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Savaging; overt aggression directed to newborn offspring by a mother animal, often including cannibalistic infanticide. [28] Self-cannibalism (autophagy, autosarcophagy); an animal eating itself. [29] [30] Self-injury; an animal injuring its own body tissues. [31] Sham or "vacuum" dustbathing; dustbathing in the absence of appropriate substrate ...
In particular, the serotonin 5-HT seems to be an influence in inter-male aggression either directly or through other molecules that use the 5-HT pathway. 5-HT normally dampens aggression in animals and humans. Mice missing specific genes for 5-HT were observed to be more aggressive than normal mice and were more rapid and violent in their ...
Aggressionism is a philosophical theory that the only real cause of war is human aggression, which refers to the "general tendency to attack members of one's species." [1] It is argued that aggression is a natural response to defend vital interests such as territory, family, or identity if threatened. [1]
A fish from the respective genus Rivulus. The winner and loser effect is an aggression phenomenon in which the winner effect is the increased probability that an animal will win future aggressive interactions after experiencing previous wins, while the loser effect is the increased probability that an animal will lose future aggressive interactions after experiencing previous losses. [1]
Inclusive fitness theory, first proposed by W. D. Hamilton in the early 1960s, gives a selection criterion for evolution of social traits when social behavior is costly to an individual organism's survival and reproduction. The criterion is that the reproductive benefit to relatives who carry the social trait, multiplied by their relatedness ...
Agonistic behaviour is a result of evolution, [5] and this can be studied in a number of species facing different environmental pressures. Though agonistic behaviours can be directly observed and studied in a laboratory setting, it is also important to understand these behaviours in a natural setting to fully comprehend how they have evolved and therefore differ under different selective ...
The selfish herd theory was proposed by W.D. Hamilton to explain why animals seek central positions in a group. [43] The theory's central idea is to reduce the individual's domain of danger. A domain of danger is the area within the group in which the individual is more likely to be attacked by a predator.
Their work, Frustration and Aggression (1939), was soon having repercussions on the explanation of aggressive behavior theories. [14] Their theory applied to human beings, but also to animals. The book created controversy on the subject which led to more than seven articles critiquing the new theory.