16 Works

Data from: Adaptive phenotypic response to climate enabled by epigenetics in a K-strategy species, the fish Leucoraja ocellata (Rajidae)

Jackie Lighten, Danny Incarnato, Ben J. Ward, Cock Van Oosterhout, Ian Bradbury, Mark Hanson & Paul Bentzen
The relative importance of genetic versus epigenetic changes in adaptive evolution is a hotly debated topic, with studies showing that some species appear to be able to adapt rapidly without significant genetic change. Epigenetic mechanisms may be particularly important for the evolutionary potential of species with long maturation times and low reproductive potential (‘K-strategists’), particularly when faced with rapidly changing environmental conditions. Here we study the transcriptome of two populations of the winter skate (Leucoraja...

Data from: A new integrative framework for large-scale assessments of biodiversity and community dynamics, using littoral gastropods and crabs of British Columbia, Canada

Magalie Castelin, Niels Van Steenkiste, Eric Pante, Rick Harbo, Geoff Lowe, Scott R. Gilmore, Thomas W. Therriault & Cathryn L. Abbott
Improving our understanding of species responses to environmental changes is an important contribution ecologists can make to facilitate effective management decisions. Novel synthetic approaches to assessing biodiversity and ecosystem integrity are needed, ideally including all species living in a community and the dynamics defining their ecological relationships. Here we present and apply an integrative approach that links high-throughput, multi-character taxonomy with community ecology. The overall purpose is to enable the coupling of biodiversity assessments with...

Data from: Genetic profiling links changing sea-ice to shifting beluga whale migration patterns

Gregory O'Corry-Crowe, Andrew R. Mahoney, Robert Suydam, Lori Quakenbush, Alex Whiting, Lloyd Lowry, Lois Harwood & Greg O'Corry-Crowe
There is increasing concern over how Arctic fauna will adapt to climate related changes in sea-ice. We used long-term sighting and genetic data on beluga whales (Delphinapterus leucas) in conjunction with multi-decadal patterns of sea-ice in the Pacific Arctic to investigate the influence of sea-ice on spring migration and summer residency patterns. Substantial variations in sea-ice conditions were detected across seasons, years and sub-regions, revealing ice–ocean dynamics more complex than Arctic-wide trends suggest. This variation...

Data from: Assessing conservation risks to populations of an anadromous Arctic salmonid, the northern Dolly Varden (Salvelinus malma malma), via estimates of effective and census population sizes and approximate Bayesian computation

Les N. Harris, Friso P. Palstra, Rob Bajno, Colin P. Gallagher, Kimberly L. Howland, Eric B. Taylor, James D. Reist & Robert Bajno
Census population size (Nc) is crucial to the development of resource management strategies, however, monitoring the effective population size (Ne) of managed populations has proliferated because of this parameter’s relationship to the short-term impacts of genetic stochasticity and long-term population viability. Thus, having a sound understanding of both Nc and Ne, including population connectivity, provides valuable insights into both the demographic and genetic risks to extinction. Here, we assessed microsatellite DNA variation in four (of...

Data from: A genome scan for selection signatures comparing farmed Atlantic salmon with two wild populations: testing co-localization among outlier markers, candidate genes, and QTLs for production traits

Lei Liu, Keng Pee Ang, J. A. K. Elliott, Matthew Peter Kent, Sigbjørn Lien, Danielle MacDonald & Elizabeth Grace Boulding
Comparative genome scans can be used to identify chromosome regions, but not traits, that are putatively under selection. Identification of targeted traits may be more likely in recently domesticated populations under strong artificial selection for increased production. We used a North American Atlantic salmon 6K SNP dataset to locate genome regions of an aquaculture strain (Saint John River) that were highly diverged from that of its putative wild founder population (Tobique River). First, admixed individuals...

Data from: Hitting the moving target: modelling ontogenetic shifts with stable isotopes reveals the importance of isotopic turnover

Eric Hertz, Marc Trudel, Rana El-Sabaawi, Strahan Tucker, John F. Dower, Terry D. Beacham, Andrew M. Edwards & Asit Mazumder
Ontogenetic niche shifts are widely prevalent in nature and are important in shaping the structure and dynamics of ecosystems. Stable isotope analysis is a powerful tool to assess these shifts, with δ15N providing a measure of trophic level and δ13C a measure of energy source. Previous applications of stable isotopes to study ontogenetic niche shifts have not considered the appreciable time-lag between diet and consumer tissue associated with isotopic turnover. These time-lags introduce significant complexity...

Data from: The structure and distribution of benthic communities on a shallow seamount (Cobb Seamount, Northeast Pacific Ocean)

Cherisse Du Preez, Janelle M. R. Curtis & M. Elizabeth Clarke
Partially owing to their isolation and remote distribution, research on seamounts is still in its infancy, with few comprehensive datasets and empirical evidence supporting or refuting prevailing ecological paradigms. As anthropogenic activity in the high seas increases, so does the need for better understanding of seamount ecosystems and factors that influence the distribution of sensitive benthic communities. This study used quantitative community analyses to detail the structure, diversity, and distribution of benthic mega-epifauna communities on...

Data from: Modified low-salt CTAB extraction of high-quality DNA from contaminant rich tissues

Jean-Rene Arseneau, Royce Steeves & Mark Laflamme
The increasing use of high-throughput sequencing platforms has made the isolation of pure, high molecular weight DNA a primary concern for studies of a diverse range of organisms. Purification of DNA remains a significant challenge in many tissue and sample types due to various organic and inorganic molecules that co-precipitate with nucleic acids. Molluscs, for example, contain high concentrations of polysaccharides which often co-precipitate with DNA and can inhibit downstream enzymatic reactions. We modified a...

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: Ecophysiological limits to aerobic metabolism in hypoxia determine epibenthic distributions and energy sequestration in the northeast Pacific ocean

Jackson W. F. Chu & Katie S. P. Gale
Expansion of oxygen deficient waters (hypoxia) in the northeast Pacific Ocean (NEP) will have marked impacts on marine life. The response of the resident communities will be a function of their ecophysiological constraints in low oxygen, although this remains untested in the NEP due to a lack of integrative studies. Here, we combine in situ surveys and lab-based respirometry experiments were conducted on three indicator species (spot prawn Pandalus platyceros, slender sole Lyopsetta exilis, squat...

Data from: Identifying patterns of dispersal, connectivity, and selection in the sea scallop, Placopecten magellanicus, using RAD-seq derived SNPs

Mallory Van Wyngaarden, Paul V.R. Snelgrove, Claudio DiBacco, Lorraine C. Hamilton, Naiara Rodríguez-Ezpeleta, Nicholas W. Jeffery, Ryan R. Stanley, Ian R. Bradbury, Ryan R. E. Stanley & Paul V. R. Snelgrove
Understanding patterns of dispersal and connectivity among marine populations can directly inform fisheries conservation and management. Advances in high-throughput sequencing offer new opportunities for estimating marine connectivity. We used Restriction-site Associated DNA sequencing to examine dispersal and realized connectivity in the sea scallop Placopecten magellanicus, an economically important marine bivalve. Based on 245 individuals sampled range-wide at 12 locations from Newfoundland to the Mid-Atlantic Bight we identified and genotyped 7163 Single Nucleotide Polymorphisms; 112 (1.6%)...

Data from: Post-spawning sexual selection in red and white Chinook salmon (Oncorhynchus tshawytscha)

Sarah J. Lehnert, Daniel D. Heath, Robert H. Devlin & Trevor E. Pitcher
Post-copulatory processes, including sperm competition and cryptic female choice (CFC), can play important roles in the maintenance of polymorphisms. In Chinook salmon (Oncorhynchus tshawytscha), color morphs (red and white) exist due to genetic polymorphisms affecting carotenoid deposition in flesh, skin, and gametes. We investigated the role of post-spawning sexual selection in maintaining the polymorphism in a mixed population. First, we compared sperm velocity differences in water between morphs. Next, we measured color-based CFC via 2...

Data from: Dietary habits of polar bears in Foxe Basin, Canada: possible evidence of a trophic regime shift mediated by a new top predator

Melissa P. Galicia, Gregory W. Thiemann, Markus G. Dyck, Steven H. Ferguson & Jeff W. Higdon
Polar bear (Ursus maritimus) subpopulations in several areas with seasonal sea ice regimes have shown declines in body condition, reproductive rates, or abundance as a result of declining sea ice habitat. In the Foxe Basin region of Nunavut, Canada, the size of the polar bear subpopulation has remained largely stable over the past 20 years, despite concurrent declines in sea ice habitat. We used fatty acid analysis to examine polar bear feeding habits in Foxe...

Data from: Latitudinal variation in ecological opportunity and intraspecific competition indicates differences in niche variability and diet specialization of Arctic marine predators

David J. Yurkowski, Steve Ferguson, Emily S. Choy, Lisa L. Loseto, Tanya M. Brown, Derek C. G. Muir, Christina A. D. Semeniuk & Aaron T. Fisk
Individual specialization (IS), where individuals within populations irrespective of age, sex, and body size are either specialized or generalized in terms of resource use, has implications on ecological niches and food web structure. Niche size and degree of IS of near-top trophic-level marine predators have been little studied in polar regions or with latitude. We quantified the large-scale latitudinal variation of population- and individual-level niche size and IS in ringed seals (Pusa hispida) and beluga...

Data from: Genetic stock structure of Anadromous Arctic char in Canada’s Central Arctic: potential implications for the management of Canada’s largest Arctic char commercial fishery

Les N. Harris, Jean-Sébastien Moore, Robert Bajno & Ross F. Tallman
The Arctic Char Salvelinus alpinus is widely considered the most important subsistence fish species in the Canadian Arctic. Throughout the species’ range, commercial fisheries for Arctic Char also exist, the management of which primarily follows river-specific harvest strategies. Such an approach, however, may not be appropriate if the management unit or stock does not accurately reflect a demographically independent population or if mixtures of populations are being harvested. We assayed microsatellite DNA variation among 744...

Data from: Loss of reproductive output caused by an invasive species

Maude E. M. Tremblay, Todd J. Morris & Josef D. Ackerman
We investigated whether Neogobius melanostomus, an invader of biodiversity ‘hot-spots’ in the Laurentian Great Lakes region, facilitates or inhibits unionid mussel recruitment by serving as a host or sink for their parasitic larvae (glochidia). Infestation and metamorphosis rates of four mussel species with at-risk (conservation) status (Epioblasma torulosa rangiana, Epioblasma triquetra, Lampsilis fasciola and Villosa iris) and one common species (Actinonaias ligamentina) on N. melanostomus were compared with rates on known primary and marginal hosts...

Registration Year

  • 2016

Resource Types

  • Dataset


  • Fisheries and Oceans Canada
  • University of Windsor
  • Memorial University of Newfoundland
  • Dalhousie University
  • University of Guelph
  • University of Victoria
  • Royal British Columbia Museum
  • Earlham Institute
  • University of Alaska Fairbanks
  • University of East Anglia