Selection on floral traits through male fertility in a natural plant population

Most studies on selection in plants estimate female fitness components and neglect male mating success, although the latter might also be fundamental to understand adaptive evolution. Information from molecular genetic markers can be used to assess determinants of male mating success through parentage analyses. We estimated paternal selection gradients on floral traits in a large natural population of the herb Mimulus guttatus using a paternity probability model and maximum likelihood methods. This analysis revealed more significant selection gradients than a previous analysis based on regression of estimated male fertilities on floral traits. There were differences between results of univariate and multivariate analyses most likely due to the underlying covariance structure of the traits. Multivariate analysis, which corrects for the covariance structure of the traits, indicated that male mating success declined with distance from and depended on the direction to the mother plants. Moreover, there was directional selection for plants with fewer open flowers which have smaller corollas, a smaller anther-stigma separation, more red dots on the corolla and a larger fluctuating asymmetry therein. For most of these traits, however, there was also stabilizing selection indicating that there are intermediate optima for these traits. The large number of significant selection gradients in this study shows that even in relatively large natural populations where not all males can be sampled, it is possible to detect significant paternal selection gradients, and that such studies can give us valuable information required to better understand adaptive plant evolution.

Changing ‘Multi-Problem Families’ – Developing a Multi-Contextual Systemic Approach

Over the past 30 years the Marlborough Family Service in London has pioneered multi-family work with marginalized families presenting simultaneously with abuse and neglect, family violence, substance misuse, educational failure and mental illness. The approach is based on a systemic multi-contextual mode and this chapter describes the evolving work, including the establishment of the first permanent multiple family day setting, specifically designed for and solely dedicated to the work with seemingly ‘hopeless’ families. The ingredients of ‘therapeutic assessments’ of parents and families are outlined and the importance of initial network meetings with professionals and family members is emphasized.

Parental Responsibility

Parental responsibility can be broadly defined as a legal term that specifies rights and responsibilities of parents towards their children. It is usually given initially to the birth mother and the married father, though unmarried fathers can obtain it either with the agreement of the mother or through a court order. In accordance with the provisions in law the court can also transfer parental responsibility to other persons (e.g. adoptive parents) or in cases of child abuse or neglect to the state, represented by local authority social services. While the concept of parental responsibility can be found in most countries, the exact terminology varies from one country to another, as well as over time.

Iowa State Daily (July 5, 2012)

ContentsPoll: How do you beat the heat?One-on-one: Lynette PohlmanEditorial: Scandal shows neglect by ISULocal acts get pumped to play 80/35Warner brothers race to Olympics

Sportvereine als Interessenorganisationen?! Ziel-Interessen-Divergenzen und ihre Auswirkungen

Einleitung: Freiwillige Sportorganisationen wie Sportvereine sind als Interessenorganisationen zu charakterisieren, deren primärer Organisationszweck sich auf die Vertretung der Interessen ihrer Mitglieder bezieht (Nagel, 2006). Mit dieser Interessenvertretungsfunktion wird gewährleistet, dass die Vereinsziele an die Mitgliederinteressen rückgebunden bleiben und Ziel-Interessen-Kongruenz herrscht (Schimank, 2005). Die Beobachtungen der Ver-einsrealität weisen jedoch darauf hin, dass die Ziele der Vereine oftmals von den Interessen ihrer Mitglieder abweichen und im Widerspruch zueinander stehen (Baur & Burrmann, 2003; Heinemann, 2004). Vor diesem Problemhintergrund ist zu fragen: Inwiefern stimmen die Vereinsziele mit den Mitgliederinteressen überein? Und für den Fall von Ziel-Interessen-Divergenzen, welche Auswirkungen ergeben sich daraus für die Vereine? Theoretisch-methodischer Ansatz: Für die theoriegeleite Beantwortung der Fragestellungen wurde auf Grundlage einer akteurtheoretischen Kon-zeptualisierung von Vereinen als Interessenorganisationen (Nagel, 2006; Schimank, 2007) ein strukturell-individualistisches Mehr-Ebenen-Modell entwickelt, dass zum einen das Verhältnis von Vereinszielen (Vereins-ebene) und Mitgliederinteressen (Mitgliederebene) und damit die Genese von Ziel-Interessen-Divergenzen erklärt. Zum anderen liefert das Modell eine Erklärungsgrundlage, welche Auswirkungen Divergenzen (struktu-relle Vereinssituation) auf die Mitglieder haben, d.h. wie die Mitglieder auf bestehende Divergenzen reagieren (individuelle Mitgliederhandlung). Die erforderlichen Vereins- und Mitgliederdaten wurden im Rahmen zweier Teilstudien erfasst, bei denen in erster Linie quantitative Erhebungs- und Auswertungsverfahren zum Einsatz kamen. Die erste Teilstudie wurde im Fürstentum Liechtenstein zur Analyse der Ziel-Interessen-Übereinstimmung durchgeführt, wobei hierzu die Präsidenten von 17 Vereinen und 481 Mitglieder schriftlich befragt wurden. In der zweiten Teilstudie wurde im Schweizer Turnverein Länggasse Bern mit 199 Mitgliedern eine schriftliche Befragung durchgeführt, um die Auswirkungen von Divergenzen zu analysieren. Zur Erfassung des Ausmasses von Ziel-Interessen-Divergenzen wurde eine Vergleichsprüfung der Vereinsziele und Mitgliederinteressen durchgeführt. Die Liechtensteinischen Vereinspräsidenten und Vereinsmitglieder mussten diesbezüglich die Bedeutung von 23 verschiedenen Items eines entwickelten Ziel-/Interessen-Fragekataloges einschätzen und über den betragsmässigen Bedeutungsunterschied konnte das quantitative Divergenzmass bestimmt werden. Um die Frage nach den Auswirkungen zu klären, hatten die Mitglieder des Schweizer Turnvereins Länggase Bern Aussagen über ihre Reaktionen auf bestehende Divergenzen entlang einer konzipierten Handlungstypologie (exit, voice, loyalty, neglect) zu geben. Ergebnisse: Die Befunde der Vergleichsanalyse zeigen, dass in allen untersuchten Vereinen Ziel-Interessen-Divergenzen in unterschiedlichem Ausmaß existieren. Bei einem Drittel der Vereine bestehen mittlere Divergenzen und in zwei Drittel sind größere Divergenzen zu beobachten. Divergenzen bestehen dabei vor allem hinsichtlich des Brei-tensports (v.a. Erweiterung des Sportangebots), der Vereinsentwicklung (v.a. Öffnen für neue Entwicklungen) und der Geselligkeit (v.a. aussersportliches Angebot, Wahrung der Vereinstradition). Die Analyse der Auswirkungen zeigt, dass geringe und mittelstarke Divergenzen in erster Linie zu konstruktiven Reaktionen führen. Die Mitglieder machen dabei die Vereinsführung auf diese Situation aufmerksam (voice), indem sie das Problem ansprechen und Vorschläge zur Problemlösung unterbreiten. Oder sie haben aus Grün-den der Vereinsverbundenheit (loyalty) die Hoffnung und das Vertrauen, dass die Vereinsführung ohne ihr Eingreifen das Problem löst. Wenn aber großen Divergenzen existieren, die sich für die Vereine zu einem gra-vierenden Problem entwickeln, tendieren die Mitglieder hingegen verstärkt zu destruktiven Reaktionen, die sich durch Gleichgültigkeit und Desinteresse am Vereinsgeschehen (neglect) äussern, indem die Mitglieder zukünftig nicht mehr auf Vereinsanlässe gehen. Oder sie wählen die Option des Rückzugs und Austritts (exit), indem sie ihr Vereinsengagement aufgeben oder im Extremfall aus der Abteilung oder dem Verein austreten. Diskussion: In der Vereinsrealität stellen Ziel-Interessen-Divergenzen offenbar eher die Norm als die Ausnahme dar, so dass die Vereinsziele nur teilweise an die Mitgliederinteressen rückgebunden sind. Allerdings sind Divergenzen nicht grundsätzlich als Problem zu interpretieren, sondern sind vielmehr in Abhängigkeit ihrer Intensität zu beurtei-len. Diesbezüglich dürften Vereine geringfügig bis mittelmässig ausgeprägte Divergenzsituationen im laufenden Vereinsgeschehen bis zu einem gewissen Grad relativ gut aushalten und aufarbeiten können, weil die Mitglie-der in diesem Fall zu einem konstruktiven Umgang tendieren, die eine Wiederherstellung von Ziel-Interessen-Kongruenz begünstigt. Demgegenüber können sich aber grosse Divergenzen zu einem ernsthaften Problem für Vereine entfalten, weil die Mitglieder in diesem Fall zu destruktiven Reaktionen neigen, die sich negativ auf die Vereinsentwicklung auswirken dürfte. Literatur Baur, J. & Burrmann, U. (2003). Konflikte in Sportvereinen. In J. Baur & S. Braun (Hrsg.), Integrationsleistungen von Sport-vereinen als Freiwilligenorganisationen (S. 331-370). Aachen: Meyer & Meyer. Nagel, S. (2006). Sportvereine im Wandel. Akteurtheoretische Analysen zur Entwicklung von Sportvereinen. Schorndorf: Hofmann. Nagel, S. (2007). Akteurtheoretische Analyse der Sportvereinsentwicklung. Ein theoretisch-methodischer Bezugsrahmen. Sportwissenschaft, 37 (2), 186-201. Schimank, U. (2005). Der Vereinssport in der Organisationsgesellschaft: organisationssoziologische Perspektiven auf ein spannungsreiches Verhältnis. In T. Alkemeyer, B. Rigauer & G. Sobiech (Hrsg.), Organisationsentwicklungen und De-Institutionalisierungsprozesse im Sport (S. 21-44). Schorndorf: Hofmann. Schimank, U. (2007). Handeln und Strukturen. Einführung in die akteurtheoretische Soziologie. Weinheim: Juventa Verlag.

NEW TOOLS FOR MONITORING GAMMA CAMERA UNIFORMITY

Detector uniformity is a fundamental performance characteristic of all modern gamma camera systems, and ensuring a stable, uniform detector response is critical for maintaining clinical images that are free of artifact. For these reasons, the assessment of detector uniformity is one of the most common activities associated with a successful clinical quality assurance program in gamma camera imaging. The evaluation of this parameter, however, is often unclear because it is highly dependent upon acquisition conditions, reviewer expertise, and the application of somewhat arbitrary limits that do not characterize the spatial location of the non-uniformities. Furthermore, as the goal of any robust quality control program is the determination of significant deviations from standard or baseline conditions, clinicians and vendors often neglect the temporal nature of detector degradation (1). This thesis describes the development and testing of new methods for monitoring detector uniformity. These techniques provide more quantitative, sensitive, and specific feedback to the reviewer so that he or she may be better equipped to identify performance degradation prior to its manifestation in clinical images. The methods exploit the temporal nature of detector degradation and spatially segment distinct regions-of-non-uniformity using multi-resolution decomposition. These techniques were tested on synthetic phantom data using different degradation functions, as well as on experimentally acquired time series floods with induced, progressively worsening defects present within the field-of-view. The sensitivity of conventional, global figures-of-merit for detecting changes in uniformity was evaluated and compared to these new image-space techniques. The image-space algorithms provide a reproducible means of detecting regions-of-non-uniformity prior to any single flood image’s having a NEMA uniformity value in excess of 5%. The sensitivity of these image-space algorithms was found to depend on the size and magnitude of the non-uniformities, as well as on the nature of the cause of the non-uniform region. A trend analysis of the conventional figures-of-merit demonstrated their sensitivity to shifts in detector uniformity. The image-space algorithms are computationally efficient. Therefore, the image-space algorithms should be used concomitantly with the trending of the global figures-of-merit in order to provide the reviewer with a richer assessment of gamma camera detector uniformity characteristics.

The Challenge of Preventing Teen Pregnancy in Texas

A reduction in teen pregnancy and subsequent reduction in teen births correlates to myriad improvements in personal (e.g., high school completion, experience of abuse and neglect, etc); social (e.g., number of children in single parent families, life-long poverty, incarceration rates, etc); and economic (e.g., Medicaid costs, decreased tax revenue, etc) outcomes. In 2005, over 73,000 teen girls in Texas age 15-19 became pregnant, a number significantly higher than any other state. Given the severity of the issue the formation of a statewide organization in Texas devoted to addressing the prevention of teen pregnancy is long overdue. The challenge of reducing teen pregnancy is daunting yet there is momentum and a cadre of committed individuals who have formally put together an organization to provide guidance, oversight and a statewide voice of leadership - all things needed to be successful reducing teen pregnancy in Texas. This commentary provides reactions to proposed strategies and to-date lessons learned.

Family Stability and Childhood Behavioral Outcomes: A Critical Review of the Literature

As the definition of what is considered a family changes in our society, the family unit itself continues to undergo changes. These changes can sometimes lead to decreased stability within the family unit. One of the greatest challenges facing those researching this phenomenon is the lack of consistency within the existing body of research surrounding what familial instability actually is (the definition). This critical review of the literature examines the current body of literature in order to identify what is known about family stability and its impact on adolescent behavior, as well as what gaps currently exist. This review focuses on definitions of family stability, current factors surrounding the stability of the family unit, and addresses the implications that the current body of literature presents.

Considering the Consequences of Child Welfare Service Decisions

The following commentary serves as a response to the article, “That Wall is Around My Heart,” underscoring the importance of decision making in child welfare services. The commentary supports the need for child welfare systems to carefully consider the long-term consequences of various service intervention strategies. Child welfare systems must attend to both the internal external elements of safety, giving special attention to the emotional trauma of child maltreatment and the trauma resulting from removal and placement in alternative care. The commentary supports the need for child welfare systems to provide effective interventions that prevent and respond to child abuse and neglect, as well as break the cyclical nature of child maltreatment, helping ensure the safety of children and families for future generations.

The Role of Cortisol in the Cycle of Violence

Child abuse and neglect are universal risk factors for delinquency, violence and aggression; this phenomenon is known as the cycle of violence. Despite a wide body of research demonstrating this phenomenon, the processes which mediate this relationship remain largely unknown. One potentially relevant result of abuse and neglect may be disruptions in the development of the body’s stress response, specifically the function of the Hypothalamic-Pituitary-Adrenal (HPA) axis. The HPA-axis, and its end-product, cortisol, may play a role in regulating aggressive behavior, but this function may be disrupted following abuse and neglect. Another risk factor for aggression, psychopathy, may mediate the cycle of violence or independently contribute to aggressive behavior. This study examined the relationship between child abuse and neglect, HPA-axis function, psychopathy and aggression. History of abuse was measured using a self-report questionnaire, the Childhood Trauma Questionnaire. Using a within-subject, placebo-controlled, counter-balanced dosing design, 67 adults were given an acute dose of 20mg cortisol as a challenge to the HPA-axis. Following dosing, measures of cortisol response were obtained through saliva samples, and state-aggressive behavior was measured by a laboratory task, the Point-Subtraction Aggression Paradigm (PSAP). Basal measures of cortisol were obtained prior to dosing. Psychopathy and a trait-measure of aggression were assessed through self-report questionnaires. PSAP data and trait-aggression scores were normalized and summed for an overall aggression score. Linear regression analyses indicated that a history of abuse and neglect robustly predicted aggression, supporting the cycle of violence hypothesis. Further, abuse and neglect predicted a diminished HPA-axis response to the cortisol challenge. Although a diminished HPA-axis response significantly predicted increased aggression, mediation analysis revealed that HPA-axis reactivity did not mediate a significant portion of the effect of abuse and neglect on aggression. However, HPA-axis reactivity did mediate part of the effect, indicating that HPA-axis function may be a factor in the cycle of violence. Psychopathy robustly predicted increased aggression. Although the results indicate that cortisol, psychopathy and HPA-axis function are involved in the cycle of violence, further research is required to better understand the complex interaction of these factors.

Behavior Problems of Maltreated Children Receiving In-Home Child Welfare Services

This study evaluates the level of behavior problems in a previously little studied group—children with founded cases of abuse and neglect receiving child welfare services in their own homes. A sample of 149 maltreated children, living at home, were evaluated on the CBCL as they entered a service program to which they were referred by a large public child protective service system. These children were found to have elevated levels of behavior problems, with 43.6% scoring in the problematic range, a rate similar to children entering foster care. Practice and policy implications of these findings are discussed and highlighted.

An Examination of Treatment Fidelity in an Intensive Family Preservation Program

Most models of intensive family preservation services are based on providing flexible services to reduce risk and keep families together. This study examined 40 cases served by a public agency Family Preservation Unit in 1992-1993, in order to assess the provision of hard, soft and enabling services in the program and whether their provision matched the program model. The relationships of these services to program outcomes, in terms of child removal, new reports of abuse or neglect, and family gains in resources and strengths, are also assessed.

Toxic Stress and Child Hunger Over the Life Course: Three Case Studies

The causes and contexts of food insecurity among children in the U.S. are poorly understood because the prevalence of food insecurity at the child level is low compared to the prevalence of household food insecurity. In addition, caregivers may be reluctant to admit their children may not be getting enough food due to shame or fear they might lose custody of their children. Based on our ongoing qualitative research with mothers of young children, we suggest that food security among children is related to adverse childhood experiences of caregivers. This translates into poor mental and physical health in adolescence and adulthood, which can lead to inability to secure and maintain meaningful employment that pays a living wage. In this paper we propose that researchers shift the framework for understanding food insecurity in the United States to adopt a life course approach. This demands we pay greater attention to the lifelong consequences of exposure to trauma or toxic stress—exposure to violence, rape, abuse and neglect, and housing, food, and other forms of deprivation—during childhood. We then describe three case studies of women from our ongoing study to describe a variety of toxic stress exposures and how they have an impact on a woman’s earning potential, her mental health, and attitudes toward raising children. Each woman describes her exposure to violence and deprivation as a child and adolescent, describes experiences with child hunger, and explains how her experiences have shaped her ability to nourish her children. We describe ways in which we can shift the nature of research investigations on food insecurity, and provide recommendations for policy-oriented solutions regarding income support programs, early intervention programs, child and adult mental health services, and violence prevention programs.

Chapter Six – Individual Trait Variation and Diversity in Food Webs

In recent years, there has been a renewed interest in the ecological consequences of individual trait variation within populations. Given that individual variability arises from evolutionary dynamics, to fully understand eco-evolutionary feedback loops, we need to pay special attention to how standing trait variability affects ecological dynamics. There is mounting empirical evidence that intra-specific phenotypic variation can exceed species-level means, but theoretical models of multi-trophic species coexistence typically neglect individual-level trait variability. What is needed are multispecies datasets that are resolved at the individual level that can be used to discriminate among alternative models of resource selection and species coexistence in food webs. Here, using one the largest individual-based datasets of a food web compiled to date, along with an individual trait-based stochastic model that incorporates Approximate Bayesian computation methods, we document intra-population variation in the strength of prey selection by different classes or predator phenotypes which could potentially alter the diversity and coexistence patterns of food webs. In particular, we found that strongly connected individual predators preferentially consumed common prey, whereas weakly connected predators preferentially selected rare prey. Such patterns suggest that food web diversity may be governed by the distribution of predator connectivity and individual trait variation in prey selection. We discuss the consequences of intra-specific variation in prey selection to assess fitness differences among predator classes (or phenotypes) and track longer term food web patterns of coexistence accounting for several phenotypes within each prey and predator species.

Learning enjoyment in early adolescence

There is empirical evidence showing that positive emotional and motivational factors in formal learning contexts decrease at the stage of young adolescence. According to Stage-Environment-Fit Theory and Self-Determination Theory, this change should be explained by a non-fulfilment of students' needs. By combining two different methods (questionnaires and day-to-day diaries) and applying a longitudinal design, this study aimed to explore the change in and the determinants of habitual and actual learning enjoyment. The sample consisted of 356 students. Quantitative results indicated that learning enjoyment and classroom practices decreased between Grades 6 and 7. Path analyses revealed that classroom practices are the source of students' learning enjoyment, while self-efficacy functions as a partial mediator. Data from students' diaries showed that a teacher's neglect of students' needs for competence and relatedness were significant sources of impeded learning enjoyment. Practical implications suggest the relevance of adjusting learning conditions to the needs of young adolescents in order to provide a facilitating basis for learning enjoyment.