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Marine Ecology, April 7 & 9, 2008

Marine Ecology, April 7 & 9, 2008. Intertidal organisms Part A: Phylum Porifera, Phylum Cnidaria, and assorted worm phyla. Phylum Porifera. Basic sponge knowledge Water movement and feeding Focus on the choanocyte Protection in sponges Spicules Toxins Cryptic location Camouflage

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Marine Ecology, April 7 & 9, 2008

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  1. Marine Ecology, April 7 & 9, 2008 Intertidal organisms Part A: Phylum Porifera, Phylum Cnidaria, and assorted worm phyla

  2. Phylum Porifera • Basic sponge knowledge • Water movement and feeding • Focus on the choanocyte • Protection in sponges • Spicules • Toxins • Cryptic location • Camouflage • Regnerative ability

  3. Haliclona sp. Nudibranch: Many are predators of sponges

  4. Phylum Cnidaria • Polyps and medusae • Basic parts of both body forms

  5. Phylum Cnidaria • Alternation of generations • Note that anemones have no medusa form, but do have functional gonads within polyps

  6. Phylum Cnidaria • Cnidocytes/nematocysts

  7. Anthopleura xanthogrammica Anthopleura elegantissima Phylum Cnidaria, Class Anthozoa Local intertidal species

  8. Anthopleura artemesia Epiactis prolifera Phylum Cnidaria, Class Anthozoa Local intertidal species

  9. Phylum Platyhelminthes • Overall body organization

  10. Marine Platyhelminthes

  11. Phylum Nemertea

  12. Phylum Nematoda:The roundworms

  13. Phylum Annelida • Overall body organization

  14. Phylum Annelida, Class Polychaeta • Free-crawling predators Family Nereidae Family Glyceridae Photos: Morris et al.

  15. Phylum Annelida, Class Polychaeta • Free-crawling predators Family Nereidae: mouthparts

  16. Phylum Annelida, Class Polychaeta • Tube worms with tentacular crowns Family Sabellidae Photo: coralsphere.com Family Serpulidae Photo: Taata Divers

  17. Phylum Annelida, Class Polychaeta • Family Sabellidae

  18. Phylum Annelida, Class Polychaeta • Deposit feeders Family Terrebellidae

  19. Phylum Annelida, Class Polychaeta • Tube-dwelling, mucous-bag feeder (Chaetopterus) Photo: Erling Svensen Family Chaetopteridae

  20. Phylum Annelida, Class Polychaeta • Tube-dwelling, mucous-bag feeder (Chaetopterus) Photo: Erling Svensen

  21. Epitokes! • What are the key physical features of epitokes? • How/when are they formed? • Describe their behavior

  22. Trocophore larva Photo: NOAA

  23. Phylum Sipuncula Sketch from Invertebrate Zoology course; UC Santa Cruz, Professor Baldo Marinovic

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