35 Works

Data from: Correlated evolution of sexual dimorphism and male dimorphism in a clade of neotropical harvestmen

Bruno Alves Buzatto, Joseph L. Tomkins, Leigh W. Simmons & Glauco Machado
Secondary sexual traits increase male fitness, but may be maladaptive in females, generating intralocus sexual conflict that is ameliorated through sexual dimorphism. Sexual selection on males may also lead some males to avoid expenditure on secondary sexual traits and achieve copulations using alternative reproductive tactics (ARTs). Secondary sexual traits can increase or decrease fitness in males, depending on which ART they employ, generating intralocus tactical conflict that can be ameliorated through male dimorphism. Due to...

Data from: Replicated evolutionary divergence in the cuticular hydrocarbon profile of male crickets associated with the loss of song in the Hawaiian archipelago

Leigh W. Simmons, Melissa L. Thomas, Brian Gray & Marlene Zuk
Female choice based on male secondary sexual traits is well documented, although the extent to which this selection can drive an evolutionary divergence in male traits among populations is less clear. Male field crickets Teleogryllus oceanicus attract females using a calling song and once contacted switch to courtship song to persuade them to mate. These crickets also secrete onto their cuticle a cocktail of long-chained fatty acids or cuticular hydrocarbons (CHCs). Females choose among potential...

Data from: Mating portfolios: bet-hedging, sexual selection and female multiple mating

Francisco Garcia-Gonzalez, Jonathan P. Evans & Yukio Yasui
Polyandry (female multiple mating) has profound evolutionary and ecological implications. Despite considerable work devoted to understanding why females mate multiply, we currently lack convincing empirical evidence to explain the adaptive value of polyandry. Here, we provide a direct test of the controversial idea that bet-hedging functions as a risk-spreading strategy that yields multi-generational fitness benefits to polyandrous females. Unfortunately, testing this hypothesis is far from trivial, and the empirical comparison of the across-generations fitness payoffs...

Data from: Population genetic structure of the Pocillopora damicornis morphospecies along Ningaloo Reef, Western Australia

Luke Thomas, G. A. Kendrick, M. Stat, K. L. Travaille, G. Shedrawi, W. J. Kennington, GA Kendrick, KL Travaille & WJ Kennington
The effective management of a coral reef system relies on a detailed understanding of the population structure of dominant habitat-forming species. For some corals, however, high levels of phenotypic plasticity have made species delineation based on morphological characteristics alone unreliable, suggesting that previous studies of population genetic structure may have been influenced by the inclusion of multiple genetic lineages in the analyses. We examined the population structure of the Pocillopora damicornis morphospecies along the World...

Data from: Female effects, but no intrinsic male effects on paternity outcome in crickets

Leigh W. Simmons, Maxine Lovegrove & Maria Almbro
Competitive fertilization success can depend on the relative abilities of competing males to fertilize available ova, and on mechanisms of cryptic female choice that moderate paternity. Competitive fertilization success is thus an emergent property of competing male genotypes, female genotype and their interactions. Accurate estimates of intrinsic male effects on competitive fertilization success are therefore problematic. We used a cross-classified nonbreeding design in which rival male family background was standardized to partition variation in competitive...

Data from: Environmental filtering explains variation in plant diversity along resource gradients

Etienne Laliberté, Graham Zemunik & Benjamin L. Turner
The mechanisms that shape plant diversity along resource gradients remain unresolved because competing theories have been evaluated in isolation. By testing multiple theories simultaneously across a >2-million-year dune chronosequence in an Australian biodiversity hotspot, we show that variation in plant diversity is not explained by local resource heterogeneity, resource partitioning, nutrient stoichiometry, or soil fertility along this strong resource gradient. Rather, our results suggest that diversity is determined by environmental filtering from the regional flora,...

Data from: Parasite load and MHC diversity in undisturbed and agriculturally modified habitats of the ornate dragon lizard

Jacek Radwan, Katarzyna Kuduk, Esther Levy, Natasha LeBas & Wieslaw Babik
MHC gene polymorphism is thought to be driven by host-parasite coevolution, but the evidence for an association between the selective pressure from parasites and the number of MHC alleles segregating in a population is scarce and inconsistent. Here, we characterized MHC class I polymorphism in a lizard whose habitat preferences (rock outcrops) lead to the formation of well-defined and stable populations. We investigated the association between the load of ticks, which were used as a...

Data from: Rapid loss of behavioural plasticity and immunocompetence under intense sexual selection

Emile Van Lieshout, Kathryn Bridget McNamara & Leigh W. Simmons
Phenotypic plasticity allows animals to maximise fitness by conditionally expressing the phenotype best adapted to their environment. While evidence for such adjustment in reproductive tactics is common, little is known about how phenotypic plasticity evolves in response to sexual selection. We examined the effect of sexual selection intensity on phenotypic plasticity in mating behaviour using the beetle Callosobruchus maculatus. Male genital spines harm females during mating and females exhibit copulatory kicking, an apparent resistance trait...

Data from: Reading the leaves: a comparison of leaf rank and automated areole measurement for quantifying aspects of leaf venation

Walton A. Green, Stefan A. Little, Charles A. Price, Scott L. Wing, Selena Y. Smith, Benjamin Kotrc & Gabriela Doria
The reticulate venation that is characteristic of a dicot leaf has excited interest from systematists for more than a century, and from physiological and developmental botanists for decades. The tools of digital image acquisition and computer image analysis, however, are only now approaching the sophistication needed to quantify aspects of the venation network found in real leaves quickly, easily, accurately, and reliably enough to produce biologically meaningful data. In this paper, we examine 120 leaves...

Data from: Male sperm storage compromises sperm motility in guppies

Clelia Gasparini, Jennifer L. Kelley & Jonathan P. Evans
Sperm senescence can have important evolutionary implications due to its deleterious effects on sperm quality and offspring performance. Consequently, it has been argued that polyandry (female multiple mating) may facilitate the selection of younger, and therefore competitively superior, sperm when ejaculates from multiple males compete for fertilization. Surprisingly, however, unequivocal evidence that sperm ageing influences traits that underlie sperm competitiveness is lacking. Here, we used a paired experimental design that compares sperm quality between ‘old’...

Data from: Long-term data suggest jarrah-forest establishment at restored mine sites is resistant to climate variability

Rachel J. Standish, Matthew I. Daws, Aaron D. Gove, Raphael K. Didham, Andrew H. Grigg, John M. Koch & Richard J. Hobbs
1. Global climate change is projected to increase the frequency and intensity of drought in dry regions due to warming temperatures and declining rainfall. Severe drought can trigger tree mortality and drive persistent vegetation change. 2. To date, most empirical studies have focused on drought-induced mortality of adult trees, but this needs to be matched by similar efforts to understand drought impacts on seedling establishment if we are to understand the resilience of the world's...

Data from: Sediment and turbidity associated with offshore dredging increase coral disease prevalence on nearby reefs

F. Joseph Pollock, Joleah B. Lamb, Stuart N. Field, Scott F. Heron, Britta Schaffelke, George Shedrawi, David G. Bourne & Bette L. Willis
In recent decades, coral reef ecosystems have declined to the extent that reefs are now threatened globally. While many water quality parameters have been proposed to contribute to reef declines, little evidence exists conclusively linking specific water quality parameters with increased disease prevalence in situ. Here we report evidence from in situ coral health surveys confirming that chronic exposure to dredging-associated sediment plumes significantly increase the prevalence of white syndromes, a devastating group of globally...

Data from: Experimental evidence that even minor livestock trampling has severe effects on land snail communities in forest remnants

Lisa H. Denmead, Gary M. Barker, Rachel J. Standish & Raphael K. Didham
1. Land-use intensification is increasing dramatically in production systems world-wide. Livestock production is an important component of production land use, and increases in livestock densities have had a wide range of negative consequences. The off-site effects of livestock grazing and trampling on native vegetation adjacent to pastoral land have received less attention than on-farm effects. Moreover, where significant ecological effects of livestock spillover have been identified, the mechanistic determinants of these effects have not typically...

Data from: Local genetic patchiness but no regional differences between Indo-West Pacific populations of the dogtooth tuna Gymnosarda unicolor

Blair P. Bentley, Euan S. Harvey, Stephen J. Newman, David J. Welch, Adam K. Smith, Winn J. Kennington, DJ Welch, ES Harvey, SJ Newman, BP Bentley & WJ Kennington
Physical barriers can have profound impacts on dispersal in marine species. Here, we investigate population structure and levels of relatedness among individuals of the coral reef associated fish, the dogtooth tuna Gymnosarda unicolor, collected from 15 sites across the Indo-West Pacific region. We screened 92 individuals for genetic variation at 13 nuclear microsatellite loci and the cytochrome oxidase subunit 1 (CO1) mitochondrial DNA (mtDNA) gene. We detected no genetic differentiation between ocean basins or between...

Data from: Experimental reduction in dietary omega-3 polyunsaturated fatty acids depresses sperm competitiveness

, Clelia Gasparini, Giovanni M. Turchini & Jonathan P. Evans
The health benefits of diets containing rich sources of long-chain omega-3 polyunsaturated fatty acids (n-3 LC-PUFA) are well documented and include reductions in the risk of several diseases typical of Western societies. The dietary intake of n-3 LC-PUFA has also been linked to fertility, and there is abundant evidence that a range of ejaculate traits linked to fertility in humans, livestock and other animals depend on an adequate intake of n-3 LC-PUFA from dietary sources....

Data from: Resistance and resilience to changing climate and fire regime depend on plant functional traits

Neal J. Enright, Joseph B. Fontaine, Byron B. Lamont, Ben P. Miller & Vanessa C. Westcott
Changing disturbance-climate interactions will drive shifts in plant communities: these effects are not adequately quantified by environmental niche models used to predict future species distributions. We quantified the effects of more frequent fire and lower rainfall - as projected to occur under a warming and drying climate - on population responses of shrub species in biodiverse Mediterranean-climate type shrublands near Eneabba, southwestern Australia. Using experimental fires, we measured the density of all shrub species for...

Data from: The effect of maternal and paternal immune challenge on offspring immunity and reproduction in a cricket

Kathryn B. McNamara, Emile Van Lieshout & Leigh W. Simmons
Trans-generational immune priming is the transmission of enhanced immunity to offspring following a parental immune challenge. Although within-generation increased investment into immunity demonstrates clear costs on reproductive investment in a number of taxa, the potential for immune priming to impact on offspring reproductive investment has not been thoroughly investigated. We explored the reproductive costs of immune priming in a field cricket, Teleogryllus oceanicus. To assess the relative importance of maternal and paternal immune status, mothers...

Data from: Female social preference for males that have evolved via monogamy: evidence of a trade-off between pre- and post-copulatory sexually selected traits?

Renée C. Firman
When females mate with multiple males both pre- and post-copulatory sexual selections occur. It has been suggested that females benefit from polyandry when better-quality males are successful in sperm competition and sire high-quality offspring. Indeed, studies of experimental evolution have confirmed that sperm competition selects for both increased ejaculate quality and elevated offspring viability. Fewer investigations have explored whether these fitness benefits are evident beyond early life-history stages. Here, I used house mice (Mus domesticus)...

Data from: Towards an evolutionary understanding of questing behaviour in the tick Ixodes ricinus

Joseph L. Tomkins, Jennifer Aungier, Wade N. Hazel & Lucy Gilbert
The tick Ixodes ricinus finds its hosts by climbing vegetation and adopting a sit-and-wait tactic. This “questing” behaviour is known to be temperature-dependent, such that questing increases with temperature up to a point where the vapor pressure deficit (drying effect) forces ticks down to rehydrate in the soil or mat layer. Little if any attention has been paid to understanding the questing of ticks from an evolutionary perspective. Here we ask whether populations from colder...

Data from: Morphological and moisture availability controls of the leaf area-to-sapwood area ratio: analysis of measurements on Australian trees

Henrique Furstenau Togashi, Ian Colin Prentice, Bradley John Evans, David Ian Forrester, Paul Drake, Paul Feikema, Kim Brooksbank, Derek Eamus, Daniel Taylor & Iain Colin Prentice
1. The leaf area-to-sapwood area ratio (LA:SA) is a key plant trait that links photosynthesis to transpiration. The pipe model theory states that the sapwood cross-sectional area of a stem or branch at any point should scale isometrically with the area of leaves distal to that point. Optimization theory further suggests that LA:SA should decrease toward drier climates. Although acclimation of LA:SA to climate has been reported within species, much less is known about the...

Data from: Designer self-assembling hydrogel scaffolds can impact skin cell proliferation and migration

Michael Bradshaw, Diwei Ho, Mark W. Fear, Fabrizio Gelain, Fiona M. Wood & K. Swaminathan Iyer
There is a need to develop economical, efficient and widely available therapeutic approaches to enhance the rate of skin wound healing. The optimal outcome of wound healing is restoration to the pre-wound quality of health. In this study we investigate the cellular response to biological stimuli using functionalized nanofibers from the self-assembling peptide, RADA16. We demonstrate that adding different functional motifs to the RADA16 base peptide can influence the rate of proliferation and migration of...

Data from: Calibration of pelagic stereo-BRUVs and scientific longline surveys for sampling sharks

Julia Santana-Garcon, Matias Braccini, Tim J. Langlois, Stephen J. Newman, Rory B. McAuley & Euan S. Harvey
1. Our understanding of the ecology of sharks and other highly mobile marine species often relies on fishery-dependent data or extractive fishery-independent techniques that can result in catchability and size-selectivity biases. Pelagic Baited Remote Underwater stereo-Video Systems (pelagic stereo-BRUVs) provide a standardized, non-destructive and fishery-independent approach to estimate biodiversity measures of fish assemblages in the water column. However, the performance of this novel method has not yet been assessed relative to other standard sampling techniques....

Data from: Silent fish surveys: bubble-free diving highlights inaccuracies associated with SCUBA-based surveys in heavily fished areas

Steven J. Lindfield, Jennifer L. McIlwain, Euan S. Harvey & Andrew R. Halford
1. Underwater visual census (UVC) using SCUBA is a commonly used method for assessing reef fish communities. Evidence suggests, however, that fish avoid divers due to the sound of bubbles produced by open-circuit SCUBA, and avoidance behaviour is more pronounced as fishing pressure increases. Despite the potential for producing biased counts and conclusions, these behavioural effects have rarely been quantified, especially when assessing the effectiveness of marine protected areas (MPAs). 2. To test the magnitude...

Data from: Canopy facilitates seaweed recruitment on subtidal temperate reefs

Scott Bennett & Thomas Wernberg
1. Facilitation through physical stress amelioration has been largely overlooked in subtidal marine ecosystems, where abiotic gradients are perceived to be benign. However, seemingly subtle changes in marine environmental conditions can alter community structure across vast areas, and therefore, the type of interactions and any refuge provided by marine foundation species. This could have substantial implications for community organization. 2. We measured net recruitment rates of subtidal seaweeds under experimentally modified canopy densities, across 1000...

Data from: Range-wide multilocus phylogeography of the red fox reveals ancient continental divergence, minimal genomic exchange, and distinct demographic histories

Mark J. Statham, Zhenghuan Wang, Carl D. Soulsbury, Jan Janecka, Benjamin N. Sacks, Keith B. Aubry, Oliver Berry, Ceiridwen J. Edwards & James Murdoch
Widely distributed taxa provide an opportunity to compare biogeographic responses to climatic fluctuations on multiple continents and to investigate speciation. We conducted the most geographically and genomically comprehensive study to date of the red fox (Vulpes vulpes), the world's most widely distributed wild terrestrial carnivore. Analyses of 697 bp of mitochondrial sequence in ~1000 individuals suggested an ancient Middle Eastern origin for all extant red foxes and a 400 kya (SD = 139 kya) origin...

Registration Year

  • 2014
    35

Resource Types

  • Dataset
    35

Affiliations

  • University of Western Australia
    35
  • Curtin University
    5
  • University of California, Davis
    3
  • Murdoch University
    2
  • University of Minnesota
    2
  • University of Melbourne
    2
  • Macquarie University
    2
  • University of Göttingen
    2
  • Harvard University
    2
  • Australian Institute of Marine Science
    2