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The Water “Fleas”. Bythotrephes cederstroemi (BC) & Cercopagis pengoi (CP) Neil J. Elms – 4/13/11 BIO 108R - Dr. Skinner. Spiny and Fishhook “Flea” Characteristics. 1 – 5 cm long Eye Spot Egg Pouch Tail = 70% of Total Length 1- 4 Tail Barbs Mandibles Mistaken for Daphnia.

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bythotrephes cederstroemi bc cercopagis pengoi cp neil j elms 4 13 11 bio 108r dr skinner

The Water “Fleas”

Bythotrephes cederstroemi (BC) & Cercopagis pengoi (CP)

Neil J. Elms – 4/13/11

BIO 108R - Dr. Skinner

slide2

Spiny and Fishhook “Flea”

Characteristics

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

Taxonomy

Kingdom – Animal

Phylum – Arthropoda

Subphylum – Crustacea

Class – Branchiopoda

Subclass – Phyllopoda

Order – Diplostraca

Infraorder – Onychopoda

Family - Cerpagididae

slide3

Spiny and Fishhook Origin

  • 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
slide5

“Flea” Reproduction

  • 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)
slide6

“Flea” Eco Impacts

  • 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 Eradication
    • Practice “Good Fishing Hygiene”
slide7

“Flea” Resources

  • 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 skinner1

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Bythotrephes cederstroemi (BC) & Cercopagis pengoi (CP)

Neil J. Elms – 4/13/11

BIO 108R - Dr. Skinner

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