A5063630196- Identification and Quantification in Food
- Environmental DNA in Biodiversity Studies
- Genetic diversity and population structure
- Fish Ecology and Management Studies
- Marine and fisheries research
- Microbial Community Ecology and Physiology
- Marine and coastal plant biology
- Marine animal studies overview
- Fish Biology and Ecology Studies
- Biocrusts and Microbial Ecology
- Physiological and biochemical adaptations
- Parasite Biology and Host Interactions
- Reproductive biology and impacts on aquatic species
- Species Distribution and Climate Change
- Microplastics and Plastic Pollution
- Aquatic Ecosystems and Phytoplankton Dynamics
The FRAM Centre
2021-2025
Norwegian Institute of Marine Research
2021-2025
UiT The Arctic University of Norway
2007-2014
ABSTRACT The genus Sebastes in the North Atlantic comprises of long lived deep‐waters species that have been extensively fished upon, and many stocks are severely depleted across Atlantic. This is particularly evident for norvegicus . In recent papers, cryptic indicated within this molecular markers therefore needed to provide identification species, including as a basis advice regarding management rebuilding stocks. A suite 2800 Single Nucleotide Polymorphism (SNP) were identified from...
The redfishes (genus Sebastes ) are long-lived, commercial species in the North Atlantic. Excessive harvest through decades has led to a decline mature population of golden redfish ( norvegicus Norwegian waters, which is currently considered severely depleted. Accumulating genetic evidence suggests more complex structure within this genus Atlantic, recently inspired hypotheses cryptic S. norvegicus. Despite apparent divergence between two types, they have yet be verified morphologically....
Abstract Quantifying the biomass, or number of individuals, diversity, and distribution marine species is a critical aspect understanding managing ecosystems. In recent years, there has been growing interest in using environmental DNA (eDNA) for ecosystem management biodiversity assessment. However, main challenge hindering eDNA applicability inability to infer absolute abundances from multispecies analysis (eDNA metabarcoding). this study, we demonstrate way forward by estimating abundance...
Abstract Environmental DNA (eDNA) has gained popularity as a tool for ecosystem biomonitoring and biodiversity assessment. Although much progress been made regarding laboratory fieldwork protocols, the issue of sampling efficiency requires further investigation, particularly in three‐dimensional marine systems. This study focuses on fish community composition ecosystems aims to analyze design given effort distinguishing between different communities. We sampled three fjords Northern Norway,...
Androgenesis is a form of uniparental reproduction leading to progenies inheriting only the paternal set chromosomes. It has been achieved with variable success in number freshwater species and can be attained by artificial fertilization genetically inactivated eggs following exposure gamma (γ), X-ray or UV irradiation (haploid androgenesis) restoration diploidy suppression mitosis using pressure thermal shock. The conditions for genetic inactivation maternal genome European sea bass...
Abstract: Although photoperiod is considered as a major environmental cue for timing of seasonal events in fish, little known about the photic information perceived by fish different aquatic environments. The strongly Arctic charr, Salvelinus alpinus , reside lakes covered thick ice and snow throughout dark winter north. In present study, we have measured diel changes their plasma melatonin concentrations from September to June Lake Storvatnet (70°N), northern Norway. addition, vitro...
Movement diversity within species represent an important but often neglected, component of biodiversity that affects ecological and genetic interactions, as well the productivity exploited systems. By combining individual tracking data from acoustic telemetry with novel analyses, we describe movement two Atlantic cod Gadus morhua ecotypes in high-latitude fjord systems: highly migratory Northeast Arctic (NEA cod) supports largest fishery world, more sedentary Norwegian coastal cod, which is...
Abstract The cold-adapted polar cod Boreogadus saida, a key species in Arctic ecosystems, is vulnerable to global warming and ice retreat. In this study, 1257 individuals sampled 17 locations within the latitudinal range of 75–81°N from Svalbard East Siberian Sea were genotyped with dedicated suite 116 single-nucleotide polymorphic loci (SNP). overall pattern isolation by distance (IBD) found was driven two easternmost samples (East Laptev Sea), whereas no differentiation registered area...
To protect and restore ecosystems biodiversity is one of the 10 challenges identified by United Nations’s Decade Ocean Science. In this study we used eDNA from sediments collected in two fjords Svalbard archipelago compared taxonomic composition with traditional methods through metabarcoding, targeting mitochondrial CO1, to survey benthos. Clustering 21.6 mill sequence reads a d value 13 swarm , returned about 25 K OTU reads. An identification search BOLD database 12,000 taxonomy annotated...
Abstract Many marine organisms have a permanent presence both inshore and offshore spawn in multiple areas, yet their status as separate populations or stocks remain unclear. This is the situation for northern shrimp (Pandalus borealis) around Arctic Ocean, which Norway represents an important income small-scale coastal fishery large-vessel fleet. In Norwegian waters, we uncovered two distinct genetic clusters, viz. Barents Sea cluster. Shrimps with mixed heritage from genetically different...
ABSTRACT Environmental DNA (eDNA) detection employing quantitative PCR (qPCR) and droplet digital (ddPCR) offers a non‐invasive efficient approach for monitoring aquatic organisms. Accurate sensitive quantification of eDNA is crucial tracking rare invasive species understanding the biodiversity abundance distribution This study compares sensitivity precision qPCR ddPCR surveys through Bayesian inference using latent parameters from both known concentration (standards) environmental samples...
Knowledge of trophic interaction is necessary to understand the dynamics ecosystems and develop ecosystem-based management. The key data measure these interactions should come from large-scale diet analyses with good taxonomic resolution. To that end, molecular methods analyze prey DNA guts feces provide high-resolution dietary data. However, analysis may also produce unreliable results if samples are contaminated by external sources DNA. Employing freshwater European whitefish (
ABSTRACT Understanding the dietary habits and trophic niches of species is crucial for conservation management ecosystems. Science‐based fisheries requires large‐scale data prey parasites fish that enables analysis multitrophic interactions in an ecosystem. Using one commercially exploited beaked redfish ( Sebastes mentella ) from Barents Sea, our study aims to understand its diet composition parasites. We used 12S COI markers analyze stomach intestine contents uncleaned, water‐cleaned,...