986 resultados para Dimorfismo sexual (Animais)


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In recent years, both catholica and protestant churches in Australia, the US and elsewhere have found themselves embroiled in allegations of sexual abuse-allegations which have often been substantiated.  Reports in the secular and the religious press of these allegations have been so numerous as to have become a constant blur on the horizon.  We have heard much about investigations, about the tragedies affecting individuals and communities, about financial settlements, and about clergy being ousted from pastoral roles.  But after the public scandals have died down, the paim for many lives on.

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The purpose of this study was to examine the relationship between body image and social and sexual functioning. The respondents were 426 men and women from metropolitan and rural Victoria, who ranged in age from 18 to 86 years (mean age = 42.26). Respondents completed measures of attractiveness, body satisfaction, body image importance, body image behaviours, appearance comparison, social physique anxiety, self-esteem, depression, anxiety, and social and sexual functioning. Regression analyses were used to detelmine the prediction of social and sexual functioning by body image variables for men and women of different age groups, beyond the effects of psychological adjustment. The results demonstrated that while there were moderate correlations between body image and sociallsexual functioning variables, many of these relationships were best explained by the shared variance of self-esteem. There were some exceptions, particularly among middle-aged men, which are discussed.

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The recent spate of sexual assault allegations made against Australian Football League (AFL) players has generated intense media scrutiny and public concern. Following from similar highly publicised allegations directed at the National Rugby League, these incidents have engendered significant debates around sexism and football culture in the popular press. It is the media’s response to allegations of sexual assault made against AFL footballers that will be analysed here. This study offers a content analysis of articles from the sport sections of two major Australian newspapers, The Age and the Herald-Sun, with the aim of assessing the prevalence of women’s perspectives on the issue of player misconduct and whether the gender of the reporter has any bearing on gender stereotyping in sport reporting. By assessing how the phenomenon of player misconduct has been covered in sport news, this paper evaluates the media’s role in changing dominant attitudes and perceptions of gender relations in Australian society.

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From interviews conducted in Victoria with women fans of Australian Rules Football, this paper examines their perceptions and rationalisations of alleged sexual misconduct by players. The paper is situated in the seeming contradiction of women avidly supporting male dominated sports despite players being implicated in misconduct against their gender. Women fans' voices about the reported misconduct are explored. These fall into two main categories that are referred to as the 'predatory female' and the 'rogue male' narratives. The former suggests that the sexual assertiveness of some women - the 'groupies' - unlocks men's primal sexuality. The latter points to footballers being immersed in a hyper-masculine sub-culture that predisposes them to treat women in an arbitrary, demeaning manner. The fans' voices, while condemning players' misconduct, suggest that predatory females, by actively seeking out footballers, become victims
because they trigger testosterone driven male responses. Rogue male behaviour is deprecated, but understood as stemming from masculine ways, accentuated by team bonding, that leads some individuals into misconduct, possibly as a means of emphasising their masculinity within their group. Explaining player misconduct in these ways enables fans to distance themselves from it and continue their passionate support of
football.

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For free‐spawning organisms that release gametes into the sea, sperm limitation (too few sperm to fertilize all eggs) is a major factor limiting reproductive success. Given such circumstances, the presence of several mechanisms to prevent polyspermy (too many sperm) may seem paradoxical; however, a growing body of data suggests that natural fertilization levels, though variable, can routinely be high. Under such conditions, polyspermy is much more likely. The tension between sperm limitation and polyspermy represents sexual conflict because males, in competing to fertilize as many eggs as possible, can impose lethal costs on eggs if multiple sperm gain entry. Here we present data for a marine invertebrate indicating high levels of polyspermy under sperm‐limited conditions. When the sea urchin Evechinus chloroticus was induced to spawn in situ, mean rates of polyspermy were 17.3% ±3.4%, and polyspermy was recorded at rates as high as 62.7%. Polyspermy was nearly always present, even when fertilization rates were <50%, confirming predictions that it should be present under sperm‐limited conditions. Both sperm limitation and polyspermy imposed substantial reproductive costs, and we conclude that both sexual conflict related to polyspermy and sperm limitation have been simultaneous strong selective forces shaping the evolution of reproductive traits in the sea.

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Gender differences in perceptions of sexual intent and commitment have been the subject of formal and informal inquiry for considerable time. One evolutionary theory, Error Management Theory (EMT), predicts that opposite-sex perceptions of female sexual intent and male commitment intent reflect intrinsic biases that minimize gender-specific evolutionary costs. The results supporting these hypotheses were obtained from subjects regardless of mood. We hypothesized that mood would influence ratings of sexual and commitment intent. Sixty participants (30 males, 30 females) were recruited and exposed to a positive and negative mood condition in counterbalanced groups using video stimuli. Preliminary analyses found an unexpected effect of order of mood induction, necessitating separate analyses of the Positive-Negative (PN) and Negative-Positive (NP) groups. Contrary to the original study, there were no gender effects. Positive moods led to increased ratings of both sexual and commitment intent across genders. Further, negative to positive mood-change was associated with significantly increased ratings. Both males and females attributed significantly higher sexual intent to same-sex rivals than themselves, but only males assessed themselves as having significantly higher commitment intent than same-sex rivals. The EMT model may require adaptation to acknowledge effects of variables such as mood on its predictions of gender-specific biases.

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The study evaluated relationships and sexuality among people with multiple sclerosis (MS) and their partners. The results were compared to findings among couples in the general population. Participants were 45 heterosexual people with MS and their partners and 32 heterosexual people from the general population and their partners. There was a high level of concordance between the views of couples from the general population, but not among couples where one partner had MS. Partners of people with MS were more likely than people with MS to feel that MS had a negative impact on the physical and emotional support in their relationship. People with MS also experienced more problems in their relationship and sexual functioning, but not their sexual satisfaction, than people from the general population. The implications of these results in terms of support programs for people with MS and their partners are discussed.

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Sexual abuse profoundly affects survivors to the extent that they are unable to maintain previously held viewpoints or ways of being, including those relating to their spirituality. Certainly the experience has considerable potential to complicate the spiritual lives of survivors. For Christian survivors, this may include how they perceive and relate to both themselves and God as well as affect participation in sacraments such as eucharist and reconciliation. Spiritual traditions often promote the embracing of silence, but this may be problematic for survivors who have been silenced and unable to give expression to their experiences. Similarly, socialization resulting in beliefs that Christians should always forgive and/or never be angry needs to be overcome. While negotiating these pitfalls may result in explorations of spirituality being even less straightforward for survivors of sexual abuse than it is for others, a transformative spirituality within a Christian framework can be realized.

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Objective: For successful prosecution of child sexual abuse, children are often required to provide reports about individual, alleged incidents. Although verbally or mentally rehearsing memory of an incident can strengthen memories, children’s report of individual incidents can also be contaminated when they experience other events related to the individual incidents (e.g., informal interviews, dreams of the incident) and/or when they have similar, repeated experiences of an incident, as in cases of multiple abuse.

Method: Research is reviewed on the positive and negative effects of these related experiences on the length, accuracy, and structure of children’s reports of a particular incident.

Results: Children’s memories of a particular incident can be strengthened when exposed to information that does not contradict what they have experienced, thus promoting accurate recall and resistance to false, suggestive influences. When the encountered information differs from children’s experiences of the target incident, however, children can become confused between their experiences—they may remember the content but not the source of their experiences.

Conclusions: We discuss the implications of this research for interviewing children in sexual abuse investigations and provide a set of research-based recommendations for investigative interviewers.