The construction of the adolescent male body through sport

The present study examined the role played by sport in understanding adolescent males' views about their body. Semi-structured interviews were conducted with 40 adolescent boys aged between 15 and 17 years. An inductive thematic analysis of boys' narratives showed that sport provided adolescent males with a context for discussing their body image. Attributes which males liked about their body were synonymous with those associated with being successful at sport. In addition, sport was used as a forum for competing with other males both through playing sport and by using sport performance to make favourable social comparisons about their body size.

Body image attitudes and concerns among indigenous Fijian and European Australian adolescent girls

Research on body image has primarily been conducted among Western women who highly value the thin ideal body size. There has been limited research that has examined body image attitudes among Fijian adolescent girls who are exposed to both traditional sociocultural pressures that promote a larger body size and Western pressures that promote slimness. Using in-depth semi-structured interviews, we examined the factors associated with body image attitudes and concerns among a sample of 16 indigenous Fijian and 16 European Australian adolescent girls aged between 13–18 years. An inductive analysis of girls’ responses indicated that both groups of girls experienced body image concerns including body dissatisfaction, a preference for thinness and concerns associated with weight gain. These findings have implications for our understanding of the role of culture in shaping body image among girls and may prove useful in the development of future survey research that can be implemented among both Fijian and Western adolescents.

Scallop size does not predict amount or rate of induced sperm release

Within populations of broadcast spawning marine invertebrates such as scallops, larger animals typically have larger gonads. Presumably, this means those larger males have more sperm to release than small males. However, there has never been a direct test of whether larger males actually release more sperm, at a higher rate, during spawning. To address this, we compared the allometry of induced sperm release with that of reproductive investment (gonad weight) in ripe males of 2 species of scallops, Chlamys bifrons and Chlamys asperrima. We did not find that larger scallops released more sperm or released it faster than small scallops, and were able to reject the hypothesis that instantaneous sperm release was related to body size in the same way as gonad weight. Consequently, we speculate that if larger broadcast spawning males do release more sperm, they may do so by spawning on more occasions within a reproductive season.

Media influences on attitudes and perceptions toward the body among adult men and women

The current study investigated media influences on men's and women's body perception. Participants were 60 men and 60 women. Men overestimated their chest, waist, and thighs and underestimated their hips. Women overestimated the size of all body parts. Men's and women's perception of their body was not predicted by media exposure or attitudes to the media. Both men's and women's ideal body was different from their current bodies. Attitudes and exposure to the media predicted men's (but not women's) perceptions of the ideal body held by the media, as well as both men's and women's ideal chest and waist. These findings suggest that the media has an impact on the ideal body size of both men and women.

Body image and body change strategies among adolescent males and females from Fiji, Tonga and Australia

The current study was designed to investigate the body image and body change strategies of adolescents from Fiji, Tonga and Australia. Participants were 628 Fijians, 463 Indo-Fijians, 598 Tongans and 535 European Australians. Adolescents completed measures of height, weight, body dissatisfaction, strategies to lose weight, increase weight and increase muscles. The results demonstrated that overweight adolescents were more dissatisfied with their bodies than those who were normal weight. Overweight Fijians and Tongans were more satisfied with their body than Indo-Fijian or Australian adolescents. Tongans, followed by Fijians and Indo-Fijians, were more likely to engage in strategies to lose weight, increase weight and increase muscles. These results are consistent with the focus in Fiji and Tonga on the value of the large body ideal, but may also reflect the recent focus on the attainment of a healthy body size.

Size matters : extraordinary rodent abundance on an Australian tropical floodplain

Published estimates of the total biomass of natural populations of mammalian herbivores generally have ignored small-bodied taxa (especially, rodents). Including such taxa may dramatically change our understanding of total biomass and energy flow in such systems. Dusky rats (Rattus colletti) are small (up to 210 g) native Australian mammals, and our 5-year mark-recapture study on a tropical flood plain (Adelaide River, Northern Territory) revealed that rat biomass can reach extraordinary levels (up to 4.7 t km⁻²). Because their small body size results in high mass-specific metabolic rates, a given biomass of rodents has a several-fold higher total energy requirement than the same mass of large-bodied herbivores. Accordingly, during some years dusky rat biomass can be double that estimated for large herbivores on the world's most productive savannas in eastern and southern Africa. The huge rodent biomass strongly suggests that the Adelaide River flood plain must be an incredibly productive habitat. Considering the immense biological importance of these productive ecosystems, flood plain conservation must be placed high on the priority list of habitats that require immediate protection.

Remaking the body : explorations in the sociology of embodiment

As embodied social agents our lives are preoccupied with the production and reproduction of bodies. Making, unmaking and remaking our embodiment are ongoing activities. Eating, exercise, washing, grooming, dressing, for example, are activities in which the body engages in routine tasks of bodily management. Such activities can be seen as everyday rehabilitation. The study explores the impact of major physical impairment on embodiment, and on the processes involved in re-embodiment after catastrophic injury or disease. The experiences of the people in this study dramatically highlight the continuous, but largely taken for granted processes involved in our embodiment. Four analytical strands are interwoven throughout the study. The first strand relates to the frailty and vulnerability of the human body, characteristics which are epitomised by the bodies of the informants in this study. The second strand engages with key aspects of the context in which re-embodiment takes place, namely a context replete with crisis, danger, fear, uncertainty and risk. The third strand projects into the future in considering the ongoing project of self. The fourth strand addresses the institutional and social impediments which may confine vulnerable bodies and limit the exploration of more expansive bodies. The study is situated within the general theoretical approach of the sociology of the body. While recognizing the powerful impact of social discourse in the production of bodies, the study focuses on the critical role of embodiment in the reconstitution of self. The people in this study have experienced profound bodily change, but although this damage has disrupted, it has not annihilated their embodied selves. The people still possess and occupy their bodies. It is the obduracy of embodiment which directs the processes involved in remaking the body.

The function of zinc transporter genes in human cells

Zinc is an essential nutrient for all living organisms and a deficiency may result in major health problems. This project provides insights into how zinc is processed by cells within the human body. The experiments also contribute to a better understanding of the molecular basis of zinc deficiency disorders. Novel procedures developed in this project may prove invaluable to the wider scientific community.

Sociocultural influences of body image among Australian and Fijian girls

Despite a traditional emphasis on a large body size in Fiji, both Australian and Fijian girls' had relatively similar body image attitudes and weight change behaviours. However, in comparison to Australian girls, Fijian girls experienced conflicting messages about losing and gaining weight.

Human-computer interaction in ubiquitous computing environments

Purpose – The purpose of this paper is to explore characteristics of human-computer interaction when the human body and its movements become input for interaction and interface control in pervasive computing settings.

Design/methodology/approach – The paper quantifies the performance of human movement based on Fitt's Law and discusses some of the human factors and technical considerations that arise in trying to use human body movements as an input medium.

Findings – The paper finds that new interaction technologies utilising human movements may provide more flexible, naturalistic interfaces and support the ubiquitous or pervasive computing paradigm.

Practical implications – In pervasive computing environments the challenge is to create intuitive and user-friendly interfaces. Application domains that may utilize human body movements as input are surveyed here and the paper addresses issues such as culture, privacy, security and ethics raised by movement of a user's body-based interaction styles.

Originality/value – The paper describes the utilization of human body movements as input for interaction and interface control in pervasive computing settings.

Tolerance of larger body sizes by young adults living in Australia and Hawaii

Identifying the barriers to achieving an appropriate body size is important for health. This study investigated young adults' tolerance of excess weight in other adults. Participants were 172 students (65 male, 107 female) with a mean age of 22.24 years (SD = 1.61). Half the participants resided in Australia, and half in Hawaii. Students from both countries were found to be tolerant of body sizes larger than those recommended for good health. These results help inform our understanding of the factors that may influence weight gain, and have important implications for the worldwide obesity problem and related health issues.

Body image, drive for muscularity, and social comparisons in men

The results of this thesis indicated that males engage in comparisons when evaluating their bodies and more frequently use similar others, such as friends and the average male for comparison. The results showed that comparisons to males in the media and professional athletes indicated body dissatisfaction and drive for muscularity.The portfolio presents four eating disorder case studies to illustrate how a therapist can use manual-based CBT techniques in a flexible manner and adapt interventions to the individual needs of clients who have motivational issues or present with complex comorbidity, in order to improve treatment outcomes.

Ecological correlates of the threat of extinction in neotropical bird species

Predicting the threat of extinction aids efficient distribution of conservation resources. This paper utilises a comparative macroecological approach to investigate the threat of extinction in Neotropical birds. Data on ecological variables for 1708 species are analysed using stepwise regression to produce minimum adequate models, first using raw species values and then using independent contrasts (to control for phylogenetic effects). The models differ, suggesting phylogeny has significant effects. The raw species analysis reveals that number of zoogeographical regions occupied, elevational range and utilisation of specialised microhabitats were negatively associated with threat, while minimum elevation and body mass were positively associated, whereas the independent contrasts analysis only identifies zoogeographical regions as important. Confining the analysis to the 582 species restricted to a single zoogeographical region reveals elevational range and number of habitats occupied to be negatively correlated with threat whether the analysis is based on the raw data or on independent contrasts. Analysis of four contrasting zoogeographical regions highlights regional variation in the models. In two Andean regions the threat of extinction declines as the elevation range across which the species occurs increases. In the presence of substantial human populations on high Andean plateaus, a species with a greater elevational range may be more likely to persist at some (relatively) unsettled altitudes. In Central South America, the strongest predictor of threat is minimum elevation of occurrence: species with a lower minimum are less threatened. The minimum elevation result suggests that lowland species experiencing an ecological limit to their minimum elevation (min. elevation >0 m) may be more at risk than those not experiencing such a limit (min. elevation = 0 m). Finally, in southern Amazonia, where there is little altitudinal variation, the only weak predictors of threat are body size, larger species being more threatened, and number of habitats, species occupying more habitats being less threatened. These contrasting results emphasise the importance of undertaking extinction risk analyses at an appropriate geographical scale. Since the models explained only a low percentage of total variance in the data, the effects of human-mediated habitat disturbance across a wide range of habitats may be important.

Geographical variation in bill size across bird species provides evidence for Allen's rule

Allen’s rule proposes that the appendages of endotherms are smaller, relative to body size, in colder climates, in order to reduce heat loss. Empirical support for Allen’s rule is mainly derived from occasional reports of geographical clines in extremity size of individual species. Interspecific evidence is restricted to two studies of leg proportions in seabirds and shorebirds. We used phylogenetic comparative analyses of 214 bird species to examine whether bird bills, significant sites of heat exchange, conform to Allen’s rule. The species comprised eight diverse taxonomic groups—toucans, African barbets, Australian parrots, estrildid finches, Canadian galliforms, penguins, gulls, and terns. Across all species, there were strongly significant relationships between bill length and both latitude and environmental temperature, with species in colder climates having significantly shorter bills. Patterns supporting Allen’s rule in relation to latitudinal or altitudinal distribution held within all groups except the finches. Evidence for a direct association with temperature was found within four groups (parrots, galliforms, penguins, and gulls). Support for Allen’s rule in leg elements was weaker, suggesting that bird bills may be more susceptible to thermoregulatory constraints generally. Our results provide the strongest comparative support yet published for Allen’s rule and demonstrate that thermoregulation has been an important factor in shaping the evolution of bird bills.

Examining the dissociative basis for body image disturbances

Although dissociative symptoms have been linked with both food- and appearance-related aspects of eating disorders, the psychological mechanisms underlying these relationships remain unclear. The present study evaluated the hypothesis that the disturbances of self-identity attributed to dissociation can manifest as disturbances of body image and, in turn, undermine body-specific self-evaluations relevant to disordered eating (i.e., body comparison, body dissatisfaction, and internalization of the thin ideal). Ninety-three female university students completed self-report measures of dissociation and body-related aspects of disordered eating. In addition, the method of constant stimuli was used to experimentally derive three measures of body image disturbance: (1) accuracy of body size estimations (body image distortion), (2) ability to discriminate between different body sizes (body image sensitivity), and (3) consistency in one’s body size estimations (body image variability). The findings show that dissociation is related to symptoms of disordered eating, and that these relationships may be mediated by body image instability. Collectively, these findings support the notion that the body image attitudes and behaviours that characterize eating disorders may derive from proprioceptive deficits due to dissociation.