51 Works

When Deleuze and Lacan {finally} Meet :The Singularity (Life) of Art in [Art] Education

Jan Jagodzinski

Managing Risk Taking with Interest Rate Policy and Macroprudential Regulations

Simona E. Cociuba, Malik Shukayev & Alexander Ueberfeldt
We develop a model in which a financial intermediary’s investment in risky assets—risk taking—is excessive due to limited liability and deposit insurance and characterize the policy tools that implement efficient risk taking. In the calibrated model, coordinating interest rate policy with state-contingent macroprudential regulations, either capital or leverage regulation, and a tax on profits achieves efficiency. Interest rate policy mitigates excessive risk taking by altering both the return and the supply of collateralizable safe assets....

Data from: Resource exploitation collapses the home range of an apex predator

Melanie Dickie, Robert Serrouya, Avgar Tal, Philllip McLouglin, Scott McNay, Craig DeMars & Stan Boutin
Optimizing energy acquisition and expenditure is a fundamental trade-off for consumers, strikingly reflected in how mobile organisms use space. Several studies have established that home range size decreases as resource density increases, but the balance of costs and benefits associated with exploiting a given resource density is unclear. We evaluate how the ability of consumers to exploit their resources through movement (termed “resource exploitation”) interacts with resource density to influence home range size. We then...

Data from: The patterns of vascular plant discoveries in China

Muyang Lu, Lianming Gao, Hongtao Li & Fangliang He
Aim 1. To understand geographic patterns of species discovery by examining the effect of growth form, range size, and geographic distribution on discovery probability of vascular plant species in China. 2. To find out which taxa harbor the largest number of undiscovered species and where those species locate. 3. To find out the determinants of province-level mean discovery time and inventory completeness. Location: China Methods We compiled the discovery time and province-level geographic distributions of...

Impacts of male-killing Spiroplasma on the metabolic rate and ectoparasite resistance capacity (endurance) of Drosophila

Collin Horn, Lien Luong & Taekwan Yoon
Ectoparasitic mites are hypothesized to horizontally transmit bacterial endosymbionts, especially male-killing Spiroplasma. In this study we test how Spiroplasma poulsonii MSRO affects fly physiology and behaviour, and potential mite interactions.

Social effects on annual fitness in red squirrels

Andrew McAdam, Quinn Webber, Ben Dantzer, Jeff Lane & Stan Boutin
When resources are limited, mean fitness is constrained and competition can cause genes and phenotypes to enhance an individual’s own fitness while reducing the fitness of their competitors. Negative social effects on fitness have the potential to constrain adaptation, but the interplay between ecological opportunity and social constraints on adaptation remains poorly studied in nature. Here, we tested for evidence of phenotypic social effects on annual fitness (survival and reproductive success) in a long-term study...

Assessing the nutritional consequences of switching foraging behaviour in wood bison

Lee Hecker, Mark Edwards & Scott Neilsen
Diet is one of the most common traits used to organize species of animals into niches. For ruminant herbivores, the breadth and uniqueness of their dietary niche is placed on a spectrum from browsers that consume woody (i.e., browse) and herbaceous (i.e., forbs) plants, to grazers with graminoid-rich diets. However, seasonal changes in plant availability and quality can lead to switching of their dietary niche, even within species. In this study, we examined whether a...

Ancient DNA-based sex determination of bison hide moccasins provides evidence for selective hunting strategies by Promontory Cave occupants

Sabrina Shirazi, Nasreen Broomandkhoshbacht, Jonas Oppenheimer, Jessica Metcalfe, Rob Found, John Ives & Beth Shapiro
The thirteenth-century human occupants of Promontory Cave, Utah, distinguished themselves from surrounding Fremont populations by being successful hunting specialists of bison in a region normally peripheral for that species. The hunters’ success is evident from the abundance of faunal remains excavated from the dry caves, which has facilitated zooarchaeological study of bison hunting strategies. The dry cave conditions also preserved hundreds of worn moccasins, which are of particular interest because of the Canadian-Subarctic style in...

Plant composition of northern temperate pastures and their disturbance history in Alberta, Canada

Lysandra Pyle & Edward Bork
This data set includes the plant composition of 102 pastures sampled in north-central Alberta, Canada. Sampled pastures were located in the Central Parkland and Dry Mixed-Wood natural subregions, and were largely comprised of introduced species. In this study, we examined the influence of pasture disturbance history on vegetation, soil properties, and rangeland health. Disturbance history includes estimates of pasture age, cultivation history, fire history, grazing history (including stocking rates), and other pasture management activities/inputs (manure,...

Medial amygdala ERα expression influences monogamous behavior of male prairie voles in the field

Connor Lambert
Formation of long-term pair-bonds is a complex process, involving multiple neural circuits, and is context- and experience-dependent. While laboratory studies using prairie voles have identified the involvement of several neural mechanisms, efforts to translate these findings into predictable field outcomes have been ambiguous at best. Here we test the hypothesis that inhibition of estrogen receptor alpha (ERα) in the medial amygdala of male prairie voles would significantly increase the expression of social monogamy in the...

Data from: Determinants and long-term costs of early reproduction in males of a long-lived polygynous mammal

Yanny Ritchot, Fanie Pelletier, Marco Festa-Bianchet & David Coltman
In long-lived polygynous species, male reproductive success is often monopolized by a few mature dominant individuals. Young males are generally too small to be dominant and may employ alternative tactics, however, little is known about the determinants of reproductive success for young males. Understanding the causes and consequences of variability in early reproductive success may be crucial to assess the strength of sexual selection and possible long-term trade-offs among life-history traits. Selective pressures driven by...

A screw dislocation located outside, inside or on the interface of a parabolic elastic inhomogeneity

X. Wang & P. Schiavone
Using conformal mapping techniques, superposition and analytic continuation, we derive analytic solutions to the problem of a screw dislocation interacting with a parabolic elastic inhomogeneity. The screw dislocation can be located anywhere either in the surrounding matrix or in the parabolic inhomogeneity or simply on the parabolic interface itself. We obtain explicit expressions for the two analytic functions in the image plane characterizing the elastic fields describing displacement and stresses in the two-phase composite. Using...

How queer!? Canadian approaches to recognizing queer families in the law

Lois Harder
Canada is at the global forefront in providing legal recognition to queer parents. To date, three of its ten provinces (British Columbia, Ontario, and Saskatchewan) will grant parental status to three or more intentional parents and enable their identification on birth registration. All provinces and territories permit the registration of an “other parent” on birth registration, and all jurisdictions enable queer couples to adopt. Notably, these legislative accomplishments have not attracted a great deal of...

Life in Art | Art in Life: Bioart ethics within the Anthropocene

Jan Jagodzinski

Uniform stress field inside a non-parabolic open inhomogeneity interacting with a mode III crack

X. Wang & P. Schiavone
Using conformal mapping techniques, analytic continuation and the theory of Cauchy singular integral equations, we prove that a non-parabolic open inhomogeneity embedded in an elastic matrix subjected to a uniform remote anti-plane stress nevertheless admits an internal uniform stress field despite the presence of a finite mode III crack in its vicinity. Our analysis indicates that: (i) the internal uniform stress field is independent of the specific shape of the inhomogeneity and the presence of...

Memory reactivation in rat medial prefrontal cortex occurs in a subtype of cortical UP state during slow-wave sleep

Soroush Malek, Masami Tatsuno, LeAnna Kalvi, Adrian Ponce-Alvarez, Karim Ali, David R. Euston, Sonja Gruen & Bruce L. McNaughton
Interaction between hippocampal sharp-wave ripples (SWRs) and UP states, possibly by coordinated reactivation of memory traces, is conjectured to play an important role in memory consolidation. Recently, it was reported that SWRs were differentiated into multiple subtypes. However, whether cortical UP states can also be classified into subtypes is not known. Here, we analysed neural ensemble activity from the medial prefrontal cortex from rats trained to run a spatial sequence-memory task. Application of the hidden...

Data from: Topographic and vegetation drivers of thermal heterogeneity along the boreal–grassland transition zone in western Canada: implications for climate change refugia

César Estevo, Diana Stralberg, Scott Nielsen & Erin Bayne
Climate-change refugia are areas that are relatively buffered from contemporary climate change and may be important safe havens for wildlife and plants under anthropogenic climate change. Topographic variation is an important driver of thermal heterogeneity, but it is limited in relatively flat landscapes, such as the boreal plain and prairie regions of western Canada. Topographic variation within this region is mostly restricted to river valleys and hill systems, and their effects on local climates are...

Argos and GPS data for a polar bear track

Marie Auger-Méthé & Andrew E. Derocher
It is rare to be able to validate state-space models for Argos data. This dataset provides a unique opportunity to do so, because it contains simultaneous Argos and GPS data for a polar bear. The GPS locations are extremely accurate (≤30 m) compared to Argos data, which can have errors as large as 36 km depending on the quality class. The dataset contains one year of movement data, starting on April 20, 2009. The dataset...

Progressive neurochemical abnormalities in cognitive and motor subgroups of ALS: a prospective multicentre study

Daniel Ta, Abdullah Ishaque, Ojas Srivastava, Chris Hanstock, Peter Seres, Dean Eurich, Collin Luk, Hannah Briemberg, Richard Frayne, Angela Genge, Simon Graham, Lawrence Korngut, Lorne Zinman & Sanjay Kalra
Objective: To evaluate progressive cerebral degeneration in amyotrophic lateral sclerosis (ALS) by assessing alterations in N-acetylaspartate (NAA) ratios in the motor and prefrontal cortex within clinical subgroups of ALS. Methods: Seventy-six ALS patients and 59 healthy controls were enrolled a prospective, longitudinal, multicenter study in the Canadian ALS Neuroimaging Consortium (CALSNIC). Participants underwent serial clinical evaluations and MRS at baseline, 4 and 8 months using a harmonized protocol across 5 centers. NAA ratios were quantified...

Genomic distinctness despite shared color patterns among threatened populations of a tiger beetle

Rowan French, Aaron Bell, Kiara Calladine, John Acorn & Felix Sperling
Conservation biologists have long debated the value of subspecies, which are morphologically and geographically identifiable but not necessarily evolutionarily distinctive. One example of a controversial subspecies is Cicindela formosa gibsoni, a tiger beetle that is nationally listed as threatened in Canada and whose taxonomic status is based primarily on its unique elytral (forewing) color pattern. To determine whether C. f. gibsoni represents one or more genetically distinctive units, we sampled 14 populations within or near...

Snaps of a tiny amphipod push the boundary of ultrafast, repeatable movement

Sarah Longo, William Ray, Grace Farley, Jacob Harrison, Justin Jorge, Tomonari Kaji, A. Richard Palmer & Sheila Patek
Surprisingly, the fastest motions are not produced by large animals or robots. Rather, small organisms or structures, including cnidarian stinging cells, fungal shooting spores, and mandible strikes of ants, termites, and spiders hold the world acceleration records. These diverse systems share common features: they rapidly convert potential energy - stored in deformed material or fluid - into kinetic energy when a latch is released. However, the fastest and smallest known movements often cannot be used...

Data from: Proximity to parasites reduces host fitness independent of infection in a Drosophila-Macrocheles system

Collin Horn & Lien Luong
We assayed the longevity and reproductive output of Drosophila nigrospiracula exposed or not exposed to ectoparasitic Macrocheles subbadius accross a mesh barrier. As such we measured the non-consumptive effects (extending the ecology of fear to host-parasite systems) of an ectoparasite on host fecundity and survival. We found that exposure to mites, without infection, caused flies to live shorter lives and produce fewer offspring.

Data from: Trade-offs between reproduction and behavioural resistance against ectoparasite infection

Collin Horn
In these experiments we tested if 1) mated female flies (Drosophila nigrospiracula) are more vulnerable to ectoparasite mite (Macrocheles subbadius) infection then unmated conspecifics. 2) If a rest period to recover from male harassment following mating improved resistance to mites and 3) if reduced endurance following mating may explain differential resistance abilities between mated and unmated female flies.

Traditional land use, management and biodiversity of European semi-natural grasslands – Editorial to the 15th EDGG Special Feature

Steffen Boch, Thomas Becker, Balázs Deák, Jürgen Dengler & Viktoria Wagner
Seit 15 Jahren geben Mitglieder der Eurasian Dry Grassland Group (EDGG) und deren Vorgänger-organisationen Grasland-Sonderausgaben (Special Features) in Tuexeniaheraus. Das diesjährige Special Feature mit dem Titel Traditionelle Landnutzung, Management und Biodiversität von halb-natürlichem Grasland in Europa umfasst acht Artikel, die viele Aspekte der Graslandforschung beleuchten und verschiedene Organismengruppen miteinbeziehen: JANIŠOVÁ et al. (2020a) untersuch-ten den Einfluss verschiedener traditioneller Landnutzungsformen auf den Artenreichtum des extensi-ven Graslands im Apuseni-Gebirge in Westrumänien. LABADESSA et al.(2020) verglichen die Arten-zusammensetzung...

Monetary Policy Tradeoffs Between Financial Stability and Price Stability

Malik Shukayev & Alexander Ueberfeldt
We analyze the impact of interest rate policy on financial stability in an environment where banks can experience runs on their short-term liabilities, forcing them to sell assets at fire-sale prices. Price adjustment frictions and a state-dependent risk of financial crisis create the possibility of a policy tradeoff between price stability and financial stability. Focusing on Taylor rules with monetary policy possibly reacting to banks’ short-term liabilities, we find that the optimized policy uses the...

Registration Year

  • 2021
    51

Resource Types

  • Dataset
    38
  • Journal Article
    5
  • Text
    5
  • Data Paper
    2
  • Conference Paper
    1

Affiliations

  • University of Alberta
    51
  • University of Saskatchewan
    3
  • McGill University
    3
  • East China University of Science and Technology
    3
  • Chinese Academy of Sciences
    3
  • University of British Columbia
    3
  • Alberta Biodiversity Monitoring Institute
    2
  • Utah State University
    2
  • German Center for Integrative Biodiversity Research
    2
  • University of Freiburg
    2