Search results for "aggressio"

Effects of acute administration of nicotine and lobeline on agonistic encounters in male mice

2000

The effects of acute administration of two nicotinic ligands, (-)-nicotine and (-)-lobeline were examined on isolation-induced aggression in mice. Individually housed male mice confronted anosmic “standard opponents” in a neutral arena 10 min after drug administration. Encounters were videotaped and evaluated using an ethologically based analysis facilitating estimation of time allocated to 11 broad behavioral categories. Nicotine did not have significant effects on threat or attack but significantly diminished time allocated to digging. The lowest dose of lobeline significantly diminished attack and induced a slight increase of immobility without significantly diminishing other behaviors w…

Differential Response of Ant Colonies to Intruders: Attack Strategies Correlate With Potential Threat

2011

Animals are often threatened by predators, parasites, or competitors, and attacks against these enemies are a common response, which can help to remove the danger. The costs of defense are complex and involve the risk of injury, the loss of energy ⁄time, and the erroneous identification of a friend as a foe. Our goal was to study the specificity of defense strategies. We analyzed the aggressive responses of ant colonies by confronting them with workers of an unfamiliar congeneric species, a non-nestmate conspecific, a co-occurring congeneric competitor species, and a social parasite—a slave-making ant. As expected, the latter species, which can inflict dramatic fitness losses to the colony,…

The effect of scents on the territorial and aggressive behaviour of laboratory rats

1992

The majority of works found in the literature mention odours as an important factor in the development of social lines and the unleashing of aggressive behaviour, but very few authors have studied more deeply the role that these odours play, how they influence behaviour and what importance the variations of these marks of identity may have. In the present work we analyse social relations presented by laboratory rats (Rattus norvegicus, Wistar breed) in seminatural conditions, with special reference to behaviours of dominance, territorialism and aggressiveness, and the importance that these marks of odour play on these behaviours. For this purpose, different individuals (from the established…

Clinical and Biochemical Correlations of Aggression in Young Patients with Mental Disorders

2018

Hyperdopaminergia has been identified at impulsive or psychotic patients, the polymorphism of COMT or other enzymes that metabolize dopamine could be involved. The deficiencies of the serotoninergic system in suicidal behaviour has been mentioned by many studies that indicate the reduction of 5-HT, 5-HIAA in CSF or 5-HTT polymorphism. Young patients with psychotic or depression symptoms manifest, frequently, aggressive and self-harm behaviour. Besides the association between the young age and the aggressivity of the patients with serious mental disorders, our study shows gender differences and this matter is sustained by hormonal factors. The study was conducted at the Gheorghe Preda Psych…

Influence of Some Psychosocial Factors on Mobbing and its Consequences Among Employees Working with People with Intellectual Disabilities

2012

Background The problem of mobbing has attracted a great deal of attention over the past few years. This concern has increased the study of the phenomena, which has resulted in many scientific publications. Mobbing has been characterized as an emerging risk at work. The aim of this study was to analyse the influence of some psychosocial factors at work ‐ role clarity, interpersonal conflicts and social support ‐ on mobbing and its consequences ‐ that is, inclination towards absenteeism and psychosomatic disorders. Materials and methods The sample included 422 employees working with people with intellectual disabilities. Structural equation modelling (SEM) was used to test the hypotheses. Res…

Aggression and Peer Violence Manifestation in Youth Sport – The Case Study

2020

This study was designed to detect aggression and peer violence manifestation forms in youth sports in Subotica. The sample consisted of athletes (N=255), aged between 11 and 18 years. Besides presenting descriptive statistics, the Mann-Whitney U test was used to assess the differences in variables (gender, school age, training years, sport type) among the forms of violence that can occur and among the ones that do occur. The results indicate the presence of aggression and violence. The most frequent place is in the dressing room, and the more common period is after or during training and while traveling to competitions, sports camps, etc. The study indicates significant differences in sexua…

Aggression towards Referees in Amateur Football in Spain: A Loglinear Approach

2019

Aggressive behavior towards football referees is becoming increasingly common, and as a result we are getting used to it and coming to see it as an inevitable and intrinsic element of football matches. Spectators, players and coaches are all prone to take this view. This article studies how the types of aggression shown by these three groups towards the referee are related to one another, and how they are perceived by the referee, in amateur football. For this purpose, the phenomenon was assessed, using an ad-hoc form, both by an expert and by the referee, in 119 regional and youth football matches in the city of Valencia and surrounding municipalities. We analysed the data using a loglinea…

Psicología de la violación

1989

This paper reviews the psychological literature on rape. The first part focuses on the rapist, stressing the aggressive nature of rape and the necessity to overcome the typological approach. The second part studies the victim, underlying the impact of the aggression suffered and the difficult circumstances that follow the victim's report to police. It concludes by stressing the social side of rape and some preventive measures are suggested.

Female-female aggression and male polyterritoriality in the pied flycatcher

1994

EFFECTS OF TEACHER-STUDENT RELATIONSHIPS ON PEER HARASSMENT: A MULTILEVEL STUDY

2015

Peer harassment is a major social problem affecting children and adolescents internationally. Much research has focused on student-to-student harassment from either an individual or a multilevel perspective. There is a paucity of multilevel research on students’ relationships with the classroom teacher. The purpose of this study was to use a socioecological perspective to examine the relationships between individual student-level characteristics, problematic teacher–student relationships, and student-reported peer harassment. A total of 1,864 children (50.7% female) aged 8 to 13 years (M = 9.82, SD = 1.24), nested in 27 schools (58.2% public) in Spain, participated in the study. Ninety-four…