A5013355314- Marine and fisheries research
- Fish Ecology and Management Studies
- Reproductive biology and impacts on aquatic species
- Marine animal studies overview
- Aquaculture Nutrition and Growth
- Fish Biology and Ecology Studies
- Fish biology, ecology, and behavior
- Ichthyology and Marine Biology
- Physiological and biochemical adaptations
- Water Quality Monitoring Technologies
- Underwater Acoustics Research
- Magnetic and Electromagnetic Effects
- Isotope Analysis in Ecology
- Evolution and Paleontology Studies
- Geomagnetism and Paleomagnetism Studies
- Marine Bivalve and Aquaculture Studies
- Aquatic life and conservation
- Cephalopods and Marine Biology
- Marine and coastal ecosystems
- Coral and Marine Ecosystems Studies
- Insect Pheromone Research and Control
- Animal Vocal Communication and Behavior
- Electromagnetic Fields and Biological Effects
- Food Industry and Aquatic Biology
- Arctic and Russian Policy Studies
Swedish University of Agricultural Sciences
2015-2025
Swedish National Board of Fisheries
1998-2014
Lund University
2013
University of Gothenburg
1972-1993
Chalmers University of Technology
1986
Fresh data on the timing and speed of oceanic spawning migration European eels suggest a new paradigm for ecology.
Abstract A list of 138 positions with records Lophelia pertusa is compiled from all published and unpublished investigations in the area including material BIOFAR research programme. In addition, Solenosmilia variabilis, another species branching coral new to reported. The are areas that dominated by northeastern Atlantic water (NEA W) depths 200 c. 1000 m. highest abundance tends be depth range where bottom slope critical internal waves semidiurnal frequency. causal link behind this...
MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 288:295-309 (2005) - doi:10.3354/meps288295 Hearing in fish and their reactions sounds from offshore wind farms Magnus Wahlberg1,2,3,*, Håkan Westerberg3,4 1Naturens Stemme, Ewaldsgade 4, 2. sal, 8000 Aarhus C, Denmark2Department of Zoophysiology, University, C. F. Mollers Alle Building 131, Denmark3Tjärnö...
Abstract Anguillid eels are found globally in fresh, transitional and saline waters have played an important role human life for centuries. The population status of several species is now significant concern. threats to populations include direct exploitation at different stages, blockages migratory routes by dams other structures, changes river basin management that impact habitat carrying capacity suitability, pollution, climate change, diseases parasites. While much has been done...
The European eel (Anguilla anguilla) is critically endangered (according to the most recent IUCN assessment) and has suffered a 95% decline in recruitment since 1980s, attributed part factors occurring during marine phases of its life-cycle. As an adult, undertakes longest spawning migration all anguillid eels, distance 5000 10,000 km across Atlantic Ocean Sargasso Sea. However, despite passage almost 100 years Johannes Schmidt proposed Sea as breeding place eels on basis larval surveys, no...
ABSTRACT The life cycle of the European eel ( Anguilla anguilla ) is inherently risky because it relies on successful migration larvae and adults across thousands kilometres Atlantic Ocean. In between these migrations, eels need to grow develop maximise their potential for reproduction. Eels have a number life‐history characteristics at each stage that minimise mortality, starvation predation risks opportunities growth. larval silver phases, select specific habitats adopt efficient swimming...
The behavior of sham-operated and anosmic Atlantic salmon, Salmo salar, was studied in a fjord system with close reference to the fine-scale hydrographic features. Control fish made small-amplitude vertical movements, sudden large-amplitude excursions. large continuous searches up down water column, descended below sill depth fjord, followed bottom contours. None these three behaviors seen control fish. trauma caused by surgical incision did not prevent from active swimming, unilateral...
It has been known for about a century that European eels have unique life history includes offshore spawning in the Sargasso Sea 5000–7000 km away from their juvenile and adult habitats Europe northern Africa. Recently hatched eel larvae were historically collected during Danish, German American surveys specific areas southern Sea. During 31 day period of March April 2014, Danish research ships sampled along 15 alternating transects stations across The collection recently (≤12 mm) 70° W...
Abstract The migration route and the spawning site of European eel Anguilla anguilla are still uncertain. It has been suggested that Mediterranean stock does not contribute to because there is no evidence eels leaving Sea. To test this hypothesis, we equipped eight female silver from south France with pop-up satellite tags during escapement coastal waters. Once in deeper water, quickly established diel vertical (DVM) between upper lower mesopelagic zone. Five tagged were taken by predators...
Abstract Coded acoustic tags and an array with moored receivers were used to study the effect of a sub‐sea AC power cable on migrating European eel, Anguilla anguilla (L.) in Baltic Sea. Sixty eels tagged migration speed was measured strait 130 kV cable. Observed swimming over ground corrected for advection by water current. Eel significantly lower around than both north south No details behaviour during passage possible physiological mechanisms explaining phenomenon are unknown. Further...
MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 496:145-157 (2014) - DOI: https://doi.org/10.3354/meps10646 Theme Section: Tracking fitness in marine vertebrates Behaviour of stocked and naturally recruited European eels during migration Håkan Westerberg1,*, Niklas Sjöberg1,2, Ingvar Lagenfelt3, Kim Aarestrup4, David Righton5 1Swedish University...
Effects of implanting data-storage tags in European eel, Anguilla anguilla, and the suitability different suture materials (braided permanent silk, monofilament, absorbable antibacterial) were examined. The consisted an electronic unit three floats on a wire, making them flexible able to follow swimming movements eel. No mortality occurred, tagged fish did not differ from control growth. Sutures shed or dissolved slowly. After 4 weeks, there was no difference among groups proportion sutures...
Abstract Acoustic harassment devices (AHDs) were deployed at salmon-trap nets in the Baltic Sea to reduce gear and catch damage by grey seals (Halichoerus grypus). The AHDs emitted pulses of 250–500-ms duration, worked a frequency 15 kHz, source level 179 dB re 1 μPa rms m. during three consecutive fishing seasons. Catches significantly higher traps with (25.5 kg d−1) than controls (12.0 d−1), was less (3.5 vs. 6.7 d−1). These results persisted over between seasons, but late season catches...
Abstract The abundance and distribution of leptocephalus larvae the European eel ( Anguilla anguilla, Anguillidae) were examined using ten historic recent Sargasso Sea expeditions that selected on basis having largest number sampling stations highest catches. surveys cover period 1920–2014. Station data recalculated to same unit larval density per area, irregular station positions transformed a regular spatial grid allow calculation comparable measures youngest (0+) cohort. result is mean...
Abstract Westerberg, H., Lagenfelt, I., and Svedäng, H. 2007. Silver eel migration behaviour in the Baltic. – ICES Journal of Marine Science, 64: 1457–1462 Female silver eels (Anguilla anguilla L.) were tagged with data storage tags released Baltic Sea at same time a single site on east coast Sweden. Data temperature, light, depth obtained from six eels, continuous records for 71 d sea. The swimming was similar all fish, almost stereotyped: activity between dusk dawn, starting light level...
Abstract One hypothesis to explain the large decline in recruitment of E uropean eel ( Anguilla anguilla ) from 1980s onwards is that a change ocean circulation has influenced drift larvae, resulting lower recruitment. To test this hypothesis, simple L agrangian model was constructed simulate passive spawning area S argasso ea shelf. The simulation utilised velocity data reanalysis climate, imple O cean D ata A ssimilation SODA 2.1.6), for period 1958–2008 covering time regime shift average...
Despite some recent progress, there are still large gaps of knowledge about migration routes and behaviour European eels, Anguilla anguilla, during their long-distance oceanic migration. To achieve a better understanding the behaviour, 28 female silver eels were equipped with pop-up satellite transmitters released at three different locations in north-eastern Atlantic Ocean Sargasso Sea. The study covers tracking periods between 7 92 days. distance release point estimated position ranged...
Four methods for attaching pop-up satellite transmitters to European eel were tested in the laboratory by recording long-term tag retention, growth and survival; short-term behavioral responses; physical damage from attachments. All eels survived until they lost their tag, or end of six-month study. Specific rate did not differ between tagged fish controls. Tag retention varied 0% 100% among attachment methods. A tagging method that uses strength skin at three points is recommended ocean...
Abstract A new design for a salmon trap aimed at minimizing damage to catch and gear caused by grey seals was tested. The traditional used in the northern Baltic permits an efficient hunting strategy seals, whereby chased fish entangle themselves side panels can then easily be taken, with associated net. of test (excluding chamber) are made large-mesh (400 mm) netting compared ≤200 mm traps. This should allow seal-chased panicking pass through, while less stressed individuals still guided...
Abstract Overwintering dormancy behaviour was studied in female silver eels Lake Mälaren Sweden between 2008 and 2010. Depth choices movements relation to temperature were analysed from pressure records for 13 with implanted data storage tags, covering 17 overwintering periods three intervening summer periods. Dormancy commenced October–November as temperatures fell below 4–12 °C. Eels tended remain motionless throughout the winter, some short of activity signalled by small changes depth...