A5030117525- Fish Ecology and Management Studies
- Marine and fisheries research
- Fish Biology and Ecology Studies
- Hydrology and Sediment Transport Processes
- Aquatic Invertebrate Ecology and Behavior
- Parasite Biology and Host Interactions
- Aquaculture disease management and microbiota
- Wildlife-Road Interactions and Conservation
- Environmental DNA in Biodiversity Studies
- Environmental Science and Water Management
- Water Quality Monitoring Technologies
- Marine animal studies overview
- Fire effects on ecosystems
- Marine Bivalve and Aquaculture Studies
- Fish biology, ecology, and behavior
- Landslides and related hazards
- Hydrology and Watershed Management Studies
National Institute of Water and Atmospheric Research
2025
Minnesota Department of Natural Resources
2022-2023
University of Minnesota
2022-2023
NORCE Norwegian Research Centre
2019-2021
Fafo Foundation
2021
University of Bergen
2017-2020
Uni Research (Norway)
2016-2018
Memorial University of Newfoundland
2013-2017
Abstract The effects of sea lice on the marine survival wild salmonids are widely debated. In Norway this debate has reached a crescendo as Norwegian government recently ratified management system where growth in salmonid aquaculture industry will be conditional regional estimated impact salmon fish. Sea have thus become most prominent obstacle to stated political aim quintupling production by 2050. Scientific documentation that is robust. However, it also evident strongly impacted other...
Abstract A systematic review and meta-analysis was conducted to evaluate the appropriate tag:fish size ratio when tagging juvenile salmonids (genera Oncorhynchus , Salmo Salvelinus ). The yielded 18 publications with 211 control treatment groups reporting results from laboratory studies on effects of passive integrated transponder (PIT) tags, plus a small number additional acoustic transmitters. PIT showed significant heterogeneity among respect mortality. Meta-regression revealed that...
The bluegill bully is a small (TL < 100 mm) eleotrid fish that inhabits fast flowing habitats in New Zealand rivers. Bluegill bullies are amphidromous with larvae developing at sea and juveniles migrating upriver to adult rearing freshwaters. Throughout Zealand, more than 90% of adults occur within 50 km upstream river mouths. This species, therefore, has relatively restricted longitudinal distribution rivers compared most other species Zealand. In the Motu River, females were smaller males...
Abstract Atlantic salmon is often a focal species of restoration efforts throughout the north and it therefore an excellent case study for how best to design programmes address mitigate threats correct population declines. This perspective written promote work that has been accomplished towards populations synthesize we believe lessons can be used effectively support by management agencies restore populations. We reviewed where needed salmon, agreed on definitions three levels successful...
Wildfire is a common natural disturbance that can influence stream ecosystems. Of particular concern are increases in water temperature during and following fires, but studies of these phenomena uncommon. We examined effects wildfires 2000 on maximum for suite second- to fourth-order streams with range burn severities the Bitterroot River basin, Montana. Despite many sites burning at high severity, there were no apparent fires. One month after fire subsequent year, temperatures within burns...
Recent advances in the ability to quantify longitudinal connectivity of riverine systems is enabling a better understanding how affects fish assemblages. However, role relative other factors, such as land use, structuring biological assemblages just emerging. We assessed relevance structural index stream communities at relatively large scale (across five watersheds Lake Ontario) while controlling for confounding habitat variables, elevation, and topology. The results were determine whether...
Abstract Anthropogenic barriers to fish passage, such as culverts and dams, are major factors impeding the persistence recovery of aquatic species. Considerable work has focused on mitigating these impacts; however, activities associated with measuring restoring connectivity ecosystems often face challenges in determining passability by Hydrological modeling software that incorporates biological aspects a focal species is used relatively inexpensive method for assessing barrier restoration...
AEI Aquaculture Environment Interactions Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 8:511-525 (2016) - DOI: https://doi.org/10.3354/aei00195 Estimating temporal overlap between post-smolt migration of Atlantic salmon and lice infestation pressure from fish farms K. W. Vollset1,*, B. T. Barlaup1, S. Mahlum1, P. A. Bjørn2, O. Skilbrei2,† 1Uni Research, Uni Environment, LFI, 5006 Bergen,...
The restoration of 4 partial stream barriers was evaluated in watersheds Terra Nova National Park, Newfoundland, Canada from 2009 to 2011. Brook trout ( n = 462) were tagged and tracked moving through our study sites using passive‐integrated transponder telemetry the actions assessed 3 different measures: passage success rates; range passable flows; availability flows. We considered observed results within a before‐after‐control‐impact (BACI) design that included reference reaches...
Walleye ( Sander vitreus) are an ecologically important species managed for recreational, tribal, and commercial harvest. prefer cool water low light conditions, therefore changing temperature clarity potentially impacts walleye habitat populations across the landscape. Using survey data collected from 1993 to 2018 312 lakes in Minnesota, we evaluated relationship between thermal-optical relative abundance of small (0–300 mm), medium (300–450 large (450 + mm) walleye. Thermal-optical was...
Migration behaviour and estuarine mortality of cultivated Atlantic salmon Salmo salar smolts in a 16 km long estuary were studied using two methods: (1) acoustic telemetry (2) group tagging combination with trap nets. Progression rates surviving individuals through the relatively slow both methods [0·38 L T (total length) s −1 v . 0·25 ]. In 2012, progression rate was from river to (0·55 ) first part (0·31 ), but increased thereafter (1·45–2·21 ). 2013, fast (4·31 slower (0·18–0·91 Survival...
Abstract The production of Atlantic salmon in aquaculture has grown substantially over the last 40 years. unintentional release domesticated poses a significant risk to long‐term persistence wild populations through ecological interactions and genetic introgression. Our ability link farmed escaped rivers is still limited hinders identifying appropriate capacity reduce unwanted between salmon. Here we use 14‐year dataset escapee abundance model how priori selected covariables abundance,...
Floating passive‐integrated transponder (PIT) antennae and smolt traps were used to study the time of sea entry relative recapture wild hatchery‐reared Atlantic salmon Salmo salar released below above a lake formed in Vosso River. In total, 8.4 4.1% tagged hatchery fish, respectively, detected leaving river ( i.e . entry). Wild smolts 16 days before lake, which also showed 52% lower probability detection during out‐migration. Hatchery out sync with approximately 2 months later than from both...
AEI Aquaculture Environment Interactions Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 11:417-427 (2019) - DOI: https://doi.org/10.3354/aei00326 Swimming with fishes: validating drift diving identify farmed Atlantic salmon escapees in wild S. Mahlum1,2,*, H. Skoglund1, T. Wiers1, E. Norman1, B. Barlaup1, V. Wennevik3, K. A. Glover2,3, Urdal4, G. Bakke3, W. Vollset1 1NORCE Norwegian...
The habitat use of adult Atlantic salmon was evaluated in a fjord complex western Norway. A representative sample 9 wild and 29 hatchery origin were tagged with acoustic tags tracked 28 stationary receivers from June 2012 to river entry. Using movement-based kernel density estimation, we identified near shore relation National Salmon Fjord (NSF) adjoining aquaculture sites. Furthermore, compared progression rates vertical distributions among units. Mean residence time for marking entry 30...