A5011605480- Fish Ecology and Management Studies
- Marine and fisheries research
- Parasite Biology and Host Interactions
- Bird parasitology and diseases
- Fish Biology and Ecology Studies
- Aquatic Invertebrate Ecology and Behavior
- Identification and Quantification in Food
- Marine animal studies overview
- Insect and Pesticide Research
- Animal Behavior and Reproduction
- Aquaculture disease management and microbiota
- Myxozoan Parasites in Aquatic Species
- Marine Ecology and Invasive Species
- Wildlife Ecology and Conservation
- Food Waste Reduction and Sustainability
- Arctic and Antarctic ice dynamics
- Marine Bivalve and Aquaculture Studies
- Culinary Culture and Tourism
- Isotope Analysis in Ecology
- Indigenous Studies and Ecology
UiT The Arctic University of Norway
2009-2021
Norwegian Institute of Marine Research
2015-2018
AEI Aquaculture Environment Interactions Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 7:91-113 (2015) - DOI: https://doi.org/10.3354/aei00142 REVIEW Effects of salmon lice Lepeophtheirus salmonis on wild sea trout Salmo trutta—a literature review Eva B. Thorstad1,*, Christopher D. Todd2, Ingebrigt Uglem1, Pål Arne Bjørn3, Patrick G. Gargan4, Knut Wiik Vollset5, Elina Halttunen3, Steinar...
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...
Determining the mechanisms driving range-wide reductions in Atlantic salmon marine survival is hindered by an insufficient understanding of their oceanic ecology and distribution. We attached 204 pop-up satellite archival tags to post-spawned when they migrated ocean from seven European areas maiden North American captured at sea West Greenland. Individuals further north east than previously reported displayed increased diving activity near oceanographic fronts, emphasizing importance these...
To study smolt behaviour and survival of a northern Atlantic salmon Salmo salar population during river descent, sea entry fjord migration, 120 wild S. were tagged with acoustic tags registered at four automatic listening station arrays in the mouth north Norwegian River Alta throughout Fjord. An estimated 75% post‐smolts survived from mouth, through estuary first 17 km fjord. Survival rates varied fork length ( L F ), ranged 97·0 to 99·5% −1 . On average, spent 1·5 days (36 h, range 11–365...
Sea trout face growth-mortality trade-offs when entering the sea to feed. Salmon lice epizootics resulting from aquaculture have shifted these trade-offs, as salmon might both increase mortality and reduce growth of trout. We studied behavioural adaptations wild in a large-scale experiment with acoustic telemetry an intensive area that was fallowed (emptied fish) synchronically biannually, creating large variations concentrations. tagged 310 during 3 years, gave half individuals prophylaxis...
Abstract Salmon lice infestation is a major challenge for the aquaculture industry in Norway, threatening wild salmonid populations and causing welfare problems farmed salmon. Lice dispersion patterns are simulated by combining high-resolution hydrodynamic model Norwegian coast fjords with an individual-based salmon lice. We here present results from Altafjorden, sub-arctic fjord large stocks of salmonids, where inner part protected as National Fjord. The outer hosts several fish farms, our...
Atlantic salmon (Salmo salar) often survive spawning and migrate back to the sea feed, either shortly after in autumn or following spring. We conducted a 4-year observational field study using telemetry evaluate determinants of migration timing postspawners (kelts). found that individuals with low energy reserves migrated early risky but productive marine habitat, whereas greater stayed safe less river habitat until staying became energetically more costly than migrating. For males,...
Little is known about Atlantic salmon behaviour during the last phase of marine homing migration and subsequent river entry. In this study, 56 adult in Alta Fjord northern Norway were equipped with acoustic transmitters. Salmon generally followed coastline, but their horizontal distribution was also affected by wind-induced spreading water across fjord. Mean swimming depth shallow (2.5–0.5 m), dives down to 30 m depth. Timing entry not flow, diel periodicity, or tidal cycles. Movements part...
AEI Aquaculture Environment Interactions Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 1:215-224 (2011) - DOI: https://doi.org/10.3354/aei00021 An effective method for recapture of escaped farmed salmon Cedar M. Chittenden1,2,*, Audun H. Rikardsen1, Ove T. Skilbrei3, Jan G. Davidsen1,4, Elina Halttunen1, Jofrid Skarðhamar3, R. Scott McKinley2 1Department Arctic and Marine Biology,...
MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 592:243-256 (2018) - DOI: https://doi.org/10.3354/meps12403 Migration of Atlantic salmon post-smolts in a fjord with high infestation pressure lice Elina Halttunen1,*,**, Karl-Øystein Gjelland2,**, Kevin A. Glover3,4, Ingrid Askeland Johnsen3, Rosa-Maria Serra-Llinares1, Øystein Skaala3, Rune Nilsen1,...
Abstract Impacts of sea lice (Lepeophtheirus salmonis or Caligus spp.) on wild salmonids is currently one the most important issues facing management fish farms in salmon producing countries northern hemisphere. Surveillance Atlantic (Salmo salar) often hampered by ability to catch enough migrating post-smolts. Therefore, abundance anadromous trout trutta) used infer post-smolt. However, assumption that there a relationship between and has never been tested. Here we use dataset post-smolt...
Abstract With different ecological characteristics amongst salmonid species, their response to parasitic infestation is likely vary according spatial and temporal overlap with the parasite. This study investigated host–parasite interactions three species of salmonids ectoparasitic salmon louse, Lepeophtheirus salmonis. To determine any variation in parameters salmonids, single population groups Atlantic (Salmo salar), chinook (Onchorhynchus tshawytscha), previously-infested naïve sea trout...
The potential of the gill maggot Salmincola salmoneus for use as an indicator repeat spawning in Atlantic salmon Salmo salar was studied adult fish captured during their return migration to River Alta ( n = 659) and Namsen 540) Norway. Eighty‐eight 49% previous spawners identified by scale readings were infected with S. two rivers, respectively. can be used a reliable, rapid objective field nearly all (99·4%) spawners, although it is important have appropriate background information on...
Salmon lice are external parasites on salmonids in the marine environment.During recent years, s ea abundance has been increased due to presence of salmon farming using on-growing floating seas-cages.Amongst salmonids, sea trout is especially vulnerable infestations, because during their mari ne residence they typically remain coastal waters, where open net cage Atlantic farms situated.In this report existing knowledge about effects populations NE waters reviewed, assessing current situation...