The European green shore crab lives and thrives in Europe. The crab eats a variety of foods, including fish, algae, and seaweed. It competes with natives for food. It also engages in cannibalism (the name in Latin means ravaging mad crab). Bays and estuaries, especially the San Francisco Bay, are home to green shore crabs. Although you might not realize it, the Green Crab is a significant problem throughout the SF estuary and coast. First off, green crabs have a daily consumption limit of 40 soft clams, which lowers the clam population. The Green Crab has a long time to eat as soft clams only spawn twice a year
Where do they normally occur?
Normally, you might find green crabs in the Atlantic Ocean from England to Africa. One reason they are in the San Francisco Bay is ballast water. Every day, boats discharge ballast water, which occasionally contains baby crabs, zoea, and megalopa. When the ship dumps the water somewhere else, the little crabs will swim out. Many individuals also keep crabs as pets. People release these crabs into the nearby ocean since it is not feasible to collect them. There, they procreate, and the population skyrockets.
What can we do?
What is my invention?
My invention may be a little complex, but may not wipe out the population of these little crabs. A net I created online sifts through the ocean to cut down the number of green shore crabs. We fasten this 10-by-5-foot net to a boat that will pass through estuaries. Since the diameter of each hole is 1 inch, native crabs cannot enter. A crab that crawls into a hole (and tries to devour a robot fish) will fall into a smaller net with holes that are 0.01 inches in diameter. The female crabs will then be cooked once the fisherman draws up the net. The population of crabs in the water will decline because they are unable to breed.
What supplies?
I might need a boat, scissors, and some net or screen to construct a prototype. I can construct an RC boat using a fan, engine, and batteries. We can make an rc boat by using a recycled bottle, and a wave maker or powerhead. This is run by solar batteries.
Would you invest?
Please visit https://scratch.mit.edu/projects/748812662/ to see this cool simulation I made.
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