13 Works

Maternal investment, ecological lifestyle, and brain evolution in sharks and rays

Christopher Mull, Kara Yopak & Nicholas Dulvy
Across vertebrates increased maternal investment (via increased pre- and postnatal provisioning) is associated with larger relative brain size, yet it remains unclear how brain organization is shaped by life history and ecology. Here, we tested whether maternal investment and ecological lifestyle are related to variation in brain size and organization across 100 chondrichthyans. We hypothesized that brain size and organization would vary with level of maternal investment and habitat depth and complexity. We found that...

Data from: Expanded consumer niche widths may signal an early response to spatial protection

Angeleen M. Olson, Rowan Trebilco & Anne K. Salomon
Marine management interventions are increasingly being implemented with the explicit goal of rebuilding ocean ecosystems, but early responses may begin with alterations in ecological interactions preceding detectable changes in population-level characteristics. To establish a baseline from which to monitor the effects of spatial protection on reef fish trophic ecology and track future ecosystem-level changes, we quantified temperate reef fish densities, size, biomass, diets and isotopic signatures at nine sites nested within two fished and one...

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...

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...

λ/4 Retarder Film Measurement from: Polarization of foliar reflectance – novel host plant cue for insect herbivores

Adam Blake, Matthew Go, Gina Hahn, Hayley Grey, Samuel Couture & Gerhard Gries
Insect herbivores exploit plant cues to discern host and non-host plants. Studies of visual plant cues have focused on color despite the inherent polarization sensitivity of insect photoreceptors and the information carried by polarization of foliar reflectance, most notably the degree of linear polarization (DoLP; 0-100%). The DoLP of foliar reflection was hypothesized to be a host plant cue for insects but was never experimentally tested. Here we show that cabbage white butterflies, Pieris rapae...

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...

Data from: Climate impacts on the ocean are making the Sustainable Development Goals a moving target traveling away from us

Gerald G. Singh, Nathalie Hilmi, Joey R. Bernhardt, Andres M. Cisneros Montemayor, Madeline Cashion, Yoshitaka Ota, Sevil Acar, Jason M. Brown, Richard Cottrell, Salpie Djoundourian, Pedro C. Gonzalez-Espinosa, Vicky Lam, Nadine Marshall, Barbara Neumann, Nicolas Pascal, Gabriel Reygondeau, Joacim Rocklov, Alain Safa, Laura R. Virto & William Cheung
1. Climate change is impacting marine ecosystems and their goods and services in diverse ways, which can directly hinder our ability to achieve the Sustainable Development Goals, set out under the 2030 Agenda for Sustainable Development. 2. Through expert elicitation and a literature review, we find that most climate change effects have a wide variety of negative consequences across marine ecosystem services, though most studies have highlighted impacts from warming and consequences to marine species....

Data from: Are there synergistic or antagonistic effects of multiple maternally-derived egg components (antibodies and testosterone) on offspring phenotype?

Roxana Torres, Eunice Chin, Rowan Rampton & Tony D. Williams
Eggs are multivariate in that they contain multiple maternally-derived egg components (e.g. hormones, antibodies, mRNA, antioxidants) which are thought to influence offspring phenotype. However, most studies have focused on single egg components and on short-term effects. Here, we simultaneously manipulated two egg components, maternally-derived antibodies (MAb) and yolk testosterone (T) to assess potential synergistic or antagonistic effects on offspring phenotype from hatching to sexual maturity. We found no evidence for short-or long-term effects of either...

Evaluating the effects of large marine predators on mobile prey behavior across subtropical reef ecosystems

Lindsay Phenix, Dana Tricarico, Mark Bond, Simon Brandl & Austin Gallagher
The indirect effect of predators on prey behavior, recruitment, and spatial relationships continues to attract considerable attention. However, top predators like sharks or large, mobile teleosts, which can have substantial top-down effects in ecosystems, are often difficult to study due to their large size and mobility. This has created a knowledge gap in understanding how they affect their prey through non-consumptive effects. Here we investigated how different functional groups of predators affected potential prey fish...

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...

Data from: Sex and occupation time influence niche space of a recovering keystone predator

Erin U. Rechsteiner, Jane C. Watson, M. Tim Tinker, Linda M. Nichol, Matthew J. Morgan Henderson, Christie J. McMIllan, Mike DeRoos, Marie C. Fournier, Anne K. Salomon, Leah D. Honka & Chris T. Darimont
Predators exert strong effects on ecological communities, particularly when they re-occupy areas after decades of extirpation. Within species, such effects can vary over time and by sex, and cascade across trophic levels. We used a space-for-time substitution to make foraging observations of sea otters (Enhydra lutris) across a gradient of re-occupation (1–30 yrs), and nMDS analysis to ask if 1) sea otter niche space varies as a function of occupation time, and 2) if niche...

Data from: Conserving evolutionary history does not result in greater diversity over geological timescales

Juan Cantalapiedra, Tracy Aze, Marc Cadotte, Giulio Valentino Dalla Riva, Danwei Huang, Florent Mazel, Matthew Pennell, María Ríos & Arne Mooers
Alternative prioritization strategies have been proposed to safeguard biodiversity over macro-evolutionary timescales. The first prioritizes the most distantly related species (maximizing phylogenetic diversity) in the hopes of capturing at least some lineages that will successfully diversify into the future. The second prioritizes lineages that are currently speciating, in the hopes that successful lineages will continue to generate species into the future. These contrasting schemes also map onto contrasting predictions about the role of slow diversifiers...

Data from: Local interactions and their group-level consequences in flocking jackdaws

Hangjian Ling, Guillam E. McIvor, Kasper Van Der Vaart, Richard T. Vaughan, Alex Thornton & Nicholas T. Ouellette
As one of nature’s most striking examples of collective behaviour, bird flocks have attracted extensive research. However, we still lack an understanding of the attractive and repulsive forces that govern interactions between individuals within flocks and how these forces influence neighbours’ relative positions and ultimately determine the shape of flocks. We address these issues by analysing the three-dimensional movements of wild jackdaws (Corvus monedula) in flocks containing 2 to 338 individuals. We quantify the social...

Registration Year

  • 2019

Resource Types

  • Dataset


  • Simon Fraser University
  • University of British Columbia
  • University of Massachusetts Amherst
  • University of Washington
  • Stanford University
  • University of Massachusetts Dartmouth
  • Lebanese American University
  • MRC Laboratory of Molecular Biology
  • The University of Texas at Arlington
  • University of Tasmania