1 / 9

M ollusca Bivalvia

M ollusca Bivalvia. Introduction. Class Bivalvia Formerly known as Pelecypoda There are more than 15 thousand species of: Mussels Oysters Scallops Clams Numerous other families of shells. Characteristics. All shells have two pieces known as valves In most, valves are similar size.

telyn
Télécharger la présentation

M ollusca Bivalvia

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Mollusca Bivalvia

  2. Introduction • Class Bivalvia • Formerly known as Pelecypoda • There are more than 15 thousand species of: • Mussels • Oysters • Scallops • Clams • Numerous other families of shells

  3. Characteristics • All shells have two pieces known as valves • In most, valves are similar size. • Shells vary greatly in size, color, and ornamentation • The foot of bivalves is adapted for burrowing in all species, except for the sedentary ones • Some use the foot to hop from place to place • Some have siphons • Most have single pair of large gills • Used for respiration • Used for trapping food particles

  4. Giant Clam Fresh Water Mussels • Freshwater mussels can be less than .1 inches • Giant clam shell can exceed 4 feet in length • 582 pounds • Can live up to 40 years

  5. Feeding • Filter Feeders & how they work • Plankton, larvae, eggs and detritus • Modern issues in filter feeding • Susceptibility to harmful pollutants • Algal blooming • Effects on humans

  6. Making Pearls ! • All bivalves make pearls • Sand gets embedded in the mantle • Secretion of aragonite and conchiolin

  7. Evolution • Development of simple eyes in swimming bivalves • After the ability to swim • Ability to burrow • Foot • sihpons • No need to develop a head • Evolution of their shell • Scallop video

  8. References • Elevel, Martina. "Mussels and Clams (Bivalvia)." Bivalvia. N.p., n.d. Web. 26 Mar. 2014. <http://www.molluscs.at/bivalvia/index.html?/bivalvia/main.html>. • Morton, Brian. "Food and Feeding." Encyclopedia Britannica Online. Encyclopedia Britannica, n.d. Web. 26 Mar. 2014. <http://www.britannica.com/EBchecked/topic/67293/bivalve/35739/Food-and-feeding>. • "Water Encyclopedia." Bivalves. N.p., n.d. Web. 26 Mar. 2014. http://www.waterencyclopedia.com/Bi-Ca/Bivalves.html • "Mollusks." Mollusks. N.p., n.d. Web. 26 Mar. 2014. <http://www.mbgnet.net/salt/oceans/animals/mollusk.htm>. • Madrigal, Alexis C. "Did You Know Scallops Have *Eyes*? Me Neither, but Look." The Atlantic. Atlantic Media Company, 28 Mar. 2013. Web. 01 Apr. 2014. <http://www.theatlantic.com/technology/archive/2013/03/did-you-know-scallops-have-eyes-me-neither-but-look/274469/>.

More Related