Adriaan Kortlandt

Adriaan Kortlandt ( born January 25, 1918 in Rotterdam, † October 18, 2009 in Amsterdam) was a Dutch ethologist who researched mainly to cormorants and chimpanzees.

Life

Even as a schoolboy Kortlandt had often observed cormorants while, at the same time discovered with Nikolaas Tinbergen, the skip movement. He studied psychology and geography in Utrecht and received his doctorate in 1949 at the University of Amsterdam with a thesis about the breeding preparatory acts of the cormorant. He taught as an adjunct professor of animal psychology and ethology at the University of Amsterdam.

In the 1960s he watched chimpanzees. He took the view that the evolutionary higher development of the chimpanzee ( to walking upright and tool use ) was stopped when the man has pushed back him out of the steppe in the jungle.

Writings

• An overview of the behavior of the central European cormorant. In: Archives néerlandaises de zoology. Volume 4, 1940, pp. 401-442.
• Cosmologie the animals. In: Vakblad voor biologists. Volume 34, 1954, pp. 1-14.
• Aspects and prospects of the concept of instinct. In: Archives néerlandaises de zoology. Volume 11, 1955.
• How do chimpanzees use weapons When fighting leopards? . In: Yearbook of The American Philosophical Society. Volume 5, 1965, pp. 327-332.
• Hand use in wild chimpanzees. In: Bernhard Rensch (eds.): Hand use and understanding in monkeys and early humans. 1968, pp. 59-102.
• New perspectives on ape and human evolution. In 1972.
• Marginal habitats of chimpanzees. In: Journal of Human Evolution. Volume 12, 1983, pp. 231-278.