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Lionfishprogrampresentation 12547992334167-phpapp01
Lionfishprogrampresentation 12547992334167-phpapp01
Lionfishprogrampresentation 12547992334167-phpapp01
Lionfishprogrampresentation 12547992334167-phpapp01
Lionfishprogrampresentation 12547992334167-phpapp01
Lionfishprogrampresentation 12547992334167-phpapp01
Lionfishprogrampresentation 12547992334167-phpapp01
Lionfishprogrampresentation 12547992334167-phpapp01
Lionfishprogrampresentation 12547992334167-phpapp01
Lionfishprogrampresentation 12547992334167-phpapp01
Lionfishprogrampresentation 12547992334167-phpapp01
Lionfishprogrampresentation 12547992334167-phpapp01
Lionfishprogrampresentation 12547992334167-phpapp01
Lionfishprogrampresentation 12547992334167-phpapp01
Lionfishprogrampresentation 12547992334167-phpapp01
Lionfishprogrampresentation 12547992334167-phpapp01
Lionfishprogrampresentation 12547992334167-phpapp01
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Lionfishprogrampresentation 12547992334167-phpapp01

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Transcript

  • 1. Lionfish as an invasive species Roatan Marine Park is working in coordination with NOAA, USGS, the Nature Conservancy and REEF organization in order to control the Lionfish invasion in Honduras
  • 2. Lionfish and the Roatan Marine Park
    • What are Lionfish?
    • Where did they come from?
    • Why are they a problem?
    • What can we do about it?
  • 3. What are Lionfish?
    • Anatomy
      • Venomous dorsal
      • ventral and anal spines
      • Resistant to parasites
  • 4. Lionfish Identification
  • 5. Lionfish Habitat
    • Lionfish are primarily associated with coral reefs , but can be found in warm marine waters of the tropics. Lionfish have been found in water depths from 85 to 260 feet on hard bottom, coral reefs and artificial substrate (like sunken ships). They tend to glide along the rocks or coral during the night and hide under ledges or in crevices during the day.
  • 6. Lionfish Behavior
    • Lionfish are thought to be nocturnal hunters, but they have been found with full stomachs during the day in the Atlantic.
    • They move about by slowly undulating the soft rays of the dorsal and anal fins .
    • During the day, they often retreat to ledges and crevices among the rocks and corals. Although in the Atlantic, lionfish are often seen moving about during the day, both alone and in groups of 2-6.
    • They may live alone for the majority of their lives, and will fiercely defend their home ranges from other lionfish and other species of fish.
    • However, they may live in small groups when they are juveniles and during the spawning season. Male lionfish are more aggressive than females, especially during the mating season.
    • Males will aggressively attack other males who attempt to invade their territory.
  • 7. Lionfish
    • Behaviour
        • Will binge eat until supply of fish has run out
        • Stomach can expand to 30 times its regular size
        • One study showed a Lionfish eat 20 fish in 30 minutes
        • Can survive for 12 weeks with no food
    • Breeding
        • Female release 2 egg sacks which males fertilize
        • 30,000 eggs are produced at a time
        • In the Caribbean females can reproduce every 30 days
        • Lionfish larvae will drift just below the surface for 25-40 days before settling on the reef
        • Indo-pacific Lionfish breed once a year, the Caribbean Lionfish breed several time a year
  • 8. Where did they come from?
    • 2003
  • 9. Their movement
  • 10. An updated map
  • 11. Lionfish Video
    • http://www.youtube.com/watch?v=LNbKjiUCGRU
  • 12. Why are they a problem?
    • Eating habits
        • Voracious predators
        • Juvenile Nassau Grouper have been found in Lionfish stomachs
        • Do not discriminate
        • Will eat fish and crustaceans including juvenile lobster, grouper, parrotfish.
  • 13. Why are they a problem?
    • No natural predators in the Caribbean
    • Bahamas
        • 1 st sighting in 2004
        • 2005, 16 more sightings
        • Now 390 per hectare
    • A study in 2008 showed that Lionfish were responsible for reducing the population of juvenile fish on a reef by 79%
  • 14. Lionfish sighting frequency over time done surveys in two regions of the tropical Atlantic , by REEF Organization
  • 15. Lionfish sighting frequency done by REEF Organization, fish surveys at New Providence, Bahamas
  • 16. A picture taken in the Bahamas after the invasion
  • 17. What can we do about it?
    • Eradication is impossible
    • Keep dive sites as free of Lionfish as possible to provide a safe haven for other fish
    • We need to be the main predator
    • Education
    • EAT THEM!!
    • What are other countries doing about it?

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