Phylum Mollusca<br />Almost all have the following in common:<br /><ul><li>Shell
Mantle
Foot
Radula</li></li></ul><li>Phylum MolluscaClams, Cockles, Mussels - Class Bivalvia<br />All possess a hinged two-valved shel...
Phylum MolluscaShell, Mantle, Foot, Radula<br />
Phylum MolluscaClams, Cockles, Mussels - Class Bivalvia<br />
Phylum Mollusca Clams, Cockles, Mussels - Class Bivalvia<br />
Phylum Mollusca Clams, Cockles, Mussels - Class Bivalvia<br />Blue Mussel- Mytilus sp.<br />Suspension feeders<br />Very l...
Phylum Mollusca Clams, Cockles, Mussels - Class Bivalvia<br />Giant Pacific Oyster Crassostrea sp.<br />Sedentary<br />Blu...
Phylum Mollusca Clams, Cockles, Mussels - Class Bivalvia<br />Mahogany Clam Nuttallia sp.<br />Most common clam on our bea...
Phylum Mollusca Clams, Cockles, Mussels - Class Bivalvia<br />Soft shell Clam Mya  sp.<br />Shells suited to their name.<b...
Phylum Mollusca Clams, Cockles, Mussels - Class Bivalvia<br />GeoducksPanopea sp <br />The world’s largest burrowing clam ...
Phylum Mollusca Clams, Cockles, Mussels - Class Bivalvia<br />The Heart  Cockle Clinocardium sp.<br />Shallow burrowers<br...
Phylum Mollusca Clams, Cockles, Mussels - Class Bivalvia<br />The swimming scallop Chlamys sp.<br />Some bivalves can swim...
Phylum MolluscaSquid and Octopus - Class Cephalopoda<br />The record breakers<br />The largest<br />The fastest<br />The s...
Phylum Mollusca Squid - Class Cephalopoda<br />The market squid<br />Loligo sp.<br />8 long arms and two tentacles<br />Sp...
Phylum Mollusca Squid - Class Cephalopoda<br />The market squid<br />Loligo sp.<br />Have corneas over<br />	 their eyes<b...
Phylum Mollusca Squid - Class Cephalopoda<br />The market squid<br />Loligo sp.<br />They have <br />chromatophores<br />C...
Phylum Mollusca Octopus - Class Cephalopoda<br />The giant pacific octopus Octopus sp.<br />Have 8 arms but no tentacles<b...
Phylum Mollusca Octopus - Class Cephalopoda<br />The red octopus Octopus sp.<br />Not only can they change colour they can...
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4. molluscs clams and octopus

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Transcript of "4. molluscs clams and octopus"

  1. 1. Phylum Mollusca<br />Almost all have the following in common:<br /><ul><li>Shell
  2. 2. Mantle
  3. 3. Foot
  4. 4. Radula</li></li></ul><li>Phylum MolluscaClams, Cockles, Mussels - Class Bivalvia<br />All possess a hinged two-valved shell.<br />Shells are composed of Calcium carbonate.<br />Body flattened laterally.<br />Lack of cephalization<br />Do not have a radula<br />
  5. 5. Phylum MolluscaShell, Mantle, Foot, Radula<br />
  6. 6. Phylum MolluscaClams, Cockles, Mussels - Class Bivalvia<br />
  7. 7. Phylum Mollusca Clams, Cockles, Mussels - Class Bivalvia<br />
  8. 8. Phylum Mollusca Clams, Cockles, Mussels - Class Bivalvia<br />Blue Mussel- Mytilus sp.<br />Suspension feeders<br />Very large gills that collect food particles<br />Great to eat, but also great sentinels for the environment<br />
  9. 9. Phylum Mollusca Clams, Cockles, Mussels - Class Bivalvia<br />Giant Pacific Oyster Crassostrea sp.<br />Sedentary<br />Blue mussels attach<br /> by byssal threads<br /> the oysters cement to <br /> rocks<br />Oysters are ambisexual. Start out as males for three years then become female.<br />
  10. 10. Phylum Mollusca Clams, Cockles, Mussels - Class Bivalvia<br />Mahogany Clam Nuttallia sp.<br />Most common clam on our beach<br />Introduced to our beaches 20 years ago, range is from Puget sound to Alaska?<br />
  11. 11. Phylum Mollusca Clams, Cockles, Mussels - Class Bivalvia<br />Soft shell Clam Mya sp.<br />Shells suited to their name.<br />Located near fresh water streams<br />Develop leukemia if habitat is contaminated with PCBs<br />
  12. 12. Phylum Mollusca Clams, Cockles, Mussels - Class Bivalvia<br />GeoducksPanopea sp <br />The world’s largest burrowing clam (up to seven pounds)<br />Can live for 150 years or more!<br />Most of the population is subtidal but may find them at a 0m tide<br />
  13. 13. Phylum Mollusca Clams, Cockles, Mussels - Class Bivalvia<br />The Heart Cockle Clinocardium sp.<br />Shallow burrowers<br />Most bivalves are sedentary but some can escape by running away<br />
  14. 14. Phylum Mollusca Clams, Cockles, Mussels - Class Bivalvia<br />The swimming scallop Chlamys sp.<br />Some bivalves can swim too.<br />Some have sensory cells for light along the mantle<br />
  15. 15. Phylum MolluscaSquid and Octopus - Class Cephalopoda<br />The record breakers<br />The largest<br />The fastest<br />The smartest<br />Octopus sp.<br />
  16. 16. Phylum Mollusca Squid - Class Cephalopoda<br />The market squid<br />Loligo sp.<br />8 long arms and two tentacles<br />Species schools in large numbers in shallows to lay eggs<br />
  17. 17. Phylum Mollusca Squid - Class Cephalopoda<br />The market squid<br />Loligo sp.<br />Have corneas over<br /> their eyes<br />Live from 4 to 5 <br /> months as adults<br />During the day live at depths of 500m and return to surface at night to hunt<br />
  18. 18. Phylum Mollusca Squid - Class Cephalopoda<br />The market squid<br />Loligo sp.<br />They have <br />chromatophores<br />Cells that can expand or contract and are mediated by muscles and are under neural control<br />
  19. 19. Phylum Mollusca Octopus - Class Cephalopoda<br />The giant pacific octopus Octopus sp.<br />Have 8 arms but no tentacles<br />A cartilaginous skull<br />Have chromatophores<br />
  20. 20. Phylum Mollusca Octopus - Class Cephalopoda<br />The red octopus Octopus sp.<br />Not only can they change colour they can mimic as well<br />
  21. 21. Phylum Mollusca Octopus - Class Cephalopoda<br />The giant pacific octopus Octopus sp.<br />Reproduction<br />Separate sexes<br />Modified arm for sperm transfer<br />Male dies after mating<br />Female dies when her eggs hatch.<br />
  22. 22. Phylum Mollusca Octopus - Class Cephalopoda<br />Octopus are smart<br />
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