A5050392765- Marine and fisheries research
- Fish Ecology and Management Studies
- Marine Bivalve and Aquaculture Studies
- Aquaculture Nutrition and Growth
- Crustacean biology and ecology
- Isotope Analysis in Ecology
- Coral and Marine Ecosystems Studies
- Physiological and biochemical adaptations
- Oceanographic and Atmospheric Processes
- Marine and coastal ecosystems
- Coastal and Marine Management
- Fish Biology and Ecology Studies
- Coastal wetland ecosystem dynamics
- Animal Behavior and Reproduction
- Tropical and Extratropical Cyclones Research
- Aquatic Invertebrate Ecology and Behavior
- Marine Biology and Ecology Research
- Arctic and Antarctic ice dynamics
- Animal Nutrition and Physiology
- Mathematical and Theoretical Epidemiology and Ecology Models
- Marine and coastal plant biology
- Reproductive biology and impacts on aquatic species
- Radiation Therapy and Dosimetry
- Food Industry and Aquatic Biology
- Invertebrate Taxonomy and Ecology
Universität Hamburg
2015-2024
Hamburg Institut (Germany)
2007-2021
Johann Heinrich von Thünen-Institut
2012-2020
Institute of Hydrobiology, Biology Centre, Academy of Sciences of the Czech Republic
2018
Coastal Impact
2007-2014
Institute for Applied Soil Biology
2010
Centre for Environment, Fisheries and Aquaculture Science
2007
Joint Research Centre
2007
MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 468:57-69 (2012) - DOI: https://doi.org/10.3354/meps09984 snow, zooplankton and thin layers: indications of a trophic link from small-scale sampling with Video Plankton Recorder Klas O. Möller1,*, Michael St. John2,1, Axel Temming1, Jens Floeter1, Anne F. Sell3, Jens-Peter Herrmann1, Christian Möllmann1...
A 24 h trawl fishery was conducted near the island of Sylt, northern Wadden Sea, Germany, to investigate and compare daily patterns activity feeding among gobies Pomatoschistus microps Krayer P. minutus Pallas brown shrimp Crangon crangon L. Relative occurrence 3 species generally consistent, with C. dominating at about 93 %, except midnight, when occurred 68 % 12 respectively.Peak abundances dawn mjcrops sunrise, coinciding rising tide.Size distributions for were constant on a diurnal...
Recruitment patterns of Baltic Sea sprat (Sprattus sprattus) were correlated to time series (i) month- and depth-specific temperature conditions (ii) larval drift inferred from long-term Lagrangian particle simulations. From the latter, we derived an index that likely reflected variable degree annual transport central, deep spawning basins shallow coastal areas Sea. The was significantly (P < 0.001) recruitment success explained, together with stock biomass, 82% overall variability...
The Eastern Baltic cod abundance started rapidly to increase in the mid-2000s as evidenced by analytical stock assessments, due increased recruitment and declining fishing mortality. Since 2014, assessment is not available, leaving present status unclear casting doubts about magnitude of recent recruitment. Earlier studies identified main factors impacting on reproductive success be related loss two out three spawning areas 1980s caused lack major inflows with a concurrent reduction salinity...
Abstract Practical and applied knowledge of local fishers can help to improve our understanding target species ecology fisheries management decisions. In the Western Baltic Sea (WBS), spatio-temporal distribution cod is still largely unknown despite decades research. We studied changes in by obtaining information on temporal depth habitat use from commercial gillnet using semi-directed interviews supplemented at-sea observer data. Linear non-linear regression analyses revealed significant...
The nature and significance of size preference for fish prey in the diet selection North Sea cod (Gadus morhua L.) was analysed. analysis combined information on size-specific abundance derived from bottom trawl surveys with frequencies stomachs International Stomach Database. To estimate all potential sea, a length-based number spectrum calculated, corrected gear efficiency by application species-specific correction factor, weighted local predator to take spatialtemporal overlap between...
The brown shrimp C. crangon supports a large commercial fishery in British, Belgian, Dutch, German and Danish waters. It produces eggs throughout the year with two seasonal peaks summer winter, respectively. Uncertainty exists regard to relative importance of egg production seasons for mass invasion juvenile recruits 10–20 mm length May/June, which is dominant signal Dutch Wadden Sea, presumed grow into exploitable stock by autumn, causing typical rise catches at that time year. A simulation...
This model allows for various curve shapes, including linear (B=0) and exponential (B=1), the shape (B) was estimated from data. Meal size included in by modifying constant R=R′ × MD, with M=meal weight D=constant. When meal model, resulting B values were strongly dependent on food type D negatively correlated B: capelin, B=1.37, D= −1.16; herring, B=0.84, −0.57; prawn, B=0.35, −0.14. excluded closer together (capelin, 0.47: 0.43; 0.27), loses explained variance, however, small 4% 1%: <1%).
Abstract Otolith microstructure analysis and hydrodynamic modelling were combined to study growth patterns in young‐of‐the‐year (YoY) sprat, Sprattus sprattus , which sampled October 2002 the central Baltic Sea. The observed ‘window of survival’, approximated by distribution back‐calculated days first feeding (DFF), was narrow compared extended spawning season sprat Sea (mean± SD = 22 June ± 14.1 days) indicated that only individuals born summer survived until 2002. Within group survivors,...
Impacts of climate change on marine ecosystems have become increasingly apparent during the past decades. In consequence, it is necessary to study how these alterations can affect habitat and population dynamics key organisms. Here we used a video plankton recorder (VPR) investigate effect climate-induced changes copepod Pseudocalanus acuspes, species in Baltic Sea. The VPR allowed observation reproducing females, identified by attached egg sacs, usually lost traditional net sampling. We...
Abstract Designing effective management plans requires understanding fishers' behaviour under that plan, because fishers change their in response to economic and incentives, which turn will lead different fishery outcomes. This study presents a modelling framework for strategy evaluations takes into account the of schemes. Based on upcoming discard ban, two prevention strategies were tested North Sea saithe fishery, where fleet segments have either no or generally low quota cod. Costs...
Abstract The North Sea brown shrimp fishery is currently regulated neither with quotas nor effort management. current paradigm of non-management was based on an analysis the total predation by cod and whiting in relation to commercial catches for period 1970–1995 estimated dominance natural mortality. However, since this period, ecosystem has undergone pronounced changes overfishing climate change causing a substantial decline predator stocks, namely whiting. In addition, both predators have...
Abstract This study presents the diet composition of western Baltic cod Gadus morhua based on 3150 stomachs sampled year‐round between 2016 and 2017 using angling, gillnetting bottom trawling, which enhanced spatio‐temporal coverage habitats. Cod in shallow areas (<20 m depth) was dominated by benthic invertebrate species, mainly common shore crab Carcinus maneas . Compared to historic data from 1960s 1980s (limited depth >20 m), contribution herring Clupea harengus decreased round...
The predation of haddock Melanogrammus aeglefinus and whiting Merlangius merlangus on sandeel Ammodytes marinus was investigated based intensive sampling [performed with a bottom trawl (GOV) equipped small meshed codend cover; sediment samples were taken van Veen grab] in restricted area c . 15 × 20 nautical miles the northern North Sea during 5 day period July 1996. analysis spatial distribution predators revealed pronounced aggregation south‐west part area, where catches also highest. 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 317:225-236 (2006) - doi:10.3354/meps317225 Temperature-induced regional and temporal growth differences in Baltic young-of-the-year sprat Sprattus sprattus Hannes Baumann1,*, Tomas Gröhsler2, Georgs Kornilovs3, Andrej Makarchouk3, Valerie Feldmann4, Axel Temming1 1Institute of Hydrobiology Fisheries Science,...