Sea urchin presentation feb 16

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Sea urchin presentation feb 16

  1. 1. Hale Kula ElementaryGrowing Sea Urchins
  2. 2. Problem-Invasive Seaweed ( Smothering Seaweed and Gorilla Ogo )• Invasive algae (Smothering Seaweed (Kappaphycus / Eucheuma), and Gorilla Ogo (Gracilaria salicornia) has been growing in Kaneohe Bay for more than 30 years. Many reefs throughout the bay are highly affected by their spread.
  3. 3. Possible Solution 1- Super Sucker• Good tool to collect invasive algae from Kaneohe Bay.• Collects about 2-8 thousand pounds of limu per day.• Given to farmers for composting.• However, in 5-6 months algae returns.
  4. 4. Possible Solution 2-Sea Urchins • Sea urchins will eat invasive seaweed (Smothering Seaweed and Gorilla Ogo ) and help control its growth in the ocean.
  5. 5. Method 1-Growing Sea UrchinsFresh Water + Salt Water Powder Water: - Mixture of freshwater and instant ocean water mix. Sea urchin food: - Seaweed - Farm feed - Nori Results: - Many of the sea urchins in our tanks did not survive, about 15-20 sea urchins were released in December 2012.
  6. 6. Students Taking Data
  7. 7. Method 2- Growing Sea Urchins Using Salt Water Water: - Salt water was obtained from a faucet in Sand Island. Sea Urchin Food: - Only limu or ogo Results: - Higher percentage of survival rate for our sea urchin.
  8. 8. Ocean Release of Sea Urchins December 2012
  9. 9. Conclusions- Best way to grow Sea Urchins• Avoid touching sea urchins regularly.• Use ocean water to grow them in.• Clean water filter and scrub aquarium weekly.

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