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Bivalves: Mollusks that Matter Objective Students will understand the anatomy and physiology of mussels, and understand why they may pose health risks to humans. National Science Education Standards
Structure and Function in Living Systems (5-8) Organism Regulation and Behavior (5-8) Diversity and Adaptation of Organisms (5-8) Behavior of Organisms (9-12) Warm-Up Bring in, or ask students to bring in any seashells they have found, or go on a short preliminary field trip to collect them. Ask them to note which ones are bivalves, or those that have (or look like they had) two shell halves hinged at the top. Using identification keys, have students identify the shells by their common and scientific names. Assessment 1. Complete the Worksheet on General Bivalve Anatomy 2. Using the internet and other resources, have students create an illustration of a food chain which involves mollusks and demonstrates the process of bioaccumulation. 3. Using what they’ve learned about bivalve anatomy and doing additional research if necessary, ask students to list and explain three adaptations of mussels to their environment.
Additional Resources Man and Mollusk Resource Site http://www.manandmollusc.net/advanced_introduction/moll101pelecypoda.html National Oceanographic and Atmospheric Administration Blue mussel: http://www.csc.noaa.gov/lcr/nyharbor/html/gallery/sgmytilu.html Northern quahog: http://www.csc.noaa.gov/lcr/nyharbor/html/gallery/sgmercen.html California Mussel: http://www.ocnms.nos.noaa.gov/LivingSanctuary/mussel.html Scallop Eyes http://www.iac-usnc.org/Methods/scallop/eyes.html Freshwater Mussels http://www.inhs.uiuc.edu/~ksc/MusselGenera.html http://www.bio.umass.edu/biology/conn.river/fwmussel.html Bivalve Slide Show http://nighthawk.tricity.wsu.edu/museum/ArcherdShellCollection/SlideShows/Bivalve_Slide_Show2.html Oyster Anatomy http://www.mdsg.umd.edu/oysters/anatlab/ http://www.wsg.washington.edu/oysterstew/cool/oyster_diagrams.html
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