33 Works

Data from: Does parasitoid pressure elicit defensive polyphenism in the green peach aphid?

Yonathan Uriel
Aphids are capable of adapting to parasitoid pressure in the absence of sexual reproduction using epigenetically controlled polyphenism. Asexual lineages of aphids could thus become resistant to parasitoids over time and with repeated exposure, hampering biocontrol efforts that rely on parasitoid wasps. Prior to this study, wing polyphenism and reproductive polyphenism had been reported as parasitoid-adaptive responses in asexual lineages of at least two species of aphids, but it remained unclear whether parasitoid exposure could...

Finding my voice through the arts: Becoming wide-awake to the rhythms of my own drum

Nuri Yang
My thesis is an arts-based inquiry into discovering my voice through poetry, narrative, and Korean drum. My fundamental purpose is to examine what it means to reflect on my lived experiences and to bring my poetic voice onto the page, and into the world. I employ multiple methodologies, including poetic inquiry and embodied ways of inquiry in my exploration of identity. My thesis integrates theoretical and artistic elements which include poems, personal narratives, and a...

Glacial History and Landform Genesis in the Lac de Gras Area, Northwest Territories

Anna Haiblen
The Quaternary geology of the Lac de Gras area was studied by 1:20 000 surficial geology mapping of 770 km2 and investigating the genesis of enigmatic landforms. Three distinct flow directions of the Laurentide Ice Sheet are recorded: flow to the southwest, then west, and finally to the west northwest. Digital mapping with high-resolution orthoimagery and a 30 cm lidar DEM provides insight into the deglacial history. ‘Subglacial meltwater corridors’ are prominent in the area....

Performing identity at the arts edge: Developing radio memoir through the excavation of living inquiry

Elaine Harder
In this thesis, I explore how community radio is a pedagogical and artistic platform that fosters personal agency, memoir, transformation and the unfolding of identity. Within the forum of an arts-based radio program, I witness how music, lyrics, broadcasting and personal reflections merge to inspire the surfacing of life’s lost moments, a collection of personal memories. This discovery evolves into a narrative loop between broadcaster and self, which leads to the excavation and interweaving of...

Data from: The role of behavioural flexibility in primate diversification

Maria Creighton, Dan Greenberg, Simon Reader & Arne Mooers
Identifying the factors that influence species diversification is fundamental to our understanding of the evolutionary processes underlying extant biodiversity. Behavioural innovation, coupled with the social transmission of new behaviours, has been proposed to increase rates of evolutionary diversification, as novel behaviours expose populations to new selective regimes. Thus, it is believed that behavioural flexibility may be important in driving evolutionary diversification across animals. We test this hypothesis within the primates, a taxonomic group with considerable...

Inflation Expectations and Learning about Monetary Policy

David Andolfatto, Scott Hendry & Kevin Moran
Various measures indicate that inflation expectations evolve sluggishly relative to actual inflation. In addition, they often fail conventional tests of unbiasedness. These observations are sometimes interpreted as evidence against rational expectations. The authors embed, within a standard monetary dynamic stochastic general-equilibrium model, an information friction and a learning mechanism regarding the interest-rate-targeting rule that monetary policy authorities follow. The learning mechanism enables optimizing economic agents to distinguish between transitory shocks to the policy rule and...

Data from: Indigenous knowledge of key ecological processes confers resilience to a small-scale kelp fishery

Hannah Kobluk, Keith Gladstone, Mike Reid, Kelly Brown, Kira Krumhansl & Anne Salomon
1. Feedbacks between social and ecological processes can lead to sustainable stewardship practices that support ecological resilience among harvested populations. This is evident along the world’s coast lines, where Indigenous knowledge systems have facilitated millennia of human nature coexistence. However, social-ecological conditions globally are quickly shifting, posing challenges for coastal Indigenous communities where customary harvest of ocean resources, such as kelps, need to adapt to growing markets, novel climates and changing governance regimes. Consequently, a...

Life history and environment predict variation in testosterone across vertebrates

Jerry Husak, Matthew Fuxjager, Michele A. Johnson, Maren Vitousek, Jeremy Donald, Clinton David Francis, Wolfgang Goymann, Michaela Hau, Bonnie Kircher, Rosemary Knapp, Lynn B. Martin, Eliot Miller, Laura Schoenle & Tony Williams
Endocrine systems act as key intermediaries between organisms and their environments. This interaction leads to high variability in hormone levels, but we know little about the ecological factors that influence this variation within and across major vertebrate groups. We study this topic by assessing how various social and environmental dynamics influence testosterone levels across the entire vertebrate tree of life. Our analyses show that breeding season length and mating system are the strongest predictors of...

Zostera marina microsatellite and environmental data

Erin Foster, Jane Watson, Matthew Lemay, Tim Tinker, James Estes, Rebecca Piercey, Lauren Henson, Carol Ritland, Allyson Miscampbell, Linda Nichol, Margot Hessing-Lewis, Anne Salomon & Chris Darimont
Microsatellite data for Zostera marina, sea otter occupancy information, and environmental data from the west coast of British Columbia, Canada.

The role of adaptive behaviour in migratory counts of shorebirds

David Hope
Supplementary Data for Chapter 6 of thesis.

Vascular plant community surveys across different reindeer grazing regimes in the Fennoscandian tundra

Kate Gibson, Johan Oloffson, Arne Mooers & Melanie Monroe
This dataset contains data from the experiment described in "Gibson K., Olofsson, J. Mooers, A. Ø., & Monroe, M. J. (2021) Pulse grazing by reindeer (Rangifer tarandus) can increase the phylogenetic diversity of vascular plant communities in the Fennoscandian tundra. Ecology and Evolution. In press." The data is from a multi-year (2004-2007) quasi-experimental study in Northern Fennoscandia, which was designed to analyze the effect of reindeer grazing on vascular plant community diversity. Our study design...

The role of adaptive behaviour in migratory counts of shorebirds

David Hope
Shorebird population status and trends are commonly generated from counts made at migratory stopovers, where large numbers are concentrated at few locations. Shorebirds migrate long distances, encountering changing and unpredictable conditions. The ability to respond with adjustments in behaviours such as site selection, timing and routing, is likely essential. In this thesis I examine how the adaptive behaviour of migrants affects the use of stopover sites, and hence how many shorebirds are counted. I develop...

Is Donald Trump a trendsetter for Canadians? The effect of Trump and national identity on support for immigration

Steven Nuss
Recent Canadian research highlights a tension. President Trump may be responsible for a potential weakening of the social norms surrounding Canadian identity. Trump’s effect, however, is mitigated when Canadian identity is salient. Given that research shows that Canadians have routinely defined themselves as welcoming of immigrants and multicultural, why Trump has this influence, and the further impact of either Trump himself or Canadian identity on reported support for immigration during the Trump presidency are both...

Predicting the effects of reservoir water level management on the reproductive output of a riparian songbird

David Green
Yellow warblers were monitored in Revelstoke, British Columbia, Canada for 12 breeding seasons spanning 2005 to 2017. Data on the breeding biology of individually marked warblers was used to construct an individual-based model describing the effects of reservoir operations on the reproductive output of yellow warblers. This model was parameterised using data on the breeding biology of approximately 30 breeding pairs per year that a provided data on nest sites (ground elevation and nest height),...

Hydrothermal physiology and climate vulnerability in amphibians

Dan Greenberg & Wendy Palen
All relevant data and code for the analysis from: Greenberg DA, Palen WJ. 2021 Hydrothermal physiology and climate vulnerability in amphibians. Proc. R. Soc. B 20202273. https://doi.org/10.1098/rspb.2020.2273 Data on jump performance (jump_performance_trials.csv), water loss rates and water conservation behaviour in Pacific chorus frogs (treefrog_waterloss.csv), and estimated hours of climate restriction based on thermal physiology and hydothermal physiology (physiological_limits_activity.csv) for three species of anurans from the Pacific Northwest. All R code to conduct each analysis is...

Sugar preferences of Camponotus modoc and Myrmica rubra

Asim Renyard, Regine Gries, Jan Lee, Jaime Chalissery, Sebastian Damin, Robert Britton & Gerhard Gries
A stable source of carbohydrates is essential for the longevity of ant colonies. Foraging ants must select among carbohydrate resources, such as aphid honeydew, that vary based on sugar type, volume and concentration. Using Western carpenter ants, Camponotus modoc, and European fire ants, Myrmica rubra as model species, we tested the hypothesis that ant foraging on aphid honeydew is driven by aphid-specific sugars (unique sugars biosynthesized by aphids) and that ants will selectively consume particular...

Identification of Random Resource Shares in Collective Households Without Preference Similarity Restrictions

Geoffrey Dunbar, Arthur Lewbel & Krishna Pendakur
Resource shares, defined as the fraction of total household spending going to each person in a household, are important for assessing individual material well-being, inequality and poverty. They are difficult to identify because consumption is measured typically at the household level, and many goods are jointly consumed, so that individual-level consumption in multi-person households is not directly observed. We consider random resource shares, which vary across observationally identical households. We provide theorems that identify the...

Data from: Density-dependent effects on reproductive output in a capital breeding carnivore, the northern elephant seal (Mirounga angustirostris)

Daniel Costa, Rachel Holser, Daniel Crocker, Patrick Robinson, Gitte McDonald, Melinda Fowler, Jason Hassrick, Luis Hückstädt, Sarah Peterson, Samantha Simmons & Theresa Keates
All organisms face resource limitations that will ultimately restrict population growth, but the controlling mechanisms vary across ecosystems, taxa, and reproductive strategies. Using four decades of data, we examine how variation in the environment and population density affect reproductive outcomes in a capital-breeding carnivore, the northern elephant seal (Mirounga angustirostris). This species provides a unique opportunity to examine the relative importance of resource acquisition and density-dependence on breeding success. Capital breeders accrue resources over large...

Data for: Nectar-dwelling microbes of common tansy are attractive to its mosquito pollinator, Culex pipiens

Daniel Peach, C. Carroll, S. Meraj, S. Gomes, E. Galloway, A. Balcita, H. Coatsworth, N. Young, Y. Uriel, R. Gries, C. Lowenberger, M. Moore & G. Gries
There is widespread interkingdom signalling between insects and microbes. For example, microbes found in floral nectar may modify its nutritional composition and produce odorants that alter the floral odor bouquet which may attract insect pollinators. Mosquitoes consume nectar and can pollinate flowers. We identified microbes isolated from nectar of common tansy, Tanacetum vulgare , identified the microbial odorants, and tested their effect on attracting the common house mosquito, Culex pipiens . Results We collected 19...

Trans-generational viral transmission and immune priming are dose-dependent

Kenneth Wilson, David Grzywacz, Jenny Cory, Philip Donkersley & Robert Graham
It is becoming increasingly apparent that trans-generational immune priming (i.e. the transfer of the parental immunological experience to its progeny resulting in offspring protection from pathogens that persist across generations) is a common phenomenon not only in vertebrates, but also invertebrates. Likewise, it is known that covert pathogenic infections may become ‘triggered’ into an overt infection by various stimuli, including exposure to heterologous infections. Yet rarely have both phenomena been explored in parallel. Using as...

The Radio Tales

Elaine Harder
One of a series of Radio Tale audio essays recorded at SFU's CJSF Radio Station.

Development and evaluation of an in vitro model of exercise for studying AMPK signaling dynamics in skeletal muscle

Kyle Dumont
Exercise promotes AMP-activated protein kinase (AMPK) signaling in skeletal muscle, where it functions to enhance the expression of fitness-promoting genes. The magnitude of the adaptations depends in part on the dynamics of AMPK signaling; however, the time course of AMPK signaling remains poorly characterized. The purpose of my thesis was to develop and evaluate electrical stimulation of cultured C2C12 myotubes as a method to study AMPK signaling dynamics. I confirmed that differentiation resulted in contractile...

Modeling empathy in embodied conversational agents

Özge Nilay Yalçın
Embodied conversational agents (ECAs) are designed with the goal of achieving natural and effortless interactions with humans by displaying the same communication channels we use in our daily interactions (e.g. gestures, gaze, facial expressions, verbal behaviors). With advances in computational power, these agents are increasingly equipped with social and emotional capabilities to improve interaction with the users. Recently, research efforts are focused on modeling empathy, which is a human trait that allows us to share...

Microfauna at Tse’K’wa: Paleoenvironmental reconstruction in the Peace River Region, Northeast British Columbia

Roxanne Alisha Pendleton
The transition from the late Pleistocene to the early Holocene is known to have been a time of dramatic climatic and environmental changes, however there is still much that is not known about this period in North America. The Peace River Region of Northeast British Columbia is especially interesting because it is located in the hypothesized biogeographic corridor, allowing previously uninhabitable land to become open for colonization by plants, animals and humans at the end...

Data from: Genome-wide analysis reveals demographic and life history patterns associated with habitat modification in land-locked, deep-spawning sockeye salmon (Oncorhynchus nerka)

Farida Samad-Zada, Brett Van Poorten, Shannon Harris, Lyse Godbout & Michael Russello
Human-mediated habitat fragmentation in freshwater ecosystems can negatively impact genetic diversity, demography and life history of native biota, while disrupting the behaviour of species that are dependent on spatial connectivity to complete their life cycles. In the Alouette River system (British Columbia, Canada), dam construction in 1928 impacted passage of anadromous sockeye salmon (Oncorhynchus nerka), with the last records of migrants occurring in the 1930’s. Since that time, O. nerka persisted as a resident population...

Registration Year

  • 2021
    33

Resource Types

  • Dataset
    16
  • Dissertation
    10
  • Text
    5
  • Audiovisual
    2

Affiliations

  • Simon Fraser University
    33
  • Bank of Canada
    5
  • Fisheries and Oceans Canada
    3
  • University of British Columbia
    3
  • University of California, Santa Cruz
    2
  • Max Planck Institute for Ornithology
    1
  • California Polytechnic State University
    1
  • University of Greenwich
    1
  • Trinity University
    1
  • Moss Landing Marine Laboratories
    1