227 Works

Data from: Creating new evolutionary pathways through bio-invasion: the population genetics of brushtail possums in New Zealand

Stephen D. Sarre, Nicola Aitken, Aaron T. Adamack, Anna J. MacDonald, Bernd Gruber & Phil Cowan
Rapid increases in global trade and human movement have created novel mixtures of organisms bringing with them the potential to rapidly accelerate the evolution of new forms. The common brushtail possum (Trichosurus vulpecula), introduced into New Zealand from Australia in the 19th Century, is one such species having been sourced from multiple populations in its native range. Here, we combine microsatellite DNA and GIS-based spatial data to show that T.vulpecula originating from at least two...

Data from: Global biodiversity assessment and hyper-cryptic species complexes: more than one species of elephant in the room?

Mark Adams, Tarmo A. Raadik, Christopher P. Burridge & Arthur Georges
Several recent estimates of global biodiversity have concluded that the total number of species on Earth lies near the lower end of the wide range touted in previous decades. However, none of these recent estimates formally explore the real ‘elephant in the room’, namely, what proportion of species are taxonomically invisible to conventional assessments, and thus, as undiagnosed cryptic species, remain uncountable until revealed by multi-gene molecular assessments. Here we explore the significance and extent...

Data from: Using genetic techniques to quantify reinvasion, survival and in-situ breeding rates during control/eradication operations

Andrew J. Veale, Kerri-Anne Edge, Peter McMurtrie, Rachel M. Fewster, Mick N. Clout & Dianne M. Gleeson
Determining the origin of individuals caught during a control/eradication program enables conservation managers to assess the reinvasion rates of their target species, and evaluate the level of success of their control methods. We examine how genetic techniques can focus management by distinguishing between hypotheses of ‘reinvasion’ and ‘survivor’, and defining kin groups for invasive stoats (Mustela erminea) on Secretary Island, New Zealand. 205 stoats caught on the island were genotyped at 16 microsatellite loci, along...

Data from: Nitrogen loads influence trophic organization of estuarine fish assemblages

Fiona Y. Warry, Paul Reich, Perran L. M. Cook, Ralph Mac Nally, James R. Thomson & Ryan J. Woodland
Nutrient (N and P) loading may affect functioning in aquatic ecosystems by restructuring producer assemblages with flow-on effects to consumers. Trophic niche occupancy and trophic organization of consumers are key components of ecosystem function that have been increasingly investigated using quantitative isotopic niche indices. These indices are based on the premise that the isotopic values of consumer tissues indicate their assimilated diet. Typically, isotopic niche indices are calculated using only consumer isotope data, which limit...

Data from: Climate variability predicts thermal limits of aquatic insects across elevation and latitude

Alisha A. Shah, Brian A. Gill, Andrea C. Encalada, Alexander S. Flecker, W. Chris Funk, Juan M. Guayasamin, Boris C. Kondratieff, N. LeRoy Poff, Steven A. Thomas, Kelly R. Zamudio & Cameron K. Ghalambor
Janzen's extension of the climate variability hypothesis posits that increased seasonal variation at high latitudes should result in greater temperature overlap across elevations, and favor wider thermal breadths in temperate organisms compared to their tropical counterparts. We tested these predictions by measuring stream temperatures and thermal breadths (i.e. the difference between the critical thermal maximum and minimum) of 62 aquatic insect species from temperate (Colorado, USA) and tropical (Papallacta, Ecuador) streams spanning an elevation gradient...

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: Historical demography and climate driven distributional changes in a widespread Neotropical freshwater species with high economic importance

Manolo Perez, Ezequiel Oliveira, Luiz Bertollo, Carla Gestich, Petr Rab, Tariq Ezaz, Fernando Souza, Patrik Viana, Eliana Feldberg, Edivaldo Herculano Correa De Oliveira & Marcelo Cioffi
The Neotropical region exhibits the greatest worldwide diversity and the diversification history of several clades is related to the puzzling geomorphologic and climatic history of this region. The freshwater Amazon ecoregion contains the main hydrographic basins of the Neotropical region that are highly dendritic and ecologically diverse. It contains a rich and endemic fish fauna, including one of its most iconic and economically important representatives, the bony-tongue Arapaima gigas (Teleostei, Osteoglossiformes). Here, we evaluated the...

Media technologies of the family : Parental anxieties, practices and knowledges in the digital age

Catherine Page Jeffery

Assessing the benefits and risks of translocations in depauperate species: a theoretical framework with an empirical validation

Elise Furlan, Bernd Gruber, Catherine Attard, Robert Wager, Adam Kerezsy, Leanne Faulks, Luciano Beheregaray & Peter Unmack
1. Conservation translocations are becoming more common to assist in the management of threatened native species. While many translocation programs focus on maximizing survival in newly established populations, consideration is also required for the persistence of source populations. 2. Here, we present and test a theoretical framework that assesses the translocation trade-off between increasing a species probability of survival and decreasing a species’ overall genetic diversity. We anticipate that i) the genetic diversity of translocated...

Data from: The genetic architecture of maternal effects across ontogeny in the red deer

Julie Gauzere, Craig A. Walling, Josephine M. Pemberton, Loeske E. B. Kruuk, Sean Morris & Alison Morris
Maternal effects, either environmental or genetic in origin, are an underappreciated source of phenotypic variance in natural populations. Maternal genetic effects have the potential to constrain or enhance the evolution of offspring traits depending on their magnitude and their genetic correlation with direct genetic effects. We estimated the maternal effect variance and its genetic component for twelve traits expressed over the life-history in a pedigreed population of wild red deer (morphology, survival/longevity, breeding success). We...

The ageing brain: investigating the role of physical activity dose on neurocognitive health

Joseph Northey

Trust, power, and tax compliance: evidence from Jakarta, Indonesia

Mardhiah Mardhiah

Data from: Ecological disturbance influences adaptive divergence despite high gene flow in golden perch (Macquaria ambigua): implications for management and resilience to climate change

Catherine R.M. Attard, Chris J. Brauer, Jonathan Sandoval-Castillo, Leanne K. Faulks, Peter Unmack, Dean M. Gilligan, Luciano B. Beheregaray, Peter J. Unmack & Catherine R. M. Attard
Populations that are adaptively divergent but maintain high gene flow may have greater resilience to environmental change as gene flow allows the spread of alleles that have already been tested elsewhere. In addition, populations naturally subjected to ecological disturbance may already hold resilience to future environmental change. Confirming this necessitates ecological genomic studies of high dispersal, generalist species. Here we perform one such study on golden perch (Macquaria ambigua) in the Murray-Darling Basin (MDB), Australia...

Data from: Seasonal shifts in the importance of bottom-up and top-down factors on stream periphyton community structure

Whitney S. Beck, David W. Markman, Isabella A. Oleksy, M. Holliday Lafferty & N. Leroy Poff
We examined the importance of temporal variability in top-down and bottom-up effects on the accumulation of stream periphyton, which are complex associations of autotrophic and heterotrophic microorganisms. Periphyton contributes to primary production and nutrient cycling and serves as a food resource for herbivores (grazers). Periphyton growth is often limited by the availability of nitrogen and phosphorus, and biomass can be controlled by grazers. In this study we experimentally manipulated nutrients and grazers simultaneously to determine...

Data from: On the roles of landscape heterogeneity and environmental variation in determining population genomic structure in a dendritic system

Chris J. Brauer, Peter J. Unmack, Steve Smith, Louis Bernatchez & Luciano B. Beheregaray
Dispersal and natural selection are key evolutionary processes shaping the distribution of phenotypic and genetic diversity. For species inhabiting complex spatial environments however, it is unclear how the balance between gene flow and selection may be influenced by landscape heterogeneity and environmental variation. Here we evaluated the effects of dendritic landscape structure and the selective forces of hydroclimatic variation on population genomic parameters for the Murray River rainbowfish, Melanotaenia fluviatilis across the Murray-Darling Basin, Australia....

Australian perspectives on misinformation

Mathieu O’Neil & Michael Jensen

Policy transfer in privatisation : Thailand's experience with telecommunications

Issariyaporn Chulajata

Power, Politics and Persuasion: The Critical Friend in Public Health Advocacy

Michael Moore

Novel Signal Processing and Classification Methods for Forensic Species Identification

Sorelle Bowman

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  • University of Canberra
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  • Centro de Investigación Biomédica en Red de Salud Mental
  • University of Lucerne
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