A5079006261- Marine and fisheries research
- Fish Ecology and Management Studies
- Fish Biology and Ecology Studies
- Marine Bivalve and Aquaculture Studies
- Coral and Marine Ecosystems Studies
- Isotope Analysis in Ecology
- Aquaculture Nutrition and Growth
- Genetic and phenotypic traits in livestock
- Ancient Near East History
- Effects and risks of endocrine disrupting chemicals
- Archaeology and Historical Studies
- Avian ecology and behavior
- Ancient Egypt and Archaeology
- Environmental Science and Water Management
- Spectroscopy and Chemometric Analyses
- Toxic Organic Pollutants Impact
- Fish biology, ecology, and behavior
- Identification and Quantification in Food
- Environmental Toxicology and Ecotoxicology
- Microplastics and Plastic Pollution
- Recycling and Waste Management Techniques
- Marine Biology and Environmental Chemistry
- Food Industry and Aquatic Biology
National Marine Fisheries Research Institute
2015-2024
Abstract Marine recreational fishing ( MRF ) is a high‐participation activity with large economic value and social benefits globally, it impacts on some fish stocks. Although reporting catches European Union legislative requirement, estimates are only available for countries. Here, data numbers of fishers, participation rates, days fished, expenditures, two widely targeted species were synthesized to provide placed in the global context. Uncertainty assessment was not possible due incomplete...
Abstract The eastern Baltic (EB) cod (Gadus morhua) stock was depleted and overexploited for decades until the mid-2000s, when fishing mortality rapidly declined biomass started to increase, as shown by assessments. These positive developments were partly assigned effective management measures, EB considered one of most successful recoveries in recent times. In contrast this optimistic view, analytical assessment failed 2014, leaving present status unclear. Deteriorated quality some basic...
Abstract Ferter, K., Weltersbach, M. S., Strehlow, H. V., Vølstad, J. H., Alós, J., Arlinghaus, R., Armstrong, M., Dorow, de Graaf, van der Hammen, T., Hyder, Levrel, Paulrud, A., Radtke, Rocklin, D., Sparrevohn, C. and Veiga, P. 2013. Unexpectedly high catch-and-release rates in European marine recreational fisheries: implications for science management. – ICES Journal of Marine Science, 70: 1319–1329. While (C&R) is a well-known practice several freshwater fisheries, studies on the...
Marine spatial planning (MSP) is considered a valuable tool in the ecosystem-based management of marine areas. Predictive modelling may be applied MSP framework to obtain spatially explicit information about biodiversity patterns. The growing number statistical approaches used for this purpose implies urgent need comparisons between different predictive techniques. In study, we evaluated performance selected machine learning and regression-based methods that were fish community indices. We...
Abstract Fish otoliths' chronometric properties make them useful for age and growth rate estimation in fisheries management. For the Eastern Baltic Sea cod stock ( Gadus morhua ), unclear seasonal zones otoliths have resulted unreliable information. Here, a new method based on patterns trace elemental otolith incorporation was tested first time compared with traditional of visually counting zones, using from North seas. Various ratios, linked to fish metabolic activity (higher summer) or...
Abstract Over the recent decades, International Council for Exploration of Sea (ICES) has set guidelines best practise quality control age estimation procedures. The applicability these is assessed by reviewing ageing issues eastern Baltic cod (EBC) as a case study. Since implementation an age-based assessment EBC in beginning 1970s, been hampered composition data, years to degree that no longer used. reason reading problems low visual contrast between growth zones otoliths which seems be...
The Eastern Baltic cod (Gadus morhua) stock is currently in a very poor state, with low biomass and adverse trends several life history demographic parameters. This raises concern over whether to what level recovery possible. Here, we look for new insights from historical perspective, extending the time series of various health indicators back 1940s, i.e. beginning intensive exploitation cod. data confirm that deterioration recent years unprecedented, as all are presently their worst states...
Abstract Smartphone applications (apps) that target recreational fishers are growing in abundance. These apps have the potential to provide data useful for management of fisheries. We surveyed expert opinion 20, mostly European, countries assess current and future status app use marine The survey revealed a few already support existing collection, this number is likely increase within 5–10 years. strongest barriers were scarcity concern over quality, especially biases due opt-in nature use....
Abstract Long time series of reliable individual growth estimates are crucial for understanding the status a fish stock and deciding upon appropriate management. Tagging data provide valuable information about growth, especially useful when age‐based assessments compromised by age‐determination uncertainties. However, in literature there is lack studies assessing possible changes over using tagging data. Here, from experiments performed Baltic Sea between 1971 2019 were added to those...
Chronological records of elemental concentrations in fish otoliths are a widely used tool to infer the environmental conditions experienced by individual fish. To interpret signals within otolith, it is important understand how both external and internal factors impact ion uptake, transport incorporation. In this study, we have combined chronological from archival data storage tags quantify influence (sex, size, age, growth) (temperature, depth, salinity) on otolith chemistry cod ( Gadus...
Accurate age data are essential for reliable fish stock assessment. Yet many stocks suffer from inconsistencies in interpretation. A new approach to obtain makes use of the chemical composition otoliths. This study validates periodicity recurrent patterns 25 Mg, 31 P, 34 K, 55 Mn, 63 Cu, 64 Zn, 66 85 Rb, 88 Sr, 138 Ba, and 208 Pb Baltic cod (Gadus morhua) otoliths tag–recapture known-age samples. Otolith P concentrations showed highest consistency seasonality over years, with minima...
Recent environmental changes have influenced the ecology and biology of eastern Baltic cod. Declining somatic condition, maturation at smaller size restricted distribution population suggest that growth rates decreased between early 2000s 2010s. Extensive age estimation problems until now precluded testing this hypothesis. This study presents evidence for a decrease in rate Temporal patterns growth, condition were analysed based on two complementary analyses: length frequency mode...
Abstract The use of growth estimation methods that depend on unreliable age data has previously hindered the quantification perceived differences in rates between two cod stocks inhabiting Baltic Sea. Data from tagged different regions Sea during 2007–2019 were combined, and general linear models fit to investigate inter-regional (defined as area release) inter-stock (assigned a subset recaptures using genetic otolith shape analyses) individual growth. An average-sized (364 mm) caught...
Knowledge of the movement patterns and area utilisation commercially important fish stocks is critical to management. The Eastern Baltic cod Gadus morhua , one most ecologically in Sea, currently severely impacted Europe. During last 2 decades, this stock has experienced drastic decreases population size, distributional range, individual growth body condition, all which may have affected movements between different areas Sea. In study, we investigated seasonal by re-analysing historical...
Abstract Big changes occurred in the Eastern Baltic cod biomass and catches 1976–1997 period. At present, stock spawning (SSB) are approximately five times lower than their highest ever recorded levels observed middle of 1980s. The reasons for decline, namely low recruitment high fishing mortality, widely known well described literature. Throughout whole period, International Council Exploration Sea (ICES) made scientific recommendations regarding exploitation level stock. ICES presented...
Simulation of fisheries systems is a widely used approach that integrates monitoring and assessment tools. We applied the ALADYM (age-length based dynamic model) simulation model to three different studies aimed at investigating correlations between pressure population metrics, exploring viability mortality levels in long-term scenarios predicting effects combined management measures. Uncertainty was incorporated into simulations following Monte Carlo paradigm. Three stocks were for these...
Baltic cod, like other species, is susceptible to inter-annual fluctuations in sexual maturation, depending on the length, age, sex, extent of habitat area, and stock abundance cod population. Maturity one biological indicators used detect changes a that can be caused by fishing. To address these issues specifically for eastern stock, long-term data (1990–2006) from Polish research vessels southern were examined. date, ICES has same maturity ogives over extended periods assumed invariant sex...
Abstract An aggregated sample of 925 Atlantic cod Gadus morhua collected by four countries in different regions the Baltic Sea during seasons were measured (total length, L T = 161–890 mm and weighed (mass, M 45–6900 g) both before freezing after defrosting. The found to decrease significantly following death frozen storage. There was an average (±SD) change −2.91% (±0.05%) freezing, independent starting . Total changed −2.65% (±0.14%), mass. Shrinkage did not differ between 1 4 months...