Eusociality

Eusociality (from Greek ευ 'good' and Latin socialis, matey ') is the name given to the behavior of state formation in the animal kingdom. It is particularly conspicuous in Hymenoptera, eg ants, bees, wasp and wasp rights, but is also used in other social insects such as termites and other arthropods as before the bang marine crabs of the genus Synalpheus. Clearly eusoziale mammals are the mole rats; the gray Mullen is awarded not unanimous eusociality.

For real eusociality four conditions must be met. These are

• Cooperative brood care by several animals
• Common food procurement and distribution
• Division of the Association in fertile and infertile animals
• Several generations living together

If only the first condition is met, it is called a quasi- social nature, is only the last is not fulfilled, it is a semi- social kind but the transitions can be smooth. Eusociality includes a strict hierarchy, which stipulates tasks such as mating, parental care, construction, defense against the enemy and, for specific groups.

Were detected approaches to eusociality also in parasitic trematodes living in mollusks, of which a part of the colony can reproduce, while other individuals defend the colony. These "soldiers" have only two percent of the body size of reproductive individuals.

Eusociality requires a high degree of altruism and is therefore enlightening to questions of population genetics.