scholarly journals Size-selective harvesting and individual personality in a social fish

2019 ◽  
Author(s):  
Valerio Sbragaglia ◽  
Josep Alós ◽  
Kim Fromm ◽  
Christopher T. Monk ◽  
Carlos Díaz-Gil ◽  
...  
Keyword(s):  
Personality Traits ◽  
Risk Taking ◽  
Fishing Mortality ◽  
Behavioral Differences ◽  
Behavioral Traits ◽  
Selective Harvesting ◽  
Individual Personality ◽  
Selective Harvest ◽  
The Mean ◽  
Induced Changes

In fisheries worldwide, larger fish are subjected to substantially greater fishing mortality than smaller fish. Body length and behavioral traits are often correlated, such that fisheries-induced changes in either behaviour or morphology can also alter other traits as result of direct or indirect selection. Consistent behavioral differences among individuals, known as personality traits, provide the proximate framework by which selection can act; however, empirical evidence regarding how size-selective harvesting alters mean personality traits in exploited stocks is scarce. We examined three experimental lines of zebrafish (Danio rerio) that were exposed to positive, negative or random size-selective harvest over five generations to investigate whether simulated fishing changed the mean personality of the survivors five generations after harvesting was halted. We found that females mean boldness (defined as risk-taking tendency), activity and sociability were significantly altered relative to a randomly harvested line; however, harvest-induced changes in personality were only detected in the negatively size-selected line, in which 75% of the smallest fishes were harvested. By contrast, we did not find evidence for harvest-induced evolution of personality in the positively size-selected line, in which 75% of the largest fishes were harvested. We conclude that size-selective harvesting alters individual fish personality in a social fish.

scholarly journals INDIVIDUAL PSYCHOLOGICAL FEATURES OF THE LEVELS OF HARDINESS OF THE INDIVIDUALITY

2020 ◽  
Author(s):  
Kyrylenko T. S. ◽  
Chanchykov I. K.
Keyword(s):  
Personality Traits ◽  
Risk Taking ◽  
Character Traits ◽  
General Level ◽  
Individual Personality ◽  
Mental Properties ◽  
The Individual ◽  
Psychological Features ◽  
Inclusion Control ◽  
Positive Character

The article is devoted to the study of hardiness as a systemic concept and to expand the understanding of the features of individual manifestations of personality vitality. The concept of hardiness, developed by S. Muddy, includes three parameters: inclusion, control, risk-taking. In our study, individual manifestations of the vitality of the individual were identified by the characteristics of willpower, temperament, character traits, emotional sphere and self-esteem. The study is based on the concept of personality as an integral individual V.S. Merlin. In concept personality has certain levels: individual properties, individual mental properties, personal properties and the general level of integral individuality. According to these levels, individual personality traits were selected to determine the manifestations of hardiness. On the basis of cluster and analysis of variance, three levels of vitality are distinguished and individual personality traits are found accordingly. The obtained data allowed to describe the individual features of hardiness personalities: type of temperament, willpower, features of the emotional sphere, self-attitude and the most developed positive character traits.

Extraversion and Dopamine

1998 ◽  
Vol 3 (1) ◽  
pp. 37-50 ◽  
Author(s):  
Thomas H. Rammsayer
Keyword(s):  
Individual Differences ◽  
D2 Receptor ◽  
D2 Receptors ◽  
Behavioral Differences ◽  
Biological Mechanisms ◽  
Brain Dopamine ◽  
Personality Dimension ◽  
Time Performance ◽  
Reaction Time Performance ◽  
Induced Changes

Recent research suggests that individual differences in brain dopamine (DA) functioning may be related to the personality dimension of extraversion. The present study was designed to further elucidate the biological mechanisms underlying behavioral differences between extraverts and introverts. For this purpose, the differential effects of a pharmacologically induced blockade of mesolimbocortical DA D2 receptors on reaction-time performance were investigated in 24 introverted and 24 extraverted subjects. Introverts were found to be much more susceptible to pharmacologically induced changes in D2 receptor activity than extraverts. This finding provides additional experimental evidence for the notion that individual differences in D2 receptor responsivity may represent a neurobiological substratum for the personality dimension of extraversion.

scholarly journals Socially prescribed perfectioism and personality

2016 ◽  
Vol 6 (2) ◽  
pp. 107-118
Author(s):  
María Vicent ◽  
Cándido J. Inglés ◽  
Carolina Gonzálvez ◽  
Ricardo Sanmartín ◽  
José Manuel García-Fernández
Keyword(s):  
Personality Traits ◽  
Big Five ◽  
Statistical Significance ◽  
Effect Sizes ◽  
Big Five Personality ◽  
Primary School Students ◽  
School Students ◽  
Socially Prescribed Perfectionism ◽  
The Mean ◽  
The Relationship

The aim of this study was to examine the relationship between Socially Prescribed Perfectionism (SPP) and the Big Five personality traits in a sample of 804 Primary School students between 8 and 11 years old (M=9.57; SD=1.12). The SPP subscale of the Child and Adolescent Perfectionism Scale (CAPS) and the Big Five Questionnaire for Children (BFQ-N), which evaluate the traits of Neuroticism, Extraversion, Openness, Agreeableness, and Conscientiousness, were used. The mean difference analysis showed that students with high levels of SPP scored significantly higher on Conscientiousness, Agreeableness, Extraversion and Openness, with small effect sizes for all cases. In contrast, no significant differences were observed in Neuroticism. Logistic regression analysis revealed that all personality traits, except neuroticism, whose results didn’t reach the statistical significance, significantly and positively predicted higher scores on PSP, with OR levels ranging from 1.01 (for Conscientiousness and Agreeableness) to 1.03 (for Openness and Extraversion).

Predicting Homesickness in Residential Athletes

2015 ◽  
Vol 9 (2) ◽  
pp. 138-155 ◽  
Author(s):  
Brendan Smith ◽  
Stephanie Hanrahan ◽  
Ruth Anderson ◽  
Lyndel Abbott
Keyword(s):  
Personality Traits ◽  
Personal Growth ◽  
Coping Styles ◽  
Well Being ◽  
Self Esteem ◽  
Leaving Home ◽  
Developmental Milestone ◽  
Australian Institute ◽  
Individual Personality ◽  
And Coping

Leaving home or transitioning to another environment is a part of every individual’s personal growth and is often considered to be a significant developmental milestone. The distress that individuals experience with this transition has been identified as homesickness. Elite sporting institutions, such as the Australian Institute of Sport (AIS), have recognized that problems associated with homesickness appear to be a predominant cause of poor well-being and dropout among athletes living in a national sports institute. This study aimed to investigate if individual personality traits and coping styles could predict levels of homesickness in these athletes. Neuroticism, self-esteem, and mental escape were significant predictors of homesickness. These results suggest that athletes who are vulnerable to homesickness can be identified before the commencement of their sporting scholarships so they can be treated accordingly.

Agreeableness and neuroticism predict being more concerned about COVID-19 and bothered by friends’ risky behavior

2021 ◽  
Author(s):  
Jessica Daphne Ayers ◽  
Diego Guevara Beltran ◽  
Andrew Van Horn ◽  
Lee Cronk ◽  
Hector Hurmuz-Sklias ◽  
...  
Keyword(s):  
Public Health ◽  
Personality Traits ◽  
Risk Taking ◽  
Risky Behavior ◽  
Risky Behaviors ◽  
Reduce Risk

Given the importance of friendships during challenging times and the mixed associations reported between personality traits and disease-related behaviors, we investigated the influence of personality traits on friendships during the COVID-19 pandemic and how both influenced risky behaviors. In November 2020, we asked participants about their reactions to friends’ behavior as part of a larger study. We found that agreeableness and neuroticism predicted participants being more concerned about COVID-19 and bothered by friends’ risky behavior, and extraversion predicted enjoying helping friends during the pandemic. Our results suggest that personality influences how individuals cope with their friends’ risky behaviors. This work could be relevant for developing interventions to reduce risk taking during the pandemic, such as using friendships to reinforce adherence to public health guidelines.

scholarly journals Personality development from 12 to 18 years of age: changes in mean levels and structure of traits

2004 ◽  
Vol 18 (6) ◽  
pp. 445-462 ◽  
Author(s):  
Jüri Allik ◽  
Kaia Laidra ◽  
Anu Realo ◽  
Helle Pullmann
Keyword(s):  
Personality Traits ◽  
Personality Development ◽  
The Self ◽  
Age Changes ◽  
Cross Sectional ◽  
Adult Personality ◽  
12Th Grade ◽  
Self Reports ◽  
Change In The Mean ◽  
The Mean

The Estonian NEO‐FFI was administered to 2650 Estonian adolescents (1420 girls and 1230 boys) aged from 12 to 18 years and attending 6th, 8th, 10th, or 12th grade at secondary schools all over Estonia. Although the mean levels of personality traits of Estonian adolescents were quite similar to the respective scores of Estonian adults, there was a developmental gap in Agreeableness and Conscientiousness. Three of the five personality dispositions demonstrated a modest cross‐sectional change in the mean level of the trait scores: the level of Openness increased and the levels of Agreeableness and Conscientiousness decreased between 12 and 18 years of age. Although the five‐factor structure of personality was already recognizable in the sample of 12‐year‐old children, it demonstrated only an approximate congruence with the adult structure, suggesting that not all children of that age have developed abilities required for observing one's own personality dispositions and for giving reliable self‐reports on the basis of these observations. The self‐reported personality trait structure matures and becomes sufficiently differentiated around age 14–15 and grows to be practically indistinguishable from adult personality by the age of 16. Personality of adolescents becomes more differentiated with age: along with the growth of mental capacities the correlations among the personality traits and intelligence become smaller. Copyright © 2004 John Wiley & Sons, Ltd.

scholarly journals The effect of acute alcohol intoxication on risk attitude

2021 ◽  
Author(s):  
◽  
Kayleigh McCarty
Keyword(s):  
Decision Making ◽  
Personality Traits ◽  
Risk Taking ◽  
Alcohol Intoxication ◽  
Risk Attitude ◽  
Strong Relationship ◽  
Alcohol Problems ◽  
Acute Alcohol Intoxication ◽  
Placebo Condition ◽  
Risk Taking Behaviors

There is a strong relationship between engaging in risk taking behaviors, or behaviors with a high probability of negative and undesirable consequences, and the use of alcohol and other substances of abuse. Mounting evidence suggests that dysfunctional decision making contributes to the development and maintenance of addiction and related behaviors. This study explored the effects of acute alcohol intoxication on decision making under risk. Regular drinkers were recruited for a within subjects, placebo controlled, alcohol administration study. They completed a decision-making task at peak alcohol intoxication and at a time matched assessment in a placebo condition, as well as several baseline measures. The aim of this study was to examine whether alcohol intoxication impacts risk attitude. The associations between risk attitude and related personality traits, problematic alcohol use, and alcohol related risk-taking behaviors were also tested. The results of the study suggest that intoxicated risk attitude, and not risk attitude in the placebo condition, is associated with indices of alcohol consumption and to a lesser extent, alcohol consequences. Alcohol intoxication did not significantly impact risk attitude classification. Risk attitude was not associated with impulsive personality traits, alcohol expectancies, or risk-taking behaviors. While risk attitude may have utility for identifying those who are at risk for alcohol problems, tasks designed to assess behavior specific decision processes may be useful for understanding risky patterns of decision making.

scholarly journals ПРОЯВИ ОСОБИСТІСНИХ СМИСЛІВ У МОВЛЕННЄВІЙ КОМУНІКАЦІЇ ПІДЛІТКІВ

2020 ◽  
Vol 15 ◽  
pp. 116-121
Author(s):  
Tetiana Kyrychenko
Keyword(s):  
Personality Traits ◽  
Personal Meaning ◽  
Speech Communication ◽  
Categorical Analysis ◽  
Lexical Semantic ◽  
Speech Activity ◽  
Factors Influencing ◽  
Individual Personality ◽  
Semantic Interaction

According to the results of the study, it is pointed out that individual personality traits are manifested in the speech expression as a product of speech activity in the following characteristics: (1) proper linguistic (linguistic, speech and semantic); (2) psychological (motivational, cognitive, emotional, productive and resultative). The scientific and categorical analysis of the understanding the concept of personal meaning and the factors influencing its formation has been made. The article considers interpersonal speech communication of adolescents as a semantic interaction of its subjects, which involves the presence of such speech abilities as speaking and listening, the functional communicative unit of which is the statement (message) that is inextricably linked with the lexical-semantic and grammatical meanings.

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