Intergenomic conflict and the evolution of uniparental inheritance of mitochondria. Why do all mammalian male sperm cells destroy their own mitochondria after fertilisation? A major evolutionary theory, the conflict hypothesis, aims to answer this question. The argument goes as follows. If an organism were to contain mitochondria from both parents, each mitochondrial lineage would be selected in an “arms race” to replicate faster than the other lineage, and this would likely be costly to the org ....Intergenomic conflict and the evolution of uniparental inheritance of mitochondria. Why do all mammalian male sperm cells destroy their own mitochondria after fertilisation? A major evolutionary theory, the conflict hypothesis, aims to answer this question. The argument goes as follows. If an organism were to contain mitochondria from both parents, each mitochondrial lineage would be selected in an “arms race” to replicate faster than the other lineage, and this would likely be costly to the organism. Uniparental inheritance of mitochondria prevents such evolutionary arms race. Sounds plausible? Yes. Has it been tested? No. This project will be the first attempt to test this intriguing hypothesis. Experimental evidence for the evolution of selfish mitochondria would provide solid support for this major evolutionary theory. Read moreRead less
Testing links between life-history and genome evolution. Chromosomes are fundamental units of inheritance. They often differ in number, size and structure between species, and may also differ between individuals within a species. The evolution of chromosomes is tied to that of organisms themselves, making them important for understanding the generation and maintenance of biodiversity. Yet, our understanding of the forces that influence chromosome evolution remains limited. This project will inve ....Testing links between life-history and genome evolution. Chromosomes are fundamental units of inheritance. They often differ in number, size and structure between species, and may also differ between individuals within a species. The evolution of chromosomes is tied to that of organisms themselves, making them important for understanding the generation and maintenance of biodiversity. Yet, our understanding of the forces that influence chromosome evolution remains limited. This project will investigate the formation of unusual chains of chromosomes that are increasingly being found in various vertebrate and invertebrate taxa, using an organism in which they are most commonly found: termites. We will test the hypothesis that inbreeding drives the evolution of meiotic sex linked chromosomes.Read moreRead less
Towards a balanced veiw of parental effects: gaps, biases and opportunities. This project aims to identify and address knowledge gaps in research on parental effects by employing different methodologies (bibliometrics, systematic mapping) and developing novel methods of meta-analysis. This project expects to generate a more holistic and complete view of parental effects on offspring traits than currently appreciated, by elucidating the role of fathers and offspring in addition to mothers. Expect ....Towards a balanced veiw of parental effects: gaps, biases and opportunities. This project aims to identify and address knowledge gaps in research on parental effects by employing different methodologies (bibliometrics, systematic mapping) and developing novel methods of meta-analysis. This project expects to generate a more holistic and complete view of parental effects on offspring traits than currently appreciated, by elucidating the role of fathers and offspring in addition to mothers. Expected outcomes of the project include advancing the field of parental effects and creating new and powerful meta-analytic methods, opening up new avenues for research synthesis. This should provide significant benefits by directing future research in related fields and inspiring new kinds of meta-analyses across disciplines.Read moreRead less
Packed to perform: the effects of telomere traits and free radicals on sperm phenotypes, fertilization success, and offspring viability. This project will integrate telomeres, free radicals and sperm biology into a coherent research program on the roles of free radicals in eroding telomeres and dictating: success in sperm competition and cryptic female choice; longevity and life time fitness in the wild; and, transgenerational effects on offspring viability, in particular mediated via paternal t ....Packed to perform: the effects of telomere traits and free radicals on sperm phenotypes, fertilization success, and offspring viability. This project will integrate telomeres, free radicals and sperm biology into a coherent research program on the roles of free radicals in eroding telomeres and dictating: success in sperm competition and cryptic female choice; longevity and life time fitness in the wild; and, transgenerational effects on offspring viability, in particular mediated via paternal telomere length. Specifically, the project researches how sperm telomere length in sires shorten under stress and how this epigenetic effect is transferred from sires to sons and potentially moderates also filial success in sperm competition and attractiveness in cryptic female choice. Read moreRead less
Lamarckian lizards: novel integration of telomere epigenetics, free radicals and innate antioxidants in condition-dependant sexual signal evolution. In 2009, the Nobel Prize in physiology was awarded Drs. Blackburn, Greider and Szostak for discoveries on telomeres. This project will investigate how telomeres not only cap chromosomes from destruction by free radicals, but also have a key role in life itself, in their influence on ageing, longevity, ornaments and lifetime reproductive success.
Sex Differences in Trait Associations & Shapes: Analysis beyond Average. This project aims to identify and address current knowledge gaps in research on sex differences by employing different methodologies (bibliometrics, systematic mapping) and developing novel methods of meta-analysis. This project expects to generate a more holistic and complete view of sex differences than currently appreciated, by (meta-)analyzing the shapes of traits and associations between traits. Expected outcomes of th ....Sex Differences in Trait Associations & Shapes: Analysis beyond Average. This project aims to identify and address current knowledge gaps in research on sex differences by employing different methodologies (bibliometrics, systematic mapping) and developing novel methods of meta-analysis. This project expects to generate a more holistic and complete view of sex differences than currently appreciated, by (meta-)analyzing the shapes of traits and associations between traits. Expected outcomes of the project include taking the field of sex differences to the next level, and creating new and powerful meta-analytic methods, opening new avenues for research synthesis. This should provide significant benefits by directing future research in related fields and inspiring new kinds of (meta-)analyses across disciplines.Read moreRead less
Frayed at the edges? Integrating evolutionary genetics into the study of species distributional limits. Restricted species, like those in rainforests, represent the vast majority of biodiversity, but they face high risks of extinction due to climate change unless they can adapt. Using butterflies as a model, this project will examine whether rainforest restricted species are able to adapt to future climate change and provide insight into their extinction risk.
Male risk-taking and female mate choice in birds: A synthesis of mechanism and function. Some avian alarm calls are produced only by males, and call rate corresponds closely with recent mating success. This relationship might reflect protection of descendant kin. Such ostentatious risk-taking might also be sexy. We will manipulate male reproductive success in natural social groups to measure the effect on production of costly calls. Parallel lab experiments will selectively change alarm call ....Male risk-taking and female mate choice in birds: A synthesis of mechanism and function. Some avian alarm calls are produced only by males, and call rate corresponds closely with recent mating success. This relationship might reflect protection of descendant kin. Such ostentatious risk-taking might also be sexy. We will manipulate male reproductive success in natural social groups to measure the effect on production of costly calls. Parallel lab experiments will selectively change alarm call rate to test whether this influences attractiveness to females. Results will test a controversial hypothesis, extend current models of parental investment and female mate choice, and permit a synthesis of work on sexual selection and animal cognition.Read moreRead less
Discovery Early Career Researcher Award - Grant ID: DE120101126
Funder
Australian Research Council
Funding Amount
$375,000.00
Summary
More than meets the egg: environmental effects on sperm quality, sperm competitive success, and offspring fitness. Can a male's environment affect his sperm quality and the health of his offspring? By experimentally testing how the paternal environment affects sperm quality, this project will help us understand (1) why sperm vary so much, and (2) what consequences variability in sperm quality has for paternity success and offspring fitness.
Discovery Early Career Researcher Award - Grant ID: DE230100087
Funder
Australian Research Council
Funding Amount
$411,567.00
Summary
Illuminating the function and evolution of iridescence. This project seeks to reveal how dynamic colour signals enable effective communication by connecting the production, transmission, and perception of visual information through space and time. By integrating innovative analyses of behaviour, physiology, and optics, it will offer original insight into how information is encoded and fluidly exchanged under real-world conditions, and produce new tools for interrogating the subjective visual wor ....Illuminating the function and evolution of iridescence. This project seeks to reveal how dynamic colour signals enable effective communication by connecting the production, transmission, and perception of visual information through space and time. By integrating innovative analyses of behaviour, physiology, and optics, it will offer original insight into how information is encoded and fluidly exchanged under real-world conditions, and produce new tools for interrogating the subjective visual world of animals. This work promises benefits to our understanding of how the universal process of communication drives adaptation amidst environmental change, with significant scope for bio-inspired solutions to contemporary problems of vision and efficient information processing, including among humans.Read moreRead less