Search results for " Behaviour"

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…

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…

Female-female aggression and male polyterritoriality in the pied flycatcher

1994

Educational styles, peers’ approval and adolescent self-injurious behaviours

2010

The present research aims at understanding how the same body may became object of aggression and destruction by adolescents' self-injurious behaviours. Particularly, self-injurious behaviours are those finalised to destruction or deliberate alteration of one's body, even if without a conscious suicidal intention. The research aims at studying the relationship between educational styles, self-injurious behaviours and the social representation of the phenomenon in a group of adolescents aged between 15 and 19 years. Research has shown that on the basis of self-injurious behaviours there are the perception of an authoritarian educational style and approval by peers and brothers. (C) 2010 Elsev…

A brief review about anxiety and aggressive behavior in pediatric age

2018

Anxiety can be considered a normal experience of the human being and as such also of the child. It manifests itself in different ways according to the level of development: in the smaller the child, the more anxiety is expressed with manifestations that involve the whole organism, becoming evident either with motor excitement or with physical discomfort. As the psychic apparatus is structured, anxiety is experienced as an inner phenomenon and is experienced as an unpleasant state. Fortunately, we are all a bit anxious, even if there are some people who are more, others less.

Sexism in adolescence: parenting styles, division of housework, prosocial behaviour and aggressive behaviour /Sexismo en la adolescencia: estilos de …

2017

AbstractThe aim of this study was to identify which factors were the best predictors of sexist attitudes. To achieve this aim, two groups of variables were analysed. The first group consisted of variables relating to parenting styles and the division of housework. The second group consisted of personal factors related to prosocial behaviour and physical and verbal aggression. The sample was made up of 732 adolescents aged 12–14 from Valencia (Spain). The analysis was conducted separately for boys and girls. Correlation analyses and multiple linear regression analyses were conducted on each subsample. The results show that the division of housework and parenting styles were related to sexist…

Drivers’ Age, Gender, Driving Experience, and Aggressiveness as Predictors of Aggressive Driving Behaviour

2011

ABSTRACT Recent years have seen a growing interest in the problem of aggressive driving. In the present study two demographic variables (gender and age), two non-psychological driving-experience related variables (annual mileage and legal driving experience in years) and aggressiveness as a personality trait (including behavioural and affective components) as psychological variable of individual differences were examined as potential predictors of aggressive driving. The aim of the study was to find out the best predictors of aggressive driving behaviour. The study was based on an online survey, and 228 vehicle drivers in Latvia participated in it. The questionnaire included eight-item Aggr…

Age-dependent inbreeding risk and offspring fitness costs in female black grouse

2011

Dispersal is an important mechanism used to avoid inbreeding. However, dispersal may only be effective for part of an individual's lifespan since, post-dispersal individuals that breed over multiple reproductive events may risk mating with kin of the philopatric sex as they age. We tested this hypothesis in black grouse Tetrao tetrix , and show that yearling females never mated with close relatives whereas older females did. However, matings were not with direct kin suggesting that short-distance dispersal to sites containing kin and subsequent overlap of reproductive lifespans between males and females were causing this pattern. Chick mass was lower when kinship was high, suggesting impor…

Seasonal changes in host phenotype manipulation by an acanthocephalan: time to be transmitted?

2009

Parasitology, 136 (2)

Perinatal exposure to 5-methoxytryptamine, behavioural-stress reactivity and functional response of 5-HT1A receptors in the adolescent rat.

2008

Abstract Serotonin is involved in a wide range of physiological and patho-physiological mechanisms. In particular, 5-HT1A receptors are proposed to mediate stress-adaptation. The aim of this research was to investigate in adolescent rats: first, the consequences of perinatal exposure to 5-metoxytryptamine (5MT), a 5-HT1/5-HT2 serotonergic agonist, on behavioural-stress reactivity in elevated plus maze, open field and forced swim tests; secondly, whether the behavioural effects induced by perinatal exposure to 5MT on open field and forced swim tests were affected by the selective 5-HT1A receptor agonist LY 228729, a compound able to elicit a characteristic set of motor behaviours on these ex…