal crayﬁsh and ﬁsh (trout, bass, sunﬁsh) in Pine Lake • Promote public educa>on regarding invasive species • Serve as a model for other future removal eﬀorts
Is this even possible? Sparkling Lake, WI K. Hein
Yes, it is possible for Pine Lake Rou>ne Olden survey loca>ons
Crayﬁsh trends over 6me 12 Ra6o of Red Swamp to Signal 10 8 First survey Caryﬁsh (Karl Mueller) 6 Red swamp 4 discovered 2 0 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 Olden lab surveys
Protocols • Dura>on: Today-‐ November 30th, 2013 • Set a weekly schedule • We will be on the lake June, July, Aug, Sept, (middle of month) • Mid-‐summer and end-‐ summer checkin