142 Works

Code, data and supplementary material from: Analyzing phylogenetic trees with a tree lattice coordinate system and a graph polynomial

Pengyu Liu, Priscila Biller, Matthew Gould & Caroline Colijn
This dataset includes code, used and generated data for the experiments in the paper Analyzing Phylogenetic Trees with a Tree Lattice Coordinate System and a Graph Polynomial, and the supplementary material of the paper. The paper introduces representation and comparison methods for rooted unlabelled phylogenetic trees based on a tree lattice that serves as a coordinate system for rooted binary trees with branch lengths and a graph polynomial that fully characterizes tree shapes. The methods...

Dissociating Affective and Perceptual Effects of Schematic Faces on Attentional Scope

Regard Booy
Attention allocation to positive and negative stimuli differ. For example, the flanker interference asymmetry describes a pattern of results on flanker tasks using emotional stimuli, where a typical flanker interference effect is observed for positive targets, but not for negative targets. There are two dominant explanations for the flanker interference asymmetry. According to the emotion-first explanation, negative targets are preferentially processed to facilitate the processing of potentially threatening stimuli. In contrast, feature-first explanations, argue that...

3D data obtained with a MicroScribe digitising arm and photogrammetry to address bioarchaeological research questions

Kimberly Plomp, Mark Collard & Keith Dobney
Virtual methods for studying human remains are becoming increasingly popular in bioarchaeology, and the rate of technological innovation in the last few years has been such that we now have multiple options to choose from when collecting data. This raises the question of whether datasets generated with different methods are transposable. In the study reported here, we investigated whether it is valid to combine 3D data obtained with a MicroScribe digitising arm and 3D data...

Data and analysis from: Body mass, temperature, and depth shape the maximum intrinsic rate of population increase in sharks and rays

Sebastián A. Pardo & Nicholas K. Dulvy
An important challenge in ecology is to understand variation in species’ maximum intrinsic rate of population increase, 𝑟𝑚𝑎𝑥, not least because 𝑟𝑚𝑎𝑥 underpins our understanding of the limits of fishing, recovery potential, and ultimately extinction risk. Across many vertebrate species, terrestrial and aquatic, body mass and environmental temperature are important correlates of 𝑟𝑚𝑎𝑥. In sharks and rays, specifically, 𝑟𝑚𝑎𝑥 is known be lower in larger species, but also in deep-sea ones. We use an information-theoretic...

Temporally varying disruptive selection in the medium ground finch (Geospiza fortis).

Marc-Olivier Beausoleil, Luke Frishkoff, Leithen M'Gonigle, Joost Raeymaekers, Sarah Knutie, Luis De León, Sarah Huber, Jaime Chaves, Dale Clayton, Jennifer Koop, Jeffrey Podos, Diana Sharpe, Andrew Hendry & Rowan Barrett
Disruptive natural selection within populations exploiting different resources is considered to be a major driver of adaptive radiation and the production of biodiversity. Fitness functions, which describe the relationships between trait variation and fitness, can help to illuminate how this disruptive selection leads to population differentiation. However, a single fitness function represents only a particular selection regime over a single specified time period (often a single season or a year), and therefore might not capture...

The effect of stiffened diabetic red blood cells on wall shear stress in a reconstructed 3D microaneurysm

Benjamin Czaja, Jonathan de Bouter, Morgan Heisler, Gábor Závodszky, Sonja Karst, Marinko Sarunic, David Maberley & Alfons Hoekstra
Blood flow within the vasculature of the retina has been found to influence the progression of diabetic retinopathy. In this research cell resolved blood flow simulations are used to study the pulsatile flow of whole blood through a segmented retinal microaneurysm. Images were collected using adaptive optics optical coherence tomography of the retina of a patient with diabetic retinopathy, and a sidewall (sacciform) microaneurysm was segmented from the volumetric data. The original microaneurysm neck width...

Data from: Hydrocarbon divergence and reproductive isolation in Timema stick insects

Tanja Schwander, Devin Arbuthnott, Regine Gries, Gerhard Gries, Patrik Nosil & Bernard J. Crespi
Background: Individuals commonly prefer certain trait values over others when choosing their mates. If such preferences diverge between populations, they can generate behavioral reproductive isolation and thereby contribute to speciation. Reproductive isolation in insects often involves chemical communication, and cuticular hydrocarbons, in particular, serve as mate recognition signals in many species. We combined data on female cuticular hydrocarbons, interspecific mating propensity, and phylogenetics to evaluate the role of cuticular hydrocarbons in diversification of Timema walking-sticks....

Data from: Correlated evolution of mating system and floral display traits in flowering plants and its implications for the distribution of mating system variation

Carol Goodwillie, Risa D. Sargent, Susan Kalisz, Richard H. Ree, David A. Moeller, Mario Vallejo-Marin, Christopher G. Eckert, Alice A. Winn, Elizabeth Elle, Monica A. Geber & Mark O. Johnston
Reduced allocation to structures for pollinator attraction is predicted in selfing species. We explored the association between outcrossing and floral display in a broad sample of angiosperms. We used the demonstrated relationship to test for bias against selfing species in the outcrossing rate distribution, the shape of which has relevance for the stability of mixed mating. Relationships between outcrossing rate, flower size, flower number and floral display, measured as the product of flower size and...

Physiological maturity at a critical life‐history transition and flight ability at fledging

Allison Cornell, Kate F. Gibson & Tony D. Williams
Developmental maturity (e.g. body condition, body mass) at major life-history transitions is known to affect fitness across a wide range of taxa. Fledging (leaving the nest), a major life-history transition in birds, is associated with high post-fledging mortality and is widely assumed to be related to poor initial flight ability of fledglings, which, in turn, might be related to developmental maturity at fledging. We investigated individual variation in developmental maturity of both somatic and physiological...

Data from: Field crickets compensate for unattractive static long-distance call components by increasing dynamic signalling effort

Emily M. McAuley & Susan M. Bertram
The evolution of multiple sexual signals presents a dilemma since individuals selecting a mate should pay attention to the most honest signal and ignore the rest; however, multiple signals may evolve if, together, they provide more information to the receiver than either one would alone. Static and dynamic signals, for instance, can act as multiple messages, providing information on different aspects of signaller quality that reflect condition at different time scales. While the nature of...

Data from: Amphibian species' traits, evolutionary history, and environment predict Batrachochytrium dendrobatidis infection patterns, but not extinction risk

Dan A. Greenberg, Wendy J. Palen & Arne Ø. Mooers
The fungal pathogen Batrachochytrium dendrobatidis (Bd) has emerged as a major agent of amphibian extinction, requiring conservation intervention for many susceptible species. Identifying susceptible species is challenging, but many aspects of species’ biology are predicted to influence the evolution of host resistance, tolerance, or avoidance strategies towards disease. In turn, we may expect species exhibiting these distinct strategies to differ in their ability to survive epizootic disease outbreaks. Here we test for phylogenetic and trait-based...

Data from: Sudden collapse of a mesopredator reveals its complementary role in mediating rocky reef regime shifts

Jenn M. Burt, Tim M. Tinker, Daniel K. Okamoto, Kyle W. Demes, Keith Holmes & Anne K. Salomon
While changes in the abundance of keystone predators can have cascading effects resulting in regime shifts, the role of mesopredators in these processes remains underexplored. We conducted annual surveys of rocky reef communities that varied in the recovery of a keystone predator (sea otters Enhydra lutris) and the mass mortality of a mesopredator (sunflower sea star Pycnopodia helianthoides) due to an infectious wasting disease. By fitting a population model to empirical data, we show that...

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

Roxanne 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: Geometric models to explore mechanisms of dynamic shape change in skeletal muscle

Taylor J.M. Dick, James M. Wakeling & Taylor J. M. Dick
Skeletal muscle bulges when it contracts. These 3-dimensional (3D) dynamic shape changes play an important role in muscle performance by altering the range of fascicle velocities over which a muscle operates. However traditional muscle models are 1D and cannot fully explain in vivo shape changes. In this study we compared medial gastrocnemius behaviour during human cycling (fascicle length changes and rotations) predicted by a traditional 1D Hill-type model and by models that incorporate 2D and...

Data from:Physiological effects of increased foraging effort in a small passerine

Kang Nian Yap, Oh Run Kim, Karilyn C Harris & Tony D Williams
Foraging to obtain food, either for self-maintenance or at presumably elevated rates to provision offspring, is thought to be an energetically demanding activity but one that is essential for fitness (higher reproductive success and survival). Nevertheless, the physiological mechanisms that allow some individuals to support higher foraging performance, and the mechanisms underlying costs of high workload, remain poorly understood. We experimentally manipulated foraging behaviour in zebra finches (Taeniopygia guttata) using the technique described by Koetsier...

Data from: Maintenance costs of male dominance and sexually antagonistic selection in the wild

Zbyszek Boratynski, Esa Koskela, Tapio Mappes, Suzanne C. Mills & Mikael Mokkonen
1. Variation in dominance status determines male mating and reproductive success, but natural selection for male dominance can be detrimental or antagonistic for female performance, and ultimately their fitness. Attaining and maintaining a high dominance status in a population of competing individuals is physiologically costly for males. But how male dominance status is mediated by maintenance energetics is currently not well understood, nor are the correlational effects of male energetics on his sisters recognized. 2....

Data from: Genomic predictions and genome-wide association study of resistance against Piscirickettsia salmonis in coho salmon (Oncorhynchus kisutch) using ddRAD sequencing

Agustin Barría, Kris A. Christensen, Grazyella M. Yoshida, Katharina Correa, Ana Jedlicki, Jean Paul Lhorente, William S. Davidson & José Manuel Yáñez
Piscirickettsia salmonis is one of the main infectious diseases affecting coho salmon (Oncorhynchus kisutch) farming, and current treatments have been ineffective for the control of this disease. Genetic improvement for P. salmonis resistance has been proposed as a feasible alternative for the control of this infectious disease in farmed fish. Genotyping by sequencing (GBS) strategies allow genotyping of hundreds of individuals with thousands of single nucleotide polymorphisms (SNPs), which can be used to perform genome...

Data from: Higher rates of pre‐breeding condition gain positively impacts clutch size: a mechanistic test of the condition‐dependent individual optimization model

Holly L. Hennin, Cody J. Dey, Joel Bety, H. Grant Gilchrist, Pierre Legagneux, Tony D. Williams & Oliver P. Love
1. A combination of timing of and body condition (i.e., mass) at arrival on the breeding grounds interact to influence the optimal combination of the timing of reproduction and clutch size in migratory species. This relationship has been formalized by Rowe et al. in a condition-dependent individual optimization model (American Naturalist, 1994, 143, 689-722), which has been empirically tested and validated in avian species with a capital-based breeding strategy. 2. This model makes a key,...

Barn Swallow (Hirundo rustica) fledglings use crop habitat more frequently in relation to its availability than pasture and other habitat types

Chloe Boynton
Populations of birds that forage on aerial insects have been declining across North America for several decades, but the main causes of and reasons for geographical variation in these declines remains unclear. We examined the habitat use and survival of post-fledging Barn Swallows (Hirundo rustica), near Vancouver, BC, Canada using VHF radio telemetry. We predicted that fledgling Barn Swallows hatched in higher quality natal habitat (pasture) would fledge at higher quality, stay closest to the...

Supplementary data for: Mosquito phytophagy – sources exploited, ecological function, and evolutionary transition to haematophagy

Daniel Peach & Gerhard Gries
This dataset consists of two files: Floral visitation records of mosquitoes Plant sugar, primarily in the form of floral nectar, is the ubiquitous basic food of adult mosquitoes. However, records of mosquito floral visitation are not usually the focus of research publications and, as such, are often reported as secondary parts of larger studies and are scattered throughout more than a century of scientific literature. Here we provide a summary of more than 500 recorded...

Custom MALDI-TOF Mass Spectrometric Database for identification of environmental Burkholderia and related genera

Roger Linington
Success of microbial natural products discovery programs is dependent on quick and concise discrimination between isolates from diverse environments. However, laboratory isolation and identification of priority genera using current 16S rRNA PCR-based methods is both challenging and time-consuming. In clinical settings, MALDI-TOF MS is used to rapidly identify unknown bacterial pathogens, yet this has not been widely adapted for isolation of environmental bacteria. To expedite isolation of Gram-negative proteobacterial order Burkholderiales, we have created a...

Data from: A range-wide domino effect and resetting of the annual cycle in a migratory songbird

Elizabeth A. Gow, Lauren Burke, David W. Winkler, Samantha M. Knight, Robert G. Clark, Marc Bélisle, Lisha L. Berzins, Tricia Blake, Eli S. Bridge, Russell D. Dawson, Peter O. Dunn, Dany Garant, Geoff Holroyd, Andrew G. Horn, David J.T. Hussell, Olga Lansdorp, Andrew J. Laughlin, Marty L. Leonard, Fanie Pelletier, Dave Shutler, Lynn Siefferman, Caz M. Taylor, Helen Trefry, Carol M. Vleck, David Vleck … & D. Ryan Norris
Latitudinal differences in timing of breeding are well documented but how such differences carry over to influence timing of events in the annual cycle of migratory birds is not well understood. We examined geographic variation in timing of events throughout the year using light-level geolocator tracking data from 133 migratory tree swallows (Tachycineta bicolor) originating from 12 North American breeding populations. A swallow’s breeding latitude influenced timing of breeding, which then carried over to affect...

Data from: EFHC1, implicated in juvenile myoclonic epilepsy, functions at the cilium and synapse to modulate dopamine signaling

Catrina M. Loucks, Kwangjin Park, Denise S. Walker, Andrea H. McEwan, Tiffany A. Timbers, Evan L. Ardiel, Laura J. Grundy, Chunmei Li, Jacque-Lynne Johnson, Julie Kennedy, Oliver E. Blacque, William R. Schafer, Catharine H. Rankin & Michel R. Leroux
Neurons throughout the mammalian brain possess non-motile cilia, organelles with varied functions in sensory physiology and cellular signaling, yet their roles in these neurons are poorly understood. To shed light into their functions, we studied EFHC1, an evolutionarily conserved protein required for motile cilia function and linked to a common form of inherited epilepsy in humans, juvenile myoclonic epilepsy (JME). We demonstrate that C. elegans EFHC1 functions within specialized non-motile mechanosensory cilia, where it regulates...

Data from: Testosterone reduces the threat premium in competitive resource division

Shawn N. Geniole, Valentina Proietti, Brian M. Bird, Triana L. Ortiz, Pierre L. Bonin, Bernard Goldfarb, Neil V. Watson & Justin M. Carré
Like other animals, humans are sensitive to facial cues of threat. Recent evidence suggests that we use this information to dynamically calibrate competitive decision-making over resources, ceding more to high threat individuals (who appear more willing/able to retaliate) and keeping more from low threat individuals. Little is known, however, about the biological factors that support such threat assessment and decision-making systems. In a pre-registered, placebo-controlled, cross-over testosterone administration study (n = 118 men), we show...

Is Donald Trump a Trendsetter for Canadians? The Effect of Trump and National Identity on Support for Immigration

Steven Nuss & Mark Pickup
Data includes demographic variables, as well as an imbedded experiment to see whether Trump can influence Canadians’ support for immigrants and if priming Canadian national identity using normative associations about immigration and multiculturalism reinforces or weakens support for immigrants. Data also includes variables to see if Canadians view Trump as trendsetter, and their current attitudes on desired levels of immigration. Full codebook is located in the appendix of Nuss (2020) "Is Donald Trump a Trendsetter...

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Affiliations

  • Simon Fraser University
    142
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