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Crown-of-thorn Starfish By: Amanda Barmore Acanthaster planci Phylum: Echinodermata Calcitic skeleton Water vascular system Mutable collagenous tissue Pentaradial body organization Class: Asteroidea True starfish Movement with tube feet Predators Distribution Crown of Thorn Starfish

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Crown-of-thorn Starfish

By: Amanda Barmore

acanthaster planci
Acanthaster planci
  • Phylum: Echinodermata
    • Calcitic skeleton
    • Water vascular system
    • Mutable collagenous tissue
    • Pentaradial body organization
  • Class: Asteroidea
    • True starfish
    • Movement with tube feet
    • Predators
crown of thorn starfish
Crown of Thorn Starfish

Appearance

- 25-35cm, max 80cm

- 12-19 arms

- multicolored

- GBR: reddish grey with red-tipped

spines

behavior
Behavior
  • Habitat
    • Coral Reefs
  • Movement
    • Tube feet
  • Feeding
    • Digestive enzymes
life cycle
Life Cycle
  • Fertilization
    • Embryo develops into

larvae; feeds on plankton

  • Planktonic stages
    • At the mercy of the ocean
    • Gastrula Bipinnaria  Brachiolaria
    • Primordium – sack like structure
life cycle7
Life Cycle
  • Settlement
    • Day 2: Juvenile starfish
    • Month 6: about 1 cm and feeding on coral
    • Year 2: 20 cm and sexually mature
    • Year 3-4: Senile, low growth and reproduction
outbreaks
Outbreaks
  • Natural Hypothesis
    • Agricultural runoff creating algal blooms
  • Man interference
    • Removal of starfish predators
outbreaks10
Outbreaks
  • Type
    • Primary
    • Secondary
  • Duration
    • 1- 4 Years
    • GBR 15 Years
the evil
The Evil
  • Reef Destruction
    • 5-6 km yearly
    • 86% of GBR
  • Humans
    • Poisonous spines
containment problems
Containment Problems
  • Gamete production
    • 65 million eggs
  • Larval size
    • Antibodies to track
  • Reef size
    • Needle in a hay stack
reef protectors
Reef Protectors
  • Red Spotted Trapeze Crab
  • Giant Triton
  • Hawaiian Lined Fireworm
  • Divers
divers
Divers
  • Cutting
    • Not practiced
  • Injections
    • Copper sulfate
  • Removing
    • Difficult
knowledge
Knowledge
  • Imprecise Science
    • 1960’s
  • Willingness
    • Attitude
  • Research
    • GBRMPA
references
References
  • Google Images
  • Crown of thorn starfish Q&A, http://www.aims.gov.au/pages/reflib/cot-starfish/pages/cot-000.html
  • www.gbrmpa.gov.au/.../sotr/latest_updates/cots
  • http://www.aims.gov.au/pages/reflib/cot-starfish/pages/cot-f15.html
  • http://en.wikipedia.org/wiki/Crown-of-thorns_starfish
  • Ecological Applications Textbook
  • http://www.divegallery.com/crownofthorns.htm
  • http://www.tellusconsultants.com/Thread/ACANTH.HTM