Instinctive behavior occurs when an animal has a particular internal state while it is in the presence of a specific external stimulation called a releaser or a sign stimulus.
How many ships did the U-boats sink? During the war the U-boats sank about 2,779 ships for a total of 14.1 million tons GRT. This figure is roughly 70% of all allied shipping losses in all theatres of the war and to all hostile action. The most successful year was 1942 when over 6 million tons of shipping were sunk in the Atlantic.
But on April 15, 1912, it hit an iceberg and sank in the icy waters of the North Atlantic, with the loss of 1,517 lives However, according to Mr Gardiner, 64, the ship that sank was not Titanic at all â it was Olympic, her sister ship, in what was planned as one of the worldâs greatest insurance frauds.