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Crustacean powerpoint

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Publicada em: Tecnologia, Saúde e medicina
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Crustacean powerpoint

  1. 1. CRUSTACEA
  2. 2. • Phylum Arthopoda• Subphylum Crustacea• 30,000 species• Mostly marine
  3. 3. Examples of CrustaceansCrabs
  4. 4. Examples of CrustaceansShrimp
  5. 5. Examples of CrustaceansLobster
  6. 6. Examples of CrustaceansBarnacles
  7. 7. Examples of CrustaceansCopepods – 70% of all Crustaceans
  8. 8. Examples of CrustaceansKrill – greatest biomass of any species on earth
  9. 9. Examples of CrustaceansIsopods
  10. 10. Examples of CrustaceansAmphipods
  11. 11. ANATOMY• Anatomy varies depending on type of crustacean• Body divided into two major parts: Cephalothorax – head and main body cavity Abdomen – muscular, segmented dorsal part of body• Usually 16 – 20 body segments• Carapace – shell covering cephalothorax
  12. 12. cephalo thorax ab do m encarapace
  13. 13. ANATOMY• Many specialized, jointed appendages: – Gills – usually underneath for breathing – Walking legs - pereopods – Swimming legs - pleopods – Feeding appendages • maxillipeds and mandibles - mouthparts • chela - claws – Sensing - antennae – Defense – Tail – telson and uropods
  14. 14. antennae eye shrimp anatomy telsonchela uropods gills pleopods pereopods
  15. 15. crab anatomy – dorsal view chela eye antenna carapace walking legsswimming legs abdomen
  16. 16. mandibles eyechela crab anatomy – ventral view abdomen
  17. 17. Crustacean Feeding• Methods vary:• Predators and scavengers – crabs and lobsters• Filter feeders – barnacles• Parasites – isopods (fish lice), whales barnacles
  18. 18. Crustacean Reproduction• Separate sexes• Males release sperm packetusing modified appendages• Females mate during molting –hold sperm packet untilfertilization• Females carry fertilized eggsunder abdomen until hatching
  19. 19. Crustacean Life Cycle• Meroplanktonic larvae
  20. 20. Other Facts• Largest – king crab – legspan of 12 feet• Heaviest – 48 pound lobster

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