We report here the effects of several neurobiological determinants on aggressive behaviour in the fruitfly Drosophila melanogaster. This study combines behavioural, transgenic, genetic and pharmacological techniques that are well established in the fruitfly, in the novel context of the neurobiology of aggression. We find that octopamine, dopamine and a region in the Drosophila brain called the ...

AIM Several behavioural correlates of self-injury, aggression and destructive behaviour have been identified in children and young adults with intellectual disabilities. This cross-sectional study aimed to further explore these correlates in very young children with developmental delay. METHODS Parents of 56 children (40 male) under the age of five years (mean age 2 years 10 months) completed...

These two subspecies of house mouse were found to differ in their social behaviour, the former being less aggressive than the latter. The paternal effect on aggression (observed repeatedly in laboratory mice) was not found. However, F2 generation mice were less aggressive than those from the F1 generation, and the maternal effect was also significant in a homogenous test set.

. 3 Conspecific groupings and aggression. Hornbills in the wild perform many bill maintenance behaviors such as cleaning food residue from.Abyssinian Ground Hornbills, 151. See also aggressive behavior behavioral disorders sexual.Rhinoceros Hornbill. Defensive Aggressive behavior: Their long bill is used for defense against enemies. Either as aggression, social interaction, pair bonding, or pla...

It is known that pigs raised in enriched environments express less aggressive behaviour. For this reason, a new method of cognitive environmental enrichment was experimented at the University of Veterinary Medicine Hannover, Germany. In the first phase, 78 suckling piglets were trained to learn the link between a sound given by an electronic feeder and a feed reward in the form of chocolate can...

Nestmate recognition in the queenless ponerine ant, Streblognathus aethiopicus, was evaluated with a behavioural bioassay. Ten pairs of nests were randomly chosen from an aggregation of 74 nests. While nestmates never showed aggression towards each other, the behaviour towards non-nestmates was either aggressive or non-aggressive, demonstrating the ability to recognize nestmates. Also, the nest...

There is no doubt, that the medical staff has often to face aggressive patients, their threats and event their violent physical attacks today. More frequently than ever they are faced with the necessity to think over and consider very carefully the way to defend against imminent or persistent attack on them. First, I would attempt to qualify patients' aggressive behaviour - from lesser acts, wh...

Animals often exhibit particular 'personalities', i.e. their behaviour is correlated across different situations. Recent studies suggest that this limitation of behavioural plasticity may be adaptive, since continuous adjustment of one's behaviour may be time-consuming and costly. In social insects, particularly aggressive workers might efficiently take over fighting in the contexts of both nes...

Gambling is acknowledged to have many negative effects on the individual. However, from a psychological perspective, aggression as an outcome of gambling has been overlooked. This paper investigates the dynamics of the relationship between aggression and slot machine gambling. A non-participation observation study observed a small group of aggressive individuals (n = 8; identified in a previous...