1,643 Works

Data from: Genetic diversity and population structure of the threatened freshwater catfish, Tandanus tandanus, in Victoria, Australia

Erin Hill, Brett A. Ingram, Meaghan Rourke, John Mitchell & Jan M. Strugnell
In Australia, many species of freshwater fish have rapidly declined following European settlement in the late eighteenth century. The freshwater catfish (Tandanus tandanus) is listed as threatened in Victoria and accordingly, broodstock management and a captive breeding program to facilitate the reintroduction of hatchery bred fish into depleted populations have been suggested. Little work has been conducted on Victorian populations of T. tandanus, despite its threatened status. This study assessed the genetic diversity and genetic...

Data from: Nonrandom, diversifying processes are disproportionately strong in the smallest size classes of a tropical forest

Peter T. Green, Kyle E. Harms & Joseph H. Connell
A variety of ecological processes influence diversity and species composition in natural communities. Most of these processes, whether abiotic or biotic, differentially filter individuals from birth to death, thereby altering species’ relative abundances. Nonrandom outcomes could accrue throughout ontogeny, or the processes that generate them could be particularly influential at certain stages. One long-standing paradigm in tropical forest ecology holds that patterns of relative abundance among mature trees are largely set by processes operating at...

Data from: Stress induced gene expression drives transient DNA methylation changes at adjacent repetitive elements

David Secco, Chuang Wang, Huixia Shou, Matthew D. Schultz, Serge Chiarenza, Laurent Nussaume, Joseph R. Ecker, James Whelan & Ryan Lister
Cytosine DNA methylation (mC) is a genome modification that can regulate the expression of coding and non-coding genetic elements. However, little is known about the involvement of mC in response to environmental cues. Using whole genome bisulfite sequencing to assess the spatio-temporal dynamics of mC in rice grown under phosphate starvation and recovery conditions, we identified widespread phosphate starvation-induced changes in mC, preferentially localized in transposable elements (TEs) close to highly induced genes. These changes...

Data from: The evolutionary consequences of blood-stage vaccination on the rodent malaria Plasmodium chabaudi

Victoria C. Barclay, Derek Sim, Brian H. K. Chan, Lucas A. Nell, Maia A. Rabaa, Andrew S. Bell, Robin F. Anders & Andrew F. Read
Malaria vaccine developers are concerned that antigenic escape will erode vaccine efficacy. Evolutionary theorists have raised the possibility that some types of vaccine could also create conditions favoring the evolution of more virulent pathogens. Such evolution would put unvaccinated people at greater risk of severe disease. Here we test the impact of vaccination with a single highly purified antigen on the malaria parasite Plasmodium chabaudi evolving in laboratory mice. The antigen we used, AMA-1, is...

Data from: Habitat disturbance selects against both small and large species across varying climates

Heloise Gibb, Nathan J. Sanders, Robert R. Dunn, Xavier Arnan, Heraldo L. Vasconcellos, David A. Donoso, Alan N. Andersen, Rogerio R. Silva, Tom R. Bishop, Crisanto Gomez, Blair F. Grossman, Kalsum M. Yusah, Sarah H. Luke, Renata Pacheco, Jessica Pearce-Duvet, Javier Retana, Melanie Tista, Catherine L. Parr & H. L. Vasconcelos
Global extinction drivers, including habitat disturbance and climate change, are thought to affect larger species more than smaller species. However, it is unclear if such drivers interact to affect assemblage body size distributions. We asked how these two key global change drivers differentially affect the interspecific size distributions of ants, one of the most abundant and ubiquitous animal groups on earth. We also asked whether there is evidence of synergistic interactions and whether effects are...

Data from: Genetic diversity, population structure and ancestral origin of Australian wheat

Reem Joukhadar, Hans D. Daetwyler, Urmil K. Bansal, Anthony R. Gendall & Matthew J. Hayden
Since the introduction of wheat into Australia by the First Fleet settlers, germplasm from different geographical origins has been used to adapt wheat to the Australian climate through selection and breeding. In this paper, we used 482 cultivars, representing the breeding history of bread wheat in Australia since 1840, to characterize their diversity and population structure and to define the geographical ancestral background of Australian wheat germplasm. This was achieved by comparing them to a...

Data from: Mating patterns and post-mating isolation in three cryptic species of the Engystomops petersi species complex

Paula A. Trillo, Andrea E. Narvaez, Santiago R. Ron & Kim L. Hoke
Determining the extent of reproductive isolation in cryptic species with dynamic geographic ranges can give us important insights into the processes that generate and maintain genetic divergence in the absence of severe geographic barriers. We studied mating patterns, propensity to crossbreed in nature and subsequent fertilization rates, as well as survival and development of hybrid F1 offspring for three species of the E. petersi species complex in Yasuní National Park, Ecuador. We found at least...

Help-seeking preferences among Chinese college students exposed to a natural disaster: a person-centered approach

Wei Shi & Brian J. Hall
Direct exposure to natural disasters is associated with increased mental disorders. Help-seeking behaviour among Chinese adults is low and the barriers and facilitators of help-seeking among Chinese adults exposed to natural disasters is understudied. Using a person-centred approach, this study describes help-seeking preferences and their correlates in a sample of Chinese college students after experiencing Typhoon Hato, the strongest storm to affect Macao, China in the past 50 years. The baseline sample was collected one...

Prey-switching does not protect a generalist turtle from bioenergetic consequences when its preferred food is scarce

James Van Dyke, Kristen Petrov, Ricky-John Spencer, Natasha Malkiewicz, Jessica Lewis & Claudia Keitel
Background: Optimal foraging theory explains how animals make foraging decisions based on the availability, nutritional content, and handling times of different food types. Generalists solve this problem by consuming a variety of food types, and switch between them with relative ease. Specialists eat few food types, and may starve if those food types are not available. We integrated stable isotope analyses with previously-published stomach contents and environmental data to investigate how the foraging ecologies of...

Data from: Plumage color manipulation has no effect on social dominance or fitness in zebra finches

Sofia Jerónimo, Mehdi Khadraoui, Daiping Wang, Katrin Martin, John A. Lesku, Kylie A. Robert, Emmi Schlicht, Wolfgang Forstmeier & Bart Kempenaers
Colourful plumage ornaments may evolve because they play a role in mate choice or in intrasexual competition, acting as signals of species identity or of individual quality. The zebra finch (Taeniopygia guttata) is a model organism for the study of mate choice and its colourful plumage ornaments are thought to be used in both of these contexts. Numerous genetic colour variants have been described for this species, but they are rare in the wild. This...

Data from: Leaf nutrients, not specific leaf area, are consistent indicators of elevated nutrient inputs

Jennifer Firn, James M. McGree, Eric Harvey, Habacuc Flores-Moreno, Martin Schütz, Yvonne M. Buckley, Elizabeth T. Borer, Eric W. Seabloom, Kimberly J. La Pierre, Andrew M. MacDougall, Suzanne M. Prober, Carly J. Stevens, Lauren L. Sullivan, Erica Porter, Emma Ladouceur, Charlotte Allen, Karine H. Moromizato, John W. Morgan, W. Stanley Harpole, Yann Hautier, Nico Eisenhauer, Justin P. Wright, Peter B. Adler, Carlos Alberto Arnillas, Jonathan D. Bakker … & Anita C. Risch
Leaf traits are frequently measured in ecology to provide a ‘common currency’ for predicting how anthropogenic pressures impact ecosystem function. Here, we test whether leaf traits consistently respond to experimental treatments across 27 globally distributed grassland sites across 4 continents. We find that specific leaf area (leaf area per unit mass)—a commonly measured morphological trait inferring shifts between plant growth strategies—did not respond to up to four years of soil nutrient additions. Leaf nitrogen, phosphorus...

Fire and functional traits: using functional groups of birds and plants to guide management in fire-prone, heathy woodland ecosystem

Frederick Rainsford
Aim: Many dry forests and woodlands worldwide are fire-prone and support bird and plant communities shaped by fire. Changes in fire regimes, including the time between fires, have important implications for population trajectories. We studied the responses of bird and plant communities of heathy woodlands to time since the last fire, a key measure underpinning fire management, to evaluate whether current management strategies will enhance conservation of multiple taxa. Location: Otway Ranges, south-eastern Australia. Methods:...

Rural and regional mobilities: exploring the impact of (im)mobilities on rural and regional communities [summary report]

David Radford, Raelene Wilding, Anthony Moran & Martina Boese

Landscape Zones of the Lake Eyre Basin

Gresley Wakelin-King
The dataset divides the Lake Eyre Basin into nine landscape zones, based on the elements that govern form and processes of the surface waters. They are: Uplands, Rocky Fringe, Western Rivers, Northern Plains, Central Plains, Channel Country-Vertic Downs, Channel Country-Stony Domes, Lakes & Dunes, Mega-lakes. This dataset is described in Gresley A. Wakelin-King (2022) Landscapes of the Lake Eyre Basin: the catchment-scale context that creates fluvial diversity, Transactions of the Royal Society of South Australia,...

Uyghurs for sale: ‘Re-education’, forced labour and surveillance beyond Xinjiang

Vicky Xiuzhong Xu, Danielle Cave, James Leibold, Kelsey Munro & Nathan Ruser
No description supplied

Uyghurs for sale: ‘Re-education’, forced labour and surveillance beyond Xinjiang

Vicky Xiuzhong Xu, Danielle Cave, James Leibold, Kelsey Munro & Nathan Ruser
No description supplied

Just Cracking the Surface: Amino Acid Racemization in Archaeological Emu Eggshell

Maddison Crombie
A thesis submitted in total fulfillment of the requirements for the degree of Master of Science to the Department of Archaeology, School of Humanities and Social Sciences, College of Arts, Social Sciences and Commerce, La Trobe University, Victoria, Australia.

Fat-tailed dunnarts (Sminthopsis crassicaudata) of the Werribee grasslands: A case study of a species in decline

Emily Scicluna, BP Gill & Kylie Robert
Grasslands are among the most endangered ecosystems, with <1% of Victorian grasslands remaining. Extinctions of many grassland fauna species have occurred since European settlement due to loss of suitable habitat, and dramatic range reductions continue for those that still exist. Fat-tailed dunnarts (Sminthopsis crassicaudata) are the only small ground-dwelling marsupial known to persist in Victorian grassland habitats. The last long-term targeted surveys for this species were conducted in Victoria in the 1970s. Incidental findings from...

Data from: Low-cost automated flight intercept trap for the temporal sub-sampling of flying insects attracted to artificial light at night

Kylie Robert, Alicia Dimovski, Joel Robert & Stephen Griffiths
Sampling methods are selected depending on the targeted species or the spatial and temporal requirements of the study. However, most methods for passive sampling of flying insects have poor temporal resolution because it is time consuming, costly and/or logistically difficult. Effective sampling of flying insects attracted to artificial light at night (ALAN) requires sampling at user-defined time points (nighttime only) across well-replicated sites resulting in major time and labor-intensive survey effort or expensive automated technologies....

Diverse parentage relationships in paternal mouth-brooders

Janine Abecia, Alison King, Osmar Luiz, David Crook, Dion Wedd & Sam Banks
While mouthbrooding is not an uncommon parental care strategy in fishes, paternal mouthbrooding only occurs in eight fish families and little studied. The high cost of paternal mouthbrooding to the male implies a low risk of investment in another male’s offspring but genetic parentage patterns are poorly known for paternal mouthbrooders. Here we used single nucleotide polymorphism (SNP) genetic data to investigate parentage relationships of broods of two mouthbrooders of northern Australian rivers, mouth almighty...

TSPAN6 is a suppressor of Ras-driven cancer

Patrick Humbert, TZ Pryjda, B Pranjic, A Farrell, K Fujikura, R de Matos Simoes, R Karim, I Kozieradzki, SJF Cronin, GG Neely, TF Meyer, A Hagelkruys, Helena Richardson & JM Penninger
Oncogenic mutations in the small GTPase RAS contribute to ~30% of human cancers. In a Drosophila genetic screen, we identified novel and evolutionary conserved cancer genes that affect Ras-driven tumorigenesis and metastasis in Drosophila including confirmation of the tetraspanin Tsp29Fb. However, it was not known whether the mammalian Tsp29Fb orthologue, TSPAN6, has any role in RAS-driven human epithelial tumors. Here we show that TSPAN6 suppressed tumor growth and metastatic dissemination of human RAS activating mutant...

Sleep loss impairs cognitive performance and alters song output in Australian magpies

Robin Johnsson, F Connelly, J Gaviraghi Mussoi, AL Vyssotski, KE Cain, TC Roth & John Lesku
Sleep maintains optimal brain functioning to facilitate behavioural flexibility while awake. Owing to a historical bias towards research on mammals, we know comparatively little about the role of sleep in facilitating the cognitive abilities of birds. We investigated how sleep deprivation over the full-night (12 h) or half-night (6 h) affects cognitive performance in adult Australian magpies (Cracticus tibicen), relative to that after a night of undisturbed sleep. Each condition was preceded and followed by...

La Trobe eBureau author kit

La Trobe eBureau, La Trobe University Library, Steven Chang & Sebastian Kainey
Author kit for La Trobe academics aiming to publish open educational resources with the La Trobe eBureau.
Includes:* expression of interest form* author proposal template* author copyright agreement* overview of eBureau publishing process

Over the Rainbow Bridge: Animals and Euthanasia

Jessica Ison
No description supplied

MO2, behaviour data and supplementary material for the first physiological evidence of sleep in sharks

Michael Kelly, Selwyn Collins, John Lesku, Jan Hemmi, Shaun Collin & Craig Radford
Sharks represent the earliest group of jawed vertebrates and as such, they may provide original insight for understanding the evolution of sleep in more derived animals. Unfortunately, beyond a single behavioural investigation, very little is known about sleep in these ancient predators. As such, recordings of physiological indicators of sleep in sharks have never been reported. Reduced energy expenditure arising from sustained restfulness and lowered metabolic rate during sleep have given rise to the hypothesis...

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