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Zooplankton. Objectives. Be able to define zooplankton Be familiar with the major groups of zooplankton and their characteristics Explain the benefits of zooplankton Explain how certain zooplankton can gauge reproductive success. Zooplankton.

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objectives
Objectives
  • Be able to define zooplankton
  • Be familiar with the major groups of zooplankton and their characteristics
  • Explain the benefits of zooplankton
  • Explain how certain zooplankton can gauge reproductive success
zooplankton1
Zooplankton
  • Zooplankton are the “animal-like” members of the plankton
  • Permanent and temporary planktonic forms
  • Most groups are multicellular and categorized by mouth parts and/or appendages
  • Most groups feed as heterotrophic consumers
  • Generally indicate a “healthy” ecosystem
major groups of zooplankton
Major Groups of Zooplankton
  • Protozoa
    • Ciliates, Amoebae
  • Rotifera
  • Copepods
  • Gelatinous Zooplankton
  • Invertebrate and Vertebrate Larvae
protozoa
Protozoa
  • Single cell organisms
  • Primarily feed on bacteria and phytoplankton
  • Capable of reproducing rapidly due to small size
  • Most species capable of forming cysts
  • Microzooflagellates, ciliates, amoebae
rotifera
Rotifera
  • Typically referred to as “Rotifers”
  • “sloppy feeders” on phytoplankton and other zooplankton
  • recycle nutrient via feeding and fecal pellets
  • parthenogenic eggs
copepods
Copepods
  • “Sloppy feeder” on phytoplankton and other zooplankton
  • Major source of food for larval fish
  • Recycles nutrients via feeding and fecal pellets
gelatinous zooplankton
Gelatinous Zooplankton
  • Commonly referred to as jellyfish
  • Most have stinging cells called cnidocytes but some are filter feeders
  • May be permanent of temporary members of the plankton
ctenophores
Ctenophores
  • Cteno means comb: sometimes called comb jellies
  • Gelatinous filter feeding organisms- no stinging cells
  • May be bioluminescent
  • Common in the Bay in the early Spring
cnidarians
Cnidarians
  • Stinging cells
  • Chrysaora quinequecirrha
  • Stinging and feeding tentacles
  • Male and female forms
  • “jelly” is the sexual stage of the life cycle and is called the medusa stage
larvae of invertebrate and vertebrate animals
Larvae of Invertebrate and Vertebrate Animals
  • Temporary members of the plankton
  • Invertebrates are animals without backbones: worms, oysters, crabs
  • Vertebrates are animals with backbones: fish
references
References
  • http://www.bayjournal.com/95-03/zooplank.htm
  • http://faculty.washington.edu/cemills
  • Many links to each group when typing group name