Jakob Johann von Uexküll (Keblas, Estonia, September 8th 1864 - Capri, July 25th 1944) is a Biologiste and German Philosophe , one of the pioneers of the ethology before Konrad Lorenz.

It influenced beyond the biologists, until philosophy: Georges Canguilhem, the knowledge of the life (pp. 146-147), Gilles Deleuze ( Alphabetical the , “has like Animal”, Thousand Plates , pp. 67-68 and p. 314, Spinoza. Philosophy practices ), Jacques Lacan, Martin Heidegger in the fundamental concepts of Metaphysics , Peter Sloterdijk in Ecumes , but also lately Giorgio Agamben in the Open one/Of the man and the animal (chapter 11 and following).

The tick

Von Uexküll is in particular famous for its analysis of the life of the Tique. This one reacts only to three stimulants:

1. the fertilized female climbs on a branch, and awaits the passage of an animal; when the olfactive stimulus takes place (perception of butyric acid, odor of the glands sudoripares of the mammals), it is dropped; if it does not fall on an animal, it goes up on a branch;
2. a tactile stimulant enables him to go towards a site of the skin stripped of hairs;
3. it is inserted to the head in the skin of the animal, fills of blood, is dropped, laid its eggs and dies.

Though limited compared to ours, this world is a world with whole share.

Works

Animal worlds and human world , Denoël, 1984.

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