Why the animals meet do in herds?
The question of knowing why the animals gather is one of most fundamental in Sociobiologie and behavioral ecology. As higher indicated, the term of “herd” is more generally employed for the herbivores such as ongulés, and in this case one estimates that the factor of selective pressure most extremely to lead to the constitution of herds rather than with a solitary existence is protection against the Prédateur S. It is clearly the result of an arbitration between contradictory factors, since on a side a predator can hesitate to tackle a great group of animals, and other a great group constitutes a target easier to detect. It is generally estimated that the most important factor of protection is the dilution of the risk – if a predator attacks the herd, the risk for each individual to be the victim about it is relatively reduced. In the case of the predatory ones, the term of “herd” is not suitable, because a group of hunting requires a certain level of coordination and differentiation o
