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.
On December 7, 1941, the Japanese launched an attack on the US Naval Fleet stationed at Pearl Harbor, in Hawaii. A list of the ships sunk during the attack include: U.S.S. Ar â¦ izona U.S.S. Oklahoma U.S.S. California (floated and rebuilt by January 1944) U.S.S.