Extinction Of Steller's Sea Cow

The lecture and the article cover the decline in sea otters population in the recent few years. Two main theories arised to explain that rapid decline. Pollution is suggested as the main reason behind this decline by the author. However, the lecturer opposes that. He believes that Predation is the main cause.

Both the reading and lecture talk about the extinction of sea cows. The reading claims that there are three reasons about the extinction of sea cows. Howevere the lecture argues that no evidence proves those reasons that are correct. Thus, the lecture holds an opposite view of the reading.

The reading argues that the distinction of megafauna was because of three reasons.However,the professor in the lecture states that although the points in the lecture were true,but reexamination of the these points lead to a new conclusion.the professor opposes the three points made by the author in the reading about the extinction of the diprotodone.

First, the article claims that the sea cows may have been overheated by groups of native Siberian people. However, the professor refutes this point by saying that sea cow was a massive creature and couple of them will be enough to feed the Siberian population. Also, the Siberian population was not large, so they don’t have to hunt a lot of cows to feed themselves. As a result, they were not the cause that drop the cow’s population to the extinction point.

The article states that sea cows become extinct in 1768 and provides three theories about the main cause of the extinction. However, the professor explains that they don't know the main cause of the extinction of the sea cow and refutes each of the author's theories.

The article states the three theories that causes the Steller’s sea cow extinction, and provides three reasons of support. However, the professor explains that the causes of sea cow extinction is not clear, and the three theories does not cause Steller’s sea cow extinction, and refutes each of the author’s reasons.

III First I will discuss and introduce you to the reasons why sharks are endangered.

First, the reading passage suggests that the sea cows become extinct because of over hunted by groups. On the contrary, the professor casts doubt on it. She argues in the lecture that the sea cows’ extinction have not relationship with over hunted. This is because these groups did not hunt a lot of them. Obviously, the professor disproves its counterpart in reading.

First, the reading states that the sea cows may have been overhunted by groups of native Siberian people. The professor opposed this point by saying that sea cow is a very massive animal about 9 meter long and 10 tons weight. The professor pointed out that two sea cows can give enough amount of food for months for a Siberian people, especially that Siberian people is not that large, so they do not have to hunt a lot of sea cows. Therefore, the professor stated that the sea cows hunting

To begin with, the lecturer argues that sea cow was the massive creature that the Siberian's population didn't need much sea cows as their food. This challenges the argument in the reading that the native Siberian people overhunted the sea cow as their food supply so that made the sea cow was extinct.

Commercial whaling is a serious world issue that has always been difficult for those who are in support and those who are against it. Each group defends their side with convincing arguments. Morally, whaling is wrong, but do the reasons for whaling outweigh the reasons to cease the primitive hunts? By studying the effects of whaling,realizing how culture has changed over time, and taking note of the money that would be saved, it can clearly be seen that there is no longer a current need for whaling to continue. Efforts have been made to try to stop whaling, but with no help from any authoritative figure,nothing has been done to regulate the whaling. The famous sea shepherd, known for its strikes against whaling, can even be seen on

In the reading, the author presents 3 theories about the major cause of the extinction of sea cow which is a huge marine mammal lived on the coast of Siberia. However, finding all the explanations questionable and implausible, the lecturer repudiates them and presents some evidence to the contrary.

Countless amounts of great whales will be illegally caught and slaughtered for commercial sale and “scientific” research this year. In spite of a worldwide moratorium, put in place by the International Whaling Commission twenty four years ago banning the act of commercial whaling, three defiant countries continue to hunt whales illegally. If these countries hunt whales against the law and continue to get away with minimal consequence it may encourage other countries to resume their whaling operations. If stricter laws are not out in place the whale populations will be hunted to extinction and the greatest conservation accomplishment of the twentieth century will go down the drain.

Both the reading and the speaking passage are about the Steller's sea cow which is extinct. The author describes three factors as a result of this incident, whereas the lecturer casts doubts on the claim made in the article.

Extant marine mammals belonging to the sirenian order include the dugong (Dugong dugon), the West Indian manatee (Trichechus manatus), the Amazonian manatee (Trichechus inunguis), and the West African manatee (Trichechus senegalensis). Sirenians are protected internationally by the Specially Protected Areas and Wildlife (SPAW) protocol, the Memorandum of Understanding on the Conservation and Management of Dugongs, and CITES (LaCommare et al. 2012). All extant sirenians are listed under CITES Appendix I (Crerar et al. 2017). One member of the sirenian order, the Steller’s sea cow (Hydrodamalis gigas), went extinct in 1768 due to overexploitation by Russian fur hunters (Stejneger, 1887; Domning, 1978). The sale of unfossilized bone