A5115053597- Marine and fisheries research
- Fish Ecology and Management Studies
- Geotechnical Engineering and Analysis
- Marine Bivalve and Aquaculture Studies
- Coral and Marine Ecosystems Studies
- Landslides and related hazards
- Geotechnical Engineering and Soil Stabilization
- Geotechnical Engineering and Underground Structures
- Dam Engineering and Safety
- Coastal and Marine Management
- Wildlife Ecology and Conservation
- Economic and Environmental Valuation
- Soil and Unsaturated Flow
- Aquatic Invertebrate Ecology and Behavior
- Bayesian Modeling and Causal Inference
- Aquatic Ecosystems and Biodiversity
- Fish biology, ecology, and behavior
- Spatial and Panel Data Analysis
- Cephalopods and Marine Biology
- Genetic diversity and population structure
- Coastal wetland ecosystem dynamics
- Survey Methodology and Nonresponse
- Environmental Conservation and Management
- Identification and Quantification in Food
- Geotechnical Engineering and Soil Mechanics
Fisheries and Oceans Canada
2017-2025
Delft University of Technology
2017-2023
University of British Columbia
2008-2018
Freshwater Fisheries Society of BC
2012-2016
Indian Institute of Technology Roorkee
2015
The south coast of Newfoundland, Canada (Northwest Atlantic Fisheries Organization (NAFO) Subdivision 3Ps) is known to be a mixing zone for cod ( Gadus morhua ). Tagging and genetic studies have shown from the Northern Southern Gulf St. Lawrence (NAFO Divisions 3Pn, 4RST), Grand Banks (3NO), stock complex (2J3KL) frequent waters 3Ps at various times throughout year, but extent unknown. However, has not been central focus previous large-scale genomic analyses population structure, knowledge...
The first relatively complete landscape-scale social–ecological system (SES) model of a recreational fishery was developed and ground-truthed with independent angling effort data. Based on the British Columbia multistock for rainbow trout (Oncorynchus mykiss), includes hundreds individual lake fisheries, thousands anglers, originating from tens communities, connected by complex road trail networks, all distributed over landscape approximately half million square kilometres. approach is...
This paper investigates the influence of three forms uncertainty on probabilistic stability an idealised 3D embankment slope. These are: 1D spatial variability in external geometry slope along its length, 2D depth boundary between material and foundation layer, shear strength properties materials. The relative each has been investigated using random finite element method, based statistics consistent with a Dutch regional dyke. results indicate that, for such structure, soil much greater than...
This paper analyzes the trophic role of Pacific herring, potential consequences its depletion, and impacts alternative herring fishing strategies on a Northeast food web in relation to precautionary, ecosystem-based management. We used an Ecopath with Ecosim ecosystem model parameterized for northern British Columbia (Canada), employing simulate effects stock collapse. The ecological various were investigated Management Strategy Evaluation algorithm within Ecosim, accounting variability...
A case study involving the assessment and re-design of an existing dyke, founded on a layered soil, has compared deterministic analysis based 5-percentile property values reliability-based random finite element consistent with requirements Eurocode 7. The results show that consideration spatial nature soil variability generally leads to higher computed factors safety and, for those dyke sections requiring remedial action, more economic designs. Back-figured characteristic are shown be...
Marine ecosystem models are used to investigate marine protected area (MPA) benefits for coral reef ecosystems located in Raja Ampat, the heart of Coral Triangle. Field data from an integrated and diverse research project is develop a spatial model using Ecopath, Ecosim, Ecospace modelling software. The ecological fisheries responses different levels fishing effort restrictions inside MPAs explored. trade-offs allowing some operate versus designating as no-take zones highlighted. results...
Abstract Recreational fishing effort varies across complex inland landscapes (e.g., lake‐districts) and appears influenced by both angler preferences qualities of the fishery resource, like fish size abundance. However, abundance have an ecological trade‐off within a population, thereby structuring equal‐quality isopleths expressing this landscape. Since expressed recreational anglers (i.e., site‐selection high‐quality opportunities among many lakes) can be analogous to optimal foraging...
Abstract One of the key challenges in recreational fisheries management is to provide a rational basis for decisions face conflicting objectives, such as improving angling opportunities, maintaining satisfaction across diverse fishing client base, controlling costs, and conserving wild populations. We developed multi‐criteria decision analysis approach managing trout (e.g., Rainbow Trout Oncorhynchus mykiss ). The was implemented Bayesian network. support tool, called “Stock‐Optim,” provides...
Abstract Mille Lacs Lake, Minnesota, has experienced a decline in the population of Cisco Coregonus artedi since 1980s. is coldwater stenotherm, and often attributed to general increase lake temperature. However, there also been fishery for this species during last 20 years. To investigate influence temperature on decline, three versions surplus production model (SPM) were formulated: (1) SPM with observation error only, (2) maximum anomaly, (3) state‐space anomaly random effects process...
Proposals for marine conservation measures have proliferated in the last 2 decades due to increased reports of fishery declines and interest conservation. Fishers fisheries managers often disagreed strongly when discussing controls on fisheries. In such situations, ecosystem-based models fisheries-stock assessment can help resolve disagreements by highlighting trade-offs that would be made under alternative management scenarios. We extended analytical framework modeling including additional...
Uncertainty is inevitable in the characterisation of a geotechnical site, especially due to inherently heterogeneous nature ground. In this paper, method for characterising subsurface with limited cone penetration test (CPT) data proposed. The based on integrating predictions CPT parameters probabilistic approach subsoil classification at CPTs. predicted stratigraphy able capture spatial variability soil measured via CPTs and takes account uncertainties that arise from transforming...
A 3D slope stability problem with spatially varying shear strength parameters has been analysed using the random finite element method. This method links fields of variables, in this case, cohesion and friction angle, within a Monte Carlo framework. The influence spatial variability on calculated factors safety failure consequence investigated, results compared simpler solution proposed by Vanmarcke. approach predicted lower probability under certain conditions, although, at high levels...
An age-structured, spatial survey-based assessment model (SSURBA) is developed and applied to the Grand Banks stock (NAFO Divisions 3LNO) of American plaice (Hippoglossoides platessoides) in Newfoundland Labrador. The state-space fit annual (i.e., three divisions) size-at-age research vessel (RV) survey indices that are assumed be proportional abundance. We index catchability (q) as a logistic function fish length, which varies with age, cohort, time survey; therefore, facilitates estimation...
We present a comprehensive analysis of estimation fisheries Maximum Sustainable Yield (MSY) reference points using an ecosystem model built for Mille Lacs Lake, the second largest lake within Minnesota, USA. Data from single-species modelling output, extensive annual sampling species abundances, catch-survey, stomach-content predatory-prey interactions, and expert opinions were brought together framework Ecopath with Ecosim (EwE) model. An increase in water temperature was observed last few...
Various simplified approaches are used to calculate the characteristic values of shear strength properties, which have then been in deterministic stability analyses a dyke cross-section. The calculated factors safety compared with 5-percentile ‘system response’ cross-section, using more exhaustive random finite-element method (RFEM), is consistent requirements Eurocode 7. methods accounting for variance reduction due averaging property mostly give within 10% RFEM solution, whereas factor...