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Influence of energy intake on reproduction. Understanding reproduction is fundamentally important to ecology and conservation. Despite intensive research, the processes that regulate energy acquisition and allocation for reproduction are still unclear for most animal species. Many of the obstacles to progress in this field of research are logistical, reflecting the complexity and temporal overlap of significant components of energy allocation pathways. Our proposed study avoids many of these l ....Influence of energy intake on reproduction. Understanding reproduction is fundamentally important to ecology and conservation. Despite intensive research, the processes that regulate energy acquisition and allocation for reproduction are still unclear for most animal species. Many of the obstacles to progress in this field of research are logistical, reflecting the complexity and temporal overlap of significant components of energy allocation pathways. Our proposed study avoids many of these logistical difficulties by focusing on animals (snakes) that display clear temporal partitioning between successive segments of the reproductive cascade (i.e., vitellogenesis, ovulation, embryogenesis); and by adopting a simple but novel method (based on stable isotope analysis) to tease apart the relationship between energy acquisition and energy expenditure in different phases of the animal's life-history.Read moreRead less
The routes of infection with sheep scrapie and agents that cause related prion diseases. We will define the routes by which the infective agents for scrapie, a debilitating disease of sheep, reach the nervous system after being consumed with food. Scrapie is from the same disease group (prion diseases) as mad cow disease. There would be a large economic cost were prion diseases to infect agricultural animals in Australia, through bioterrorism or accident. An outbreak in sheep could ruin the indu ....The routes of infection with sheep scrapie and agents that cause related prion diseases. We will define the routes by which the infective agents for scrapie, a debilitating disease of sheep, reach the nervous system after being consumed with food. Scrapie is from the same disease group (prion diseases) as mad cow disease. There would be a large economic cost were prion diseases to infect agricultural animals in Australia, through bioterrorism or accident. An outbreak in sheep could ruin the industry, as our export markets would be immediately blocked, and thousands of animals would be killed to stop disease spread. The benefit of clearly understanding how the infective agents reach the nervous system is that this may lead to strategies to intervene, and thus limit the spread and seriousness of infection.Read moreRead less
Race and gender stereotypes on the brain: The case of emotion expression. Australia is a multicultural, multiethnic society in which people from different backgrounds interact every day. Successful interaction among persons from different backgrounds requires a mutual understanding of the manner in which emotions are expressed and perceived as emotions are a central part of any interaction. The current project will investigate whether there are systematic biases in the manner in which emotions ....Race and gender stereotypes on the brain: The case of emotion expression. Australia is a multicultural, multiethnic society in which people from different backgrounds interact every day. Successful interaction among persons from different backgrounds requires a mutual understanding of the manner in which emotions are expressed and perceived as emotions are a central part of any interaction. The current project will investigate whether there are systematic biases in the manner in which emotions are expressed and perceived within and across ethnic groups. It will rely on objective indices to achieve this aim, measures of the electrical activity of the brain. Read moreRead less
The evolutionary effect of the domestication process in a model organism. A significant proportion of research in the field of evolutionary biology, focuses on captive populations of laboratory-bred animals. Little is known about the impact of the domestication process on these species, raising questions about the relevance of such studies. The Australian zebra finch is the avian model species of choice in evolutionary biology laboratories in Europe and the USA and the focus of many high profile ....The evolutionary effect of the domestication process in a model organism. A significant proportion of research in the field of evolutionary biology, focuses on captive populations of laboratory-bred animals. Little is known about the impact of the domestication process on these species, raising questions about the relevance of such studies. The Australian zebra finch is the avian model species of choice in evolutionary biology laboratories in Europe and the USA and the focus of many high profile publications. Our investigation into the affect of domestication on the evolutionary biology of this key model species will have a high international impact, raising the profile of Australian research, in addition to providing fundamental knowledge across several areas of reproductive biology.Read moreRead less
Comparative studies of invasive plants: a leaf carbon strategy approach. Invasion of communities by exotic plants is a significant threat to biodiversity globally. This proposal is to strengthen collaborative links between the Plant Invasion Research Laboratories of Leishman in Australia and Richardson in South Africa. Their current research seeks to understand strategies of invasive plants in novel environments using the framework of leaf carbon strategies. Australian plants invasive in South A ....Comparative studies of invasive plants: a leaf carbon strategy approach. Invasion of communities by exotic plants is a significant threat to biodiversity globally. This proposal is to strengthen collaborative links between the Plant Invasion Research Laboratories of Leishman in Australia and Richardson in South Africa. Their current research seeks to understand strategies of invasive plants in novel environments using the framework of leaf carbon strategies. Australian plants invasive in South Africa and South African plants invasive in Australia provide an ideal model system. This collaborative research will enable better prediction of potential invaders, as well as providing important input for models of plant, ecosystem and biosphere responses to global change incorporating invasion dynamics.Read moreRead less
Anti-ageing role for relaxin in blood vessels. Arteries stiffen with age. This is due to increased arterial smooth muscle tone and alterations in the extracellular matrix. In a sense, the artery undergoes ?fibrosis? with aging. In light of the anti-fibrotic attributes of the peptide hormone relaxin observed in other tissues, this collaborative project will investigate the potential role for relaxin in opposing arterial ?fibrosis? associated with aging. We will test the hypothesis that a reductio ....Anti-ageing role for relaxin in blood vessels. Arteries stiffen with age. This is due to increased arterial smooth muscle tone and alterations in the extracellular matrix. In a sense, the artery undergoes ?fibrosis? with aging. In light of the anti-fibrotic attributes of the peptide hormone relaxin observed in other tissues, this collaborative project will investigate the potential role for relaxin in opposing arterial ?fibrosis? associated with aging. We will test the hypothesis that a reduction in arterial relaxin expression in older animals is a major cause of arterial stiffening. Further studies will investigate the mechanisms by which relaxin administration can alleviate this phenomenon.Read moreRead less
Impacts of changing detrital source biodiversity on estuarine ecosystems. Coastal development, invasive pests, and climate change are impacting abundances of estuarine aquatic plants. This in turn is affecting the composition and magnitude of detrital enrichment, threatening biodiversity, fisheries production and endangered birds. Our pioneering research will forecast the impacts of changing detrital-source biodiversity on soft-sediment communities and the food webs they support in Australia and ....Impacts of changing detrital source biodiversity on estuarine ecosystems. Coastal development, invasive pests, and climate change are impacting abundances of estuarine aquatic plants. This in turn is affecting the composition and magnitude of detrital enrichment, threatening biodiversity, fisheries production and endangered birds. Our pioneering research will forecast the impacts of changing detrital-source biodiversity on soft-sediment communities and the food webs they support in Australia and the USA. Ecological generalities obtained can be used to support policy development that ensures sustainable management of estuaries. This work will also facilitate training of early career researchers and focus research efforts of leading US researchers towards issues crucial for Australian estuarine management.Read moreRead less
Understanding fungal diversity and functioning in forest soils using molecular and stable isotope approaches. The project aims to investigate fungal community structure and functioning in forest soils using novel molecular, stable isotope and physiological approaches. This will provide new insights into the linkage between diversity and functioning in forest soil fungal communities and the importance of these organisms in ecosystem processes. In addition, this pioneering research will facilitate ....Understanding fungal diversity and functioning in forest soils using molecular and stable isotope approaches. The project aims to investigate fungal community structure and functioning in forest soils using novel molecular, stable isotope and physiological approaches. This will provide new insights into the linkage between diversity and functioning in forest soil fungal communities and the importance of these organisms in ecosystem processes. In addition, this pioneering research will facilitate development and refinement of methodologies that will pave the way for future investigations of fungal ecology. The on-going collaboration will produce high quality joint publications and provide significant opportunities for early career researchers to gain international experience in a dynamic research environment.Read moreRead less
Biased information processing in anxiety: Low anxiety scores, but still at risk. Information processing in anxious persons is biased if confronted with threatening stimulus materials such as words or pictures. This finding has considerable implications for our understanding of fear acquisition and maintenance and for the design of therapeutic interventions. More recent research has shown, however, that low anxious persons who employ repressive coping styles show similar biases. The present proj ....Biased information processing in anxiety: Low anxiety scores, but still at risk. Information processing in anxious persons is biased if confronted with threatening stimulus materials such as words or pictures. This finding has considerable implications for our understanding of fear acquisition and maintenance and for the design of therapeutic interventions. More recent research has shown, however, that low anxious persons who employ repressive coping styles show similar biases. The present project will follow up on these findings by combining the expertises of the two CIs in contemporary cognitive and psychophysiological research. It will not only provide new insights, but also offer research opportunities for postgraduate students, and prospects for future collaborative funding.Read moreRead less
Long-term natural ecological consequences of disturbance on coral reefs: the benthic foraminifera perspective. The tropical coastline of Australia encompasses world-renowned coral reefs (Great Barrier Reef and Ningaloo Marine Park). Even these reefs are not pristine and are increasingly susceptible to disturbance from human impact. The long-term ecological effects of disturbance on reef communities cannot be experimentally determined; but natural experiments from the fossil record provide mech ....Long-term natural ecological consequences of disturbance on coral reefs: the benthic foraminifera perspective. The tropical coastline of Australia encompasses world-renowned coral reefs (Great Barrier Reef and Ningaloo Marine Park). Even these reefs are not pristine and are increasingly susceptible to disturbance from human impact. The long-term ecological effects of disturbance on reef communities cannot be experimentally determined; but natural experiments from the fossil record provide mechanisms to ensure that managers of Australia's reefs have critical information on how past disturbance frequency and intensity has affected coral reef communities. This information will help ensure the continuation of ecosystem goods and services from Australia's high diversity coral reefs.Read moreRead less