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Acanthaster planci

Biological Classification. Domain:Kingdom:Phylum:Class:Order:Family:Genus:Species:. EukaryotaAnimaliaEchinodermataAsteroidea (sea stars)ValvatidaAcanthasteridaeAcanthaster (2 species)Acanthaster planci. Echinodermata. Characteristics:Bilateral symmetry as larvaePentaradial symmetry as adultsSpiny/bumpy endoskeletonWater vascular system Tube feet .

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Acanthaster planci

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    1. Acanthaster planci Crown-of-Thorns Starfish

    3. Echinodermata Characteristics: Bilateral symmetry as larvae Pentaradial symmetry as adults Spiny/bumpy endoskeleton Water vascular system Tube feet

    4. Asteroidea Characteristics: up to 50 arms tube feet protrude from the oral surface Multi-directional movement endoskeleton made up of calcium carbonate plates Pedicellariae

    5. Crown-of-Thorns 7-23 arms: usually 14-18 arms Elongate spines: on the aboral side, usually about 5cm long 7-23 arms: usually 14-18 arms Elongate spines: on the aboral side, usually about 5cm long

    6. Crown-of-Thorns 7-23 arms: usually 14-18 arms Elongate spines: on the aboral side, usually about 5cm long 7-23 arms: usually 14-18 arms Elongate spines: on the aboral side, usually about 5cm long

    7. Anatomy Madreporites : where the water is drawn in to fill and control the water vascular system which is esential for the locomotion of the sea star. A ring canal connected to the madreporite encircles the mouth and gives off 5 radial canals which run along the underside of each arm and end at the tip in the terminal sensory tentacles. The tube feet (podia) extend from the radial canals and each tubed foot has a round sac at the top called an ampulla. This ampulla contracts and forces the fluid within it down into the foot to extend it and small muscles determine which direction it will move it. Skin receptors and light sensors at the tip of each arm are connected to a sensory nerve net just beneath the epidermis and coordinate the movement of the body wall and its spines. At the tip of each foot a sticky mucus is excreted. This whole system for movement allows the starfish to move pretty slowly – at a maximum speed of about 20 metres an hour. Madreporites : where the water is drawn in to fill and control the water vascular system which is esential for the locomotion of the sea star. A ring canal connected to the madreporite encircles the mouth and gives off 5 radial canals which run along the underside of each arm and end at the tip in the terminal sensory tentacles. The tube feet (podia) extend from the radial canals and each tubed foot has a round sac at the top called an ampulla. This ampulla contracts and forces the fluid within it down into the foot to extend it and small muscles determine which direction it will move it. Skin receptors and light sensors at the tip of each arm are connected to a sensory nerve net just beneath the epidermis and coordinate the movement of the body wall and its spines. At the tip of each foot a sticky mucus is excreted. This whole system for movement allows the starfish to move pretty slowly – at a maximum speed of about 20 metres an hour.

    8. Distribution & Habitat Madreporites : where the water is drawn in to fill and control the water vascular system which is esential for the locomotion of the sea star. A ring canal connected to the madreporite encircles the mouth and gives off 5 radial canals which run along the underside of each arm and end at the tip in the terminal sensory tentacles. The tube feet (podia) extend from the radial canals and each tubed foot has a round sac at the top called an ampulla. This ampulla contracts and forces the fluid within it down into the foot to extend it and small muscles determine which direction it will move it. Skin receptors and light sensors at the tip of each arm are connected to a sensory nerve net just beneath the epidermis and coordinate the movement of the body wall and its spines. At the tip of each foot a sticky mucus is excreted. This whole system for movement allows the starfish to move pretty slowly – at a maximum speed of about 20 metres an hour. Madreporites : where the water is drawn in to fill and control the water vascular system which is esential for the locomotion of the sea star. A ring canal connected to the madreporite encircles the mouth and gives off 5 radial canals which run along the underside of each arm and end at the tip in the terminal sensory tentacles. The tube feet (podia) extend from the radial canals and each tubed foot has a round sac at the top called an ampulla. This ampulla contracts and forces the fluid within it down into the foot to extend it and small muscles determine which direction it will move it. Skin receptors and light sensors at the tip of each arm are connected to a sensory nerve net just beneath the epidermis and coordinate the movement of the body wall and its spines. At the tip of each foot a sticky mucus is excreted. This whole system for movement allows the starfish to move pretty slowly – at a maximum speed of about 20 metres an hour.

    9. Reproduction This is a cross-sectional view of an arm, You can see the podium and ampulla from another view. The radial canal This is a cross-sectional view of an arm, You can see the podium and ampulla from another view. The radial canal

    10. Regeneration This is a cross-sectional view of an arm, You can see the podium and ampulla from another view. The radial canal This is a cross-sectional view of an arm, You can see the podium and ampulla from another view. The radial canal

    11. Life Cycle This is a cross-sectional view of an arm, You can see the podium and ampulla from another view. The radial canal This is a cross-sectional view of an arm, You can see the podium and ampulla from another view. The radial canal

    12. Life Cycle This is a cross-sectional view of an arm, You can see the podium and ampulla from another view. The radial canal This is a cross-sectional view of an arm, You can see the podium and ampulla from another view. The radial canal

    13. Life Cycle This is a cross-sectional view of an arm, You can see the podium and ampulla from another view. The radial canal This is a cross-sectional view of an arm, You can see the podium and ampulla from another view. The radial canal

    14. Life Cycle This is a cross-sectional view of an arm, You can see the podium and ampulla from another view. The radial canal This is a cross-sectional view of an arm, You can see the podium and ampulla from another view. The radial canal

    15. Life Cycle This is a cross-sectional view of an arm, You can see the podium and ampulla from another view. The radial canal This is a cross-sectional view of an arm, You can see the podium and ampulla from another view. The radial canal

    16. Life Cycle This is a cross-sectional view of an arm, You can see the podium and ampulla from another view. The radial canal This is a cross-sectional view of an arm, You can see the podium and ampulla from another view. The radial canal

    19. The Great Barrier Reef This is a cross-sectional view of an arm, You can see the podium and ampulla from another view. The radial canal This is a cross-sectional view of an arm, You can see the podium and ampulla from another view. The radial canal

    20. The Great Barrier Reef This is a cross-sectional view of an arm, You can see the podium and ampulla from another view. The radial canal This is a cross-sectional view of an arm, You can see the podium and ampulla from another view. The radial canal

    21. World Heritage Criteria

    22. Outbreaks

    23. Effects of Outbreaks

    24. OUTBREAKS

    25. Monitoring

    26. Monitoring

    27. Effects of Outbreaks

    28. Causes of Outbreaks

    29. Current Policy

    30. Summary

    31. For more information and regular updates visit: www.gbrmpa.gov.au and look for “State of the Reef Report” updates

    32. Other Sources: www.reef.crc.org.au www.aims.gov.au

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