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Spiny waterfleas eat small animals like Zooplankton and Daphnia, which are very important food for the native fishes. In many lakes, they eliminated some species of native zooplankton. Where were they introduced? Spiny Water Fleas were spread from Lake Ontario to Lake Superior. When were they introduced? Spiny Water Fleas were introduced to Lake Superior in 1987. When were they introduced? Spiny Water Fleas were introduced in 1987. Why were they introduced? Spiny Water Fleas were introduced by "ballast" water dumped out of from a ship. What changes have been observed in the ecosystem since their introduction? They tend to make the eyelets of fishing rods clogged and keep fish from being landed. How have other organisms been affected? Spiny Water Fleas eat small animals like Zooplankton and Daphnia, which are very important food for the native fishes. In many lakes, they eliminated some species of native Zooplankton. They were first discovered in Lake Ontario in 1982. Where can they be found today? Lake Ontario, Lake Michigan and several lakes in New York. DISTRIBUTION EFFECTS ON ECOSYSTEMS REASONS FOR SUCCESS http://www.seagrant.umn.edu/ais/waterflea http://www.looktvonline.com/battling-the-spiney-water-flea http://www.northeastans.org/online-guide/species-information.html?SpeciesID=17 What information can you find about the species that might explain why they are successful in their new environment? Many fish in the Great Lakes are able to feed on spiny water fleas such as: Yellow perch, White perch, Walleye, White bass, Alewife, Bloater chub, Chinook salmon, Emerald shiner, Spottail shiner, Rainbow smelt, Lake herring, Lake whitefish and Deepwater sculpin. http://fwcb.cfans.umn.edu/courses/nresexotics3002/GradPages/spinywaterflea/Impacts.htm EFFECTS ON PEOPLE How do people use/interact with this species? What, if any, consequences are there for humans? Are there attempts to control the growth or spread of this species? ISSUES FOR THE FUTURE http://www.protectyourwaters.net/hitchhikers/crustaceans_spiny_water_flea.php If our fishermen interacted with this invasive species, they would clog more fishing rods than they already do. In order to control the growth of the species, they are asking people to carefully examine the lakes and their belongings and report it to them if they see any traces of Spiny Water fleas. Some trade offs might be that most people don’t have time to report it and if they don’t report it, it’ll take a while for them to figure out where the Spiny Water Fleas are located. So their best option is to find a way to get rid of Spiny Water fleas for good but to do no harm to other species in the lakes as well. REFERENCE LIST http://fwcb.cfans.umn.edu/courses/nresexotics3002/GradPages/spinywaterflea/Impacts.htm http://dnr.wi.gov/org/caer/ce/eek/critter/insect/waterflea.htm http://www.dnr.state.mn.us/invasives/aquaticanimals/spinywaterflea/index.html http://nas.er.usgs.gov/queries/factsheet.aspx?SpeciesID=162 http://www.protectyourwaters.net/hitchhikers/crustaceans_spiny_water_flea.php