93 Works

Data from: Integrating complementary methods to improve diet analysis in fishery-targeted species

Jordan K. Matley, Gregory E. Maes, Floriaan Devloo-Delva, Roger Huerlimann, Gladys Chua, Andrew J. Tobin, Aaron T. Fisk, Colin A. Simpfendorfer & Michelle R. Heupel
Developing efficient, reliable, cost-effective ways to identify diet is required to understand trophic ecology in complex ecosystems and improve food web models. A combination of techniques, each varying in their ability to provide robust, spatially and temporally explicit information can be applied to clarify diet data for ecological research. This study applied an integrative analysis of a fishery-targeted species group - Plectropomus spp.in the central Great Barrier Reef, Australia by comparing three diet-identification approaches. Visual...

Data from: Large-scale oceanographic fluctuations drive Antarctic petrel survival and reproduction

Sebastien Descamps, Arnaud Tarroux, Svein Håkon Lorentsen, Oliver P. Love, Øystein Varpe & Nigel G. Yoccoz
Polar Regions are experiencing environmental changes at unprecedented rates. These changes can spread throughout entire food webs from lower trophic levels to apex predators. As many top predators forage over large areas, these indirect effects may be associated with large-scale patterns of climate variability. Using global climate indices that are known to impact the Southern Ocean ecosystem (the El Niño Southern Oscillation and Antarctic Oscillation Indices) we assessed their efficacy to predict variation in the...

Data from: Metabolic traits of westslope cutthroat, introduced rainbow trout and their hybrids in an ecotonal hybrid zone along an elevation gradient

Joseph B. Rasmussen, Michael D. Robinson, Alice Hontela & Daniel D. Heath
In the Upper Oldman River, Alberta, introduced non-native hatchery rainbow trout hybridize with native westslope cutthroat trout, resulting in a hybrid swarm. Rainbow trout dominate at low elevations (<1250 m) in the river mainstem, cutthroat in high elevation tributaries (>1400 m), and hybrids are numerically dominant in the mid-elevation range. We hypothesized that metabolism of rainbow trout would exceed that of cutthroat trout, and that the elevation gradient in genetic makeup would be mirrored by...

Data from: Variation in juvenile Chinook salmon (Oncorhynchus tshawytscha) transcription among and within eight population crosses from British Columbia, Canada

Shelby D. Toews, Kyle W. Wellband, Brian Dixon & Daniel D. Heath
Phenotypic differences among populations within a species have been reported for a variety of traits, ranging from life history to physiology to gene transcription. Population-level phenotypic variation has been attributed to genetic differences resulting from genetic drift and/or local adaptation as well as environmental differences resulting from plasticity. We studied population- and family-level variation in gene transcription for 22 fitness-related genes, comprising immune, growth, metabolic, and stress processes in Chinook salmon (Oncorhynchus tshawytscha). We created...

Data from: Habitat or temporal isolation: unravelling herbivore-parasitoid speciation patterns using double digest RADseq

Y. Miles Zhang, Amber I.H. Bass, D. Catalina Fernandez, Barbara J. Sharanowski & Amber I. H. Bass
Ecological speciation is often observed in phytophagous insects and their parasitoids due to divergent selection caused by host-associated or temporal differences. Most previous studies have utilized limited genetic markers or distantly related species to look for reproductive barriers of speciation. In our study we focus on closely related species of Lygus bugs and two sister species of Peristenus parasitoid wasps. Using mitochondrial DNA COI and genome wide SNPs generated using ddRADseq, we tested for potential...

Data from: Flexible response to short-term weather in a cold-adapted songbird

Marie-Pier Laplante, Emily A. McKinnon, Oliver P. Love & François Vézina
To improve survival during winter, temperate species use a variety of behavioural and physiological adaptations. Among songbirds, the maintenance of lipid reserves is a widely-used strategy to cope with the severity of winter; however, little is known regarding how multiple synchronously acting environmental mechanisms work together to drive these effects. In a context where temperate winter conditions are becoming more variable, it is important to widen our understanding regarding the flexible adaptations that may allow...

Data from: Genomics and telemetry suggest a role for migration harshness in determining overwintering habitat choice, but not gene flow, in anadromous Arctic Char

Jean-Sébastien Moore, Les N. Harris, Jérémy Le Luyer, Ben J.G. Sutherland, Quentin Rougemont, Ross F. Tallman, Aaron T. Fisk & Louis Bernatchez
Migration is a ubiquitous life history trait with profound evolutionary and ecological consequences. Recent developments in telemetry and genomics, when combined, can bring significant insights on the migratory ecology of non-model organisms in the wild. Here, we used this integrative approach to document dispersal, gene flow and potential for local adaptation in anadromous Arctic Char from six rivers in the Canadian Arctic. Acoustic telemetry data from 124 tracked individuals indicated asymmetric dispersal, with a large...

Data from: Parallel evolutionary forces influence the evolution of male and female songs in a tropical songbird

Brendan A. Graham, Daniel D. Heath, Ryan P. Walter, Melissa M. Mark & Daniel J. Mennill
Given the important role that animal vocalizations play in mate attraction and resource defence, acoustic signals are expected to play a significant role in speciation. Most studies, however, have focused on the acoustic traits of male animals living in the temperate zone. In contrast to temperate environments, in the tropics it is commonplace for both sexes to produce complex acoustic signals. Therefore tropical birds offer the opportunity to compare the sexes and provide a more...

Data from: Redder isn’t always better: cost of carotenoids in Chinook salmon eggs

Sarah J. Lehnert, Robert H. Devlin, Trevor E. Pitcher, Christina A.D. Semeniuk & Daniel D. Heath
Carotenoids provide animals with many fitness benefits through increased mating success, immune function, gamete quality, and antioxidant capacity. Despite these benefits, carotenoids are not utilized equally by all animals, implying trade-offs associated with the pigments; although, few studies have quantified fitness costs of carotenoid pigmentation. Salmon are known for their conspicuous red coloration; however, amongst Chinook salmon (Oncorhynchus tshawytscha), a natural genetic color polymorphism exists (red and white morphs) which results in carotenoid-based color differences...

Data from: Unpredictable perturbation reduces breeding propensity regardless of pre-laying reproductive readiness in a partial capital breeder

Pierre Legagneux, Holly L. Hennin, H. Grant Gilchrist, Tony D. Williams, Oliver P. Love & Joël Bêty
Theoretically, individuals of migratory species should optimize reproductive investment based on a combination of timing of and body condition at arrival on the breeding grounds. A minimum threshold body mass is required to initiate reproduction, and the timing of reaching this threshold is critical because of the trade-off between delaying breeding to gain in condition against the declining value of offspring with later reproductive timing. Long-lived species have the flexibility within their life history to...

Data from: Feather corticosterone reveals effect of moulting conditions in the autumn on subsequent reproductive output and survival in an Arctic migratory bird

N. Jane Harms, Pierre Legagneux, H. Grant Gilchrist, Joël Bêty, Oliver P. Love, Mark R. Forbes, Gary R. Bortolotti & Catherine Soos
For birds, unpredictable environments during the energetically stressful times of moulting and breeding are expected to have negative fitness effects. Detecting those effects however, might be difficult if individuals modulate their physiology and/or behaviours in ways to minimize short-term fitness costs. Corticosterone in feathers (CORTf) is thought to provide information on total baseline and stress-induced CORT levels at moulting and is an integrated measure of hypothalamic–pituitary–adrenal activity during the time feathers are grown. We predicted...

Data from: Do baseline glucocorticoids simultaneously represent fitness and environmental quality in a declining aerial insectivore?

Christine L. Madliger & Oliver P. Love
Glucocorticoids (GCs) are often interpreted as indicators of disturbance, habitat quality, and fitness in wild populations. However, since most investigations have been unable to examine habitat variability, GC levels, and fitness simultaneously, such interpretations remain largely unvalidated. We combined a quantification of two habitat types, a manipulation of foraging ability (feather-clipping just prior to nestling rearing), multiple baseline plasma GC measures, and multi-year reproductive monitoring to experimentally examine the linkages between habitat quality, GCs, and...

Data from: Environmental structure and energetic consequences in groups of young mice

Delia S. Shelton, Paul M. Meyer & Karen M. Ocasio
Microenvironments can have considerable physiological consequences for the inhabitants by influencing the movements of individual members. The microenvironment can permit more diverse aggregation patterns or restrict movements to certain dimensions. Here, we tested whether aspects of the microenvironment that influenced aggregation patterns also influenced the energetics of groups of young animals. We tested the effects of enclosure configuration on the group temperature and respiration of infant mice (Mus musculus). We monitored the huddle temperature and...

Data from: Male and female Rufous-and-white Wrens do not match song types with same-sex rivals during simulated territorial intrusions

Christopher Moser-Purdy, Zachary A. Kahn, Brendan A. Graham & Daniel J. Mennill
In birds with song repertoires, song-type matching occurs when an individual responds to another individual’s song by producing the same song type. Song-type matching has been described in multiple bird species and a growing body of evidence suggests that song-type matching may serve as a conventional signal of aggression, particularly in male birds in the temperate zone. Few studies have investigated song-type matching in tropical birds or female birds, in spite of the fact that...

Passive acoustic records of Lake Sturgeon calling activity in Detroit River

Dennis Higgs & Riley Beach
Lake sturgeon (Acipenser fulvescens) are endangered in the Laurentian Great Lakes with increasing binational efforts to establish spawning grounds to aid restoration. While SCUBA surveys can document spawning activity, these are labour-intensive and may disrupt spawning. We used passive acoustic monitoring to quantify spawning sounds of lake sturgeon as a first step to developing remote sensing of sturgeon spawning grounds. Acipenser sp. are known to make a variety of sounds including, “thunders” (aka drums), which...

Population genomic response to geographic gradients by widespread and endemic fishes of the Arabian Peninsula

Joseph DiBattista, Pablo Saenz-Agudelo, Marek Piatek, Fernando Cagua, Brian Bowen, John Choat, Luiz Rocha, Michelle Gaither, Jean-Paul Hobbs, Tane Sinclair-Taylor, Jennifer McIlwain, Mark Priest, Camrin Braun, Nigel Hussey, Steven Kessel & Michael Berumen
Genetic structure within marine species may be driven by local adaptation to their environment, or alternatively by historical processes, such as geographic isolation. The gulfs and seas bordering the Arabian Peninsula offer an ideal setting to examine connectivity patterns in coral reef fishes with respect to environmental gradients and vicariance. The Red Sea is characterized by a unique marine fauna, historical periods of desiccation and isolation, as well as environmental gradients in salinity, temperature, and...

A deep dive into fat: Investigating blubber lipidomics fingerprint of killer whales and humpback whales in northern Norway

Pierre Bories, Audun Rikardsen, Pim Leonards, Aaron Fisk, Sabrina Tartu, Emma Vogel, Jenny Bytingsvik & Pierre Blevin
In cetaceans, blubber is the primary and largest lipid body reservoir. Our current understanding about lipid stores and uses in cetaceans is still limited and most studies only focused on a single narrow snapshot of the lipidome. We documented an extended lipidomics fingerprint in two cetacean species present in northern Norway during wintertime. We were able to detect 817 molecular lipid species in blubber of killer whales (Orcinus orca) and humpback whales (Megaptera novaeangliae). The...

Data from: Metabolic traits of westslope cutthroat, introduced rainbow trout and their hybrids in an ecotonal hybrid zone along an elevation gradient

Joseph B. Rasmussen, Michael D. Robinson, Alice Hontela & Daniel D. Heath
In the Upper Oldman River, Alberta, introduced non-native hatchery rainbow trout hybridize with native westslope cutthroat trout, resulting in a hybrid swarm. Rainbow trout dominate at low elevations (<1250 m) in the river mainstem, cutthroat in high elevation tributaries (>1400 m), and hybrids are numerically dominant in the mid-elevation range. We hypothesized that metabolism of rainbow trout would exceed that of cutthroat trout, and that the elevation gradient in genetic makeup would be mirrored by...

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Affiliations

  • University of Windsor
    93
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