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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
61

Comportamento social de machos e fêmeas castrados do gato doméstico (Felis catus L.) em confinamento. / Social behavior of neutered domestic cat (Felis catus L.) in confinement.

Oliveira, Ana Paula Ferreira de 13 February 2003 (has links)
O gato doméstico (Felis catus L.) exibe uma grande flexibilidade em seu comportamento social e no seu estilo de vida. Isto é devido a vários fatores, entre eles, disponibilidade de alimento e refúgio, mudanças ambientais, interação com o homem, composição dos grupos, características genéticas e a castração. Os animais machos e fêmeas não castrados e de vida livre exibem um repertório comportamental distinto, os machos tendem a ter uma vida mais solitária vagando por amplas extensões territoriais, enquanto que as fêmeas exibem uma vida mais gregária. O objetivo deste trabalho foi examinar o comportamento social de gatos domésticos castrados, machos e fêmeas, em confinamento com a intenção de se verificar os efeitos da castração no comportamento e se o repertório comportamental de ambos é sexualmente dimórfico, através das análises de freqüência e seqüência das categorias comportamentais. Foram levantadas 18 categorias comportamentais sociais e 12 categorias não sociais e foi observado o comportamento de 40 gatos domésticos machos (n=18) e fêmeas (n=22) num ambiente confinado (gatil) com área total de 19,2 metros quadrados, durante um período de 11 meses totalizando 160 horas de observação. Cada animal foi observado durante 15 minutos em cada sessão de observação, utilizando-se o método de amostra focal do comportamento. A análise de freqüência das categorias comportamentais sociais e não socais foram feitas através do teste estatístico não paramétrico de Mann-Whitney com nível de 5% de significância (p=0,05). Os resultados do teste não mostraram diferenças significativas entre os grupos de machos e fêmeas, indicando, assim, existir influência da castração nos comportamentos de ambos os grupos, ainda que preservando a individualidade dos animais. Contudo a análise seqüencial do comportamento mostrou uma mínima diferença entre os machos e fêmeas castrados mesmo na ausência da regulação hormonal do comportamento. Portanto conclui-se que parte do comportamento dos gatos não sofre influência hormonal e que o método de análise seqüencial do comportamento é refinado o suficiente para mostrar características comportamentais que não foram mostradas pela análise de freqüência. / The domestic cat (Felis catus L.) exhibits a great flexibility in its social behavior and lifestyle. This can be due to several factors, among them, food and refuge availability, environmental changes, interaction with humans, group composition, genetic characteristics and castration. Literature states that non neutered male and female animals of free life exhibit distinct behavioral repertoires. Males tend to have a more solitary life moving throughout wide territorial extensions, while females exhibit a more gregarious life. The aim of this work was to examine the social behavior of castrated domestic cats, males and females, in confinement, to verify the effects of neutering on the behavioral repertoire, through the frequency and sequence analyses of behavior. 18 social and 12 non social behavioral categories were selected. 40 domestic cats, males (n=18) and females (n=22), were observed in an indoor confined context with 19,2 square meters in area, for a period of 11 months and 160 hours of observation. Each animal was observed for 15 minutes in each observation session, being used the focal sample method. Statistical analysis for the frequency of each behavioral category, done using the non parametric test of Mann-Whitney with 5% (p=0,05) of significance, didn\'t show any significant gender difference, suggesting that castration change natural behavior, possibly because of a probable absence of sexual hormones. Sequential analysis, however, did show subtle gender differences, possibly raised by different environmental -- i.e. \'cultural\' -- influences in both male and female cats.
62

Social information-processing factors in children with internalizing and externalizing problems.

January 1999 (has links)
by Tam Miu Ping, Judy. / Thesis (M.Phil.)--Chinese University of Hong Kong, 1999. / Includes bibliographical references (leaves 45-48). / Abstract and questionnaire also in Chinese. / ABSTRACT --- p.ii / ACKNOWLEDGEMENTS --- p.iv / TABLE OF CONTENTS --- p.v / Chapter CHAPTER I - --- INTRODUCTION --- p.1 / The Social Information-processing model --- p.1 / "Processing styles of reactive aggressive children, proactive aggressive children, and depressed children" --- p.3 / Purpose of the present research --- p.11 / Chapter CHAPTER II - --- METHODS --- p.13 / Subjects --- p.13 / Measures --- p.13 / Procedures --- p.15 / Chapter CHAPTER III - --- RESULTS --- p.16 / Internal consistency of independent variables --- p.16 / Correlation between independent variables and dependent variables --- p.18 / Multiple regression --- p.22 / Structural equation model --- p.26 / Chapter CHAPTER IV - --- DISCUSSION --- p.36 / Prediction of internalizing disorder tendency by social information- processing factors --- p.36 / Prediction of reactive aggression by social information-processing factors --- p.37 / Prediction of proactive aggression by social information-processing factors --- p.38 / Cognitive distortion --- p.39 / "Differentiation of internalizing disorder, reactive aggression, and proactive aggression" --- p.39 / "Implication to treatment of children with internalizing disorder, reactive aggression, and proactive aggression" --- p.40 / Cross validation of the structural model --- p.42 / Construct validity of the measures of independent variables --- p.42 / Limitations of the present research and future directions --- p.42 / REFERENCES --- p.45 / APPENDICES --- p.49 / Questionnaire --- p.49 / Correlation among variables --- p.66
63

The role of specific central amygdala neurons in emotionally-triggered cataplexy

Woods, Caroline 03 July 2018 (has links)
Narcolepsy is a neurological disorder characterized by a person’s inability to regulate sleep-wake cycles. Excessive daytime sleepiness and cataplexy are prominent symptoms of narcolepsy. Cataplexy is partial to full body muscle atonia usually brought on by the person with narcolepsy experiencing a positive emotion. Some features of cataplexy resemble those of REM sleep, including similar brain activity and muscle atonia. The neuronal circuit that produces cataplexy has yet to be determined. The similarities between REM sleep and cataplexy support the hypothesis that cataplexy is the result of the REM atonia pathways being activated. An emotion processing region, the central amygdala (CeA), projects to known REM regulatory regions and plays a role in cataplexy. GABAergic neurons of the CeA are sufficient and necessary to trigger cataplexy in mice and project to brainstem regions that regulate muscle tone. Cataplexy is often triggered in a social setting, such as when seeing an old friend or telling a joke. Oxytocin (OT) is involved in many social behaviors, making it a viable link between social stimuli and cataplexy. We hypothesized that oxytocin receptor (OTR) neurons of the CeA, a sub-population of GABAergic neurons, promote emotionally-triggered cataplexy. To determine the social phenotype of the narcolepsy mouse model, the orexin knock-out (OXKO) mouse, we used established behavioral assays of social interaction and social memory. To determine if social reunification influenced the amount of cataplexy, group-housed OXKO mice were isolated for a short time and reunited with their littermates. To determine if OTR neurons of the CeA were sufficient and necessary to promote socially-triggered cataplexy, we used chemogenetic technology known as Designer Receptors Exclusively Activated by Designer Drugs (DREADDs) to selectively activate or inhibit these neurons. We injected adeno-associated viral vectors coding for either the excitatory hM3 Cre-dependent DREADD or the inhibitory hM4 Cre-dependent DREADD into the CeA of orexin knock-out mice crossed with OTR-Cre mice, allowing for expression of the DREADD exclusively in the OTR neurons of the CeA. After injection with either saline or clozapine-N-oxide (CNO) we put the mice through a behavioral assay to see if emotionally-triggered cataplexy increased or decreased following the activation or inhibition of OTR neurons of the CeA. The behavioral assays showed that acute social interactions in OXKO is normal, however they do have a social memory impairment. In addition, reunification promotes cataplexy in most OXKO mice. With the chemogenetic experiments, our number of mice is too low to report if OTR neurons of the CeA are sufficient and/or necessary for cataplexy at this time. / 2020-07-03T00:00:00Z
64

Social Ties over the Life Cycle in Blue Monkeys

Thompson, Nicole Aline January 2018 (has links)
The ways that individuals socialize within groups have evolved to overcome challenges relevant to species-specific socioecology and individuals’ life history state. Studying the drivers, proximate benefits, and fitness consequences of social interaction across life stages therefore helps clarify why and how social behavior has evolved. To date, juvenility is one life stage that field researchers have largely overlooked; however, individual experiences during development are relevant to later behavior and ultimately to fitness. Juvenile animals are subject to unique challenges related to their small size and relative inexperience. They are likely to employ behavioral strategies to overcome these challenges, while developing adult-like behavioral competence according to their species and sex. The research presented in this dissertation draws from long-term behavioral records of adult females and shorter-term behavioral records of juveniles from a population of blue monkeys (Cercopithecus mitis stuhlmanni) in western Kenya. I combine data on social behavior, demography, and biomarkers related to energetic and metabolic status, to assess both short and long term corollaries of social strategies in this gregarious Old World primate. I first explored whether the quality of social ties predicted longevity among adult female blue monkeys. Controlling for any effects of dominance rank, group size, and life history strategy on survival, I used Cox proportional hazards regression to model the both the cumulative and current relationship of social ties and the hazard of mortality in 83 wild adult females of known age, observed 2-8 years each (437 subject-years) in 8 social groups. The strength of bonds with close partners increased mortality risk under certain conditions: females that had strong bonds with partners that were inconsistent over multiple years had a higher risk of mortality than females adopting any other social strategy. Within a single year, females had a higher risk of mortality if they were strongly bonded with partners that were inconsistent from the previous year vs. with partners that were consistent. Dominance rank, number of adult female group-mates, and age at first reproduction did not predict the risk of death. This study demonstrates that costs and benefits of strong social bonds during adulthood can be context-dependent, relating to the consistency of social partners over time. To understand the adaptive value of social behavior among juveniles, it was first necessary to understand the conditions under which their social behavior occurred and with which it co-varied. I examined the social behavior of 41 juvenile blue monkeys, using data collected over 8 consecutive months. I analyzed variation in social activity budgets and partner number related to life history characteristics, socio-demographic conditions, and seasonal environmental change. I examined partner preferences according to kinship, and relative age and rank. Lastly, I explored the stability of juvenile social tendencies over time. Males and females differed strongly in their social activity budgets and partner numbers: males spent more time playing with more partners than females, whereas females spent more time grooming and sitting close with more partners than males. Nevertheless, they were much more similar in terms of their partner preferences. Juveniles generally preferred to interact with partners with whom they were closely related and that were similar in age and maternal rank. Juveniles’ affiliative and aggressive behavior varied seasonally, suggesting that these two types of behavior were related. Rates of agonism given and received were the only types of social behavior to demonstrate repeatable inter-individual differences. This analysis provides a comprehensive examination of juvenile behavior in blue monkeys, synthesizing findings with those in other primate and non-primate species. I then explored the short-term costs and benefits of juveniles’ sociality in terms of their effects on allostatic load. I examined variation in energy balance (as measured by urinary C-peptide), social style, and their influences on allostatic load (as measured by fecal glucocorticoid metabolites, fGCs). Juvenile energy balance varied according to sex, availability of ripe fruit, and rainfall. Both energy balance and social style predicted fGC levels, such that juveniles that had a higher energy balance, groomed less, and played more had lower fGCs. Time spent grooming interacted with energy balance in their effect on fGCs, such that individuals with higher energy balance actually had higher fGCs the more time they groomed. Neither maternal rank nor involvement in agonism corresponded with juvenile fGC levels. These results suggest that juvenile blue monkeys experience energetic stressors and that navigating the social environment via overt affiliative behavior, namely grooming, is a potentially stress-inducing endeavor. Lastly, to further understand variation in social behavior during juvenility, I explored the role of mothers in shaping juveniles’ affiliative tendencies. I examined whether the social behavior of juvenile animals resembled that of their mothers and whether their social behavior was subject to maternal effects, using data from the 41 juveniles and their 29 mothers. Juveniles’ grooming time with peers corresponded with the amount of time they groomed with (primarily being groomed by) mothers as infants, and this relationship varied by sex. Females spent less time grooming with peers the more maternal grooming they received during infancy, whereas males groomed with peers more. The time juveniles spent in other types of association with partners did not correspond with the same behavior in mothers, nor were other types of association subject to maternal effects. This exploratory study suggests limited effects of maternal behavior during infancy, but also that females and males respond differently to maternal investment during the first year. The results of this dissertation emphasize the importance of long-term studies of natural populations in understanding the evolution of social behavior, particularly when examining the causes and consequences of social ties over the life cycle in a long-lived animal. Strategies of affiliation did indeed correspond with costs and benefits over the life cycle, as they were relevant both to mortality in female adults and metabolic hormones among juveniles. Further, individuals socialize during development according to their life trajectory as male or female, what seasonal changes in the physical environment require or allow, and early-life maternal effects.
65

THE INTERPLAY OF DOMINANCE, POWER, AND PROSOCIALITY IN INTERPERSONAL RELATIONSHIPS

Unknown Date (has links)
The current studies examined the interplay of dominance and power in their effects on various forms of prosociality, along with potential mechanisms that may account for their differential effects. Study 1 found that dominance and power had opposing effects on general prosocial tendencies, with dominance negatively relating to and power positively relating to general prosociality. Study 2 found the negative effects of dominance to be consistent both for general and relationship-specific prosociality. The effects of power were not replicated for the outcomes shared with Study 1, but other positive associations were found between power and prosocial propensities. Indirect effects in studies 1 and 2 supported the potential mediating role of other focus in explaining the differential effects of dominance and power. Study 3 utilized an experimental design to directly examine the potential mediating role of other-focus, by manipulating independent versus interdependent self-construals. Significant interactions between power and condition supported the notion that power positively affects prosociality by increasing other-focus. In the interdependent condition, power significantly predicted perspective-taking, whereas in the independent condition, the effect of power on perspective-taking was not significant. Study 4 involved collecting dyadic data from romantic partners, but did not find any significant partner effects. In line with the other studies, dominance was negatively associated with self-reported supportive tendencies as well as self-reported perceptions of a partner’s supportive behaviors. / Includes bibliography. / Dissertation (Ph.D.)--Florida Atlantic University, 2019. / FAU Electronic Theses and Dissertations Collection
66

Social behavior in a group of captive bobcats : a study in the sociability of felids

House, Lon W. 01 January 1978 (has links)
A group of four captive bobcats (Felis rufus), two males and two females, was observed for 102.67 hours over the period of one year. A pilot study was conducted consisting of a minimum of three separate observations for each daylight hour. The remaining observations were concentrated during the early morning hours immediately after feeding, the time of maximum activity and social interaction.
67

Social behavior and communication in a herd of captive giraffe

Bashaw, Meredith J., January 2003 (has links) (PDF)
Thesis (Ph. D.)--School of Psychology, Georgia Institute of Technology, 2004. Directed by Terry L. Maple. / Vita. Includes bibliographical references (leaves 213-226).
68

Staff reactions to challenging behaviour : a preliminary investigation into their development over the course of an interaction

Levitan, T. K. January 2012 (has links)
Section A explores the insights offered by the qualitative literature to our understanding of staff responses to challenging behaviour within services for people with intellectual disabilities. The trustworthiness of the literature is examined. The studies are reviewed using the cognitive-emotional model as a guide and allowing for other themes to emerge. The review concludes with a discussion of the implications for future research and clinical practice. Section B reports on a pilot study investigating staff reactions to challenging behaviour within services for people with intellectual disabilities. This study sought to explore the development of staff cognitive, emotional and behavioural responses to challenging behaviour over the course of challenging interactions. Video elicitation interviews were conducted with six staff members responding to the challenging behaviour of two service users. Interview data were subject to content analysis and an attributional analysis in order to assess their cognitive and emotional responses as they were at the time. In addition, staff behaviour was subject to descriptive and sequential analyses to explore their relationship with cognitive-emotional variables. Results indicated that staff experienced a wide range of cognitions and emotions during challenging interactions. Cognitions varied over the course of an incident. A tentative relationship was found between internal attributions of challenging behaviour, negative emotions and verbal responses by staff. Staff members spontaneously made causal attributions of service user behaviour during challenging interactions. Rather than being a stable attribute of the staff member, attributions seem to vary to a degree across the course of an interaction. This has implications for both research and clinical practice.
69

Social Behavior and Gene Expression Disturbances in Mouse Models of Angelman Syndrome and Idic15 Autism

Stoppel, David Christopher January 2014 (has links)
Reciprocal changes in UBE3A gene dosage cause two neurodevelopmental disorders. Maternally inherited deletions of UBE3A cause Angelman syndrome, characterized by intellectual disability, motor defects, seizures, and a pathognomonic increased social motivation. Whereas maternally inherited triplications of UBE3A as in Idic15 Autism underlie decreased sociability and increased repetitive restrictive behaviors of this disorder. Identifying the cellular compartments and neuronal subtypes where excess and loss of Ube3a impair behavior is essential to understanding and potentially treating the disorders. In Chapter 2, we show that mouse models of maternal loss of UBE3A (Ube3a-mKO, Angelman syndrome) and triplication of UBE3A (Ube3a-2x, Idic15) have opposite effects on social behavioral and cortical gene expression. Social preference and social vocalizations are reduced in Ube3a-2x and increased in Ube3a-mKO mimicking the human phenotypes. Using a nuclear localizing signal tagged Ube3a transgenic mouse (Ube3a-NLS), we show that Ube3a acts in the nucleus to impair social behavior and cortical gene expression. Many of the genes reciprocally regulated by nuclear Ube3a are part of an Autism protein-interaction network. In Chapter 3, we demonstrate Ube3a-2x mice have increased aggression, an important Autism comorbidity. In contrast, maternal loss of Ube3a reduces aggression, consistent with the gregarious, amiable nature of individuals with Angelman syndrome. We then mapped the loci where increased Ube3a increases aggression. Increased aggression was observed when Ube3a was targeted to glutamatergic and vasopressinergic but not to GABAergic or oxytocinergic neurons. In Chapter 4, we show that in mice, social behavior is downregulated by social experience via Ube3a. In wild-type mice, altering their social environment strongly regulates their social behavior: individual housing causes hypersocial whereas group housing causes hyposocial behavior. In Ube3a-2x animals, group housing caused an excessive downregulation of social behavior whereas single housing fully rescued their social behavior deficits. By contrast, in Ube3a-mKO animals, the suppressive effects of group housing on social experience was largely blocked, suggesting Ube3a is required for this process. In summary, this thesis characterizes the role of UBE3A gene dosage in regulating social and aggression behaviors and identifies the subcellular compartment and neuronal subtypes where changes in Ube3a gene dosage disturb the homeostasis of these behaviors.
70

Group organization and activity patterns of desert bighorn sheep

Chilelli, MaryEllen January 1981 (has links)
No description available.

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