“In Thames River, which is located in United Kingdom, Daisy Crabs are over-breeding. They affect the ecosystem of Thames River seriously. The warm river provides abundant of food for Daisy Crab and there are barely natural force can limit their population, so they keep on breeding in Thames and start occupying tributaries of the River Thames. Other species in River Thames, such as fish and microorganism, would reduce due to food lacking and prey on consumer. “
Eating the daisy crabs is suitable in this case because this method can reduce the number of Daisy Crab immediately. Besides, European do not eat Daisy Crab, but Chinese do, so they can export Daisy Crab to some Asian countries. Not only they can reduce the Daisy Crab population in river, but also bring the economic benefits.
In comparison with other methods, we found that eating is this best way to tackle the overpopulated Daisy Crabs. Firstly, compare with sterilization. Sterilization is not a proper method in this case because there are too many crabs. It is difficult to catch them all and have sterilization. Also, there is no research and development on this technology in the society.
Secondly, compare with hunting. It is not suitable because the economic principle is not in compliance. It is because the Daisy Crab can be sold to other Asian countries. Not only can bring business opportunities for these countries, but also meet the Asian demand for it. It is wasteful if we just hunt them.
Lastly, compare with translocation. As Daisy Crabs are the species that first found in China, if it transfers to other region, it would become a foreign species. This foreign species may preclude the survival of reintroduced native species. Therefore, translocation is not a suitable solution to deal with the problem in this case too. the number of Daisy Crab immediately. Besides, European do not eat Daisy Crab, but Chinese do, so they can export Daisy Crab to some Asian countries. Not only they can reduce the Daisy Crab population in river, but also bring the economic benefits.
