31 results on '"Kaljuste, Olavi"'
Search Results
2. Benchmark Workshop on Baltic Pelagic stocks (WKBBALTPEL)
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Nord, Mikaela Bergenius, Cardinale, Massimiliano, Davies, Julie Olivia Coad, Golovaneva, Maria, Goñi, Nicolas, Gutkowska, Julita, Haase, Stefanie, Hansell, Alex, Hommik, Kristiina, Horbowy, Jan, Kaljuste, Olavi, Masnadi, Francesco, Pierce, Maria, Pönni, Jukka, Prista, Nuno, Putnis, Ivars, Quesada, Eros, Raid, Tiit, Ringdahl, Katja, Skog, Malin, Smolinski, Szymon, Storr-Paulsen, Marie, Tomczak, Maciej, Trijoulet, Vanessa, Vinther, Morten, Nord, Mikaela Bergenius, Cardinale, Massimiliano, Davies, Julie Olivia Coad, Golovaneva, Maria, Goñi, Nicolas, Gutkowska, Julita, Haase, Stefanie, Hansell, Alex, Hommik, Kristiina, Horbowy, Jan, Kaljuste, Olavi, Masnadi, Francesco, Pierce, Maria, Pönni, Jukka, Prista, Nuno, Putnis, Ivars, Quesada, Eros, Raid, Tiit, Ringdahl, Katja, Skog, Malin, Smolinski, Szymon, Storr-Paulsen, Marie, Tomczak, Maciej, Trijoulet, Vanessa, and Vinther, Morten
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Three pelagic stocks in the Baltic Sea, Central Baltic Herring (CBH; her.27.25-2932), Sprat (spr.27.22-32) and Gulf of Riga Herring (GOR, her 27.28) were examined during this benchmark. Work was prepared well in advance and 3 preparatory online meetings took place between the Data Evaluation Workshop and the actual benchmark to follow up progress. The benchmark meeting advanced really well until reference points were discussed. There were follow up online meetings on 3rd and 13th March to further discuss, and agree, on reference points for the three stocks. All three stocks that was benchmarked were previously assessed with XSA, and hence a main point with the benchmark was to change the assessment model. Two of the stocks changed to SAM (GOR and sprat) whereas the CBH changed to stock synthesis (SS3). For the GOR and sprat the reference points were estimated following the ICES procedure using EQSIM. For the CBH the reference points were obtained using a Management strategy evaluations (MSE), a method previously used for one of the Northern shrimps stocks in ICES (pra.27.3a4a). There was an extensive issue list for the CBH and although not all of the issues were addressed, significant progress was made. Additional survey indices, maturity at age, weight in catch, adding age reading error, landings corrected for misreporting (Danish landings only) were all investigated and updated time series were included in the new assessment. SS3 was chosen as main assessment method and there was extensive model development work carried out in advance and presented at the meeting. An ensemble model was developed to incorporate uncertainty in natural mortality. Three scenarios of natural mortalities were developed from rescaling the natural mortalities from a multispecies model for the Baltic (SMS) with life history parameters. An objective weighing approach was used based on model performance statistics diagnostics to develop the final assessment.
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- 2023
3. Lack of panmixia of Bothnian Bay vendace - Implications for fisheries management
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López, María-Eugenia, primary, Bergenius Nord, Mikaela, additional, Kaljuste, Olavi, additional, Wennerström, Lovisa, additional, Hekim, Zeynep, additional, Tiainen, Joni, additional, and Vasemägi, Anti, additional
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- 2022
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4. Principal developments in the structure and dynamics of main fish stocks in the northeastern Baltic in the 1990s within the context of environmental changes
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Raid, Tiit, Järvik, Ahto, Kaljuste, Olavi, Lankov, Ain, and Drevs, Tenno
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Fisheries and aquaculture ,Baltic Sea (ICES Ecoregion) - Abstract
The mean weight-at-age of herring and sprat has shown a decreasing trend, following a decrease in the marine component of the zooplankton during an extended period of absence of large inflows to the Baltic Sea. Simultaneously, the open-sea herring stocks have decreased in abundance, while some gulf stocks of herring and sprat stock have increased. The changes observed have had an effect not only on relationships within the ecosystem, but also on the assessment and exploitation of fish stocks in the Baltic Sea.Article from Marine Science Symposia Vol. 219 - "Hydrobiological variability in the ICES Area, 1990-1999", symposium held in Edinburgh, 8-10 August 2001. To access the remaining articles please click on the keyword "MSS Vol. 219".
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- 2023
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5. Increases of opportunistic species in response to ecosystem change: the case of the Baltic Sea three-spined stickleback
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Olin, Agnes B, primary, Olsson, Jens, additional, Eklöf, Johan S, additional, Eriksson, Britas Klemens, additional, Kaljuste, Olavi, additional, Briekmane, Laura, additional, and Bergström, Ulf, additional
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- 2022
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6. Increases of opportunistic species in response to ecosystem change : the case of the Baltic Sea three-spined stickleback
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Olin, Agnes B., Olsson, Jens, Eklöf, Johan S., Eriksson, Britas Klemens, Kaljuste, Olavi, Briekmane, Laura, Bergström, Ulf, Olin, Agnes B., Olsson, Jens, Eklöf, Johan S., Eriksson, Britas Klemens, Kaljuste, Olavi, Briekmane, Laura, and Bergström, Ulf
- Abstract
Under rapid environmental change, opportunistic species may exhibit dramatic increases in response to the altered conditions, and can in turn have large impacts on the ecosystem. One such species is the three-spined stickleback (Gasterosteus aculeatus), which has shown substantial increases in several aquatic systems in recent decades. Here, we review the population development of the stickleback in the Baltic Sea, a large brackish water ecosystem subject to rapid environmental change. Current evidence points to predatory release being the central driver of the population increases observed in some areas, while both eutrophication and climate change have likely contributed to creating more favourable conditions for the stickleback. The increasing stickleback densities have had profound effects on coastal ecosystem function by impairing the recruitment of piscivorous fish and enhancing the effects of eutrophication through promoting the production of filamentous algae. The increase poses a challenge for both environmental management and fisheries, where a substantial interest from the pelagic fisheries fleet in exploiting the species calls for urgent attention. While significant knowledge gaps remain, we suggest that the case of the Baltic Sea stickleback increase provides generalisable lessons of value for understanding and managing other coastal ecosystems under rapid change.
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- 2022
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7. Fisk- och skaldjursbestånd i hav och sötvatten 2021 : Resursöversikt
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Sundelöf, Andreas, Florin, Ann-Britt, Rogell, Björn, Bolund, Elisabeth, Sca Vitale, France, Sundblad, Göran, Strömberg, Helena, Ahlbeck Bergendahl, Ida, Sundin, Josefin, Lundström, Karl, Wikström, Karolina, Magnusson, Katarina, Fetterplace, Lachlan, Wennerström, Lovisa, Ogonowski, Martin, Bergenius Nord, Mikaela, Holmgren, Noél, Kaljuste, Olavi, Bohman, Patrik, Fredriksson, Ronny, Eiler, Stefan, Larsson, Stefan, Axenrot, Thomas, Östman, Örjan, Sundelöf, Andreas, Florin, Ann-Britt, Rogell, Björn, Bolund, Elisabeth, Sca Vitale, France, Sundblad, Göran, Strömberg, Helena, Ahlbeck Bergendahl, Ida, Sundin, Josefin, Lundström, Karl, Wikström, Karolina, Magnusson, Katarina, Fetterplace, Lachlan, Wennerström, Lovisa, Ogonowski, Martin, Bergenius Nord, Mikaela, Holmgren, Noél, Kaljuste, Olavi, Bohman, Patrik, Fredriksson, Ronny, Eiler, Stefan, Larsson, Stefan, Axenrot, Thomas, and Östman, Örjan
- Abstract
I rapporten kan du ta del av bedömningen som görs av situationen för bestånd som regleras inom ramen för EU:s gemensamma fiskeripolitik (GFP). Bedömningarna baseras på det forskningssamarbete och den rådgivning som sker inom det Internationella Havsforskningsrådet (ICES). Sammantaget redovisas tillståndet för 107 bestånd av 48 fisk- och skaldjursarter. De bestånd som förvaltas nationellt baseras på de biologiska underlagen, och rådgivningen i huvudsak på den forskning och övervakning samt analys som bedrivs av Institutionen för akvatiska resurser vid Sveriges lantbruksuniversitet (SLU Aqua) samt yrkesfiskets rapportering. Rapporten är en beställning från Havs- och vattenmyndigheten (HaV) till Sveriges lantbruksuniversitet (SLU) och utgör ett viktigt kunskapsunderlag till myndighetens arbete. Den uppfyller de krav som finns inom EU:s gemensamma fiskeripolitik om att basera förvaltningen på bästa tillgängliga vetenskap. Denna rapport är också ett stöd till det arbete som beskrivs närmare i strategin för framtidens fiske och tillhörande handlingsplaner för vattenbruk, yrkes- och fritidsfiske som HaV och Jordbruksverket har tagit fram i dialog med fiskets och vattenbrukets intressenter.
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- 2022
8. Lack of panmixia of Bothnian Bay vendace-Implications for fisheries management
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López, Maria-Eugenia, Bergenius Nord, Mikaela, Kaljuste, Olavi, Wennerström, Lovisa, Hekim, Zeynep, Tiainen, Joni, and Vasemägi, Anti
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Ecology ,Fish and Aquacultural Science - Abstract
Overexploitation of fisheries is recognized as a major environmental and socioeconomic problem that threats biodiversity and ecosystem functioning. Inappropriate management policies of fish stocks have been applied as a consequence of inadequate characterization of subtle genetic structure in many fish species. In this study, we aim to assess the extent of genetic differentiation and structure of vendace (Coregonus albula) collected from eight locations in the Bothnian Bay, the northernmost part of the Baltic Sea. Specifically, we test if this species forms a single panmictic population or is divided into several genetically distinct units. We used restriction site-associated DNA sequencing (RAD-seq) to identify 21,792 SNPs based on 266 individuals. We identified a clear pattern of genetic differentiation between River Kalix and the other sampling locations, and a weak structuring between samples from Swedish and Finnish coast. Outlier analysis detected 41 SNPs putatively under divergent selection, mainly reflecting the divergence between River Kalix and the other samples. The outlier SNPs were located within or near 25 genes, including voltage-dependent calcium channel subunit alpha-2 (CACNA2D2), cadherin 26 (CDH26) and carbonic anhydrase 4-like (CA4) that have earlier been associated with salt-tolerance and salinity stress. Our study provides the first genome-wide perspective on genetic structuring of Baltic Sea vendace and rejects the hypothesis of panmixia in the Bothnian Bay. As such, our work demonstrates the power of RAD-sequencing to detect low but significant genetic structuring relevant for fisheries management.
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- 2022
9. Fisk- och skaldjursbestånd i hav och sötvatten 2020 : Resursöversikt
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Bryhn, Andreas, Sundelöf, Andreas, Florin, Ann-Britt, Lymer, David, Jones, Douglas, Petersson, Erik, Vitale, Francesca, Sundblad, Göran, Strömberg, Helena, Wickström, Håkan, Lövgren, Johan, Persson, John, Sundin, Josefin, Lundström, Karl, Fetterplace, Lachlan, Edsman, Lennart, Wennerström, Lovisa, Ogonowski, Martin, Cardinale, Massimiliano, Ulmestrand, Mats, Bergenius, Mikaela, Sjoberg, Niklas, Renman, Ola, Kaljuste, Olavi, Bohman, Patrik, Fredriksson, Ronny, Eiler, Stefan, Axenrot, Thomas, and Dekker, Willem
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kräfta ,Fisk- och akvakulturforskning ,fisk ,hållbarhet ,ekosystemtjänster ,Miljövetenskap ,kust ,hav ,bestånd ,skaldjur ,Fish and Aquacultural Science ,fritidsfiske ,fångstmetod ,provfiskemetod ,Environmental Sciences - Abstract
I rapporten kan du ta del av bedömningen som görs av situationen för bestånd som regleras inom ramen för EU:s gemensamma fiskeripolitik (GFP). Bedömningarna baseras på det forskningssamarbete och den rådgivning som sker inom det Internationella Havsforskningsrådet (ICES). Totalt redovisas underlag och råd för 48 fisk- och skaldjursarter. De bestånd som förvaltas nationellt baseras på de biologiska underlagen, och rådgivningen i huvudsak på den forskning och övervakning samt analys som bedrivs av Institutionen för akvatiska resurser vid Sveriges lantbruksuniversitet (SLU Aqua) samt yrkesfiskets rapportering.
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- 2021
10. Baltic Fisheries Assessment Working Group (WGBFAS)
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Amosova, Viktoria, Willestofte Berg, Casper, Boje, Jesper, Brown, Elliott John, Cardinale, Massimiliano, Carlshamre, Sofia, Eero, Margit, Gilljam, David, Gröhsler, Tomas, Gutkowska, Julita, Haase, Stefanie, Hommik, Kristiina, Horbowy, Jan, Hüssy, Karin, Jounela, Pekka, Kaljuste, Olavi, Karpushevskaia, Anastasiia, Krumme, Uwe, Mirny, Zuzanna, Neuenfeldt, Stefan, Nielsen, Anders, Orio, Alessandro, Plikshs, Maris, Pönni, Jukka, Putnis, Ivars, Raid, Tiit, Raitaniemi, Jari, Receveur, Aurore, Smolinski, Szymon, Stötera, Sven, Storr-Paulsen, Marie, Trufanova, Inna, Ustups, Didzis, Vitale, Francesca, and Zolubas, Tomas
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Fish and Aquacultural Science - Published
- 2021
11. Benchmark workshop on herring (Clupea harengus) in the Gulf of Bothnia (WKCLuB 2021)
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Cardinale, Massimiliano, Cerviño, Santiago, Gilljam, David, Hekim, Zeynep, Holmgren, Noél, Ianelli, Jim, Jounela, Pekka, Kaljuste, Olavi, Lilja, Juha, Lövgren, Johan, Orio, Alessandro, Pönni, Jukka, Pakarinen, Tapani, and Raitaniemi, Jari
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Fish and Aquacultural Science - Abstract
The assessment for the Gulf of Bothnia herring (SD 3031) in 2019 was not accepted by the Advice Drafting Group and was changed from category 1 to 3. The assessment was not accepted based on the poor retrospective diagnostics where the Mohn’s rho values were above 20% for SSB, F and recruitment. The aim for the Benchmark was to evaluate a new model, Stock Synthesis (SS3) as a candidate for the assessment of Gulf of Bothnia Herring SD30–31 in order to minimize the retrospective pattern previously observed. Following the path of the Benchmark data related issues were revealed. This led to a situation that the benchmark was prolonged one year in order to correct the data related issues. Apart from a misspecification in the model about how the trapnet index was used (abundance index vs. biomass index), the data problem had been related to the acoustic survey. The acoustic survey index used in the assessment was thoroughly examined by the Baltic international fish survey working group (WGBIFS) in a meeting in December 2020. A number of model runs (six prior to meeting, and an additional 16 during the benchmark) were conducted for evaluation at this benchmark. The analysis presented extensive diagnostic tests including the standard ICES criterion related to retrospective patterns. This was considered an enhancement over using one method for accepting or rejecting an assessment. It was noted that the final retrospective pattern had low and acceptable values of Mohn’s rho. In general, the benchmark using the stock synthesis platform with the settings specified during the benchmark are considered acceptable for assessment and advice and have features that should ensure stability as new data are added (e.g. selectivity is assumed to be constant over time).
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- 2021
12. Baltic Fisheries Assessment Working Group (WGBFAS)
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Amosova, Viktoriia, Bergenius, Mikaela, Boje, Jesper, Brown, Elliot John, Carlshamre, Sofia, Eero, Margit, Gröhsler, Tomas, Gutkowska, Julita, Haase, Stefanie, Hjelm, Joakim, Holmgren, Noel, Hommik, Kristiina, Horbowy, Jan, Jounela, Pekka, Kaljuste, Olavi, Karpushevskaia, Anastasiia, Krumme, Uwe, Lövgren, Johan, Mirny, Zuzanna, Neuenfeldt, Stefan, Nielsen, Anders, Pekcan-Hekim, Zeynep, Plikshs, Maris, Putnis, Ivars, Pönni, Jukka, Raid, Tiit, Raitaniemi, Jari, Schade, Franziska, Stoetera, Sven, Storr-Paulsen, Marie, Strehlow, Harry, Ustups, Didzis, and Zolubas, Tomas
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- 2020
13. Towards better Understanding of Successful Management of the Gulf of Riga Herring Stock
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Raid, Tiit and Kaljuste, Olavi
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- 2006
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14. Managing the spatial and temporal pattern of Baltic herring trawl fishery
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Raid, Tiit, primary, Järv, Leili, additional, Hallang, Andrus, additional, Shpilev, Heli, additional, Kaljuste, Olavi, additional, and Järvik, A, additional
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- 2013
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15. Recruitment failure of coastal predatory fish in the Baltic Sea coincident with an offshore ecosystem regime shift
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Ljunggren, Lars, Sandström, Alfred, Bergström, Ulf, Mattila, Johanna, Lappalainen, Antti, Johansson, Gustav, Sundblad, Göran, Casini, Michele, Kaljuste, Olavi, and Eriksson, Britas Klemens
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- 2010
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16. ADDENDUM 2: SERIES OF ICES SURVEY PROTOCOLS, VERSION 1.02 SISP MANUAL OF INTERNATIONAL BALTIC ACOUSTIC SURVEYS (IBAS) International Council for the Exploration of the Sea Conseil International pour l'Exploration de la Mer
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Kaljuste, Olavi, Böttcher, Uwe, Degel, Henrik, Kasatkina, Svetlana, Laczkowski, Tomasz, Larson, Niklas, Lilja, Juha, Oeberst, Rainer, Marijus Spegys, and Fausts Svecovs
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- 2019
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17. Baltic Fisheries Assessemant Working Group (WGBFAS)
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Amosova, Viktoriia, Bergenius, Mikaela, Boje, Jesper, Carlshamre, Sofia, Eero, Margit, Fernandez, Ruth, Gröhsler, Tomas, Gutkowska, Julita, Hommik, Kristiina, Horbowy, Jan, Jounela, Pekka, Kaljuste, Olavi, Karpushevskiy, Igor, Klinger, Richard, Krumme, Uwe, Lövgren, Johan, Mirny, Zuzanna, Albertsen, Christoffer Moesgaard, Neuenfeldt, Stefan, Plikshs, Maris, Nielsen, Anders, Öhman, Kristin, Pekcan-Hekim, Zeynep, Pönni, Jukka, Putnis, Ivars, Raid, Tiit, Raitaniemi, Jari, Rodriguez-Tress, Paco, Statkus, Romas, Stoetera, Sven, Storr-Paulsen, Marie, Ulrich, Clara, Ustups, Didzis, and Zolubas, Tomas
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SDG 14 - Life Below Water - Abstract
The main objective of WGBFAS was to assess the status and produce a draft advice of the following stocks: • Sole in Division 3.a, SDs 20–24 • Cod in Kattegat, Cod in SDs 22–24, Cod in SDs 24–32 • Herring in SDs 25–27, 28.2, 29 and 32 • Herring in SD 28.1 (Gulf of Riga) • Herring in SDs 30-31 (Gulf of Bothnia) • Sprat in SDs 22–32 • Plaice in SDs 21–23, Plaice in SDs 24–32 • Flounder in SDs 22–23 (no catch advice) • Flounder in SDs 24–25 (no catch advice) The WG was not requested to assess the following stocks in 2019, as no advice was needed: • Flounder in SDs 26+28 • Flounder in SDs 27+29–32 • Brill in SDs 22–32 • Dab in SDs 22–32 • Turbot in SDs 22–32 It was, however, decided by the group to compile and update the input data for 2018 and thereby also conduct update assessments for these latest five stocks. In the introductory chapter of this report the WG, in agreement with the ToRs, considers and comments on the ecosystem and fisheries overviews, reviews the progress on benchmark processes, identifies the data needed for next year’s data call with some suggestions for improvements in the data call, and summarizes general and stock-specific research needs. The introduction further summarizes the work of other WGs relevant to the WGBFAS, and the assessment methods used. Finally, the introduction presents a brief overview of each stock and quite extensively discusses the ecosystem considerations of the Baltic Sea and ecosystem changes that have been analytically considered in the stock assessments. The results of the analytical stock assessment or survey trends for the species listed above are presented for all the stocks with the same species in the same sections. The analytical models used for the stock assessments were XSA, SAM and SS3. For most flatfish (data limited stocks), CPUE trends from bottom-trawl surveys were used in the assessment (except plaice in SDs 24–25 for which relative SSB from SAM was used). For cod in SDs 24–32, a full analytical assessment (using SS3) could be performed, after the compilation/benchmark work undertaken in 2018–2019. The report ends with references, annexes with the response to a special request, links to Stock Annexes, and list of Working Documents.
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- 2019
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18. The first large-scale assessment of three-spined stickleback (Gasterosteus aculeatus) biomass and spatial distribution in the Baltic Sea
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Olsson, Jens, Jakubaviciute, Egle, Kaljuste, Olavi, Larsson, Niklas, Bergström, Ulf, Casini, Michele, Cardinale, Massimiliano, Hjelm, Joakim, Byström, Pär, Olsson, Jens, Jakubaviciute, Egle, Kaljuste, Olavi, Larsson, Niklas, Bergström, Ulf, Casini, Michele, Cardinale, Massimiliano, Hjelm, Joakim, and Byström, Pär
- Abstract
Declines in predatory fish in combination with the impact of climate change and eutrophication have caused planktivores, including three-spined stickleback (Gasterosteus aculeatus), to increase dramatically in parts of the Baltic Sea. Resulting impacts of stickleback on coastal and offshore foodwebs have been observed, highlighting the need for increased knowledge on its population characteristics. In this article, we quantify abundance, biomass, size structure, and spatial distribution of stickleback using data from the Swedish and Finnish parts of the Baltic International Acoustic Survey (BIAS) during 2001-2014. Two alternative methods for biomass estimation suggest an increase in biomass of stickleback in the Baltic Proper, stable or increasing mean size over time, and larger individuals toward the north. The highest abundance was found in the central parts of the Baltic Proper and Bothnian Sea. The proportion of stickleback biomass in the total planktivore biomass increased from 4 to 10% in the Baltic Proper and averaged 6% of the total planktivore biomass in the Bothnian Sea. In some years, however, stickleback biomass has ranged from half to almost twice that of sprat (Sprattus sprattus) in both basins. Given the recent population expansion of stickleback and its potential role in the ecosystem, we recommend that stickleback should be considered in future monitoring programmes and in fisheries and environmental management of the Baltic Sea.
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- 2019
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19. The first large-scale assessment of three-spined stickleback (Gasterosteus aculeatus) biomass and spatial distribution in the Baltic Sea
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Olsson, Jens, primary, Jakubavičiūtė, Eglė, additional, Kaljuste, Olavi, additional, Larsson, Niklas, additional, Bergström, Ulf, additional, Casini, Michele, additional, Cardinale, Massimiliano, additional, Hjelm, Joakim, additional, and Byström, Pär, additional
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- 2019
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20. Report of the Baltic Fisheries Assessment Working Group (WGBFAS) : 19-26 April 2017, Copenhagen, Denmark
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Orio, Alessandro, Nielsen, Anders, Luzenczyk, Anna, Berg, Casper, Ustups, Didzis, Artemenkov, Dmitriy, Schade, Franziska, Kornilovs, Georgs, Degel, Henrik, Strehlow, Harry, Karpushevskiy, Igor, Horbowy, Jan, Raitaniemi, Jari, Boje, Jesper, Hjelm, Joakim, Lövgren, Johan, Pönni, Jukka, Hommik, Kristiina, Öhman, Kristin, Eero, Margit, Storr-Paulsen, Marie, Plikshs, Maris, Casini, Michele, Bergenius, Mikaela, Mosegaard, Henrik, Holmgren, Noel, Norrström, Niclas, Kaljuste, Olavi, Jounela, Pekka, Statkus, Romas, Jonusas, Stanislovas, Neuenfeldt, Stefan, Stoetera, Sven, Raid, Tiit, Mildenberger, Tobias, Gröhsler, Tomas, Krumme, Uwe, Amosova, Viktoriia, Grygiel, Wlodzimierz, Pekcan-Hekim, Zeynep, Mirny, Zuzanna, Orio, Alessandro, Nielsen, Anders, Luzenczyk, Anna, Berg, Casper, Ustups, Didzis, Artemenkov, Dmitriy, Schade, Franziska, Kornilovs, Georgs, Degel, Henrik, Strehlow, Harry, Karpushevskiy, Igor, Horbowy, Jan, Raitaniemi, Jari, Boje, Jesper, Hjelm, Joakim, Lövgren, Johan, Pönni, Jukka, Hommik, Kristiina, Öhman, Kristin, Eero, Margit, Storr-Paulsen, Marie, Plikshs, Maris, Casini, Michele, Bergenius, Mikaela, Mosegaard, Henrik, Holmgren, Noel, Norrström, Niclas, Kaljuste, Olavi, Jounela, Pekka, Statkus, Romas, Jonusas, Stanislovas, Neuenfeldt, Stefan, Stoetera, Sven, Raid, Tiit, Mildenberger, Tobias, Gröhsler, Tomas, Krumme, Uwe, Amosova, Viktoriia, Grygiel, Wlodzimierz, Pekcan-Hekim, Zeynep, and Mirny, Zuzanna
- Abstract
The ICES Baltic Fisheries Assessment Working Group (WGBFAS) met 19-26 April 2017(Chair: Tomas Gröhsler, Germany and Co-chair: Michele Casini, Sweden), with 41 participants and 9 countries represented. The objective of WGBFAS was to assess the status of the following stocks: Sole in Division 3.a, SDs 20–24; Cod in Kattegat, Cod in SDs 22–24, Cod in SDs 25–32; Herring in SDs 25–27, 28.2, 29 and 32, Herring in SD 28.1 (Gulf of Riga), Herring in SDs 30-31 (Gulf of Bothnia); Sprat in SDs 22–32; Plaice in SDs 21–23, Plaice in SDs 24–25; Flounder in SDs 22–23, in SDs 24–25, in SDs 26+28 and SDs 27+29–32; Brill in SDs 22–32, Dab in SDs 22–32 and Turbot in SDs 22–32. WGBFAS also identified the data needed for next year’s data call with some suggestions for improvements in the data call, and stock-specific research needs.The report contains an introduction with the summary of other WGs relevant for the WGBFAS, the methods used, and ecosystem considerations. The results of the analytical stock assessment or survey trends for the species listed above are then presented with all the stocks with the same species in the same sections. The report ends with references, recommendations, links to Stock Annexes and list of Working Documents.The principle analytical models used for the stock assessments were XSA and SAM. For most flatfishes and cod in SDs 25–32 (data limited stocks), CPUE trends from bottomtrawl surveys were used in the assessment (except plaice in SDs 24–25 for which relative SSB from SAM was used). For the data limited stocks, reference points based on length-based indicators were estimated (except cod in SDs 25-32 for which relative reference points were estimated using the SPiCT model). For cod in SDs 25–32, intersessional work was planned to hopefully allow returning to an analytical stock assessment in the near future. Ecosystem changes have been analytically considered in the following stock assessments: Herring in SD 25–27, 28.2, 29 and 32, and Sprat in SD 22–32
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- 2017
21. Report of the Baltic Fisheries Assessment Working Group (WGBFAS), 12-19 April 2016, ICES HQ, Copenhagen, Denmark
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Karpushevskaia, Anastasiia, Nielsen, Anders, Mikhaylov, Andrey, Luzenczyk, Anna, Florin, Ann-Britt, Albert, Anu, Berg, Casper Willestofte, Ustups, Didzis, Svecovs, Fausts, Bastardie, François, Kornilovs, Georgs, Strods, Guntars, Strehlow, Harry Vincent, Degel, Henrik, Karpushevskiy, Igor, Sics, Ivo, Horbowy, Jan, Raitaniemi, Jari, Boje, Jesper, Hjelm, Joakim, Lövgren, Johan, Pönni, Jukka, Hommik, Kristiina, Öhman, Kristin, Radtke, Krzysztof, Eero, Margit, Storr-Paulsen, Marie, Plikshs, Maris, Pedersen, Martin Wæver, Casini, Michele, Bergenius, Mikaela, Holmgren, Noél, Kaljuste, Olavi, Afanasyev, Pavel, Gasyukov, Pavel, Jounela, Pekka, Oeberst, Rainer, Statkus, Romas, Carlshamre, Sofia, Jonusas, Stanislovas, Neuenfeldt, Stefan, Stoetera, Sven, Smolinski, Szymon, Raid, Tiit, Arula, Timo, Gröhsler, Tomas, Zolubas, Tomas, Krumme, Uwe, Amosova, Viktoriia, Grygiel, Wlodzimierz, Pekcan-Hekim, Zeynep, and Mirny, Zuzanna
- Subjects
Fisk- och akvakulturforskning ,Fish and Aquacultural Science - Published
- 2016
22. Effekthöjningsprogrammet vid Forsmarks kärnkraftverk
- Author
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Adill, Anders, Heimbrand, Yvette, and Kaljuste, Olavi
- Subjects
Ecology - Abstract
Miljödomstolens deldom 2008-08-21 i målen M 1666-07/M 5786-07 lämnade Forsmark Kraftgrupp AB (FKA) tillstånd att enligt miljöbalken höja den termiska effekten vid kärnkraftverket från 9156 MW till 10281 MW. När effekthöjningen är slutförd beräknas kylvattenflödet ha ökat med cirka 20 procent till 170 kubikmeter per sekund för samtliga tre anläggningar och utsläppstemperaturen i Biotestsjön förväntas ha höjts från 10,3°C till 11,0°C. I samband med effekthöjningarna i kärnkraftverket förväntas den fysiska vattenmiljön och dess organismer påverkas främst genom ökat kylvattenflöde och därmed ytterligare höjda vattentemperaturer i närrecipienten. Enligt prövotidsförordnanden i domen ska det avgöras vilken betydelse den ökade vattenbortledningen av kylvatten och den ökade värmetillförseln till havet kan få för det allmänna fiskeintresset. FKA ska i samråd med Fiskeriverket (numera SLU, institutionen för akvatiska resurser), som är tillförordnad sakkunnig i utredningen, undersöka påverkan på fisket av den ökade vattenbortledningen och den ökade värmetillförseln enligt program (effekthöjningsprogrammet) som Fiskeriverket och FKA kom överens om. Resultatet av utförda undersökningar och utredningar med förslag till slutligt avgörande av frågorna ska redovisas till miljödomstolen senast fem år från det att effekthöjningarna tagits i drift. Denna rapport redovisar resultaten och kunskapsunderlaget från undersökningarna inom den första delen av effekthöjningsprogrammet under åren 2009-2014 samt ger en generell beskrivning av utvecklingen för delar av fisksamhället i Forsmarksområdet. Delmoment inom effekthöjningspro-grammet som avser effekter av ökat vattenflöde består av studier för fiskrekrytering av varmvattenarter i intagsområdet för kylvatten, fiskförluster i silstationerna på kraftverket samt effekter på uttransport av yngel från Biotestsjön. Moment som avser effekterna av ökad vattentemperatur i recipienten är ålders- och tillväxtstudier hos abborre, förekomst och överlevnad av sikyngel i plymområdet, samt anlockning av strömming och romöverlevnad i utsläppsområdet. Den första delen av undersökningarna genomförs innan det ökade energiuttaget inletts på kraftverket. När kärnkraftverket färdigställt utbyggnaden och produktionen uppnått den nya effektnivån ska undersökningarna inom effekthöjningsprogrammet upprepas under tre år. I slutrapporteringen av effekthöjningsprogrammet ska resultaten av utförda undersökningar och utredningar presenteras till miljödomstolen med slutligt utlåtande om effekterna för det allmänna fiskeintresset av den ökade vattenbortledningen av kylvatten och ökade värmetillförseln till havet. Resultaten från första delen av effekthöjningsprogrammet visar att tätheterna av abborre, gädda och mört är mycket låga i intagsområdet i Asphällafjärden. Förlusterna av fisk i silstationerna i kärnkraftverket är omfattande. De största mängderna fastnar under vårarna och senhöstarna, vilket sammanfaller med när den ordinarie provtagningen inom baskontrollprogrammet äger rum. Storspigg i provtagningarna utgör nästan 80 procent av rensmassorna till antalet. Tillväxten hos abborre under första levnadsåret är snabb för individer i Biotestsjön jämfört med abborrar i Forsmarks skärgård och Finbofjärden. I Forsmarksområdet har tillväxten hos årsyngel av abborre ökat sedan mitten av 1990-talet och har uppnått likadana tillväxthastigheter som hos abborrar från Biotestsjön. Denna utveckling finns inte hos abborrar i referensområdet Finbofjärden på Åland. I utsläppsområdet från Biotestsjön finns det en påvisad anlockning av strömming under vårperioden i samband med lek. Lekaktiviteten hos strömming är större inom effektområdet med uppvärmt vatten än på platser som inte påverkas av en temperaturökning. Förekomsten av sikyngel i utsläppsområdet är extremt låg, vilket sannolikt är en följd av den generella utvecklingen för arten i Bottenhavet. För att slutrapporteringen till miljödomstolen med slutligt avgörande i frågorna ska vara av erforderlig kvalité är det nödvändigt att kompletterande studier genomförs för att få tillräckligt med underlag. För att utröna den geografiska omfattningen av effekter av kylvattenutsläppet på strömming är det nödvändigt att utöver de redan planerade ekointegreringarna i kylvattenplymen komplettera med undersökningar i hela Öregrundsgrepen. Larv- och yngelundersökningar borde genomföras vid kylvattenintagen till kraftverket för att uppskatta förlusterna av fisk i dessa livsstadier. Dessutom bör det undersökas hur omfattande lekaktiviteten är för abborre och gädda i Asphällafjärden.
- Published
- 2014
23. Spatio-temporal composition and dynamics of zooplankton in the Kalmar Sound (western Baltic Sea) in 2009-2010
- Author
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Diaz-Gil, Carlos, Werner, Malin, Lovgren, Olof, Kaljuste, Olavi, Grzyb, Anna, Piotr Margonski, Casini, Michele, Swedish Agency for Marine and Water Management, and Swedish Environmental Protection Agency
- Subjects
Ecology - Abstract
In pelagic food webs, zooplankton is the link between lower and higher trophic levels. It is thus essential to know how the zooplankton community structure varies with its environment. We investigated the seasonal and spatial variation in the zooplankton diversity and community structure during two consecutive years in the Kalmar Sound, along the Swedish east coast, an area with a strong bathymetric gradient and of high ecological importance for e.g. commercial fish species. Two zooplankton communities were identified in the area: a coastal/estuarine community in the south and an open-water community in the north. They were separated mainly by differing salinity and temperature conditions. Biodiversity increased from spring to autumn and was higher in the open waters. © 2014., C. Díaz-Gil, M. Werner, O. Lövgren, O. Kaljuste and M. Casini were partially funded by the Swedish PLAN FISH project, financed by the Swedish Environmental Protection Agency and the Swedish Agency for Marine and Water Management. C. Díaz-Gil was also funded by the EU Erasmus Program for international mobility of students
- Published
- 2014
24. Report of the Baltic Fisheries Assessment Working Group (WGBFAS) : 14-21 April 2015, ICES HQ, Copenhagen, Denmark
- Author
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Bergenius, Mikaela, Boje, Jesper, Casini, Michele, Degel, Henrik, Eero, Margit, Florin, Ann-Britt, Gasyukov, Pavel, Grygiel, Wlodzimierz, Gröhsler, Tomas, Hjelm, Joakim, Horbowy, Jan, Holmgren, Noél, Norrström, Niclas, Kaljuste, Olavi, Karpushevskiy, Igor, Karpushevskaia, Anastasiia, Kornilovs, Georgs, Krumme, Uwe, Luzenczyk, Anna, Lövgren, Johan, Pönni, Jukka, Oeberst, Rainer, Raid, Tiit, Raitaniemi, Jari, Statkus, Romas, Stoetera, Sven, Storr-Paulsen, Marie, Ustups, Didzis, Walther, Yvonne, Bergenius, Mikaela, Boje, Jesper, Casini, Michele, Degel, Henrik, Eero, Margit, Florin, Ann-Britt, Gasyukov, Pavel, Grygiel, Wlodzimierz, Gröhsler, Tomas, Hjelm, Joakim, Horbowy, Jan, Holmgren, Noél, Norrström, Niclas, Kaljuste, Olavi, Karpushevskiy, Igor, Karpushevskaia, Anastasiia, Kornilovs, Georgs, Krumme, Uwe, Luzenczyk, Anna, Lövgren, Johan, Pönni, Jukka, Oeberst, Rainer, Raid, Tiit, Raitaniemi, Jari, Statkus, Romas, Stoetera, Sven, Storr-Paulsen, Marie, Ustups, Didzis, and Walther, Yvonne
- Abstract
The ICES Baltic Fisheries Assessment Working Group (WGBFAS) met 14-21 April 2015 (Chair: Mare Storr-Paulsen, Denmark), with 28 participants and 9 countries represented. The objective of WGBFAS was to assess the status of the following stocks: 1 ) Sole in Division IIIa, SDs 20-22 2 ) Cod in Kattegat, Cod in SD 22-24, Cod in SD 25-32 3 ) Herring in SD 25-27, 28.2, 29 and 32, Herring in SD 28.1 (Gulf of Riga), Herring in SD 30, Herring SD 31. 4 ) Sprat in SD 22-32 5 ) Plaice 21-23, Plaice 2425 6 ) Flounder 22-23; 24-25; 26+28 and 27+29-32, Brill 2232, Dab 2232, and Turbot 2232 (survey trends) WGBFAS also identified the data needed, for next year’s data call with some suggestions for improvements in the data call as well as in InterCatch. The report contains an introduction with the summary of other WGs relevant for the WGBFAS, country specific fishery description, the methods used, and ecosystem considerations. The results of the analytical stock assessment or survey trends for the species listed above are then presented with all the stocks with the same species in the same sections. The report ends with references, list of Working Documents, recommendations and Stock Annexes. In first quarter 2015 the Baltic cod stocks and the plaice stocks were benchmarked. As a result the Baltic cod stocks now have to apply a splitting key in SD 24 were both stocks are present. This has changed the assessment from being an area based assessment to now being a stock based assessments and has implications for the advice. The principle analytical models used for the stock assessments were XSA and SAM. For most flatfishes, CPUE trends from bottom trawl surveys were presented (except plaice 2425 and her31 using relative SSB from SAM and XSA, respectively). Ecosystem changes have been analytically considered in the following stock assessments: Herring in SD 25-27, 28.2, 29 and 32, and Sprat in SD 22-32, in form of cod predation mortality. Last year a very large retrospective pattern in th
- Published
- 2015
25. 'PLAN FISH: Planktivore management – linking food web dynamics to fisheries in the Baltic Sea'
- Author
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Appelberg, Magnus, Bergenius, Mikaela, Bergström, Ulf, Casini, Michele, Gårdmark, Anna, Hjelm, Joakim, Huss, Magnus, Kaljuste, Olavi, Olsson, Jens, Sahlin, Ullrika, Wennhage, Håkan, and Werner, Malin
- Subjects
Ecology ,Fish and Aquacultural Science - Published
- 2013
26. Report of the Baltic Fisheries Assessment Working Group (WGBFAS), 3-10 April 2014, ICES HQ, Copenhagen, Denmark
- Author
-
Storr-Paulsen, Marie, Anu, Albert, Arula, Timo, Boje, Jesper, Casini, Michele, Degel, Henrik, Eero, Margit, Gasyukov, Pavel, Gröhsler, Tomas, Hjelm, Joakim, Horbowy, Jan, Holmgren, Noél, Jonusas, Stanislovas, Kaljuste, Olavi, Karpushevskaia, Anastasiia, Karpushevskiyi, Igor, Kornilovs, Georgs, Krumme, Uwe, Luzenczyk, Anna, Lövgren, Johan, Mikhaylov, Andrey, Norrström, Niclas, Oeberst, Rainer, Pönni, Jukka, Raid, Tiit, Raitaniemi, Jari, Statkus, Romas, Stoetera, Sven, Strehlow, Harry Vincent, Ustups, Didzis, Walther, Yvonne, Storr-Paulsen, Marie, Anu, Albert, Arula, Timo, Boje, Jesper, Casini, Michele, Degel, Henrik, Eero, Margit, Gasyukov, Pavel, Gröhsler, Tomas, Hjelm, Joakim, Horbowy, Jan, Holmgren, Noél, Jonusas, Stanislovas, Kaljuste, Olavi, Karpushevskaia, Anastasiia, Karpushevskiyi, Igor, Kornilovs, Georgs, Krumme, Uwe, Luzenczyk, Anna, Lövgren, Johan, Mikhaylov, Andrey, Norrström, Niclas, Oeberst, Rainer, Pönni, Jukka, Raid, Tiit, Raitaniemi, Jari, Statkus, Romas, Stoetera, Sven, Strehlow, Harry Vincent, Ustups, Didzis, and Walther, Yvonne
- Published
- 2014
27. Spatio-temporal composition and dynamics of zooplankton in the Kalmar Sound (western Baltic Sea) in 2009-2010
- Author
-
Swedish Agency for Marine and Water Management, Swedish Environmental Protection Agency, Díaz-Gil, Carlos, Werner, Malin, Lövgren, Olof, Kaljuste, Olavi, Grzyb, Anna, Margonski, Piotr, Casini, Michèle, Swedish Agency for Marine and Water Management, Swedish Environmental Protection Agency, Díaz-Gil, Carlos, Werner, Malin, Lövgren, Olof, Kaljuste, Olavi, Grzyb, Anna, Margonski, Piotr, and Casini, Michèle
- Abstract
In pelagic food webs, zooplankton is the link between lower and higher trophic levels. It is thus essential to know how the zooplankton community structure varies with its environment. We investigated the seasonal and spatial variation in the zooplankton diversity and community structure during two consecutive years in the Kalmar Sound, along the Swedish east coast, an area with a strong bathymetric gradient and of high ecological importance for e.g. commercial fish species. Two zooplankton communities were identified in the area: a coastal/estuarine community in the south and an open-water community in the north. They were separated mainly by differing salinity and temperature conditions. Biodiversity increased from spring to autumn and was higher in the open waters. © 2014.
- Published
- 2014
28. Report of the Baltic Fisheries Assessment Working Group (WGBFAS), 10-17 April 2013, ICES Headquarters, Copenhagen
- Author
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Storr-Paulsen, Marie, Arula, Timo, Bergenius, Mikaela, Boje, Jesper, Casini, Michele, Degel, Henrik, Eero, Margit, Gasyukov, Pavel, Gröhsler, Tomas, Hjelm, Joakim, Horbowy, Jan, Holmgren, Noél, Jonusas, Stanislovas, Kaljuste, Olavi, Karpushevskaia, Anastasiia, Karpushevskiy, Igor, Kornilovs, Georgs, Krumme, Uwe, Luzenczyk, Anna, Lövgren, Johan, Mikhaylov, Andrey, Oeberst, Rainer, Pönni, Jukka, Raid, Tiit, Raitaniemi, Jari, Sics, Ivo, Statkus, Romas, Stoetera, Sven, Ustups, Didzis, Walther, Yvonne, Storr-Paulsen, Marie, Arula, Timo, Bergenius, Mikaela, Boje, Jesper, Casini, Michele, Degel, Henrik, Eero, Margit, Gasyukov, Pavel, Gröhsler, Tomas, Hjelm, Joakim, Horbowy, Jan, Holmgren, Noél, Jonusas, Stanislovas, Kaljuste, Olavi, Karpushevskaia, Anastasiia, Karpushevskiy, Igor, Kornilovs, Georgs, Krumme, Uwe, Luzenczyk, Anna, Lövgren, Johan, Mikhaylov, Andrey, Oeberst, Rainer, Pönni, Jukka, Raid, Tiit, Raitaniemi, Jari, Sics, Ivo, Statkus, Romas, Stoetera, Sven, Ustups, Didzis, and Walther, Yvonne
- Published
- 2013
29. Report of the Benchmark Workshop on Baltic Multispecies Assessments (WKBALT) : 4–8 February 2013, Copenhagen, Denmark
- Author
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Andersen, Michael, Arula, Timo, Casini, Michele, Clink, Sally, Collie, Jeremy, Eckeskog, Magnus, Eero, Margit, Eriksson, Pehr E., Gasyukov, Pavel, Gröhsler, Thomas, Holmgren, Noél, Horbowy, Jan, Howell, Daniel, Jepsena, Ilona, Johansson, Reine J., Janusas, Stanislovas, Kaljuste, Olavi, Karpushevskiy, Igor, Klaas, Kunnar, Kornilovs, Georgs, Krumme, Uwe, Linke, Sebastian, Lövgren, Johan, Luzenczyk, Anna, Maguire, Jean-Jacques, Neuenfeldt, Stefan, Norrström, Niclas, Oeberst, Rainer, Plaganyi, Eva, Plikshs, Maris, Raid, Tiit, Reeves, Stuart, Rindorf, Anna, Storr- Paulsen, Marie, Strehlow, Harry V., Vinther, Morten, Walther, Yvonne, Andersen, Michael, Arula, Timo, Casini, Michele, Clink, Sally, Collie, Jeremy, Eckeskog, Magnus, Eero, Margit, Eriksson, Pehr E., Gasyukov, Pavel, Gröhsler, Thomas, Holmgren, Noél, Horbowy, Jan, Howell, Daniel, Jepsena, Ilona, Johansson, Reine J., Janusas, Stanislovas, Kaljuste, Olavi, Karpushevskiy, Igor, Klaas, Kunnar, Kornilovs, Georgs, Krumme, Uwe, Linke, Sebastian, Lövgren, Johan, Luzenczyk, Anna, Maguire, Jean-Jacques, Neuenfeldt, Stefan, Norrström, Niclas, Oeberst, Rainer, Plaganyi, Eva, Plikshs, Maris, Raid, Tiit, Reeves, Stuart, Rindorf, Anna, Storr- Paulsen, Marie, Strehlow, Harry V., Vinther, Morten, and Walther, Yvonne
- Published
- 2013
30. Effects of mammal predation on small pelagic fish
- Author
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Gårdmark, Anna, Östman, Örjan, Lundström, Karl, Karlsson, Olle, Pönni, Jukka, Lindegren, Martin, Nielsen, Anders, Kaljuste, Olavi, Aho, Teija, Gårdmark, Anna, Östman, Örjan, Lundström, Karl, Karlsson, Olle, Pönni, Jukka, Lindegren, Martin, Nielsen, Anders, Kaljuste, Olavi, and Aho, Teija
- Published
- 2011
31. Fishing or the environment – what regulates recruitment of an exploited marginal vendace (Coregonus albula (L.)) population?
- Author
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Bergenius, Mikaela A.J., primary, Gårdmark, Anna, additional, Ustups, Didzis, additional, Kaljuste, Olavi, additional, and Aho, Telja, additional
- Published
- 2013
- Full Text
- View/download PDF
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