Abstract The evolution of male-male aggression is interest because at its extreme it can be very energetically costly, leave males vulnerable to preadtors, and give rise weaponry such as exaggerated traits. In grasshoppers (Acrididae), one group stands out exceptionally aggressive, the skyhoppers ( Kosciuscola ) in which bite, kick, mandible flare, wrestle each other for access females or when ...

A stable herd of fattening cattle comprising 9 steers and a heifer, which had been kept together over a month in a dry-lot, was observed for 13 days (0600-1900 h) to determine the diurnal distribution of the frequency of social licking interactions and to examine the relationship between social licking and agonistic behaviour. Agonistic behaviour was also classified into total (fighting, buntin...

The incidence of media violence on aggressive behaviour among adolescents has become a serious physiological, emotional and psychological issue. This study investigated the influence of media violence on aggressive behaviour among adolescents in secondary Schools in Ogbomoso. Descriptive survey research design was adopted for this study. The target population for the study was made up of all se...

There is a lack of information based on clinical data to guide clinical judgement in identifying cases where aggressive canine behaviour could be related to pain. This study aimed to identify clinical themes in cases of aggressive behaviour by dogs in which a relevant painful focus was identified versus a control group with similar initial presenting problems, in which no medical complications ...

This study explores the social impact of ADHD, with and without opposition-defiant behaviour (ADHD+ODD (n= 22) and ADHD-only (n= 18)), in 9- to 12- year old girls compared to girls without ADHD (n= 40). Girls played a computer game involving simulated players, and mothers and teachers completed rating scales. In general, mothers and teachers saw girls with ADHD+ODD as more overtly and relationa...