Herd Instinct and Cowardice Help Fish to Survive

21.09.2016

Australian scientists from the School of Biological Sciences came to the conclusion that fish gather in shoals because of the common fear. The object of the study was three-spined stickleback - a small fish that lives in rivers, lakes and sea coasts of Europe, the Far East and North America. Its length is 12 cm, and weight is just 4 grams. And if danger threatens to all at once, all the personal courage and fearlessness of these fish are forgotten in favor of herd instinct.

Herd Instinct and Cowardice Help Fish to Survive

Study leader Dr Christos Ioannou says that, like the human community, a group of fish is managed by the most courageous individual. These fish were tested separately from the pack, and they perfectly showed their bright personality. But when, for example, a predator begins to threaten the school of fish even such brave individual tucks the tail and gives the power of the collective mind. A study of Australian scientists as well as possible confirm the harsh law of nature – it's easier to survive in the team.