A5029567373- Marine and fisheries research
- Fish Ecology and Management Studies
- Marine animal studies overview
- Coral and Marine Ecosystems Studies
- Marine Bivalve and Aquaculture Studies
- Genetic diversity and population structure
- Identification and Quantification in Food
- Genetic and phenotypic traits in livestock
- Animal Vocal Communication and Behavior
- Underwater Acoustics Research
- Marine Biology and Ecology Research
- Fish Biology and Ecology Studies
- Ichthyology and Marine Biology
- Crustacean biology and ecology
- Water Quality Monitoring Technologies
- Isotope Analysis in Ecology
- Ocean Acidification Effects and Responses
- Physiological and biochemical adaptations
- Aquaculture Nutrition and Growth
- Underwater Vehicles and Communication Systems
- Offshore Engineering and Technologies
- Fish biology, ecology, and behavior
- Environmental DNA in Biodiversity Studies
- Rangeland and Wildlife Management
- Parasites and Host Interactions
Fisheries and Oceans Canada
2016-2025
University of Victoria
2020
Shell (Netherlands)
2012-2019
Memorial University of Newfoundland
2002-2019
Dalhousie University
2019
Griffith University
2015
St. John's University
2012
Aix-Marseille Université
2005
Despite the enormous economic and ecological importance of marine organisms, spatial scales adaptation biocomplexity remain largely unknown. Yet, preservation local stocks that possess adaptive diversity is critical to long-term maintenance productive stable fisheries ecosystems. Here, we document genomic evidence range-wide differentiation in a broadcast spawning fish, Atlantic cod ( Gadus morhua ), using genome survey single nucleotide polymorphisms. Of 1641 gene-associated polymorphisms...
As populations diverge, genomic regions associated with adaptation display elevated differentiation. These islands of adaptive divergence can inform conservation efforts in exploited species, by refining the delineation management units, and providing tools for more precise effective population monitoring successful assignment individuals products. We explored heterogeneity its impact on resolution spatial structure Atlantic cod, Gadus morhua, using genome wide expressed sequence derived...
The mode and extent of rapid evolution genomic change in response to human harvesting are key conservation issues. Although experiments models have shown a high potential for both genetic phenotypic fishing, empirical examples responses wild populations rare. Here, we compare whole-genome sequence data Atlantic cod (Gadus morhua) that were collected before (early 20th century) after 21st periods intensive exploitation decline the age maturation from two geographically distinct Newfoundland,...
This study investigated the behaviour and commercial catchability of snow crab (Chionoecetes opilio) in response to different low-powered LED lights under laboratory field conditions. We created a novel choice-experiment setting which we coloured lights. The results showed that movement was dependent on light colour, with animals choosing move toward blue white lights, away from purple no detectable effect for green red then conducted two experiments investigate same catch rates traps during...
Abstract Intraspecific diversity is central to the management and conservation of exploited species, yet knowledge how this distributed maintained in genome many marine species lacking. Recent advances genomic analyses allow for genome‐wide surveys intraspecific offer new opportunities exploring patterns divergence. Here, we analysed polymorphisms measure genetic differentiation between an offshore migratory a nonmigratory population define units Atlantic Cod ( Gadus morhua ) coastal...
Chromosome structural variation may underpin ecologically important intraspecific diversity by reducing recombination within supergenes containing linked, coadapted alleles. Here, we confirm that an ancient chromosomal rearrangement is strongly associated with migratory phenotype and individual genetic structure in Atlantic cod (Gadus morhua) across the Northwest Atlantic. We reconstruct trends effective population size over last century reveal declines matching onset of industrialized...
Abstract Genomic architecture and standing variation can play a key role in ecological adaptation contribute to the predictability of evolution. In Atlantic cod ( Gadus morhua ), four large chromosomal rearrangements have been associated with gradients migratory behavior regional analyses. However, degree parallelism, extent independent inheritance, functional distinctiveness these remain poorly understood. Here, we use 12K single nucleotide polymorphism (SNP) array demonstrate extensive...
Abstract The increasing use of single nucleotide polymorphisms (SNPs) in studies nonmodel organisms accentuates the need to evaluate influence ascertainment bias on accurate ecological or evolutionary inference. Using a panel 1641 expressed sequence tag–derived SNPs developed for northwest Atlantic cod ( Gadus morhua) , we examined and its potential impact assignment individuals populations ranging widely origin. We hypothesized that reductions success would be associated with lower...
Abstract Ongoing effects of climate change create a dual challenge shifting distributions organisms and concerns about the fate organic carbon in nature. Marine sediments store vast amounts carbon, but that material hinges on biology associated with seafloor how they influence rates decomposition burial. Shifts large megafauna disturb thus help to oxygenate could have important ramifications regarding whether release or for long periods time. We consider snow crab lobster, two commercially...
The Gilbert Bay Marine Protected Area (MPA), Labrador, was created in 2005 to conserve a coastal resident population of Atlantic cod ( Gadus morhua ). Scientific research and monitoring have been conducted consistently since 1998, data used assess the health provide management advice. This study has two parts: first part applies standard quantitative fisheries stock assessment methodology (length-based assessment) growth mortality parameters; second considers all available MPA indicator...
This study investigated changes in the abundance and behaviour of groundfish species at a relatively deep-water site along eastern continental slope Canada, when exposed to commercial seismic survey that lasted 100 consecutive days. Baited cameras were deployed control impact sites, before after exposure, consisting 323, 5-h long, videos. Changes not explained by surveying noise for any five commonly observed fish species. However, Atlantic cod found have significantly longer arrival-times...
The auditory frequency weighted daily sound exposure level (SEL) is used in many jurisdictions to assess possible injury the hearing of marine life. Therefore, using SEL describe soundscapes would provide baseline information about environment same tools measure injury. Here, from 12 recordings with durations 18–97 days are analyzed to: (1) identify natural versus environments affected by human activity, (2) demonstrate how accumulates different types sources, (3) show effects recorder duty...
Masking is often assessed by quantifying changes, due to increasing noise, an animal's communication or listening range. While the methods used measure ranges are functionally similar if for vocalizations, they differ in their approaches: range focused on sender's call, while centered listener's ability perceive any signal. How these two use and output important management recommendations. Therefore it was investigated how may alter conclusions of masking assessments based Atlantic cod calls...
The growth, length at age, time of spawning, food, and movements the genetically distinct, resident northern Atlantic cod (Gadus morhua L.) in Gilbert Bay, Labrador, were studied over four consecutive years (1998–2001). Angling plankton nets used to sample all stages life history. During study, 2453 tagged with Floy t-bar tags, but none recaptured outside bay. Length-at-age is smaller than those other off Newfoundland Labrador. Males mature 31.0–35.5 cm total (TL) 4–6 females 31.4–42.1 cm,...
Sound is used by a variety of marine taxa for feeding, reproduction, navigation and predator avoidance therefore alterations to the soundscape from industrial noise have potential negatively affect an animal's fitness. Furthermore, responses would also influence commercial fishing interests. Unfortunately invertebrates are generally underrepresented in seismic effects literature. Snow crab harvesters Atlantic Canada contend that widespread hydrocarbon exploration has strong negative on catch...
The use of high-power lights during night-time purse seining is common in Vietnam. Typically, metal halide (MH) lamps are used the commercial fishery to attract fish, however these require more energy, have a shorter lifespan, and lower chromatic performance than light emitting diode (LED) lamps. This study examined catch efficiency fuel consumption when using LED combination with reduced numbers MH (10.24 kW), compared conventional lighting (28.6 off coast Ninh Thuan province, economic...
Anadromous Arctic char (Salvelinus alpinus) migrate back to fresh water in late summer spawn and (or) overwinter. Upon freshwater entry, feeding is reduced or absent, movement activity restricted. While the physiological responses low temperatures (e.g., growth, metabolism) are understood, specifics of use thermal habitat for overwintering remains poorly characterized. This study used acoustic archival telemetry data from two lakes southern Labrador, Canada, during ice-covered period....
Sound is an environmental feature that used by a variety of marine taxa for feeding, reproduction, navigation and predator avoidance. Consequently, alterations to the soundscape have potential alter individual's behaviour, physiology ultimately fitness. Furthermore, such responses negatively influence commercial fishing interests. In Atlantic Canada, snow crab hydrocarbon extraction are billion dollar industries. Snow harvesters contend seismic noise from exploration has strong negative...
Despite efforts to protect the resident Atlantic cod (Gadus morhua) population in Gilbert Bay, Labrador, its abundance has decreased since area was designated a Marine Protected Area (MPA). As part of an effort understand reasons for decline, tracking tagged with surgically implanted ultrasonic transmitters conducted determine migratory behavior relation MPA boundaries. Acoustic used network data-logging receivers deployed Bay and contiguous marine waters, permitting year-round monitoring...