Sea urchin presentation feb 16
Transcript of Sea urchin presentation feb 16
Hale Kula ElementaryGrowing Sea Urchins
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.
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.
Possible Solution 2-Sea Urchins
• Sea urchins will eat invasive seaweed (Smothering Seaweed and Gorilla Ogo ) and help control its growth in the ocean.
Method 1-Growing Sea UrchinsFresh Water + Salt Water Powder
Water:- Mixture of freshwater and
instant ocean water mix.Sea urchin food:- Seaweed - Farm feed- NoriResults:- Many of the sea urchins in our
tanks did not survive, about 15-20 sea urchins were released in December 2012.
Students Taking Data
Method 2- Growing Sea UrchinsUsing 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.
Ocean Release of Sea UrchinsDecember 2012
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.