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Relationship of retinal directionality to human retinal anatomy variations. This project aims to improve measurement of retinal directionality, which is the reduction in brightness when a light beam’s entry into the human eye is shifted from the centre to the edge of the pupil. This influences retinal image quality and can be used to measure changes in shape of the peripheral eye. This project will apply advanced technologies in holography, and heads-up displays to explore how retinal directiona ....Relationship of retinal directionality to human retinal anatomy variations. This project aims to improve measurement of retinal directionality, which is the reduction in brightness when a light beam’s entry into the human eye is shifted from the centre to the edge of the pupil. This influences retinal image quality and can be used to measure changes in shape of the peripheral eye. This project will apply advanced technologies in holography, and heads-up displays to explore how retinal directionality changes during accommodation (focusing). The expected outcome is improved understanding of retinal stretching changes during focusing. The benefit is that the project will lead to advancements in retinal imaging.Read moreRead less
Using visual science to reduce the dangers of night driving. This project aims to develop novel tests of visual function relevant to the modern night driving environment. Night driving is challenging for all drivers and has been linked to poor visibility under low light conditions. This project will characterise the visual challenges of the modern night driving environment, develop visual tests that incorporate the dynamic light levels typical of night-time roads and assess the association of th ....Using visual science to reduce the dangers of night driving. This project aims to develop novel tests of visual function relevant to the modern night driving environment. Night driving is challenging for all drivers and has been linked to poor visibility under low light conditions. This project will characterise the visual challenges of the modern night driving environment, develop visual tests that incorporate the dynamic light levels typical of night-time roads and assess the association of these tests with night driving performance. The outcomes will contribute new knowledge regarding dynamic visual processing and the ageing visual system and will inform vision testing, potential interventions to improve visual function for night driving and reduce the dangers of night driving.Read moreRead less
Promoting engagement with life in older adulthood. This project aims to examine engagement in meaningful activities among older adults. Increasing older adults' engagement could promote direct benefits for social integration, well-being and better quality of life. The project is expected to generate new knowledge on programs that effectively promote engagement, as well as evaluating a new tailored approach to promoting engagement that aligns with individuals' unique strengths, capabilities and ....Promoting engagement with life in older adulthood. This project aims to examine engagement in meaningful activities among older adults. Increasing older adults' engagement could promote direct benefits for social integration, well-being and better quality of life. The project is expected to generate new knowledge on programs that effectively promote engagement, as well as evaluating a new tailored approach to promoting engagement that aligns with individuals' unique strengths, capabilities and values. The findings aim to provide benefits for community organisations and aged care service providers adopting innovative approaches to promoting ageing well.
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Ultrafast tracking of physiological processes in the human eye. Recent developments in high-resolution imaging allow individual cells in the living eye to be studied at very high speeds. This project aims to explore a new class of scientific observations of rapid phenomena including: the capture and conversion of light energy to electrical energy, the spread of pressure waves through delicate networks of blood vessels, and fast eye movements used to navigate the visual scene. This project expect ....Ultrafast tracking of physiological processes in the human eye. Recent developments in high-resolution imaging allow individual cells in the living eye to be studied at very high speeds. This project aims to explore a new class of scientific observations of rapid phenomena including: the capture and conversion of light energy to electrical energy, the spread of pressure waves through delicate networks of blood vessels, and fast eye movements used to navigate the visual scene. This project expects to generate new knowledge about these processes using state of the art technology, to reveal more about how the eye and visual system work. Our novel measures of physiological function will offer significant future benefit in the early diagnosis and treatment of disorders occurring at the cellular level.Read moreRead less
There are many challenges to the management of sleep disorders. There is mounting evidence that sleep problems promote impaired memory and thinking and ultimately dementia. My research will focus on improving detection and management of sleep disorders using cutting edge technologies in different patient groups with the aim of maximising brain health. This will be achieved by a range of new treatments including clinical trials, digital health approaches and new ways of improving deep sleep.
Discovery Early Career Researcher Award - Grant ID: DE150101180
Funder
Australian Research Council
Funding Amount
$362,000.00
Summary
The neuroethics of cognitive ageing. As the workforce ages, Australian and international governments are prioritising brain health, seeking to increase economic productivity and reduce the costs of age-related cognitive decline. In addition to healthy lifestyle habits, certain neurotechnologies are being promoted as the means to protect cognitive performance. This project aims to explore the ethical issues and social pressures that ageing individuals experience as a result of cognitive ageing. U ....The neuroethics of cognitive ageing. As the workforce ages, Australian and international governments are prioritising brain health, seeking to increase economic productivity and reduce the costs of age-related cognitive decline. In addition to healthy lifestyle habits, certain neurotechnologies are being promoted as the means to protect cognitive performance. This project aims to explore the ethical issues and social pressures that ageing individuals experience as a result of cognitive ageing. Understanding later life from the perspective of ageing individuals may enable society to meet the ethical and policy challenges raised by emphasising cognitive wellbeing above other aspects in the ageing process.Read moreRead less
Understanding Ageism in Australia. Ageism refers to stereotypes, prejudice and discrimination towards people based on their age. This project aims to generate new knowledge in relation to older Australians’ experiences of ageism by conducting a population-based survey of ageism and examining its links with mental health and wellbeing. The project will also use intensive longitudinal methods to study everyday ageism. Expected outcomes include identification of at-risk groups that can be used to i ....Understanding Ageism in Australia. Ageism refers to stereotypes, prejudice and discrimination towards people based on their age. This project aims to generate new knowledge in relation to older Australians’ experiences of ageism by conducting a population-based survey of ageism and examining its links with mental health and wellbeing. The project will also use intensive longitudinal methods to study everyday ageism. Expected outcomes include identification of at-risk groups that can be used to inform government policy responses to tackling ageism and will inform the development of interventions and education programs to reduce ageism in the community. This should provide significant benefits for social inclusion, intergenerational solidarity and economic participation Read moreRead less
Remembering to remember: Prospective memory function in everyday life. Prospective memory is a core cognitive skill that refers to memory for future intentions. The goal of this project is to establish when, why and how real-life prospective memory function breaks down at different stages of the adult lifespan and in different everyday contexts - and what strategies most effectively prevent this from occurring. In doing so, this project expects to deliver knowledge that is theoretically transfor ....Remembering to remember: Prospective memory function in everyday life. Prospective memory is a core cognitive skill that refers to memory for future intentions. The goal of this project is to establish when, why and how real-life prospective memory function breaks down at different stages of the adult lifespan and in different everyday contexts - and what strategies most effectively prevent this from occurring. In doing so, this project expects to deliver knowledge that is theoretically transformative, and that delivers the practical understanding of what can be done to reduce real-life vulnerability to prospective memory failures. Given that lapses of prospective memory account for more than half of all daily cognitive errors, this should provide important social and economic benefits for all Australians.
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Suboptimal Sleep And Unhealthy Brain Ageing: Improving Outcomes Through Treatment
Funder
National Health and Medical Research Council
Funding Amount
$632,705.00
Summary
My research will address limitations in our understanding of the impact of sleep characteristics on memory and thinking abilities and biological markers of brain health in older adults, by; 1) exploring these relationships over time, and 2) enabling direct assessment of the effect of improved sleep on memory and thinking, and markers of brain health, following sleep-improvement therapy. My results will contribute to the development of strategies aimed at promoting healthy brain ageing.
Developing And Validating Novel Methods To Estimate Age- And Size-at-maturity In South Eastern Australian Fisheries
Funder
Fisheries Research and Development Corporation
Funding Amount
$348,420.00
Summary
We submit this EOI to the priority ‘Biological parameters for stock assessments in South Eastern Australia – a information and capacity uplift’
Empirical observations from around the world have shown that intense fisheries harvest and oceanic warming can both lead to individuals reaching sexual maturity at younger ages and smaller sizes (Waples and Audzijonyte 2016). We know that younger and smaller mothers produce fewer eggs that may be of poorer quality than those from older and lar ....We submit this EOI to the priority ‘Biological parameters for stock assessments in South Eastern Australia – a information and capacity uplift’
Empirical observations from around the world have shown that intense fisheries harvest and oceanic warming can both lead to individuals reaching sexual maturity at younger ages and smaller sizes (Waples and Audzijonyte 2016). We know that younger and smaller mothers produce fewer eggs that may be of poorer quality than those from older and larger mothers (Barneche et al. 2018). Further, young mothers often need to build up their energy reserves before spawning each year, meaning that they experience a constrained spawning season. A shorter spawning window reduces the likelihood that their offspring will encounter an environment favourable for growth and survival (Wright and Gibb 2005). Harvest-induced declines in age and size at maturity have, for example, been implicated as one of the main drivers underpinning the collapse of Canadian Atlantic cod stocks (Hutchings and Rangeley 2011).
Environmental stress can also lead to poorer conditioned fish that lack the resources to spawn at all. The prevalence of ‘skip spawning’, as it is known, is hard to ascertain in wild populations but could be as high as 30% of the sexually mature biomass in some years (Rideout and Tomkiewicz 2011). Earlier maturity and skip spawning both have the potential to significantly impact on the biomass of sexually mature individuals in a stock and overall levels of recruitment success. Failure to properly account for these reproductive phenomena can lead to significant under- or over-estimation of SSB, which in turn leads to ineffective management advice that may heighten the risk of stock decline, unnecessarily limit catches, or impede stock recovery.
The rapid warming of southeast Australian waters has already been implicated in driving significant increases in the juvenile growth rates of harvested species, including tiger flathead, redfish and jackass morwong (Thresher et al. 2007, Morrongiello and Thresher 2015). It is plausible that these growth changes (predicted by eco-physiological theory, Atkinson 1994) are linked to commensurate, yet unknown, declines in age and size at maturity. Further, warmer waters may be stressing spawning adults (Portner and Farrell 2008), leading to an increased prevalence of skip spawning in southeast Australian fishes. Importantly, in recent times the biomass of several SESSF species has failed to recover despite significant management intervention. There is a real and pressing need to update the maturity parameters used in assessment models to reduce uncertainty in stock projections.
Our two-part project will refine and validate novel otolith-based methods to estimate an individual’s age at maturity and spawning dynamics from information naturally recorded in its otolith, and then apply this to existing otolith collections. AFMA already invests significant resources into the routine collection of otoliths for ageing purposes. In Part One of our project, we propose to value-add to these existing monitoring programs by developing new maturity and spawning assays that can be readily integrated into stock assessments to reduce model uncertainty and improve harvest strategies (FRDC strategic outcome 2 & 4), in turn bolstering community trust in projections (FRDC strategic outcome 5). In Part Two of our project, we will develop unprecedented insight into the reproductive history of SESSF stocks by recreating time series of maturity using archived otoliths that are currently sitting idle in storage.
Postgraduate students and early career researchers will play a central role in the development and delivery of our project. This experience will help provide a clear pathway for graduates into fisheries science. Our project will bolster the capacity and capability of fish ageing laboratories across Australia to deliver improved monitoring services to fisheries managers (FRDC enabling strategy IV).
More generally, we believe that our novel maturity and spawning assays have the potential to impact on fisheries assessment in other jurisdictions across the world that experience the same time and cost impediments we face here in Australia. Perhaps most excitingly, our assays have the potential to provide much needed maturity information to data poor and emerging fisheries across the Info-Pacific region using information in already collected otoliths.
References Atkinson, D. 1994. Temperature and organism size: a biological law for ectotherms? Advances in ecological research 25:1-58. Barneche, D. R., D. R. Robertson, C. R. White, and D. J. Marshall. 2018. Fish reproductive-energy output increases disproportionately with body size. Science 360:642-645. Hutchings, J. A., and R. W. Rangeley. 2011. Correlates of recovery for Canadian Atlantic cod (Gadus morhua). Canadian Journal of Zoology 89:386-400. Morrongiello, J. R., and R. E. Thresher. 2015. A statistical framework to explore ontogenetic growth variation among individuals and populations: a marine fish example. Ecological Monographs 85:93-115. Portner, H. O., and A. P. Farrell. 2008. Physiology and climate change. Science 322:690-692. Rideout, R. M., and J. Tomkiewicz. 2011. Skipped spawning in fishes: more common than you might think. Marine and Coastal Fisheries 3:176-189. Thresher, R. E., J. A. Koslow, A. K. Morison, and D. C. Smith. 2007. Depth-mediated reversal of the effects of climate change on long-term growth rates of exploited marine fish. Proc. Natl. Acad. Sci. U.S.A. 104:7461-7465. Waples, R. S., and A. Audzijonyte. 2016. Fishery-induced evolution provides insights into adaptive responses of marine species to climate change. Front. Ecol. Environ. 14:217-224. Wright, P. J., and F. M. Gibb. 2005. Selection for birth date in North Sea haddock and its relation to maternal age. Journal of Animal Ecology 74:303-312.
Objectives: 1. Refinement and validation of three methods to estimate the maturity and spawning history of SESSF species, using information naturally archived in fish otoliths 2. Identification of an accurate and cost-effective method to estimate fish age at maturity and spawning history from their otoliths 3. Recreation of the maturity and spawning history of a SESSF species using one of our three novel assays 4. Quantification of how rapid ocean warming and harvest have affected the expression of age at maturity and the propensity of a SESSF species to skip spawn Read moreRead less