Genetic studies suggest epigenetic regulation of aggression in vertebrates [ 34- 38], and there are extensive aggression-related differences in brain gene expression between the aggressive AHB and the less-aggressive EHB [ 39].
They also have more severe clinical and behavioural profiles, including more extensive emotional regulation problems, aggression, impulsivity, cognitive rigidity, and neuroticism [ 16, 6, 45, 46].
It seems more likely that the observed effect was due to an increase in aversion to harming others, in line with extensive evidence that propranolol reduces aggression (Greendyke et al., 1984 , 1986 Silver et al., 1999; Yudofsky et al., 1981).
There is extensive evidence that alcohol and physical aggression are associated.
There is extensive evidence showing proactive and reactive aggression to be associated with different etiological, expressive and persisting markers (e.g., Arsenio et al. 2009; Card and Little 2006; Smithmyer et al. 2000).
The scale has four categories of aggressive behavior (verbal aggression, aggression against property, auto-aggression, and physical aggression) [ 57].
The Syrian army said the missile attack on its airbase killed six people and caused extensive damage, describing it as a "blatant aggression".
The vet team found that she had "experienced extensive trauma" and "significant complications resulting from the aggression", she died at 03 00 local time.
During the short annual mating season, males exhibited elevated levels of aggression towards mates, as well as extensive mate guarding and increased locomotor activity.
Male bluefin killifish, Lucania goodei, show extensive consistent behavioural variation in their levels of courtship, male-directed aggression and female-directed aggression, resulting in a range of fitness-related behavioural types coexisting within a population.
Worker aggression was considerably more overtly aggressive than queen aggression.
