European Green Crab Carcinus Maenas

1. European Green Crab Carcinus Maenas Giulia Castelli Laney Harrison Cori Bertero Alec Haight Shawn Rodriguez Sarafina L. A. Evans Molly McMinimy Mrs. Blechel 6th Grade Forestville Academy

2. Introduced Species Introduced Species are creatures that travel or are carried to a new habitat. Some cause harm to the native species. Some take over that habitat and start a new one. Introduced species can never become native to the new ecosystem.

3. Questions Why is the European Green Crab a problem here and not in Europe? How is the Green Crab a problem? When was population highest? What have the costs been? How did they get here?

4. The Problem Barnacles cause small, rare crabs in Europe. America crabs are abundant, large crabs.

5. Adaptations of Green Crab Feeding habits Tolerance of different environments Ability to occupy several coasts: South Africa, Australia, Japan, and both coasts of North America Easy to adapt

6. Feeding Activities Impact on the population of dogwhelks, mussels, and cockles. Preys on quahogs along coast of North America. Significant reduction of native clams and shore crab.

7. European Green Crab PopulationBodega Bay Grosholz published 2000 the impacts of a nonidigenous marine predator in a California bay Ecology Grosholz published 2000 the impacts of a nonidigenous marine predator in a California bay Ecology

8. Controlling The Green Crab Scientist Grosholz and Rivera are trying to catch all green crab in Bodega Bay Harbor. The crabs are being caught and fewer are here now. We are controlling them by keeping them from entering in the first place. In some places Crabs are being reduced by adding more restrictions on imports from out of state.

9. Comparing crabs

10. Transportation of the Green Crab Green Crabs are sometimes brought on purpose. Some are brought by planes or boats. Some are from ballast water. Some are from packing materials. Scientists think they came from the east coast of North America to Bodega Bay but they don�t know how.

11. Bodega Bay Crabs

13. Conclusions:European Green Crab It is a problem here because barnacles keep crab in control in Europe. It is killing off a lot of native species that we need. The Green Crabs highest population in Bodega Bay, was 1996 It has effected several crab industries such as the soft clam, shore crab, and even had an impact on the Dungeness Crab. The Green Crab came mostly from ballast water, packing material, and sometimes even airplanes.

14. Future Clean boat before trips Don�t bring shells back from the beach Keep watch for any green crab eggs not pick up any crabs Do beach clean ups Write to the government about the problem

15. Thank You! Mrs. Blechel Christy Bowles Vick Chow Tracy Lubas Ocean Discovery Program

16. Works Cited Washington Department of Fish and Wildlife. Aquatic Nuisance. 2001-2002. <http://wdfw.wa.gov/fish/ans/greencrab.htm#description> Grosholz,2000,Theimpiests of Nonindigenous Marine Predator in a California Bay Ecology USGS. Invaders Have Fewer Parasites, Giving Them a Competitive Edge Over Native Animals and Plants. Feb.-March 2003 <http://soundwaves.usgs.gov/2003/03> Aquatic Nuisance Species. Species: European Green Crab (Carcinus maenas). March 2007. <http://www.aquaticnuisance.org/greencrab.php>