18 Works

Data from: Unexpected absence of genetic separation of a highly diverse population of hookworms from geographically isolated hosts

Benjamin T. Haynes, Alan D. Marcus, Damien P. Higgins, Jaime Gongora, Rachael Gray & Jan Slapeta
The high natal site fidelity of endangered Australian sea lions (Neophoca cinerea) along the southern Australian coast suggests that their maternally transmitted parasitic species, such as hookworms, will have restricted potential for dispersal. If this is the case, we would expect to find a hookworm haplotype structure corresponding to that of the host mtDNA haplotype structure; that is, restricted among geographically separated colonies. In this study, we used a fragment of the cytochrome c oxidase...

Data from: MHC class II diversity of koala (Phascolarctos cinereus) populations across their range

Damien P. Higgins, Quintin Lau, Weerachai Jaratlerdsiri, Joanna E. Griffith & Jaime Gongora
Major histocompatibility complex class II (MHCII) genes code for proteins that bind and present antigenic peptides and trigger the adaptive immune response. We present a broad geographical study of MHCII DA β1 (DAB) and DB β1 (DBB) variants of the koala (Phascolarctos cinereus; n=191) from 12 populations across eastern Australia, with a total of 13 DAB and 7 DBB variants found. We identified greater MHCII variation and, possibly, additional gene copies in koala populations in...

Data from: Restricting access to invasion hubs enables sustained control of an invasive vertebrate

Mike Letnic, Jonathan K. Webb, Tim J. Jessop & Tim Dempster
Biological invasions often occur through expansion of satellite populations that become established at ‘invasion hubs’. Invasion hubs can result from random dispersal events, but frequently arise when invading individuals actively choose habitats using cues that signify high-quality environments where the fitness consequences are positive. Theoretical studies suggest that targeted control at invasion hubs can effectively suppress the populations and impacts of invaders. In arid Australia, small dams that provide water for livestock function as invasion...

Data from: Snake and bird predation drive the repeated convergent evolution of correlated life history traits and phenotype in the Izu Island scincid lizard (Plestiodon latiscutatus)

Matthew C. Brandley, Takeo Kuriyama & Masami Hasegawa
Predation may create strong natural selection pressure on the phenotype and life history characteristics of prey species. The Izu scincid lizards (Plestiodon latiscutatus) that inhabit the four Japanese Izu Islands with only bird predators are drab brown, mature later, lay small clutches of large eggs, and hatch large neonates. In contrast, skinks on seven islands with both snake and bird predators are conspicuously colored, mature early, lay large clutches of small eggs, and hatch small...

Data from: Increased temperature, but not acidification, enhances fertilization and development in a tropical urchin: potential for adaptation to a tropicalized eastern Australia

Shawna A. Foo, Symon A. Dworjanyn, Mehar S. Khatkar, Alistair G. B. Poore & Maria Byrne
To predict effects of global change on marine populations, it is important to measure the effects of climate stressors on performance and potential for adaptation. Adaptation depends on heritable genetic variance for stress tolerance being present in populations. We determined effects of near-future ocean conditions on fertilisation success of the sea urchin Pseudoboletia indiana. In 16 multiple dam-sire crosses, we quantified genetic variation in tolerance of warming (+3°C) and acidification (-0.3-0.5 pH units) at the...

Data from: A quantitative review of MHC-based mating preference: the role of diversity and dissimilarity

T. Kamiya, K. O'Dwyer, H. Westerdahl, A. Senior & S. Nakagawa
Sexual selection hypotheses stipulate that the major histocompatibility complex genes (MHC) constitute a key molecular underpinning for mate choice in vertebrates. The last four decades saw growing empirical literature on the role of MHC diversity and dissimilarity in mate choice for a wide range of vertebrate animals, but with mixed support for its significance in natural populations. Using formal phylogenetic meta-analysis and meta-regression techniques, we quantitatively review the existing literature on MHC-dependent mating preferences in...

Data from: Listening to the environment: hearing differences from an epigenetic effect in solitarious and gregarious locusts

Shira D. Gordon, Joseph C. Jackson, Stephen M. Rogers & James F. C. Windmill
Locusts display a striking form of phenotypic plasticity, developing into either a lone-living solitarious phase or a swarming gregarious phase depending on population density. The two phases differ extensively in appearance, behaviour and physiology. We found that solitarious and gregarious locusts have clear differences in their hearing, both in their tympanal and neuronal responses. We identified significant differences in the shape of the tympana that may be responsible for the variations in hearing between locust...

Data from: Phantom alternatives influence food preferences in the eastern honey bee Apis cerana

Ken Tan, Shihao Dong, Xiwen Liu, Weiweng Chen, Yuchong Wang, Benjamin P. Oldroyd & Tanya Latty
1. Most models of animal choice behaviour assume that desirable but unavailable options, such as a high quality, but inhabited nest site, do not influence an individual’s preferences for the remaining options. However, experiments suggest that in mammals such ‘phantom’ alternatives can alter, and even reverse, an individual’s preferences for other items in a choice set. 2. Here we investigate the effect of phantom alternatives on feeder preferences in the eastern honey bee, Apis cerana....

Data from: Directional dispersal has not evolved during the cane toad invasion

Gregory P. Brown, Benjamin L. Phillips & Richard Shine
1. The ability to disperse along a consistent compass heading strongly affects the rate and efficiency of an animal's displacement, and thus is under selection at the expanding edge of a biological invasion. 2. We used radiotelemetry to assess whether the dispersal direction of cane toads (Rhinella marina) changed as a function of time since invasion, by comparing (i) toads at a single site monitored annually for 10 years subsequent to toad arrival; (ii) toads...

Data from: A few large roads or many small ones? How to accommodate growth in vehicle numbers to minimise impacts on wildlife

Jonathan R. Rhodes, Daniel Lunney, John Callaghan & Clive A. McAlpine
Roads and vehicular traffic are among the most pervasive of threats to biodiversity because they fragmenting habitat, increasing mortality and opening up new areas for the exploitation of natural resources. However, the number of vehicles on roads is increasing rapidly and this is likely to continue into the future, putting increased pressure on wildlife populations. Consequently, a major challenge is the planning of road networks to accommodate increased numbers of vehicles, while minimising impacts on...

Data from: Heterogeneity in individual quality and reproductive trade-offs within species

Jiahui N. Lim, Alistair Mcnair Senior & Shinichi Nakagawa
Interspecifically, a reasonable body of evidence supports a trade-off between offspring size and number. However, at the intraspecific level, a whole manner of phenotypic correlations between offspring size and number are observed. These correlations may be predicted when heterogeneity in resource availability, or quality, is considered. Making the assumption that maternal size is a proxy for resource availability, we meta-analytically quantified four phenotypic reproductive correlations within numerous species: (1) maternal size and offspring size, (2)...

Data from: Synergistic interaction between UVB radiation and temperature increases susceptibility to parasitic infection in a fish

Rebecca L. Cramp, Stefanie Reid, Frank Seebacher & Craig E. Franklin
Levels of UVB radiation (UVB) and mean temperatures have increased substantially over recent decades in many regions of the world. Both stressors independently can compromise immune function, disease resistance and fitness in fish. The impact of UVB can also be exacerbated by interactions with environmental temperatures. In this paper, we test the hypothesis that UVB and temperature act synergistically to influence patterns of energy consumption and susceptibility to disease. We exposed mosquitofish, Gambusia holbrooki, to...

Data from: Differential activation of serotonergic neurones during short- and long-term gregarisation of desert locusts

Stephen M. Rogers & Swidbert R. Ott
Serotonin is a neurochemical with evolutionarily conserved roles in orchestrating nervous system function and behavioural plasticity. A dramatic example is the rapid transformation of desert locusts from cryptic asocial animals into gregarious crop pests that occurs when drought forces them to accumulate on dwindling resources, triggering a profound alteration of behaviour within just a few hours. The onset of crowding induces a surge in serotonin within their thoracic ganglia that is sufficient and necessary to...

Data from: Embryonic developmental temperatures modulate thermal acclimation of performance curves in tadpoles of the frog Limnodynastes peronii

Frank Seebacher & Veronica S. Grigaltchik
Performance curves of physiological rates are not fixed, and determining the extent to which thermal performance curves can change in response to environmental signals is essential to understand the effect of climate variability on populations. The aim of this study was to determine whether and how temperatures experienced during early embryonic development affect thermal performance curves of later life history stages in the frog Limnodynastes peronii. We tested the hypotheses that a) the embryonic environment...

Data from: Mixture models of nucleotide sequence evolution that account for heterogeneity in the substitution process across sites and across lineages

Vivek Jayaswal, Thomas K. F. Wong, John Robinson, Leon Poladian, Lars S. Jermiin & Thomas K.F. Wong
Molecular phylogenetic studies of homologous sequences of nucleotides often assume that the underlying evolutionary process was globally stationary, reversible and homogeneous (SRH), and that a model of evolution with one or more site-specific and time-reversible rate matrices (e.g., the GTR rate matrix) is enough to accurately model the evolution of data over the whole tree. However, an increasing body of data suggests that evolution under these conditions is an exception, rather than the norm. To...

Data from: Selection at the Esterase-2 locus of Drosophila buzzatii? Perturbation-reperturbation experiments

J. Stuart F. Barker & Peter C. Thomson
Apparent selection affecting starch gel electrophoretic alleles at the Esterase-2 locus of Drosophila buzzatii has been detected in laboratory and natural populations. Perturbation-reperturbation of allele frequencies in replicated laboratory populations attempts to test direct selective effects at the locus versus effects of linked loci. Sequential gel electrophoresis has identified more alleles within starch classes, and three of these alleles (within the a, b and c starch alleles) were used in cage population experiments. Allele a/1.00/1.00/1.00...

Data from: Towards a synthesis of frameworks in nutritional ecology: interacting effects of protein, carbohydrate, and phosphorus on field cricket fitness

Sarah J. Harrison, David Raubenheimer, Stephen J. Simpson, Jean-Guy J. Godin & Susan M. Bertram
Phosphorus has been identified as an important determinant of nutrition-related biological variation. The macronutrients protein (P) and carbohydrates (C), both alone and interactively, are known to affect animal performance. No study, however, has investigated the importance of phosphorus relative to dietary protein or carbohydrates, or the interactive effects of phosphorus with these macronutrients, on fitness-related traits in animals. We used a nutritional geometry framework to address this question in adult field crickets (Gryllus veletis). Our...

Data from: Tree imbalance causes a bias in phylogenetic estimation of evolutionary timescales using heterochronous sequences

David Duchêne, Sebastián Duchêne & Simon Y. W. Ho
Phylogenetic estimation of evolutionary timescales has become routine in biology, forming the basis of a wide range of evolutionary and ecological studies. However, there are various sources of bias that can affect these estimates. We investigated whether tree imbalance, a property that is commonly observed in phylogenetic trees, can lead to reduced accuracy or precision of phylogenetic timescale estimates. We analysed simulated data sets with calibrations at internal nodes and at the tips, taking into...

Registration Year

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  • University of Sydney
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  • University of Strathclyde
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  • French National Centre for Scientific Research
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