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Hans Hass
Hans Hass (23 January 1919 – 16 June 2013) was an Austrian biologist and diving pioneer. He was known mainly for being among the first scientists to popularize coral reefs, stingrays and sharks. He pioneered the making of documentaries filmed underwater. He led development of the aqualung and of a type of rebreather. He is known, too, for his energon theory〔(【引用サイトリンク】author=Hass, Hans )〕 and his commitment to protecting the environment.
==Early years==
Hass was born in Vienna; his father was an attorney and Hass initially pursued law. However, Hass' had a formative encounter with the American diver Guy Gilpatric while on a Riviera vacation in 1938〔 which included underwater hunting and photography. After making expeditions to the Caribbean Sea 1938/39 and writing his first professional articles, in 1940 Hass switched from reading law to zoology studies and graduated with a Ph.D. from the University of Berlin in 1943 at the faculty of Biology. His thesis was the first scientific research using an autonomous rebreather diving equipment. In his early diving he used rebreathers which he had made for him by the German diving gear makers Dräger: he had these sets made with the breathing bag on his back, as he did not like the bag-on-chest "frogman look". Hass and his team of researchers logged over 2000 dives utilizing oxygen rebreathers from 1942 to 1953.
Don Stewart, one of the first scuba operators on the Caribbean island of Bonaire, blames Hass for single-handedly hunting the Atlantic goliath grouper to local extinction.〔Roberts, Callum. ''The Unnatural History of the Sea'', Island Press, 2007, p. 238〕
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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