Bythotrephes cederstroemi (BC) & Cercopagis pengoi (CP)Neil J. Elms – 4/13/11 BIO 108R - Dr. Skinner

TaxonomyKingdom – AnimalPhylum – ArthropodaSubphylum – CrustaceaClass – BranchiopodaSubclass – PhyllopodaOrder – DiplostracaInfraorder – OnychopodaFamily - Cerpagididae

• 1 – 5 cm long• Eye Spot• Egg Pouch• Tail = 70% of Total Length• 1- 4 Tail Barbs• Mandibles• Mistaken for Daphnia

• Eurasia – Black, Caspian, Aral, Azov, & Baltic Seas• Great Lakes 1980’s - 90’s; Finger Lakes 2000• Ballast Tank Stowaways

• United States• Commercial and Sport Fishing Gear• Nets, Downriggers, Live Wells

• Spiny

• Fishhook

• Days to a Week Long Life Span• Both, Sexually and Asexually• Up to 13 Clones Every 10 Days (May thru September)• Brood Pouch

• Developing Embryos• Female Clones (May thru August)

• Dies After Cloning• Resting / Dormant Eggs

• Male and/or Female (1-2 Eggs)

• Eat and Compete with Native Zooplankton (Daphnia)• Rapid Reproduction / Cloning Leads to Eutrophication• Comfortable in Clear and Brackish / Fresh and Salt• Success at Various Water Columns• Adaptive

• No Tail Molts to Ensure Continuous Protection• Temperature Regulates Population• Dormant Eggs Carried Thru Poor Conditions• Size

• Avoided by Fry• Choke and Suffocate Fry with Tail Barbs

• Depletes Food Resources for Larger Fish, Birds and Humans

• No Known Method of Control or EradicationPractice “Good Fishing Hygiene”

www.caspianenvironment.org/biodb/eng/zooplankton/Cercopagis%20pengoi/main.htm

www.westsidenews.net/OldSite/westside/news/2001/0122/features/lakestudy.html

www.great-lakes.net/envt/flora-fauna/invasive/spinyflea.html

www.dnr.wi.gov/org/caer/ce/eek/critter/insect/waterflea.htm

www.glerl.noaa.gov/seagrant/cercopagis/cercopagisID.htm

www.epa.gov/grtlakes/monitoring/exotics/cercopagis.html

www.gfawesome.org/mad_science/activities.html

www.seagrant.umn.edu/education/index.html

www.epa.gov/region5/enved/resources.html

www.seagrant.umn.edu/exotics/spiny.html

www.dnr.wi.gov/invasives/fact/spiny.htm

www.iiseagrant.org/EXOTICSP/

Bythotrephes cederstroemi (BC) & Cercopagis pengoi (CP)Neil J. Elms – 4/13/11 BIO 108R - Dr. Skinner