The 1984 whaling ban begins to bite. The noise of fishing vessels is a new threat to whales.
Merten giants, or several different species of whales, were in danger of extinction in the 20th century. One sign of danger was that whales or flocks of whales were hardly found in the Arctic Ocean.
Whaling drastically reduced whale numbers in the Arctic and Southern Arctic as early as the early 20th century.
In the cold waters surrounding Antarctica, for example, more than 1.3 million whales were killed in the 19th and 20th centuries. Stocks declined until the 1980s.
Commercial swearing was banned by an international agreement in 1984, almost 40 years ago. The whales were then allowed to request only for research. The closure did not apply to indigenous peoples.
Many countries have slipped from the ban, citing “investigations,” most notably Japan and Norway. However, there are now signs that the ban on fishing is biting.
The populations of many whale species are recovering, says a whale researcher Lauren McWhinnie The Conversation online magazine. He is an Assistant Professor of Marine Science at Heriot-Watt University in Scotland.
The largest whales, or blue whales, for example, have been seen more and more in the waters around Antarctica, such as near the island of South Georgia.
It and the Southern Sandwich Islands are located more than 2,500 kilometers east of the southern parts of South America. The islands are also roughly still far from Antarctica and its Antarctic Peninsula.
The islands belong Of the United Kingdom areas. Many of the area are perhaps more familiar with the Falkland Islands. The so-called Falkland War was fought on the islands in 1982 between Argentina and Britain.
Nine over the past year, scientists have landed at least 41 new individuals from the waters of these islands.
In the early 20th century, about 3,000 blue whales were killed each year in the seas of South Georgia.
Whales flocked and flock to the area as there are large flocks of krill in the waters of the islands. Krill or luxury crab is the main food for blue whales. Krill live by eating marine phytoplankton.
The blue whale swims with the mouth of the flock open and can rub hundreds of pounds of krill at once. It is estimated that blue whales can eat four tons of krill a day.
Humpback whales have also been seen in the seas of the Antarctic Peninsula more than before, writes McWhinnie.
In the north in the Arctic Ocean, on the other hand, the number of Greenland whales is increasing. They occur almost as many as before the ban on commercial whaling.
The bay whale, on the other hand, has been seen in the Chukchi Sea north of the Bering Strait, near Alaska. From here says the Royal Society’s journal Biology Letters.
There is still much to be desired. However, sturgeon stocks in the southern seas and gray whale stocks in Russian Arctic waters have not grown as desired, McWhinnie writes.
Polar regions The seas are ocean giants a good region to raise offspring. The areas are still relatively untouched. There is also enough food in the Arctic Ocean.
However, the climate is also warming in the Arctic Ocean. Fishing has increased as ice-free areas are becoming larger in summer. Ship traffic increases underwater noise. Scientists know it interferes with whale navigation.
Whale scientists would like speed limits for ships in the Arctic Ocean. The speed could be controlled, for example, by hydrophones, which are underwater microphones.