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Sea Lampreys!

Sea Lampreys!. By: !!. What Are Sea Lampreys?. They are an eel-like fish that prey on other fish by sucking out their blood and body fluids Also called, lamprey, spotted lamprey, eel sucker, lamper

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Sea Lampreys!

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  1. Sea Lampreys! By: !!

  2. What Are Sea Lampreys? • They are an eel-like fish that prey on other fish by sucking out their blood and body fluids • Also called, lamprey, spotted lamprey, eel sucker, lamper • Originally from the Atlantic Ocean, sea lampreys accidentally found their way to the Great Lakes • Their prey includes: lake trout, salmon, whitefish, walleye, catfish, rainbow fish, chubs, burbot, and sturgeon

  3. How Did it Get Here? • Sea Lampreys were originally from the Atlantic Ocean • They found their way to the Great Lakes by man-made shipping canals • They first appeared in Lake Ontario in the 1830’s

  4. The Life Cycle of the Sea Lamprey • Before sea lampreys die, they swim upstream to spawn. • The larvae hatch from the eggs and burrow into the bottom of the streams. • The larvae turn into the adult in 3-6 yrs. • They spend 12-20 months feeding on fish after migrating to the Great Lakes. • The sea lamprey’s life cycle takes about 5-8 yrs.

  5. Why Have They Succeeded? • They have no natural enemies • Fishermen have no reason to catch and kill them, they are no value to fishermen

  6.  Problems For Us!  • Because of the sea lamprey, the fish harvest has decreased greatly. • Before: Canada & the U.S. harvested 15 million pounds of fish each year. After: it was only 300,000 pounds.

  7. How Do They Affect The Ecosystem? • The fisheries are devastated. • No natural predators in Great Lakes. • The fish population went down drastically.

  8.  Benefits of Sea Lamprey  • Sea lampreys bring important nutrients to freshwaters. • They are a food source to mammals, birds, some fish, and sometimes, even people!

  9. What Are They Doing Now? • In 1955 the Great Lakes Fishery Commission was created. Because of it, sea lamprey populations have decreased 90%. • Some of the methods people have used were to put up traps, barriers, sterile-male-release, and lampricide control.

  10. How Do These Methods Work? • Lampricide control- kills larvae, doesn’t harm other fish • Barriers- stop them from spawning • Sterile-male-release- they release sea lampreys after the larvae stage, because they don’t kill as much fish in the adult stage

  11. Other Fast Facts • They suck blood by attaching a sucking disk and many sharp teeth • 1 of 7 fish will survive • Adults can kill 40 lbs of fish • They can swim great speeds, but short distances

  12. Bibliography • Baggio, Anna. "Sea Lamprey." Hamilton Harbour. 24 Apr. 2008 <http://www.science.mcmaster.ca/Biology/Harbour/SPECIES/SEALAMP/TITLE.HTM>. • Myers, John. "Lamprey Numbers Skyrocket." Duluth News-Tribune 26 Aug. 2005. Newspaper Source. EBSCO. Harding IMC, Cedar Rapids. Apr. 2008. • "Sea Lamprey." 24 Apr. 2008 <http://www.krisweb.com/krissheepscot/krisdb/html/krisweb/biblio/gen_xxxx_kircheis.2004_lamprey.pdf>. • "Sea Lampreys: a Great Lakes Invader." Sea Lamprey Control. Great Lakes Fishery Commission. 22 Apr. 2008 <http://www.glfc.org/lampcon.php#damage>. • "Sea Lamprey." USGS. 2 Oct. 2007. Upper Midwest Environmental Sciences Center. 24 Apr. 2008 <http://www.umesc.usgs.gov/invasive_species/sea_lamprey.html>.

  13. Thanks!!! ☻♥☻♥☻♥☻♥☻♥☻♥☻♥☻ ☻♥☻♥☻♥☻♥☻♥☻ TheEnd!!!!

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