44 Works

Data from: The behavioural consequences of sex reversal in dragons

Hong Li, Clare E. Holleley, Melanie Elphick, Arthur Georges & Richard Shine
Sex differences in morphology, physiology, and behaviour are caused by sex-linked genes, as well as by circulating sex-steroid levels. Thus, a shift from genotypic to environmental sex determination may create an organism that exhibits a mixture of male-like and female-like traits. We studied a lizard species (Central Bearded Dragon, Pogona vitticeps), in which the high-temperature incubation of eggs transforms genetically male individuals into functional females. Although they are reproductively female, sex-reversed dragons (individuals with ZZ...

Data from: Parsing the life-shortening effects of dietary protein: effects of individual amino acids

Sara Arganda, Sofia Bouchebti, Sepideh Bazazi, Sophie Le Hesran, Camille Puga, Gérard Latil, Stephen J. Simpson & Audrey Dussutour
High-protein diets shorten lifespan in many organisms. Is it because protein digestion is energetically costly or because the final products (the amino acids) are harmful? To answer this question while circumventing the life-history trade-off between reproduction and longevity, we fed sterile ant workers on diets based on whole proteins or free amino acids. We found that (i) free amino acids shortened lifespan even more than proteins; (ii) the higher the amino acid-to-carbohydrate ratio, the shorter...

Data from: Co-adjustment of yolk antioxidants and androgens in birds

Mathieu Giraudeau & Simon Ducatez
Mothers can shape the developmental trajectory of their offspring through the transmission of resources such as hormones, antioxidants or immunoglobulins. Over the last two decades, an abundant literature on maternal effects in birds has shown that several of these compounds (i.e. androgens, glucocorticoids and antioxidants) often influence the same offspring phenotypic traits (i.e. growth, immunity or oxidative stress levels), making interaction effects between egg components a likely scenario. However, the potential interactive effects of maternally...

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....

Data from: Thyroid hormone modulates offspring sex ratio in a turtle with temperature-dependent sex determination

Bao-Jun Sun, Teng Li, Yi Mu, Jessica K. McGlashan, Arthur Georges, Richard Shine & Wei-Guo Du
The adaptive significance of temperature-dependent sex determination (TSD) has attracted a great deal of research, but the underlying mechanisms by which temperature determines the sex of a developing embryo remain poorly understood. Here, we manipulated the level of a thyroid hormone (TH), triiodothyronine (T3), during embryonic development (by adding excess T3 to the eggs of the red-eared slider turtle Trachemys scripta, a reptile with TSD), to test two competing hypotheses on the proximate basis for...

Data from: Sea urchins in a high-CO2 world: the influence of acclimation on the immune response to ocean warming and acidification

Cecilia J. Brothers, Januar Harianto, James B. McClintock & Maria Byrne
Climate-induced ocean warming and acidification may render marine organisms more vulnerable to infectious diseases. We investigated the effects of warming and acidification on the immune response of the sea urchin Heliocidaris erythrogramma. Sea urchins were gradually introduced to four combinations of temperature and pHNIST (17°C/pH 8.15, 17°C/pH 7.6, 23°C/pH 8.15 and 23°C/pH 7.6) and then held in temperature–pH treatments for 1, 15 or 30 days to determine if the immune response would adjust to stressors...

Data from: Maternal body size influences offspring immune configuration in an oviparous snake

Gregory P. Brown & Richard Shine
Like most ectothermic vertebrates, keelback snakes (Tropidonophis mairii) do not exhibit parental care. Thus, offspring must possess an immune system capable of dealing with challenges such as pathogens, without assistance from an attendant parent. We know very little about immune system characteristics of neonatal reptiles, including the magnitude of heritability and other maternal influences. To identify sources of variation in circulating white blood cell (WBC) concentrations and differentials, we examined blood smears from 246 hatchling...

Data from: Biotic resistance to an alien amphibian: larval competition between Japanese frogs and invasive cane toads

Takashi Haramura, Hirohiko Takeuchi, Michael R. Crossland & Richard Shine
Understanding negative effects of native species on introduced taxa may suggest novel ways to control the invasive species by enhancing such effects. Previous studies have reported that the larvae of invasive cane toads (Rhinella marina) are suppressed by competition with the larvae of native anurans in Australia, but not in North America. We conducted laboratory trials to measure the effect of exposure to the larvae of Japanese frogs (Microhyla ornata, Fejervarya sakishimensis, Rhacophorus owstoni) on...

Data from: Morphological differences between habitats are associated with physiological and behavioural trade-offs in stickleback (Gasterosteus aculeatus)

Frank Seebacher, Mike M. Webster, Rob S. James, Jason Tallis & Ashley J. W. Ward
Local specialization can be advantageous for individuals and may increase the resilience of the species to environmental change. However, there may be trade-offs between morphological responses and physiological performance and behaviour. Our aim was to test whether habitat-specific morphology of stickleback (Gasterosteus aculeatus) interacts with physiological performance and behaviour at different salinities. We rejected the hypothesis that deeper body shape of fish from habitats with high predation pressure led to decreases in locomotor performance. However,...

Data from: Comparative developmental transcriptomics reveals rewiring of a highly conserved gene regulatory network during a major life history switch in the sea urchin genus Heliocidaris

Jennifer W. Israel, Megan L. Martik, Maria Byrne, Elizabeth C. Raff, Rudolf A. Raff, David R. McClay & Gregory A. Wray
The ecologically significant shift in developmental strategy from planktotrophic (feeding) to lecithotrophic (nonfeeding) development in the sea urchin genus Heliocidaris is one of the most comprehensively studied life history transitions in any animal. Although the evolution of lecithotrophy involved substantial changes to larval development and morphology, it is not known to what extent changes in gene expression underlie the developmental differences between species, nor do we understand how these changes evolved within the context of...

Data from: The nutritional balancing act of a large herbivore: an experiment with captive moose (Alces alces L)

Annika M. Felton, Adam Felton, David Raubenheimer, Stephen J. Simpson, Sophie J. Krizsan, Per-Ola Hedwall & Caroline Stolter
The nutrient balancing hypothesis proposes that, when sufficient food is available, the primary goal of animal diet selection is to obtain a nutritionally balanced diet. This hypothesis can be tested using the Geometric Framework for nutrition (GF). The GF enables researchers to study patterns of nutrient intake (e.g. macronutrients; protein, carbohydrates, fat), interactions between the different nutrients, and how an animal resolves the potential conflict between over-eating one or more nutrients and under-eating others during...

Data from: Quantifying and reducing uncertainties in estimated soil CO2 fluxes with hierarchical data-model integration

Kiona Ogle, Edmund Ryan, Fieke A. Dijkstra, Elise Pendall & Feike A. Dijkstra
Non-steady state chambers are often employed to measure soil CO2 fluxes. CO2 concentrations (C) in the headspace are sampled at different times (t), and fluxes (f) are calculated from regressions of C versus t based a limited number of observations. Variability in the data can lead to poor fits and unreliable f estimates; groups with too few observations or poor fits are often discarded, resulting in “missing” f values. We solve these problems by fitting...

Data from: Mitochondrial rate variation among lineages of passerine birds

Jacqueline M. T. Nguyen & Simon Y. W. Ho
The order Passeriformes comprises the majority of extant avian species. Analyses of molecular data have provided important insights into the evolution of this diverse order. However, molecular estimates of the evolutionary and demographic timescales of passerine species have been hindered by a lack of reliable calibrations. This has led to a reliance on the application of standard substitution rates to mitochondrial DNA data, particularly rates estimated from analyses of the gene encoding cytochrome b (CYTB)....

Data from: Evolution of a butterfly dispersal syndrome

Delphine Legrand, Nicolas Larranaga, Romain Bertrand, Simon Ducatez, Olivier Calvez, Virginie M. Stevens & Michel Baguette
The existence of dispersal syndromes contrasting disperser from resident phenotypes within populations has been intensively documented across taxa. However, how such suites of phenotypic traits emerge and are maintained is largely unknown, although deciphering the processes shaping the evolution of dispersal phenotypes is a key in ecology and evolution. In this study, we created artificial populations of a butterfly, in which we controlled for individual phenotypes and measured experimentally the roles of selection and genetic...

Data from: Living in flowing water increases resistance to ultraviolet B radiation

Ensiyeh Ghanizadeh-Kazerouni, Craig E. Franklin & Frank Seebacher
Ultraviolet B radiation (UV-B) is an important environmental driver that can affect locomotor performance negatively by inducing production of reactive oxygen species (ROS). Prolonged regular exercise increases antioxidant activities, which may alleviate the negative effects of UV-B-induced ROS. Animals naturally performing exercise, such as humans performing regular exercise or fish living in flowing water, may therefore be more resilient to the negative effects of UV-B. We tested this hypothesis in a fully factorial experiment, where...

Data from: Constructing an invasion machine: the rapid evolution of a dispersal-enhancing phenotype during the cane toad invasion of Australia

Cameron M. Hudson, Matthew R. McCurry, Petra Lundgren, Colin R. McHenry & Rick Shine
Biological invasions can induce rapid evolutionary change. As cane toads (Rhinella marina) have spread across tropical Australia over an 80-year period, their rate of invasion has increased from around 15 to 60 km per annum. Toads at the invasion front disperse much faster and further than conspecifics from range-core areas, and their offspring inherit that rapid dispersal rate. We investigated morphological changes that have accompanied this dramatic acceleration, by conducting three-dimensional morphometric analyses of toads...

Data from: Selection and constraints on offspring size-number trade-offs in sand lizards (Lacerta agilis)

Gabriella Ljungström, Martin Stjernstedt, Erik Wapstra & Mats Olsson
The trade-off between offspring size and number is a central component of life-history theory, postulating that larger investment into offspring size inevitably decreases offspring number. This trade-off is generally discussed in terms of genetic, physiological or morphological constraints; however, as among-individual differences can mask individual trade-offs, the underlying mechanisms may be difficult to reveal. In this study, we use multivariate analyses to investigate whether there is a trade-off between offspring size and number in a...

Data from: Proto-cooperation: group hunting sailfish improve hunting success by alternating attacks on grouping prey

James E. Herbert-Read, Pawel Romanczuk, Stefan Krause, Daniel Strömbom, Pierre Couillaud, Paolo Domenici, Ralf H.J.M. Kurvers, Stefano Marras, John F. Steffensen, Alexander D.M. Wilson, Jens Krause, Alexander D. M. Wilson & Ralf H. J. M. Kurvers
We present evidence of a novel form of group hunting. Individual sailfish (Istiophorus platypterus) alternate attacks with other group members on their schooling prey (Sardinella aurita). While only 24% of attacks result in prey capture, multiple prey are injured in 95% of attacks, resulting in an increase of injured fish in the school with the number of attacks. How quickly prey are captured is positively correlated with the level of injury of the school, suggesting...

Data from: Ultraviolet B radiation alters movement and thermal selection of zebrafish (Danio rerio)

Frank Seebacher, Ensiyeh Ghanizadeh Kazerouni & Craig E. Franklin
Temperature and ultraviolet B (UV-B) interact in causing cellular damage and impairing locomotor performance. Here, we test the hypothesis that movement and thermal selection of zebrafish (Danio rerio) change in the presence of UV-B, and in particular, that fish which were chronically exposed to UV-B avoid high and low temperature extremes to maximize activities of antioxidant enzymes. Fish chronically (two to three weeks) exposed to UV-B had increased reactive oxygen species (ROS)-induced damage to proteins...

Registration Year

  • 2016
    44

Resource Types

  • Dataset
    44

Affiliations

  • University of Sydney
    44
  • University of Queensland
    5
  • University of Wollongong
    3
  • Oregon State University
    3
  • French National Centre for Scientific Research
    3
  • UNSW Sydney
    3
  • Western Sydney University
    3
  • Duke University
    2
  • University of Tasmania
    2
  • Leibniz Institute of Freshwater Ecology and Inland Fisheries
    2