28 Works

Data from: Learning and robustness to catch-and-release fishing in a shark social network

Johann Mourier, Culum Brown & Serge Planes
Individuals can play different roles in maintaining connectivity and social cohesion in animal populations and thereby influence population robustness to perturbations. We performed a social network analysis in a reef shark population to assess the vulnerability of the global network to node removal under different scenarios. We found that the network was generally robust to the removal of nodes with high centrality. The network appeared also highly robust to experimental fishing. Individual shark catchability decreased...

Data from: Topology, divergence dates, and macroevolutionary inferences vary between different tip-dating approaches applied to fossil theropods (Dinosauria)

David W. Bapst, April M. Wright, Nick J. Matzke & Graeme T. Lloyd
Dated phylogenies of fossil taxa allow palaeobiologists to estimate the timing of major divergences and placement of extinct lineages, and to test macroevolutionary hypotheses. Recently developed Bayesian ‘tip-dating’ methods simultaneously infer and date the branching relationships among fossil taxa, and infer putative ancestral relationships. Using a previously published dataset for extinct theropod dinosaurs, we contrast the dated relationships inferred by several tip-dating approaches and evaluate potential downstream effects on phylogenetic comparative methods. We also compare...

Data from: Phylogenetic variation in hind-limb bone scaling of flightless theropods

Nicholas R. Chan
The robusticity of the weight-bearing limbs of large terrestrial animals is expected to increase at a more rapid rate than in their smaller relatives. This scaling has been hypothesized to allow large species to maintain stresses in the limb bones that are similar to those seen in smaller ones. Curvilinear scaling has previously been found in mammals and nonavian theropods but has not been demonstrated in birds. In this study, polynomial regressions of leg-bone length...

Data from: High atmospheric temperatures and ‘ambient incubation’ drive embryonic development and lead to earlier hatching in a passerine bird

Simon C. Griffith, Enrico Sorato, Mark C. Mainwaring & Christa Beckmann
Tropical and subtropical species typically experience relatively high atmospheric temperatures during reproduction, and are subject to climate-related challenges that are largely unexplored, relative to more extensive work conducted in temperate regions. We studied the effects of high atmospheric and nest temperatures during reproduction in the zebra finch. We characterized the temperature within nests in a subtropical population of this species in relation to atmospheric temperature. Temperatures within nests frequently exceeded the level at which embryo’s...

Data from: Body mass-corrected molecular rate for bird mitochondrial DNA

Benoit Nabholz, Robert Lanfear & Jérome Fuchs
Mitochondrial DNA remains one of the most widely used molecular markers to reconstruct the phylogeny and phylogeography of closely related birds. It has been proposed that bird mitochondrial genomes evolve at a constant rate of ~0.01 substitution per site per million years, that is that they evolve according to a strict molecular clock. This molecular clock is often used in studies of bird mitochondrial phylogeny and molecular dating. However, rates of mitochondrial genome evolution vary...

Data from: The price of associating with breeders in the cooperatively breeding chestnut-crowned babbler: foraging constraints, survival and sociality

Enrico Sorato, Simon C. Griffith & Andy F. Russell
Understanding the costs of living with breeders might offer new insights into the factors that counter evolutionary transitions from selfish individuals to cooperative societies. While selection on early dispersal is well-understood, it is less clear whether costs are also associated with remaining with family members during subsequent breeding; a pre-requisite to the evolution of kin-based cooperation. We propose and test the hypothesis that living in groups containing breeders is costly and that such costs are...

Data from: The colour of paternity: extra-pair paternity in the wild Gouldian finch does not appear to be driven by genetic incompatibility between morphs

Peri E. Bolton, Lee Ann Rollins, James Brazill-Boast, Kang-Wook Kim, Terry Burke, Simon C. Griffith & K-W. Kim
In socially monogamous species, individuals can use extra-pair paternity and offspring sex allocation as adaptive strategies to ameliorate costs of genetic incompatibility with their partner. Previous studies on domesticated Gouldian finches (Erythrura gouldiae) demonstrated a genetic incompatibility between head colour morphs, the effects of which are more severe in female offspring. Domesticated females use differential sex allocation, and extra-pair paternity with males of compatible head colour, to reduce fitness costs associated with incompatibility in mixed-morph...

Data from: Fine-scale analysis of an assassin bug's behaviour: predatory strategies to bypass the sensory systems of prey

Fernando G. Soley
Some predators sidestep environments that render them conspicuous to the sensory systems of prey. However, these challenging environments are unavoidable for certain predators. Stenolemus giraffa is an assassin bug that feeds on web-building spiders; the web is the environment in which this predator finds its prey, but it also forms part of its preys' sophisticated sensory apparatus, blurring the distinction between environment and sensory systems. Stenolemus giraffa needs to break threads in the web that...

Data from: The relationship between diet and body mass in terrestrial mammals

Silvia Pineda-Munoz, Alistair R. Evans & John Alroy
Diet and body mass are highly important factors in mammalian ecology, and they have also proven to be powerful paleoecological indicators. Our previous research has proposed a new classification scheme for mammals with more dietary divisions that emphasizes the primary resource in a given diet. We analyzed a database summarizing the dietary preferences of 139 species of marsupial and placental terrestrial mammals (including 14 orders) and their average body masses in order to explore whether...

Data from: Gene expression under thermal stress varies across a geographic range expansion front

Lesley Lancaster, Rachael Dudaniec, Pallavi Chauhan, Maren Wellenreuther, Erik Svensson, Bengt Hansson, Lesley T. Lancaster, Rachael Y. Dudaniec & Erik I. Svensson
Many ectothermic species are currently expanding their distributions polewards due to anthropogenic global warming. Molecular genetic mechanisms facilitating range expansion under these conditions are largely unknown, but understanding these could help mitigate expanding pests and disease vectors, or help explain why some species fail to track changing climates. Here, using RNA-seq data, we examine genome-wide changes in gene expression under heat and cold stress in the range-expanding damselfly Ischnura elegans in northern Europe. We find...

Data from: Temporal regularity increases with repertoire complexity in the Australian pied butcherbird’s song

Eathan Janney, Hollis Taylor, Constance Scharff, David Rothenberg, Lucas C. Parra & Ofer Tchernichovski
Music maintains a characteristic balance between repetition and novelty. Here, we report a similar balance in singing performances of free-living Australian pied butcherbirds. Their songs include many phrase types. The more phrase types in a bird's repertoire, the more diverse the singing performance can be. However, without sufficient temporal organization, avian listeners may find diverse singing performances difficult to perceive and memorize. We tested for a correlation between the complexity of song repertoire and the...

Data from: To recycle or steal? Nutrient resorption in Australian and Brazilian mistletoes from three low-phosphorus sites

Marina Corrêa Scalon, Ian J. Wright & Augusto Cesar Franco
Resorption is the process by which nutrients are withdrawn from leaves prior to leaf fall. Mistletoes are generally thought not to rely on nutrient resorption; being xylem-tapping parasites, they instead derive the nutrients required for new growth from their host plant, at little or no cost. We measured nutrient (N, P, K, Ca, Mg) resorption in 18 parasitic mistletoe–host species pairs distributed across three sites with notably low-P soil, also quantifying relationships with leaf lifespan...

Data from: Selection for predation, not female fecundity, explains sexual size dimorphism in the orchid mantises

Gavin J. Svenson, Sydney K. Brannoch, Henrique M. Rodrigues, James C. O'Hanlon & Frank Wieland
Here we reconstruct the evolutionary shift towards floral simulation in orchid mantises and suggest female predatory selection as the likely driving force behind the development of extreme sexual size dimorphism. Through analysis of body size data and phylogenetic modelling of trait evolution, we recovered an ancestral shift towards sexual dimorphisms in both size and appearance in a lineage of flower-associated praying mantises. Sedentary female flower mantises dramatically increased in size prior to a transition from...

Data from: The golden mimicry complex uses a wide spectrum of defence to deter a community of predators

Stano Pekár, Lenka Petráková, Matthew W. Bulbert, Martin J. Whiting & Marie E. Herberstein
Mimicry complexes typically consist of multiple species that deter predators using similar anti-predatory signals. Mimics in these complexes are assumed to vary in their level of defence from highly defended through to moderately defended, or not defended at all. Here, we report a new multi-order mimicry complex that includes at least 140 different putative mimics from four arthropod orders including ants, wasps, bugs, tree hoppers and spiders. All members of this mimicry complex are characterised...

Data from: Incomplete offspring sex bias in Australian populations of the butterfly Eurema hecabe

Darrell J. Kemp, Fiona E. Thomson, Will Edwards & Iñaki Iturbe-Ormaetxe
Theory predicts unified sex ratios for most organisms, yet biases may be engendered by selfish genetic elements such as endosymbionts that kill or feminize individuals with male genotypes. Although rare, feminization is established for Wolbachia-infected Eurema butterflies. This paradigm is presently confined to islands in the southern Japanese archipelago, where feminized phenotypes produce viable all-daughter broods. Here, we characterize sex bias for E. hecabe in continental Australia. Starting with 186 wild-caught females, we reared >6000...

Data from: The genetic basis of discrete and quantitative colour variation in the polymorphic lizard, Ctenophorus decresii

Katrina J. Rankin, Claire A. McLean, Darrell J. Kemp & Devi Stuart-Fox
Background: Colour polymorphic species provide invaluable insight into processes that generate and maintain intra-specific variation. Despite an increasing understanding of the genetic basis of discrete morphs, sources of colour variation within morphs remain poorly understood. Here we use the polymorphic tawny dragon lizard Ctenophorus decresii to test simple Mendelian models for the inheritance of discrete morphs, and to investigate the genetic basis of continuous variation among individuals across morphs. Males of this species express either...

Data from: Cortical reorganisation during a 30-week tinnitus treatment program

Catherine M. McMahon, Ronny K. Ibrahim & Ankit Mathur
Subjective tinnitus is characterised by the conscious perception of a phantom sound. Previous studies have shown that individuals with chronic tinnitus have disrupted sound-evoked cortical tonotopic maps, time-shifted evoked auditory responses, and altered oscillatory cortical activity. The main objectives of this study were to: (i) compare sound-evoked brain responses and cortical tonotopic maps in individuals with bilateral tinnitus and those without tinnitus; and (ii) investigate whether changes in these sound-evoked responses occur with amelioration of...

Data from: Probabilistic divergence time estimation without branch lengths: dating the origins of dinosaurs, avian flight and crown birds

Graeme T. Lloyd, David W. Bapst, Matt Friedman & Katie E. Davis
Branch lengths—measured in character changes—are an essential requirement of clock-based divergence estimation, regardless of whether the fossil calibrations used represent nodes or tips. However, a separate set of divergence time approaches are typically used to date palaeontological trees, which may lack such branch lengths. Among these methods, sophisticated probabilistic approaches have recently emerged, in contrast with simpler algorithms relying on minimum node ages. Here, using a novel phylogenetic hypothesis for Mesozoic dinosaurs, we apply two...

Data from: Three molecular markers show no evidence of population genetic structure in the Gouldian finch (Erythrura gouldiae)

Peri E. Bolton, Andrea J. West, Adam P. A. Cardilini, Jenna A Clark, Kimberley L. Maute, Sarah Legge, James Brazill-Boast, Simon C. Griffith, Lee A. Rollins & Jennalee A. Clark
Assessment of genetic diversity and connectivity between regions can inform conservation managers about risk of inbreeding, potential for adaptation and where population boundaries lie. The Gouldian finch (Erythrura gouldiae) is a threatened species in northern Australia, occupying the savannah woodlands of the biogeographically complex monsoon tropics. We present the most comprehensive population genetic analysis of diversity and structure the Gouldian finch using 16 microsatellite markers, mitochondrial control region and 3,389 SNPs from genotyping-by-sequencing. Mitochondrial diversity...

Data from: Resources for phylogenomic analyses of Australian terrestrial vertebrates

Jason G. Bragg, Sally Potter, Ke Bi, Renee Catullo, Stephen C. Donnellan, Mark D. B. Eldridge, Leo Joseph, J. Scott Keogh, Paul Oliver, Kevin C. Rowe & Craig Moritz
High-throughput sequencing methods promise to improve our ability to infer the evolutionary histories of lineages and to delimit species. These are exciting prospects for the study of Australian vertebrates, a group comprised of many globally unique lineages with a long history of isolation. The evolutionary relationships within many of these lineages have been difficult to resolve with small numbers of loci, and we now know that many lineages also exhibit substantial cryptic diversity. Here, we...

Data from: On the link between functional traits and growth rate: meta-analysis shows effects change with plant size, as predicted

Anaïs Gibert, Emma F. Gray, Mark Westoby, Ian J. Wright & Daniel S. Falster
A plant's growth rate is seen as a central element of its ecological strategy, and as determined by its traits.Yet the literature is inconsistent about the empirical correlation between functional traits and growth, casting doubt on the capacity of some prominent traits to influence growth rate. We propose that traits should influence growth in a way that depends on the size of individual plants. We outline mechanisms and hypotheses based on new theoretical work, and...

Data from: Consistent alleviation of abiotic stress with silicon addition: a meta-analysis

Julia Cooke & Michelle R. Leishman
Hundreds of single species studies have demonstrated the facility of silicon (Si) to alleviate diverse abiotic stresses in plants. Understanding of the mechanisms of Si-mediated stress alleviation is progressing, and several reviews have brought information together. A quantitative assessment of the alleviative capacity of Si, however, which could elucidate plant Si function more broadly, was lacking. We combined the results of 145 experiments, predominantly on agricultural species, in a meta-analysis to statistically assess the responses...

Data from: Association mapping of morphological traits in wild and captive zebra finches: reliable within but not between populations

Ulrich Knief, Holger Schielzeth, Niclas Backstrom, Georg Hemmrich-Stanisak, Michael Wittig, Andre Franke, Simon C. Griffith, Hans Ellegren, Bart Kempenaers & Wolfgang Forstmeier
Identifying causal genetic variants underlying heritable phenotypic variation is a longstanding goal in evolutionary genetics. We previously identified several quantitative trait loci (QTL) for five morphological traits in a captive population of zebra finches (Taeniopygia guttata) by whole-genome linkage mapping. We here follow up on these studies with the aim to narrow down on the quantitative trait variants (QTN) in one wild and three captive populations. First, we performed an association study using 672 single...

Data from: Rates of morphological evolution are heterogeneous in Early Cretaceous birds

Min Wang & Graeme T. Lloyd
The Early Cretaceous is a critical interval in the early history of birds. Exceptional fossils indicate that important evolutionary novelties such as a pygostyle and a keeled sternum had already arisen in Early Cretaceous taxa, bridging much of the morphological gap between Archaeopteryx and crown birds. However, detailed features of basal bird evolution remain obscure because of both the small sample of fossil taxa previously considered and a lack of quantitative studies assessing rates of...

Data from: Sexual and nonsexual cannibalism have different effects on offspring performance in redback spiders

Romain P. Boisseau, Shawn M. Wilder & Katherine L. Barry
Sexual cannibalism is often set apart from other forms of cannibalism; however, no studies have directly compared the fitness consequences of these 2 types of cannibalism. Here, we compared the consequences of cannibalism of a male by a female outside the context of mating (referred to as nonsexual cannibalism) and within the context of mating (referred to as sexual cannibalism) for the propensity to remate, fecundity, and offspring traits of female redback spiders Latrodectus hasselti....

Registration Year

  • 2016
    28

Resource Types

  • Dataset
    28

Affiliations

  • Macquarie University
    28
  • Deakin University
    3
  • Australian National University
    2
  • UNSW Sydney
    2
  • Institute of Vertebrate Paleontology and Paleoanthropology
    1
  • Max Planck Institute for Ornithology
    1
  • South Dakota School of Mines and Technology
    1
  • Hunter College
    1
  • University of Hamburg
    1
  • University of Wollongong
    1