Vocal mimicry in songbirds. Many of the world’s largest clade of birds - the songbirds - incorporate vocal mimicry in their songs, but while scientific interest in vocal mimicry dates from Aristotle, limited progress has been made. With our unique research program we aim to provide an empirically based, theoretically informed understanding of avian vocal mimicry. In an important advance, we will examine both sexes to test long-held male-centric assumptions about evolutionary origins and maintena ....Vocal mimicry in songbirds. Many of the world’s largest clade of birds - the songbirds - incorporate vocal mimicry in their songs, but while scientific interest in vocal mimicry dates from Aristotle, limited progress has been made. With our unique research program we aim to provide an empirically based, theoretically informed understanding of avian vocal mimicry. In an important advance, we will examine both sexes to test long-held male-centric assumptions about evolutionary origins and maintenance of this trait. Crucially, we focus on lineages found only in Australia and PNG, where songbirds originated, to develop a robust scientific understanding of vocal mimicry across the entire songbird clade, and so provide an important new perspective on why and how song began.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: DE200100500
Funder
Australian Research Council
Funding Amount
$414,089.00
Summary
The role of enemies in the generation of biodiversity. A fundamental question in biology is how new species are generated. The role of abiotic factors has been widely explored, but there is still little known about the role that ecological or behavioural interactions between organisms, such as parasitism or predation, play in the generation of diversity. This project aims to test the importance of anti-predator defences (warning colours) in generating species. It will combine micro- and macroevo ....The role of enemies in the generation of biodiversity. A fundamental question in biology is how new species are generated. The role of abiotic factors has been widely explored, but there is still little known about the role that ecological or behavioural interactions between organisms, such as parasitism or predation, play in the generation of diversity. This project aims to test the importance of anti-predator defences (warning colours) in generating species. It will combine micro- and macroevolutionary analyses to provide an in-depth test of this association. This project aims to provide a bridge between behavioural ecology and macroevolutionary processes, using Australian fauna, and increase our knowledge about whether and how enemies can contribute to generating diversity of life on earth.Read moreRead less
Can animal dispersal inform fire management for species conservation? This project aims to improve fire management for environmental outcomes in northern Australia. It will address a key knowledge gap in our understanding of the effects of fire on biodiversity, relating to the spatial pattern of fire in the landscape. This is important because changing patterns of fire are not only a risk to humans but have major effects on our environment. This project will involve researchers, environmental ma ....Can animal dispersal inform fire management for species conservation? This project aims to improve fire management for environmental outcomes in northern Australia. It will address a key knowledge gap in our understanding of the effects of fire on biodiversity, relating to the spatial pattern of fire in the landscape. This is important because changing patterns of fire are not only a risk to humans but have major effects on our environment. This project will involve researchers, environmental managers and indigenous land owners to design better fire management strategies for biodiversity. The key benefits include new knowledge and tools to better manage fire and address one of our major environmental challenges, the decline of native wildlife in northern Australia.Read moreRead less
Group dynamics, Allee effects and population regulation in cooperative breeders. Understanding population dynamics is crucial for effective conservation biology. In many cases breeding is limited by high density, but in social species the opposite is true, exposing small groups to high extinction risk. However, analyses of population dynamics in social species is rare, limiting our ability to effectively conserve such species.
Sex and the generation gap: seasonal changes in sex allocation. Answering the question 'When is it better to produce more sons than daughters?' has shed important insights into fundamental questions in biology and led to theory that can be applied to problems in agriculture, fisheries and conservation. The project will extend the current theory to increase its applicability, and test it using an introduced pest fish.
Ecology and phylogeography of bird migration between Australia and New Guinea: paradise kingfishers as a model species. This project examines the evolutionary causes and ecological consequences of intra-tropical bird migration between north Australia and New Guinea, one of the major migration systems of the southern hemisphere. I will use the buff-breasted paradise kingfisher as a model species, exploiting two features of its biology (an aerodynamically costly tail and a breeding distribution wi ....Ecology and phylogeography of bird migration between Australia and New Guinea: paradise kingfishers as a model species. This project examines the evolutionary causes and ecological consequences of intra-tropical bird migration between north Australia and New Guinea, one of the major migration systems of the southern hemisphere. I will use the buff-breasted paradise kingfisher as a model species, exploiting two features of its biology (an aerodynamically costly tail and a breeding distribution with a large latitudinal range) to shed light on the costs, benefits, and ecological correlates of intra-tropical migration. Molecular markers will be used to identify non-breeding distributions, migratory patterns, and the biogeographic histories of the different breeding populations within Australia.Read moreRead less
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
Biogeography of avian mating systems: polyandry, reverse-plumage dimorphism, and sexual selection in Cape York and New Guinea eclectus parrots. Current sexual selection theory explains how one sex can be strongly sexually selected through competition or mate choice, or how sexual selection can push both sexes in the same direction through mutual mate choice. However, the strong and independent sexual selection in both sexes of eclectus parrot is unique amongst birds, and poses a major challenge ....Biogeography of avian mating systems: polyandry, reverse-plumage dimorphism, and sexual selection in Cape York and New Guinea eclectus parrots. Current sexual selection theory explains how one sex can be strongly sexually selected through competition or mate choice, or how sexual selection can push both sexes in the same direction through mutual mate choice. However, the strong and independent sexual selection in both sexes of eclectus parrot is unique amongst birds, and poses a major challenge to existing theory. Here I propose novel field experiments and biogeographical comparisons of populations in Cape York and New Guinea that, when combined with molecular techniques and spectro-radiometry, will identify the elements of competition and mate choice responsible for their extraordinary reverse plumage dimorphism.Read moreRead less
Interspecific communication and the evolution of alarm calls in birds. There are probably more papers on vocal communication in some individual European and American species of birds than there are on all Australian species combined. Our work will contribute to redressing this imbalance by carrying out detailed studies on acoustic communication in a major group of Australian songbirds (scrubwrens, fairy-wrens, honeyeaters and allies), while at the same time addressing an unsolved general problem ....Interspecific communication and the evolution of alarm calls in birds. There are probably more papers on vocal communication in some individual European and American species of birds than there are on all Australian species combined. Our work will contribute to redressing this imbalance by carrying out detailed studies on acoustic communication in a major group of Australian songbirds (scrubwrens, fairy-wrens, honeyeaters and allies), while at the same time addressing an unsolved general problem in call design first identified 50 years ago in European songbirds. Specifically, we will test whether different prey species have repeatedly evolved 'hawk' alarm calls of similar structure, and whether such evolution could be due to benefits of having similar calls when communicating with other prey species. Read moreRead less