Can inbreeding avoidance cause the evolution of sex-biased dispersal? This project aims to combine unique long-term data with a novel Citizen Science approach to seek to provide the first complete test of the hypothesis that inbreeding avoidance can cause one of the best known patterns in mammal and bird societies - sex differences in when and how far juveniles disperse. Dispersal is a critically important ecological and evolutionary process, as it influences the fate of populations, and also de ....Can inbreeding avoidance cause the evolution of sex-biased dispersal? This project aims to combine unique long-term data with a novel Citizen Science approach to seek to provide the first complete test of the hypothesis that inbreeding avoidance can cause one of the best known patterns in mammal and bird societies - sex differences in when and how far juveniles disperse. Dispersal is a critically important ecological and evolutionary process, as it influences the fate of populations, and also determines the individuals with which a disperser will spend the remainder of its life. It therefore shapes the likelihood that kin will interact to cooperate or compete, and determines the pool of individuals with which the disperser can mate.Read moreRead less
Discovery Early Career Researcher Award - Grant ID: DE130100174
Funder
Australian Research Council
Funding Amount
$375,000.00
Summary
Family matters: kin selection and competition in cooperative breeders. In the absence of dispersal of one or both sexes kin competition and inbreeding are expected to increase. This project will study group living fairy-wrens, which vary in whether or not one sex disperses. The results will shed new light on how species overcome the negative aspects of this behaviour and inform us about the consequences for populations and habitat management.
Discovery Early Career Researcher Award - Grant ID: DE170101193
Funder
Australian Research Council
Funding Amount
$372,000.00
Summary
Testing models for sex evolution and maintenance. This project aims to study the evolution of sex. The short-term costs of sexual reproduction seem to outweigh its benefits, making its widespread success an evolutionary conundrum. The project will test high-profile models which predict higher rates of sex in individuals poorly adapted to their environment than in well adapted individuals. This process allows sex genes to escape from unfavourable genetic backgrounds and hastens local adaptation o ....Testing models for sex evolution and maintenance. This project aims to study the evolution of sex. The short-term costs of sexual reproduction seem to outweigh its benefits, making its widespread success an evolutionary conundrum. The project will test high-profile models which predict higher rates of sex in individuals poorly adapted to their environment than in well adapted individuals. This process allows sex genes to escape from unfavourable genetic backgrounds and hastens local adaptation of populations to their environment. This work is expected to discover the link between reproductive mode and adaptation, strengthen research into consequences of environmental change, and solve a long-standing puzzle of evolutionary biology.Read moreRead less
Discovery Early Career Researcher Award - Grant ID: DE120102323
Funder
Australian Research Council
Funding Amount
$375,000.00
Summary
How the visual environment affects the diversity of avian colours and why this matters. Evolutionary theory predicts that (a) animal colours are optimised to perform best in their native environment and hence that (b) environmental degradation can disrupt the function of animal colours in communication or camouflage. This project will test these predictions for Australian birds and use the outcome to inform environmental restoration programs.
The danger within: assessing the threats to an endangered finch from genetic incompatibility, limited dispersal and effective population size. The Gouldian finch has declined dramatically over the past half century and remains one of Australia's most threatened birds. This project will use some cutting edge genetic techniques to understand some of the processes that undermine the species' recovery and our ability to monitor current populations.
The evolution of cooperative communication. This interdisciplinary project will provide a broad understanding of communication in a model ecological system involving ants, lycaenid butterflies, and host-plants. The project will reveal the nature of the chemical signals used to communicate, and their role in the origin, maintenance, and loss of mutualistic and parasitic associations.
Evolution of anisogamy and the sexes. This project aims to study the evolution of anisogamy, which defines males and females by the size of their gametes – females’ large eggs and males’ small sperm. Most multicellular organisms have different sized gametes, and this size difference has affected the evolution of life on the planet. Theoretical arguments about why two sexes are ubiquitous have not been tested empirically, mainly because of technical difficulties in experimentally generating diffe ....Evolution of anisogamy and the sexes. This project aims to study the evolution of anisogamy, which defines males and females by the size of their gametes – females’ large eggs and males’ small sperm. Most multicellular organisms have different sized gametes, and this size difference has affected the evolution of life on the planet. Theoretical arguments about why two sexes are ubiquitous have not been tested empirically, mainly because of technical difficulties in experimentally generating different sized gametes. This project will use algae and cell sorting technology to test this. The expected outcome is a greater understanding of how and why the sexes evolved, as well as developing biofuel production methods by paving the way for improvements in algal productivity.Read moreRead less
How males alter their mates' ageing rates and lifespans. The proposed project investigates how males affect the lifespan, ageing and subsequent reproduction of their mates. It seeks to draw on and adapt tools and approaches used in molecular genetics and physiology to test predictions from evolutionary theories of sexual conflict, life-histories and ageing in an organism of biomedical and ecological significance, the house mouse. It is expected that this approach will allow the study, in unsurpa ....How males alter their mates' ageing rates and lifespans. The proposed project investigates how males affect the lifespan, ageing and subsequent reproduction of their mates. It seeks to draw on and adapt tools and approaches used in molecular genetics and physiology to test predictions from evolutionary theories of sexual conflict, life-histories and ageing in an organism of biomedical and ecological significance, the house mouse. It is expected that this approach will allow the study, in unsurpassed detail, of the costs males impose on females via mating, insemination, territoriality and via conflict over how many offspring to have and how to invest in their care.Read moreRead less
The Cape honey bee and the origins of virgin birth. Using honeybees, the aim is to show how a mutation in a single gene creates a new species. This gene causes a shift from sexual to asexual reproduction, allowing workers to clone themselves (virgin birth), thus turning a formerly cooperative species into a social cancer. Observing a real-time speciation event driven by a single gene is an incredibly rare opportunity and enables this project to determine the socio-genetic mechanisms that reduce ....The Cape honey bee and the origins of virgin birth. Using honeybees, the aim is to show how a mutation in a single gene creates a new species. This gene causes a shift from sexual to asexual reproduction, allowing workers to clone themselves (virgin birth), thus turning a formerly cooperative species into a social cancer. Observing a real-time speciation event driven by a single gene is an incredibly rare opportunity and enables this project to determine the socio-genetic mechanisms that reduce gene flow between neighbouring populations and to explain how expression of the gene is regulated. Further, because clonal reproduction often leads to invasiveness in social insects - a dangerous outcome - understanding the origins of virgin birth is also critical to understanding invasiveness.Read moreRead less
Experimental evolution of trait interactions under changed environments. This project aims to use altered light in laboratory and wild guppy populations to test directly the following questions: which traits evolve quickly or slowly and how does this depend upon their functional interactions, and how often do different solutions to the same environmental challenges evolve? The evolutionary effects of environmental change on gene regulation and functional interactions among traits are virtually u ....Experimental evolution of trait interactions under changed environments. This project aims to use altered light in laboratory and wild guppy populations to test directly the following questions: which traits evolve quickly or slowly and how does this depend upon their functional interactions, and how often do different solutions to the same environmental challenges evolve? The evolutionary effects of environmental change on gene regulation and functional interactions among traits are virtually unknown. Using evolution experiments, this project aims to explore traits with known functional links: opsin gene regulation patterns (for colour vision), colouration, and colour-based choice. It is expected that vegetation changes cause immediate environment changes, directly affecting animals’ abilities to choose mates, forage, and avoid predation.Read moreRead less