Revisiting the 'Fourth Age': health, socioeconomic and cultural transformation of, and diversity in, Australia's oldest old population, 1981-2011. The oldest-old (those aged 85 years and over) is the fastest growing segment of the Australian population, and the changing make-up and experiences of this group needs attention. This project will expand our knowledge base about Australia's oldest old, helping to inform public policy and to improve discussions on what the 'Fourth Age' really means in ....Revisiting the 'Fourth Age': health, socioeconomic and cultural transformation of, and diversity in, Australia's oldest old population, 1981-2011. The oldest-old (those aged 85 years and over) is the fastest growing segment of the Australian population, and the changing make-up and experiences of this group needs attention. This project will expand our knowledge base about Australia's oldest old, helping to inform public policy and to improve discussions on what the 'Fourth Age' really means in Australia.Read moreRead less
Understanding how reproduction and sexual conflict drive sex-dependent longevity and ageing. The biological study of longevity and ageing has two important fronts: understanding how evolution shapes lifespan and ageing, and the mechanistic study of how molecules, genes, hormones, tissues and cells interact during ageing. The evolutionary study of ageing is considered one of the success stories of the emerging field of evolutionary medicine, yet we desperately need greater integration of the evol ....Understanding how reproduction and sexual conflict drive sex-dependent longevity and ageing. The biological study of longevity and ageing has two important fronts: understanding how evolution shapes lifespan and ageing, and the mechanistic study of how molecules, genes, hormones, tissues and cells interact during ageing. The evolutionary study of ageing is considered one of the success stories of the emerging field of evolutionary medicine, yet we desperately need greater integration of the evolutionary and mechanistic spheres. This project addresses why males and females have different lifespans and age differently in a way that bridges evolutionary and mechanistic study, and will build Australia's research capacity to study ageing at both levels. Read moreRead less
Why do good males die young? The relationship between ageing and sexual selection. A biological understanding of ageing is directly relevant to human welfare. We will use lab and field studies to explore the evolutionary genetics of ageing in an Australian cricket, with particular emphasis on how diet and the timing of reproduction influence the rate at which crickets deteriorate with age. We will also test whether biological differences between males and females generate genetic conflicts over ....Why do good males die young? The relationship between ageing and sexual selection. A biological understanding of ageing is directly relevant to human welfare. We will use lab and field studies to explore the evolutionary genetics of ageing in an Australian cricket, with particular emphasis on how diet and the timing of reproduction influence the rate at which crickets deteriorate with age. We will also test whether biological differences between males and females generate genetic conflicts over ageing rates. Our results will not only complement an evolutionary study of ageing, but may ultimately suggest interventions that may prolong human life or improve the quality of life in an ageing population.Read moreRead less
Linking the evolutionary and bioenergetic causes of sex differences in lifespan and ageing. The biological study of longevity and ageing has two important fronts: understanding how evolution shapes lifespan and ageing, and the mechanistic study of how genes, hormones, tissues and cells interact during ageing. Interventions to prolong longevity and improve quality of life depend on a vigorous and innovative research effort in both spheres. This project addresses why males and females have differe ....Linking the evolutionary and bioenergetic causes of sex differences in lifespan and ageing. The biological study of longevity and ageing has two important fronts: understanding how evolution shapes lifespan and ageing, and the mechanistic study of how genes, hormones, tissues and cells interact during ageing. Interventions to prolong longevity and improve quality of life depend on a vigorous and innovative research effort in both spheres. This project addresses why males and females have different lifespans and age differently in a way that bridges evolutionary and mechanistic study, and will build Australia's research capacity to study ageing at both levels. Because of the human interest in diet, sex, reproduction and ageing, we expect this research will be a showcase for public interest in science.Read moreRead less
The role of sexual conflict in the evolution of lifespan and ageing. Despite the central importance of ageing in our own lives, our understanding of the evolution of ageing is still incomplete. Reproductive interests of males and females often diverge, resulting in sexual conflict which may in turn drive the evolution of rapid ageing. I will use experimental evolution to investigate the role of sexual conflict in the evolution of age-specific mortality, reproductive ageing and lifespan in the se ....The role of sexual conflict in the evolution of lifespan and ageing. Despite the central importance of ageing in our own lives, our understanding of the evolution of ageing is still incomplete. Reproductive interests of males and females often diverge, resulting in sexual conflict which may in turn drive the evolution of rapid ageing. I will use experimental evolution to investigate the role of sexual conflict in the evolution of age-specific mortality, reproductive ageing and lifespan in the seed beetle Callosobruchus maculates. This study will reveal the role of sexual interactions and reproduction in the ageing process and result in the development of important new resources for resolving the genetic basis of deteriorative ageing.Read moreRead less
The Weight of Modernity: Mitigating Obesity. Health scientists have warned about the implications to the nation's health if the rise in obesity continues as is predicted and the National Obesity Taskforce puts the cost of obesity at $1.3 billion per year. The Taskforce recognises the need to "address the broader social and environmental determinants of poor nutrition and sedentary lifestyles". By analysing the multiple social trends contributing to the rise of obesity and another major disease o ....The Weight of Modernity: Mitigating Obesity. Health scientists have warned about the implications to the nation's health if the rise in obesity continues as is predicted and the National Obesity Taskforce puts the cost of obesity at $1.3 billion per year. The Taskforce recognises the need to "address the broader social and environmental determinants of poor nutrition and sedentary lifestyles". By analysing the multiple social trends contributing to the rise of obesity and another major disease of the twentieth century (CHD), we will highlight the barriers and opportunities that must be acknowledged in order to mitigate obesity, particularly in disadvantaged populations.Read moreRead less
Population dynamics and genetic variation of plants with contrasting fire responses. We combine the traditional concerns of population viability analyses with the modern techniques of DNA fingerprinting for precise genotyping of individual plants and their seeds. We expect major breakthroughs in our understanding of how fire-killed species have survived thousands of years of frequent burning by Aborigines (by identifying seeds dispersed long distances from burnt parents); how paternity of offspr ....Population dynamics and genetic variation of plants with contrasting fire responses. We combine the traditional concerns of population viability analyses with the modern techniques of DNA fingerprinting for precise genotyping of individual plants and their seeds. We expect major breakthroughs in our understanding of how fire-killed species have survived thousands of years of frequent burning by Aborigines (by identifying seeds dispersed long distances from burnt parents); how paternity of offspring changes over the lifespan of plants which retain their seeds for many years; at what age within-plant genetic variation is at a maximum as a guide to optimal fire management; and the extent that deleterious somatic mutations explain low seed set among long-lived species.Read moreRead less
Boosting brain plasticity and motor function in older adults. Ageing is associated with a pronounced decline in many motor, cognitive, and other brain functions, but the cause remains elusive. This project will examine the mechanisms that contribute to a decline in brain plasticity and motor function in the elderly. Using novel brain stimulation techniques, the project aims to develop an optimal approach to boost plasticity in the ageing brain and improve motor function. A better understanding o ....Boosting brain plasticity and motor function in older adults. Ageing is associated with a pronounced decline in many motor, cognitive, and other brain functions, but the cause remains elusive. This project will examine the mechanisms that contribute to a decline in brain plasticity and motor function in the elderly. Using novel brain stimulation techniques, the project aims to develop an optimal approach to boost plasticity in the ageing brain and improve motor function. A better understanding of changes in brain function and plasticity with advancing age is expected to help to optimise the design of preventative programs aimed at rejuvenating motor and cognitive function in the elderly.Read moreRead less
Sex, parthenogenesis and adaptation: a novel laboratory 'natural selection' experiment testing the adaptive significance of sexual and asexual reproduction. One of the greatest challenges for evolutionary biology is explaining the widespread occurrence of sexual reproduction. Many theoretical models show some inherent benefits of sex, however these models make assumptions that little or no empirical data exists for. Using a novel phenomenon found in the parasitoid wasp genus Trichogramma, I will ....Sex, parthenogenesis and adaptation: a novel laboratory 'natural selection' experiment testing the adaptive significance of sexual and asexual reproduction. One of the greatest challenges for evolutionary biology is explaining the widespread occurrence of sexual reproduction. Many theoretical models show some inherent benefits of sex, however these models make assumptions that little or no empirical data exists for. Using a novel phenomenon found in the parasitoid wasp genus Trichogramma, I will investigate the adaptive significance of sexual and asexual reproduction in a laboratory natural selection experiment and therefore directly test the theory for the evolution and maintenance of sex. This will be the first such test in a higher organism.Read moreRead less
Episodic foresight and ageing. Episodic foresight refers to the capacity to imagine future events, and consequently often involves the prediction of future needs based on hypothesised possible outcomes. It is therefore unsurprising that episodic foresight has been consistently linked to independent living and many functional behaviours. The aim of the project is to test the hypothesis that psychological changes brought about by ageing decrease the likelihood of acting prudently with the future i ....Episodic foresight and ageing. Episodic foresight refers to the capacity to imagine future events, and consequently often involves the prediction of future needs based on hypothesised possible outcomes. It is therefore unsurprising that episodic foresight has been consistently linked to independent living and many functional behaviours. The aim of the project is to test the hypothesis that psychological changes brought about by ageing decrease the likelihood of acting prudently with the future in mind. By advancing conceptual understanding of how, and under what circumstances, episodic foresight is affected in late adulthood, the proposed research has important implications for finding ways to help older adults maintain a productive and independent life. Read moreRead less