97 Works

Data from: Lifespan and reproductive cost explain interspecific variation in the optimal onset of reproduction

Emeline Mourocq, Pierre Bize, Sandra Bouwhuis, Russell Bradley, Anne Charmantier, Carlos De La Cruz, Szymon Marian Obniak, Richard H. M. Espie, Márton Herenyi, Hermann Hötker, Oliver Kruger, John Marzluff, Anders P. Møller, Shinichi Nakagawa, Richard A. Phillips, Andrew N. Radford, Alexandre Roulin, János Török, Juliana Valencia, Martijn Van De Pol, Ian G. Warkentin, Isabel S. Winney, Andrew G. Wood, Michael Griesser & Szymon M. Drobniak
Fitness can be profoundly influenced by the age at first reproduction (AFR), but to date the AFR-fitness relationship only has been investigated intraspecifically. Here we investigated the relationship between AFR and average lifetime reproductive success (LRS) across 34 bird species. We assessed differences in the deviation of the Optimal AFR (i.e., the species-specific AFR associated with the highest LRS) from the age at sexual maturity, considering potential effects of life-history as well as social and...

Data from: Physical and biological factors affect the vertical distribution of larvae of benthic gastropods in a shallow embayment

Michelle J. Lloyd, Anna Metaxas, Brad DeYoung & MJ Lloyd
Marine gastropods form a diverse taxonomic group, yet little is known about the factors that affect their larval distribution and abundance. We investigated the larval vertical distribution and abundance of 9 meroplanktonic gastropod taxa (Margarites spp., Crepidula spp., Astyris lunata, Diaphana minuta, Littorinimorpha, Arrhoges occidentalis, Ilyanassa spp., Bittiolum alternatum and Nudibranchia), with similar morphology and swimming abilities, but different adult habitats and life-history strategies. We explored the role of physical (temperature, salinity, density, current velocities)...

Data from: The diet of Myotis lucifugus across Canada: assessing foraging quality and diet variability

Elizabeth L. Clare, William O. C. Symondson, Hugh Broders, François Fabianek, Erin E. Frazer, Alistair MacKenzie, Andrew Boughen, Rachel Hamilton, Craig K. R. Willis, Felix Martinez-Nuñez, Allyson K. Menzies, Kaleigh J. O. Norquay, Mark Brigham, Joseph Poissant, Jody Rintoul, Robert M. R. Barclay, Jesika P. Reimer & Erin E. Fraser
Variation in prey resources influences the diet and behaviour of predators. When prey become limiting, predators may travel farther to find preferred food or adjust to existing local resources. When predators are habitat limited, local resource abundance impacts foraging success. We analysed the diet of Myotis lucifugus (little brown bats) from Nova Scotia (eastern Canada) to the Northwest Territories (north-western Canada). This distribution includes extremes of season length and temperature and encompasses colonies on rural...

Data from: Bay-scale patterns in the distribution, aggregation and spatial variability of larvae of benthic invertebrates

Remi M. Daigle, Anna Metaxas, Brad DeYoung & RM Daigle
This study aimed to investigate mechanisms of pattern formation in the larval distributions of benthic invertebrates by relating the spatial and temporal variability in the larval distributions to that in physical and biological variables, such as temperature, salinity, fluorescence and current velocity. Larvae were sampled at 11 sites on 7-8, and 11-12 Aug 2008 and at 16 sites on Aug 2-4, 2009, with a 200-μm plankton ring net (0.75-m diameter) towed for 5 min at...

Data from: Metabolic scaling of individuals vs. populations: evidence for variation in scaling exponents at different hierarchical levels

Tommy Norin & A. Kurt Gamperl
1. The power scaling of metabolic rate with body mass is fundamental to animal biology, due to the profound influence that animal size has on ecology and physiolatically with cell size or metabolic intensity between the boundaries of 0.67 and 1. Despite this tremendous interest in the value of scaling exponents, little is known about metabolic scaling within individual animals and how this relates to population-level scaling. 2. Here, we conducted a long-term study that...

Scientific shortcomings in environmental impact statements internationally

Gerald Singh, Jackie Lerner, Megan Mach, Cathryn Clarke Murray, Bernardo Ranieri, Guillaume Peterson St-Laurent, Janson Wong, Alice Guimaraes, Gustavo Yunda-Guarin, Terre Satterfield & Kai Chan
1. Governments around the world rely on environmental impact assessment to understand the environmental risks of proposed developments. 2. To examine the basis for these appraisals, we examine the output of environmental impact assessment processes in jurisdictions within seven countries, focusing on scope (spatial and temporal), mitigation actions, and whether impacts were identified as ‘significant’. 3. We find that the number of impacts characterized as significant is generally low. While this finding may indicate that...

Territory acquisition mediates the influence of predators and climate on juvenile red squirrel survival

Jack G Hendrix, David Fisher, April Martinig, Stan Boutin, Ben Dantzer, Jeffrey Lane & Andrew McAdam
1) Juvenile survival to first breeding is a key life history stage for all taxa. Survival through this period can be particularly challenging when it can coincide with harsh environmental conditions such as a winter climate or food scarcity, leading to highly variable cohort survival. However, the small size and dispersive nature of juveniles generally makes studying their survival more difficult. 2) In territorial species, a key life history event is the acquisition of a...

Biological traits of seabirds predict extinction risk and vulnerability to anthropogenic threats

Cerren Richards, Robert Cooke & Amanda Bates
Aim Seabirds are heavily threatened by anthropogenic activities and their conservation status is deteriorating rapidly. Yet, these pressures are unlikely to uniformly impact all species. It remains an open question if seabirds with similar ecological roles are responding similarly to human pressures. Here we aim to: 1) test whether threatened vs non-threatened seabirds are separated in trait space; 2) quantify the similarity of species’ roles (redundancy) per IUCN Red List Category; and 3) identify traits...

Data from: Anatomy of the Ediacaran rangeomorph Charnia masoni

Frances S. Dunn, Philip R. Wilby, Charlotte G. Kenchington, Dmitry V. Grazhdankin, Philip C. J. Donoghue, Alexander G. Liu & Dmitriy V. Grazhdankin
The Ediacaran macrofossil Charnia masoni Ford is perhaps the most iconic member of the Rangeomorpha: a group of seemingly sessile, frondose organisms that dominates late Ediacaran benthic, deep‐marine fossil assemblages. Despite C. masoni exhibiting broad palaeogeographical and stratigraphical ranges, there have been few morphological studies that consider the variation observed among populations of specimens derived from multiple global localities. We present an analysis of C. masoni that evaluates specimens from the UK, Canada and Russia,...

Data from: Dynamically prognosticating patients with hepatocellular carcinoma through survival paths mapping based on time-series data

Lujun Shen, Qi Zeng, Pi Guo, Jingjun Huang, Chaofeng Li, Tao Pan, Boyang Chang, Nan Wu, Lewei Yang, Qifeng Chen, Tao Huang, Wang Li & Peihong Wu
Patients with hepatocellular carcinoma (HCC) always require routine surveillance and repeated treatment, which leads to accumulation of huge amount of clinical data. A predictive model utilizes the time-series data to facilitate dynamic prognosis prediction and treatment planning is warranted. Here we introduced an analytical approach, which converts the time-series data into a cascading survival map, in which each survival path bifurcates at fixed time interval depending on selected prognostic features by the Cox-based feature selection....

The BenBioDen database, a global database for meio-, macro- and megabenthic biomass and densities

Tanja Stratmann, Dick Van Oevelen, Pedro Martínez Arbizu, Chih-Lin Wei, Jian-Xiang Liao, Mathieu Cusson, Ricardo A. Scrosati, Philippe Archambault, Paul V. R. Snelgrove, Patricia A. Ramey-Balci, Brenda J. Burd, Ellen Kenchington, Kent Gilkinson, Rénald Belley & Karline Soetaert
Benthic fauna refers to all fauna that live in or on the seafloor, which researchers typically divide into size classes meiobenthos (32/ 64 µm – 0.5/ 1 mm), macrobenthos (250 µm – 1 cm), and megabenthos (> 1 cm). Benthic fauna play important roles in bioturbation activity, mineralization of organic matter, and in marine food webs. Evaluating their role in these ecosystem functions requires knowledge of their global distribution and biomass. We therefore established the...

Data from: Space use and social association in a gregarious ungulate: testing the conspecific attraction and resource dispersion hypotheses

Mélissa Peignier, Quinn M. R. Webber, Erin L. Koen, Michel P. Laforge, Alec L. Robitaille & Eric Vander Wal
Animals use a variety of proximate cues to assess habitat quality when resources vary spatiotemporally. Two nonmutually exclusive strategies to assess habitat quality involve either direct assessment of landscape features or observation of social cues from conspecifics as a form of information transfer about forage resources. The conspecific attraction hypothesis proposes that individual space use is dependent on the distribution of conspecifics rather than the location of resource patches, whereas the resource dispersion hypothesis proposes...

Data from: Chromosome polymorphisms track trans‐Atlantic divergence and secondary contact in Atlantic salmon

Sarah J. Lehnert, Paul Bentzen, Tony Kess, Sigbjorn Lien, John B. Horne, Marie Clément & Ian R. Bradbury
Pleistocene glaciations drove repeated range contractions and expansions shaping contemporary intraspecific diversity. Atlantic salmon (Salmo salar) in the western and eastern Atlantic diverged >600,000 YBP, with the two lineages isolated in different southern refugia during glacial maxima, driving trans-Atlantic genomic and karyotypic divergence. Here, we investigate genomic consequences of glacial isolation and trans-Atlantic secondary contact using 108,870 single nucleotide polymorphisms (SNPs) genotyped in 80 North American and European populations. Throughout North America, we identified extensive...

Data from: Active buoyancy adjustment increases dispersal potential in benthic marine animals

Jean-Francois Hamel, Jiamin Sun, Bruno L. Gianasi, Emaline M. Montgomery, Ellen L. Kenchington, Benoit Burel, Sherrylynn Rowe, Paul D. Winger & Annie Mercier
1. While the study of dispersal and connectivity in the ocean typically centers on pelagic species and planktonic larval stages of benthic species, the present work explores an overlooked locomotor means in post-settlement benthic stages that redefines their dispersal potential. 2. Members of the echinoderm class Holothuroidea colonize a diversity of marine environments worldwide, where they play key ecological and economical roles, making their conservation a priority. Holothuroids are commonly called sea cucumbers or sea...

A Gypsy element contributes to the nuclear retention and transcriptional regulation of the resident lncRNA in locusts

Xia Zhang, Ya′Nan Zhu, Bing Chen & Le Kang
The majority of long noncoding RNAs (lncRNAs) contain transposable elements (TEs). PAHAL, a nuclear-retained lncRNA that is inserted by a Gypsy retrotransposon, has been shown to be a vital regulator of phenylalanine hydroxylase (PAH) gene expression that controls dopamine biosynthesis and behavioural aggregation in the migratory locust. However, the role of the Gypsy retrotransposon in the transcriptional regulation of PAHAL remains unknown. Here, we identified a Gypsy retrotransposon (named Gypsy element) as an inverted long...

Data from: Reference genome of Lumpfish Cyclopterus lumpus Linnaeus provides evidence of male heterogametic sex determination through the AMH pathway

Melissa Holborn, Anthony Einfeldt, Tony Kess, Steve Duffy, Amber Messmer, Barbara Langille, Johanne Gauthier, Paul Bentzen, Tim Knutsen, Matthew Kent, Danny Boyce & Ian Bradbury
Teleosts exhibit extensive diversity of sex determination (SD) systems and mechanisms, providing the opportunity to study the evolution of sex determination and sex chromosomes. Here we sequenced the genome of the Common Lumpfish (Cyclopterus lumpus Linnaeus), a species of increasing importance to aquaculture, and identified the SD region and master SD locus using a 70K SNP array and tissue-specific expression data. The chromosome-level assembly identified 25 diploid chromosomes with a total size of 572.89 Mb,...

Influence of number of individuals and observations per individual on a model of community structure

Julia Sunga, Quinn M. R. Webber & Hugh G. Broders
Social network analysis is increasingly applied to understand animal groups. However, it is rarely feasible to observe every interaction among all individuals in natural populations. Studies have assessed how missing information affects estimates of individual network positions, but less attention has been paid to metrics that characterize overall network structure such as modularity, clustering coefficient, and density. In cases such as groups displaying fission-fusion dynamics, where subgroups break apart and rejoin in changing conformations, missing...

Ecological data for: Subsidy accessibility drives asymmetric food web responses

Marie Gutgesell, Marie Gutgesell, Bailey McMeans, Matthew Guzzo, Valesca De Groot, Aaron Fisk, Timothy Johnson & Kevin McCann
Global change is fundamentally altering flows of natural and anthropogenic subsidies across space and time. After a pointed call for research on subsidies in the 1990s, an industry of empirical work has documented the ubiquitous role subsidies play in ecosystem structure, stability and function. Here, we argue that physical constraints (e.g., water temperature) and species traits can govern a species’ accessibility to resource subsidies, which has been largely overlooked in the subsidy literature. We examined...

sj-xlsx-2-bmi-10.1177_11772719221141525 – Supplemental material for Advantages and Limitations of Monitoring Circulating Tumor DNA Levels to Predict the Prognosis of Patients Diagnosed With Gastric Cancer

Wan He, Jingxin Yang, Xiao Sun, Shunda Jiang, Jinchan Jiang, Ming Liu, Tianhao Mu, Yingmei Li, Xiaoni Zhang, Jingxian Duan & Ruilian Xu
Supplemental material, sj-xlsx-2-bmi-10.1177_11772719221141525 for Advantages and Limitations of Monitoring Circulating Tumor DNA Levels to Predict the Prognosis of Patients Diagnosed With Gastric Cancer by Wan He, Jingxin Yang, Xiao Sun, Shunda Jiang, Jinchan Jiang, Ming Liu, Tianhao Mu, Yingmei Li, Xiaoni Zhang, Jingxian Duan and Ruilian Xu in Biomarker Insights

sj-xlsx-3-bmi-10.1177_11772719221141525 – Supplemental material for Advantages and Limitations of Monitoring Circulating Tumor DNA Levels to Predict the Prognosis of Patients Diagnosed With Gastric Cancer

Wan He, Jingxin Yang, Xiao Sun, Shunda Jiang, Jinchan Jiang, Ming Liu, Tianhao Mu, Yingmei Li, Xiaoni Zhang, Jingxian Duan & Ruilian Xu
Supplemental material, sj-xlsx-3-bmi-10.1177_11772719221141525 for Advantages and Limitations of Monitoring Circulating Tumor DNA Levels to Predict the Prognosis of Patients Diagnosed With Gastric Cancer by Wan He, Jingxin Yang, Xiao Sun, Shunda Jiang, Jinchan Jiang, Ming Liu, Tianhao Mu, Yingmei Li, Xiaoni Zhang, Jingxian Duan and Ruilian Xu in Biomarker Insights

Data from: Hybridization between genetically modified Atlantic salmon and wild brown trout reveals novel ecological interactions

Krista B. Oke, Peter A. H. Westley, Darek T. R. Moreau & Ian A. Fleming
Interspecific hybridization is a route for transgenes from genetically modified (GM) animals to invade wild populations, yet the ecological effects and potential risks that may emerge from such hybridization are unknown. Through experimental crosses, we demonstrate transmission of a growth hormone transgene via hybridization between a candidate for commercial aquaculture production, GM Atlantic salmon (Salmo salar), and closely related wild brown trout (S. trutta). Transgenic hybrids were viable and grew more rapidly than transgenic salmon...

Data from: Patterns in vertical distribution and their potential effects on transport of larval benthic invertebrates in a shallow embayment

Michelle J. Lloyd, Anna Metaxas, Brad DeYoung & MJ Lloyd
Measurements of larval vertical distributions at high temporal and spatial resolutions as well as larval behavioural responses to environmental characteristics are needed to parameterize bio-physical models of larval dispersal or transport. We studied larval vertical distribution for 7 taxonomic groups (gastropods, bivalves, polychaetes, bryozoans, asteroids, carideans and brachyurans), with different morphology, swimming abilities and life-history strategies, and examined whether these vary with physical or biological factors and periodic cycles (diel period and tidal state) in...

Data from: Season and site fidelity determine home range of dispersing and resident juvenile Greenland cod (Gadus ogac) in a Newfoundland fjord

Melanie Shapiera, Robert S. Gregory, Corey J. Morris, Curtis J. Pennell, Paul V. R. Snelgrove, RS Gregory, CJ Morris, CJ Pennell & PVR Snelgrove
We used acoustic telemetry to track age 1 juvenile Greenland cod Gadus ogac in Newman Sound, Newfoundland, from October 2010 to November 2012, in 2 consecutive 1 yr experiments. Using single (Year 1) and reciprocal (Year 2) transplant study designs, we investigated seasonal dispersal, home range area, and potential homing behaviour between coves ~3.5 km apart. We tracked individuals moving at metre to kilometre scales, using a network of 26 to 32 hydrophones. We converted...

Data from: The effects of sexual selection on life history traits: an experimental study on guppies

Christophe Pélabon, Line K. Larsen, Geir H. Bolstad, Åslaug Viken, Ian A. Fleming & Gunilla Rosenqvist
Sexual selection is often prevented during captive breeding in order to maximize effective population size and retain genetic diversity. However, enforcing monogamy and thereby preventing sexual selection may affect population fitness either negatively by preventing the purging of deleterious mutations or positively by reducing sexual conflicts. To better understand the effect of sexual selection on the fitness of small populations, we compared components of female fitness and the expression of male secondary sexual characters in...

Resolving fine-scale population structure and fishery exploitation using sequenced microsatellites in a northern fish

Kara K.S. Layton, J. Brian Dempson, Paul V.R. Snelgrove, Steven J. Duffy, Amber M. Messmer, Ian Paterson, Nicholas W. Jeffery, Tony Kess, John B. Horne, Sarah J. Salisbury, Daniel E. Ruzzante, Paul Bentzen, David Côté, Cameron M. Nugent, Moira M. Ferguson, Jong S. Leong, Ben F. Koop & Ian R. Bradbury
The resiliency of populations and species to environmental change is dependent on the maintenance of genetic diversity, and as such quantifying diversity is central to combatting ongoing wide spread reductions in biodiversity. With the advent of next-generation sequencing, several methods now exist for resolving fine-scale population structure, but the comparative performance of these methods for genetic assignment has rarely been tested. Here we evaluate the performance of sequenced microsatellites and a single nucleotide polymorphism (SNP)...

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