A5022705091- Marine and fisheries research
- Crustacean biology and ecology
- Coral and Marine Ecosystems Studies
- Parasite Biology and Host Interactions
- Marine Bivalve and Aquaculture Studies
- Marine Ecology and Invasive Species
- Environmental Toxicology and Ecotoxicology
- Aquaculture Nutrition and Growth
- Fish Ecology and Management Studies
- Identification and Quantification in Food
- Marine animal studies overview
- Marine Biology and Ecology Research
- Fish Biology and Ecology Studies
- Underwater Acoustics Research
- Agricultural Economics and Policy
- Environmental Impact and Sustainability
- Indigenous Studies and Ecology
- Aquaculture disease management and microbiota
- Coastal and Marine Management
- Genetic diversity and population structure
- Insect and Pesticide Research
- Fish biology, ecology, and behavior
- Ocean Acidification Effects and Responses
- Education, Healthcare and Sociology Research
- Offshore Engineering and Technologies
Norwegian Institute of Marine Research
2016-2025
University of Bergen
1989
Abstract Marine ecosystem-based management (EBM) is recognized as the best practice for managing multiple ocean-use sectors, explicitly addressing tradeoffs among them. However, implementation perceived challenging and often slow. A poll of over 150 international EBM experts revealed progress, challenges, solutions in worldwide. Subsequent follow-up discussions with 40 these identified remaining impediments to further EBM: governance; stakeholder engagement; support; uncertainty about...
Several species of wrasse (Labridae) are used as cleaner fish to remove salmon lice from farmed Atlantic salmon. We estimated the fishery and use in Hardangerfjord. The numbers labrids on rainbow trout farms varied between 86,000 251,000 2002–2006, but increased much 1.1 million 2009 2010. A total 93,500 kg (around 1.54 million) were reported landed during 2000–2010. Corkwing (Symphodus melops) was by far most important species: 52% weight 56% number. Ballan (Labrus bergylta) made up 34%...
Abstract Aquaculture-based enhancement of marine fisheries includes sea ranching, stock enhancement, and restocking. A rapidly evolving context maturing science base have effectively put these approaches into the management toolbox. Among contextual factors are (1) a rapid expansion captive breeding domestication to new species, (2) governance systems that address common dilemma, (3) global environmental change impacts on coastal increasingly call for active maintaining or increasing yields...
Abstract Agnatt, A-L., Kristiansen T. S., and Jorstad K. E. 2007. Growth, reproductive cycle, movement of berried kuropean lobsters (Homarus gammarus) in a local stock off southwestern Norway. – ICES Journal Marine Science, 64: 288–297. The Norwegian fishery for the European lobster collapsed between 1960 1980, to <10% its pre-1960 level, since then spawning seems be too low generate good recruitment. In 1998, project evaluate feasibility effect protecting female as management restriction...
Anti-sea lice pesticides, used in the salmonid aquaculture industry, are a growing environmental concern due to their potential adversely affect non-target crustaceans. Azamethiphos and deltamethrin two bath treatment pesticides on salmon farms Norway, however, limited information is available impact European lobster (Homarus gammarus) larvae Norwegian marine environment. Here, we firstly report lethal (LC50) effective (EC50) concentrations of azamethiphos for stage I II larvae, following...
Abstract. The ongoing warming and acidification of the world's oceans are expected to influence marine ecosystems, including benthic resources. Ocean may especially have an impact on calcifying organisms, European lobster (Homarus gammarus) is among those species at risk. A project was initiated in 2011 aiming investigate long-term effects ocean early life-cycle under two temperatures. Larvae were exposed pCO2 levels ambient water (water intake 90 m depth), medium 750 (pH = 7.79) high 1200...
This study describes experiments carried out to examine effects of the antiparasitic drug teflubenzuron, used in delousing farmed salmon, on a non-target species, European lobster (Homarus gammarus). Juvenile lobsters were fed two doses 10 and 20mg/kg successively for 7 days corresponding standard medication fish (10mg/kg day) twice dose (20mg/kg day). Monitoring lasted 3 months include at least one moulting period all individuals. Cumulative mortality was higher replicates given medicated...
Abstract The European lobster ( Homarus gammarus ) has been the subject of aquaculture and related research efforts for last 150 years, due to both wild fishery cultural value species. Since middle 20th century, increasing anthropogenic pressure led a severe decline in fish shellfish stocks, including H. , with some fisheries yet recover. is amongst most exclusive valuable products, whilst management measures have implemented safeguard an increasingly credible approach help secure...
Abstract Several hundred Atlantic cod (Gadus morhua L.) were collected from selected spawning grounds along the Norwegian coast in March 2002. Four areas or regions that represent a wide range of environmental conditions chosen for our breeding experiments: Porsangerfjord, Tysfjord, Helgeland, and Øygarden. Cod transported to Øygarden near Bergen, individually tagged, kept sea cages. In both 2003 2004, total 40 family groups (adult pairs) representing four monitored their performance...
Agnalt A-L. 2008. Fecundity of the European lobster (Homarus gammarus) off southwestern Norway after stock enhancement; do cultured females produce as many eggs wild females? – ICES Journal Marine Science, 65: 164–170.
The age information of commercially important species is crucial in fisheries management. Age various fish and molluscan has routinely been determined by counting annual growth bands deposited within the hard structures. In crustaceans such structures were previously believed to be lost replaced due molting. However, a technique was recently developed use structure retained through molting as an indicator. present study, applicability novel investigated for four crustacean collected from...
Abstract The snow crab (Chionoecetes opilio) is a newly established species in the Barents Sea, increasing both distribution and abundance recent years. We explore potential importance of North-east Arctic cod (Gadus morhua) predation structuring population expansion through an analysis stomach content data from 2003 to 2018. Spatio-temporal patterns within diet are assessed across years, between seasons, as well ontogenetic trends, including predator–prey size relationships. Snow represents...
Abstract After the initial opening of Bering Strait 5.5–-5.0 My ago, there occurred several periods with exchange marine species between Pacific and Atlantic Oceans. The snow crab ( Chionoecetes opilio) was first reported in Barents Sea (BAR) 1996, presumably following introduction via Ballast water. Since then, population has increased size distribution become self-reproducing economic importance. We implemented genetic analysis to identify origin pathway BAR crab. Samples from BAR, Alaska,...
Hydrogen peroxide (H 2 O ), a pesticide used in salmonid aquaculture, is released directly into the environment where nontarget organisms are at risk of exposure. We determined threshold concentrations for mortality Calanus spp., dominant zooplankton species North Atlantic, and assessed sublethal effects, focusing on escape response oxygen consumption rates (OCRs) as behavioral physiological assays. One-hour exposure to 170 mg·L −1 (i.e., 10% recommended H treatment) was lethal copepodite...
The high loss of newly released hatchery-reared European lobster (Homarus gammarus) juveniles for stock enhancement is believed to be the result maladaptive anti-predator behaviour connected deprived stimuli in hatchery environment. Our objective was learn if an enriched environment enhances shelter-seeking and survival. In “naïve” treatment, were raised single compartments without substrate shelter whereas “exposed” treatment experienced substrate, interactions with conspecifics. Three...