1) Tinbergen put each fish in a glass tube.

2) Tinbergen demonstrated that it was possible, simply by watching animals, to make a scientific study of them.

3) The unique feature of human adaptability, emphasized by Tinbergen, is the cultural transmission of information between generations.

4) Tinbergen suggested that the zigzag display results from the conflict felt by the male between attacking the female and fleeing from her.

5) This paper attempts to use the law of Tinbergen and network approach of political, management, economical and ethical.