Follow the instructions on the slides that follow: View the images and take notice of what the names are. Visit the links given (and visit others as necessary). Answer all questions posed. State your answers in complete sentences and write in your own words. Use the same numbering and lettering system as in the slide show.

I. The Periwinkle

Visit the links below and answer the following: 1. When and where did the common periwinkle first arrive in North America? 2. What may be some of the explanations as to how the periwinkle arrived here in North America? 3. Is the periwinkle a primary consumer or a secondary consumer? Support your answer. 4. How is the periwinkle adapted to its environment? (ie. Describe its adaptations- those features, characteristics, or traits that allow it to successfully survive in its environment). 5. In what areas of the world are periwinkle eaten?

II. The Whelk The dog whelk looks similar in size to the periwinkle but it has more of a pointed top; the whelk is a small snail similar in size to the periwinkle. 6. How does the whelk’s means of nutrition differ from that of the periwinkle?

III.Bar Clams _profiles/species/clams/species_p ages/atlantic_surfclam.htm _profiles/species/clams/species_p ages/atlantic_surfclam.htm xport/product?id=55 xport/product?id=55 7. Bar clams are sometimes called surf clams, due to where they may be found. Describe their adaptation for this environment. 8. How are these clams usually eaten?

IV. Soft Shell Clams rt/product?id=57&i=1 rt/product?id=57&i=1 8.Account for their name. 9.Where in PEI are they usually found? Why are these clams the preferred clam to eat over the bar clam? 10. Why have areas on PEI where people back in the 1970’s went clam digging restricted to this practice (at least at times) 11. How are these clams usually eaten? 12. What is the minimum size for these clams if they are to be harvested? ayclams/images/softshell_web_ODFW.gif

V. Quahog

The quahog is harvested and eaten on PEI basically the same as a bar clam would be. They can be recognized as a quahog (and not a bar clam) as the hinge (umbo) is way off centre, the outer edge is serrated, and inside the shell the mother-of-pearl is found around the edges and is either purple or white. Jewelry can be made from the mother-of-pearl.

VI. Oysters Go to Click “External Anatomy”. Read the information (to the end of number 6 in the web site), click on the figures (images), and work through the questions below. 13. What are the valves of an oyster? 14. How many valves does an oyster have? 15. What general name is given to a mollusk with this many shells? 16. Describe the shape and size of the valves of the oyster.

17. Completely distinguish between the umbo and the bill (in terms of location, shape, and age. Note: Anterior refers to the “head” region, and posterior refers to the “hind” region. 18. What is the dark image found on the inside surface of each shell of the oyster? 19. What is the function of the adductor muscle in bivalves? Return to “Oyster Anatomy Laboratory” (or press the back arrow  ). Select “Internal Anatomy”. Proceed through the information and look at the figures. Answer the questions found on the next slide.

20.What is shucking? 21. What is the mantle and describe its functions. 22. What is one function of the tentacles? 23. Observe the images of the gills. Describe their appearance. 24. State the functions of the gills. 25. Label the diagram of the oyster provided to you by your teacher.

Go to How long have oysters been part of our Island’s seafood industry? Go to (or you can access this through the previous link by clicking on the pdf file under “How are PEI Oysters Cultivated) 27. Describe how oysters are harvested. 28. Watch the video on “How to Shuck Oysters” at What are probably the best known oysters in the world in terms being eaten in restaurants).

VII. Mussels There are 3 main mussels on PEI: blue mussel, ribbed mussel, and horse mussel. The blue mussel is the edible one. Go to xport/product?id=52&i=1 xport/product?id=52&i=1 30. How are cultured mussels grown? 31. What is the function of the threads in the muscle?

VIII Scallops are-scallops.htm are-scallops.htm 32. What part of the scallop is eaten in this area of the world? Interesting fact: Scallops can “swim” for short distances by clapping their shells together, squirting out water that propels them forward.

IX Moon Snail Large carnivorous snail found our Island waters. It uses its rasping tongue to drill a hole into clam shells. It then feeds on the soft body inside the shell.

X Limpets eseashore/SpeciesPages/Limpets.j pg.html eseashore/SpeciesPages/Limpets.j pg.html 33. How are limpets adapted to survive during low tide? (3 rd paragraph on the web site).