tpo15

The reading claims that the cane toad which was deliberately introduced to Australia to protect farmers'crops but the toad multiplied rapidly, and a large cane toad population now threatens small native animals that are not pests. It provides three measures that have been proposed to stop the spread of the cane toad. However, the professor states that it is not easy to get ride from toad population and the measures would be unsuccessful or damage the environment.

First, the article avers that one way to prevent the spread of the toad population would be to build a national fence that blocks the advance of the toad from moving into other parts. In contrast, the professor opposes this point by saying that the fence would not stop the sprading of the toad because young toad and its eggs would be in the rivers and streams. In fact, the river is flowing from side to other side so they will be carry by the river to the other side of Australia. In addition, it is easy to pass through the fence so the fence is unsuccessful.

Second, the passage asserts that the toads could be captured and destroyed by volunteers. On the other hand, the lecturer counters this point by stating that it could be successful to capture the toads but untrained volunteers would destroy the native frogs in the area which are endangered. Actually, it is not easy since toads are spreading in wide area, especially, the young one.

Third, the article posits that reserchers are developing a disease causing virus to control the cane toad population. Conversely, the professor casts doubt on this point by explaining that this way is terrible. he mentions that virus would cause harm for other animals such reptile and amphibian species, and if this virus transfer to the america where the native toads live, it would be a problem there since the toads are part of ecosystem so whole ecosystem will suffer.