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.
47 Ships Sunk by Kamikaze Aircraft. by Bill Gordon. Sources differ regarding the number of ships sunk by kamikaze aircraft during World War II. Inoguchi (1958, 211-34) lists the names of 34 ships sunk by kamikaze attacks, and Warner (1982, 323-34) gives the names of 57 ships sunk by special attack aircraft. However, an examination of other historical records indicates that both of these two lists do not have the correct number of ships sunk by kamikaze.
Story highlights. 1  Two World War II shipwrecks lie two miles apart in the Gulf of Mexico. 2  One is a German U-boat that sank an American steamer. 3  Nazis sank about 50 American ships in the Gulf during the war.  Exploration Vessel Nautilus conducted dives in July to learn more about 1942 incident.