A5000911323- Fish Ecology and Management Studies
- Marine and fisheries research
- Marine animal studies overview
- Fish biology, ecology, and behavior
- Reproductive biology and impacts on aquatic species
- Aquaculture Nutrition and Growth
- Underwater Acoustics Research
- Physiological and biochemical adaptations
- Biomimetic flight and propulsion mechanisms
- Underwater Vehicles and Communication Systems
- Ichthyology and Marine Biology
- Animal Vocal Communication and Behavior
- Crustacean biology and ecology
- Marine and coastal plant biology
- Sperm and Testicular Function
- Scientific Research and Discoveries
- Coral and Marine Ecosystems Studies
- Parasites and Host Interactions
- Parasitic Diseases Research and Treatment
- Environmental Toxicology and Ecotoxicology
- Marine Bivalve and Aquaculture Studies
- Electromagnetic Fields and Biological Effects
- Maritime Navigation and Safety
- Animal Behavior and Reproduction
- Helminth infection and control
Norwegian Institute of Marine Research
2018-2025
Acoustics (Norway)
2021-2025
Austevoll Seafood (Norway)
2019
University of Miami
2016-2019
Glass eels have a magnetic compass, and their orientation abilities are linked to endogenous circatidal clock.
Abstract The number and size of offshore wind (OW) turbines is increasing rapidly. OW produce continuous, low-frequency noise that could impact marine fish dispersing/migrating through the facilities. Any such would be relevant for larval stages, which have limited possibility to swim away from If directional movement larvae at sea impacted by continuous sound unknown. We observe behavior Atlantic cod ( N = 89) in response while they are drifting a Norwegian fjord inside transparent...
Abstract Atlantic cod ( Gadus morhua ) and haddock Melanogrammus aeglefinus are found on both sides of the North often their spawning overlaps in time space. Yet, has a much more variable recruitment than areas where they sympatric, difference that is consistent across ecosystems. At larval stages, differences feeding behavior have consequences for growth survival, potentially contributing to between these species. We tested whether displayed different swimming under abundant food...
Abstract The performance of a single commercial accelerometer‐based underwater acoustic vector sensor (AVS) in resolving azimuth was evaluated. method involves calculating the active intensity an signal to determine dominant directionality pressure field as function time and frequency. While this efficiently displays bearings for specific frequencies, there are very few assessments its all possible using AVS. Field experiments were conducted with AVS placed on sea bottom source suspended...
Abstract Anguillid eels grow in freshwater but spawn the open ocean. The cues that guide over long distances to spawning area are unknown. Earth's magnetic field can provide directional and positional information is likely used by catadromous during their migration; as magnetosensitivity compass orientation have been reported eels. To test whether this theoretically possible, we compared migratory routes of five species temperate undertake migrations with geomagnetic distribution/spawning...
Abstract The European eel ( Anguilla anguilla ) hatches in the Sargasso Sea and migrates to North African freshwater. As glass eels, they reach estuaries where become pigmented. Glass eels use a tidal phase-dependent magnetic compass for orientation, but whether their direction is innate or imprinted during migration unknown. We tested hypothesis that imprint tidal-dependent at recruit. collected 222 from flowing different cardinal directions Austevoll, Norway. observed orientation of...
Abstract Anguillid eels were once considered to be the classic example of catadromy. However, alternative life cycles have been reported, including skipping freshwater phase and habitat shifting between fresh, brackish, saltwater throughout growth phase. There is a lack knowledge regarding these alternate strategies, for example, proportion individuals in population that adopt them compared We provide description cycle strategies temperate anguillids, their possible drivers, methods...
Abstract Stakeholders need scientific advice on the environmental impacts of offshore wind (OW) before facilities are installed. The utility conventional monitoring methods as a basis for forecasting OW is limited because they do not explain causes observed effects. We propose multistep approach, based process-oriented hypothesis testing, targeted and numerical modeling, to answer key stakeholder questions about planning an facility: Q1—Where we place future farms so that ecosystem...
Atlantic haddock (Melanogrammus aeglefinus) is a commercially important species of gadoid fish. In the North Sea, their main spawning areas are located close to northern continental slope. Eggs and larvae drift with current across Sea. However, fish many taxa can orient at sea using multiple external cues, including Earth's magnetic field. this work, we investigated whether passively or We observed behavior 59 102 swimming in behavioral chamber deployed Norwegian Sea laboratory,...
In the North Sea, number and size of offshore wind (OW) turbines, together with associated network High Voltage Direct Current (HVDC) subsea cables, will increase rapidly over coming years. HVDC cables produce magnetic fields (MFs) that might have an impact on marine animals encounter them. One fish species is at risk exposure to MF OW lesser sandeel (Ammodytes marinus), a keystone Sea basin. Lesser could be exposed as larvae, when they drift in proximity turbines. Whether MFs behavior...
High-voltage direct current (HVDC) subsea cables are used to transport power between locations and from/to nearshore offshore facilities. HVDC produce magnetic fields (B-fields) that could impact marine fish. Atlantic haddock (Melanogrammus aeglefinus) is a demersal fish at risk of exposure anthropogenic B-fields. Their larvae drift over the continental shelf, use Earth's field for orientation during dispersal. Therefore, from alter their behavior. We tested behavior 92 using setup designed...
Exposure to environmentally relevant concentrations of oil could impact survival fish larvae in situ through subtle effects on larval behavior. During the period, Atlantic haddock (Melanogrammus aeglefinus) are transported toward nursery grounds by ocean currents and active swimming, which can modify their drift route. Haddock sensitive dispersed oil; however, whether exposure during development impacts ability swim is unknown. Here, we exposed embryos 10 80 μg oil/L (0.1 0.8 ∑PAH/L) crude...
Links between the lunar cycle and life (migration patterns, locomotor activity, pulses in recruitment) of European eel (Anguilla anguilla) are well documented. In this study, we hypothesized that orientation glass eels at sea is related to cycle. The hatches Sargasso Sea migrates across Atlantic Ocean towards Europe. Upon reaching continental shelf, larvae metamorphose into migrate up estuaries, where some individuals colonize freshwater habitats. How navigate pelagic waters still an open...
Abstract The European eel hatches in the Sargasso Sea and migrates across Atlantic Ocean toward Europe. At continental shelf, larvae metamorphose into glass eels then recruit to coastal habitats estuaries. Among other cues, orient situ using lunar but what role this compass plays their recruitment coast is unknown. To assess this, we incorporated empirical observations of swimming lunar‐driven orientation a biophysical advection model. We simulated dispersal drifting with North Current test...
The dispersal of fish larvae during the early life stages plays an important role in recruitment. Together with oceanographic processes, larval orientation and swimming behavior significantly influences dispersal. However, currently there is no information situ for most subpolar species. Atlantic herring (Clupea harengus) ecologically commercially component North ecosystem. This species has sustained a large fishery over century, its stocks have experienced both dramatic collapse recovery....
Abstract The movement patterns of three commercially important wrasse ( Labridae ) species inside a small marine protected area (~ 0.15 km 2 on the west coast Norway were analysed over period 21 months. mean distance between capture and recapture locations varied 10 187 m, was season specific. extent not related to body size or sex. These results imply that network strategically located areas can be used as management tools protect wrasses from size‐ sex‐selective fishing mortality.
Lesser sandeel (Ammodytes marinus) is widely distributed in North Sea ecosystems. Sandeel acts as a critical trophic link between zooplankton and top predators (fish, mammals, sea birds). Because they live buried the sand, may be directly affected by rapid expansion of anthropogenic activities linked to their habitat on bottom (e.g., hydrocarbon extraction, offshore renewable energy, subsea mining). It is, therefore, important understand impact cumulative environmental stressors this...
To orient themselves in their environment, animals integrate a wide array of external cues, which interact with several internal factors, such as personality. Here, we describe behavioral protocol designed for the study influence zebrafish personality on orientation response to multiple environmental specifically water currents and magnetic fields. This aims understand whether proactive or reactive display different rheotactic thresholds (i.e., flow speed at fish start swimming upstream)...
Sources of anthropogenic noise in the ocean have temporal and directional characteristics. Characterizing soundscape requires identifying directionality sources addition to non-directional sound pressure. An underwater acoustic vector sensor (AVS) can be used provide incoming noise, concomitant We present an analysis measurements from AVS deployed a Norwegian fjord which there is frequent commercial ship traffic. assessed various known unknown it interpret associated The consists...
Abstract Static magnetic fields (B-fields) are introduced in marine ecosystems by anthropogenic sources such as subsea power cables. Larvae of the gadoids Atlantic haddock (Melanogrammus aeglefinus) and cod (Gadus morhua) disperse over continental shelf may encounter B-fields, which could alter their behavior. We tested behavior 184 gadoid larvae while they were being exposed to a B-field (22–156 μT), is intensity range that produced high-voltage direct current cable, for duration 10 min...