Intra-genomic conflict and the evolution of sexually selected traits. The dynamics of sexual selection may prevent the simultaneous optimization of traits shared by the sexes, or of different traits within each sex. This proposal focuses on the consequences of these conflicts for phenotypic and genomic evolution. First, I will compare selection acting on a sexually dimorphic trait in males and females. Second, I will use artificial selection to create a novel sexually dimorphic trait, and track ....Intra-genomic conflict and the evolution of sexually selected traits. The dynamics of sexual selection may prevent the simultaneous optimization of traits shared by the sexes, or of different traits within each sex. This proposal focuses on the consequences of these conflicts for phenotypic and genomic evolution. First, I will compare selection acting on a sexually dimorphic trait in males and females. Second, I will use artificial selection to create a novel sexually dimorphic trait, and track the evolutionary response. Third, I will investigate the link between two important fitness traits: body size and ageing rate. This work will enhance important on-going research in the laboratory of Robert Brooks (UNSW).Read moreRead less
How sexually antagonistic genes and sexual selection influence the evolution of the Y chromosome. Sexually antagonistic genes are beneficial to members of one sex, but costly to the other. They are of significance both to the coevolution between the sexes and the evolution of the sex chromosomes. We will measure the sexually antagonistic effects of genes that make male guppies sexually attractive. We will then study how these genes, and the process of sexual selection that favours them influence ....How sexually antagonistic genes and sexual selection influence the evolution of the Y chromosome. Sexually antagonistic genes are beneficial to members of one sex, but costly to the other. They are of significance both to the coevolution between the sexes and the evolution of the sex chromosomes. We will measure the sexually antagonistic effects of genes that make male guppies sexually attractive. We will then study how these genes, and the process of sexual selection that favours them influence the process of recombination between the X and Y chromosomes.Read moreRead less
Putting sexual selection in a life-history context: What is meant by genetic quality? Theories of sexual signalling have been developed largely without reference to life-history theory and quantitative genetics. We will test recent theory that shows the costs of signals are best measured in units of future survival and reproduction. In a series of field and laboratory experiments on the cricket Teleogryllus commodus, we will test the idea that the "male genetic quality" referred to by good-genes ....Putting sexual selection in a life-history context: What is meant by genetic quality? Theories of sexual signalling have been developed largely without reference to life-history theory and quantitative genetics. We will test recent theory that shows the costs of signals are best measured in units of future survival and reproduction. In a series of field and laboratory experiments on the cricket Teleogryllus commodus, we will test the idea that the "male genetic quality" referred to by good-genes models of sexual selection is quality in the general ability to acquire resources, rather than in how resources are allocated among fitness components.Read moreRead less
A new kind of dynamics for psychology. In order to remain efficient in real-world decisions, people must dynamically monitor and adjust their cognitive processes. This project aims to develop innovative methods and analyses for dynamics in experimental psychology, using standard paradigms in which task parameters are dynamically manipulated. The development of models of dynamic behaviour will advance the science of psychology and serve as a practical measurement tool for individuals.
Improving external validity of stated choice experiments. This project aims to deliver more accurate estimates of choice behaviour by reducing biases due to choice task complexity in surveys as well as design artefacts. Extracting 'true' preferences is challenging, not only due to possible hypothetical bias, but also due to increasingly complex choice tasks and the existence of design artefacts. This project will investigate the latter two in the context of marketing, transport, health, and envi ....Improving external validity of stated choice experiments. This project aims to deliver more accurate estimates of choice behaviour by reducing biases due to choice task complexity in surveys as well as design artefacts. Extracting 'true' preferences is challenging, not only due to possible hypothetical bias, but also due to increasingly complex choice tasks and the existence of design artefacts. This project will investigate the latter two in the context of marketing, transport, health, and environmental economics, and proposes new methodologies to extract preferences that more closely reflect true behaviour in real markets.Read moreRead less
Do intentions predict health-related behaviours? Implications of method bias for the design of public health promotion programs. Each year millions of dollars are expended on public health initiatives to encourage healthier lifestyle behaviours, such as diet, exercise, smoking and sun-protection. This project will investigate the cumulative empirical evidence to evaluate the validity of the theories that purport to explain why people behave the way they do.
Molecular force sensing mechanisms of PIEZO channels. The aim of this project is to characterise the gating mechanism of Piezo mechanosensitive ion channels recently identified in animals and humans. Mechanotransduction is ancient, as indicated by the presence of mechanosensitive channels in bacteria where these channels are activated by the bilayer mechanism according to the force-from-lipids paradigm possibly applicable to gating of the Piezo channels as well. Piezo channels play a crucial rol ....Molecular force sensing mechanisms of PIEZO channels. The aim of this project is to characterise the gating mechanism of Piezo mechanosensitive ion channels recently identified in animals and humans. Mechanotransduction is ancient, as indicated by the presence of mechanosensitive channels in bacteria where these channels are activated by the bilayer mechanism according to the force-from-lipids paradigm possibly applicable to gating of the Piezo channels as well. Piezo channels play a crucial role in senses of touch and pain, and mutations in Piezo1 have been shown to cause Xerocytosis – a hereditary genetic disorder manifested in haemolytic anemia. This project aims to help answer fundamental questions in mechanotransduction in vertebrates.Read moreRead less
Exploration, Generalisation and the Development of Learning Traps. This project addresses three fundamental questions about human decision-making; 1) how does exploratory choice lead to “learning traps”, persistent patterns of poor decision-making that cause us to miss rewards and experience losses? 2) how does susceptibility to traps change with age? 3) what strategies prevent traps or facilitate escape? The project will advance our understanding of the cognitive processes underlying adult and ....Exploration, Generalisation and the Development of Learning Traps. This project addresses three fundamental questions about human decision-making; 1) how does exploratory choice lead to “learning traps”, persistent patterns of poor decision-making that cause us to miss rewards and experience losses? 2) how does susceptibility to traps change with age? 3) what strategies prevent traps or facilitate escape? The project will advance our understanding of the cognitive processes underlying adult and child decision-making, using innovative experimental paradigms and computational modeling. Expected outcomes include a novel computational model that explains developmental change in trap formation. The results will guide strategies for improved decision-making in educational, financial, and social settings.Read moreRead less
The value of time during decisions. This project aims to investigate how people value time during decision making. Using an innovative combination of carefully designed experiments and state-of-the-art mathematical cognitive models, this project expects to generate new knowledge regarding how efficiently people allocate time when making decisions, the factors that allow people to perform optimally and those that lead to suboptimal performance. The anticipated outcome of the project is a new fram ....The value of time during decisions. This project aims to investigate how people value time during decision making. Using an innovative combination of carefully designed experiments and state-of-the-art mathematical cognitive models, this project expects to generate new knowledge regarding how efficiently people allocate time when making decisions, the factors that allow people to perform optimally and those that lead to suboptimal performance. The anticipated outcome of the project is a new framework for understanding the optimality of human decision making. This outcome has the potential benefit of providing insight into decision mechanisms across a range of contexts, particularly ageing and models of applied decision making.Read moreRead less
Nanotechnology in nature: the evolutionary significance of iridescent ultraviolet colouration in butterflies. Nanostructural colour is a novel and interesting biological phenomenon that has potential application in textile and paint industries. This research has the potential to uncover knowledge relevant to future genetic manipulation and/or artificial synthesis of this trait for industry. Fundamental benefits will include a contribution to our understanding of evolution and biological diversit ....Nanotechnology in nature: the evolutionary significance of iridescent ultraviolet colouration in butterflies. Nanostructural colour is a novel and interesting biological phenomenon that has potential application in textile and paint industries. This research has the potential to uncover knowledge relevant to future genetic manipulation and/or artificial synthesis of this trait for industry. Fundamental benefits will include a contribution to our understanding of evolution and biological diversity, enhancement of Australia's research profile, and the cultivation of new scientific expertise. This proposal also promises to benefit the Australian scientific community through the establishment of collaborative links with universities in the USA and UK, and to increase mainstream awareness of Australia's stunning natural resources.Read moreRead less