Browsing by Subject "Baltic herring"

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  • Hanstén, Magnus (Helsingin yliopisto, 2019)
    An increasing number of fisheries utilize rights-based management approaches for achieving economic, social and environmental sustainability. It is widely accepted that fisheries management is to a large extent about managing human behaviour, hence social acceptance is prerequisite for a successful management regime. Based on stakeholder interviews, this study analyses the opinions related to the recently implemented individual transferable quota (ITQ) system for the Finnish herring and sprat fisheries. Similarly, opinions were collected in 2007 by Kulmala et al. related to a possible implementation of ITQs, thus creating a unique opportunity to compile results from both a pre and post individual quota management implementation scenario. In 2007, it was suggested that fishers would largely support an ITQ system in Finland. Accordingly, this study implies that most of the Finnish stakeholders are content with the properties of the new system, however inequalities were perceived among fishers targeting fish for human consumption. In general, the system is expected to achieve its primary goal of improved economic efficiency within the fishery industry.
  • Huotari, Jaana (Helsingin yliopisto, 2020)
    This study aimed to investigate the microbiological quality of the whole and gutted Baltic herring at different seasons by traditional culture-dependent methods combined with the identification of bacterial isolates by MALDI-TOF MS. Additionally, the microbiome of the herring was characterized by culture-independent 16S rRNA gene amplicon sequencing. Bacterial counts were within acceptable limits at all seasons although the H2S-producing bacteria levels were above the recommended level of 5 log10 CFU g-1 at two sampling points. With the culture-dependent methods and the sequencing of the 16S rRNA gene, the microbiome of the whole and gutted herring was dominated by the bacterial class Gammaproteobacteria. Shewanella, Pseudomonas, and Aeromonas were the most frequently isolated genera among the viable population identified with MALDI-TOF MS. With the culture-independent approach, Shewanella followed by Psychrobacter were the most abundant genera. Additionally, a high relative abundance of the phyla Firmicutes and Actinobacteria and, in some samples, Epsilonbacteriaeota represented by the genus Arcobacter, was detected. Variances in the microbiological quality of different herring batches observed in this study could not be attributed to the season. Therefore future research through a longer period was proposed, including data on the environmental factors, such as the fishing location and the water quality, possibly affecting the quality of the herring.
  • Damerau, Annelie; Kakko, Tanja; Tian, Ye; Tuomasjukka, Saska; Sandell, Mari; Hopia, Anu; Yang, Baoru (2020)
    A promising way of processing Baltic herring, Clupea harengus membras, is turning the fish into boneless mince. However, Baltic herring is prone to lipid oxidation, which possesses a challenge for industrial applications. The aim of this work was to study the efficacy of press cakes from Finnish berries and a supercritical CO2 plant extract to limit lipid oxidation during frozen storage of Baltic herring mince and to determine the impact of these additions on consumer acceptance in a fish product. Peroxide value, formation of volatile oxidation products and loss of polyunsaturated fatty acids showed that the tested natural additives decreased oxidation to a greater or similar extent as conventional antioxidants during 10-month storage. While potential of berry press cakes and plant extracts as "green label antioxidants" was shown, consumer study indicated need for further research to reach both optimal antioxidative efficacy and sensory properties.
  • Haapasaari, Paivi; Ignatius, Suvi; Pihlajamaki, Mia; Sarkki, Simo; Tuomisto, Jouni; Delaney, Alyne (2019)
    This article focuses on the dioxin problem of Baltic herring and salmon fisheries and its governance that is based on natural scientific knowledge. The dioxin problem weakens the perceived quality of Baltic salmon and herring as food and affects the way the catches can be used. This influences negatively the fishing livelihood, the coastal culture, and the availability of the fish for consumers. We explored how the governance of the dioxin problem could be improved, to better address its socio-economic and cultural implications. We identified four main actions: (1) adopt environmental, economic and social sustainability, and food security and safety as shared principles between the environmental, food safety/public health, and fisheries policies, (2) establish collaboration between the environmental, public health, and fisheries sectors at the regional level, (3) enhance interaction around the dioxin problem within the fisheries sector, and (4) support the participation of the Baltic fisheries stakeholders in the EU-level food safety governance. Viewing dioxins in fish not only as a natural scientific problem but as a multidimensional one would enable a wider toolbox of governing instruments to be developed to better address the different dimensions. This would support steps towards collaborative governance and a food system approach.
  • Kulmala, S.; Peltomäki, H.; Lindroos, M.; Kuikka, S.; Söderkultalahti, P. (Helsingin yliopisto, taloustieteen laitos, 2005)
    Discussion Papers
  • Haapasaari, Päivi; Ignatius, Suvi; Pihlajamaki, Mia; Bryhn, Andreas; Sarkki, Simo; Tuomisto, Jouni T.; Ronkainen, Lauri; Lehikoinen, Annukka; Assmuth, Timo; Romakkaniemi, Atso; Peltonen, Heikki; Kuikka, Sakari (2021)
    The implementation challenge of ecosystem-based (fisheries) management (EB(F)M) has entailed calls for integrated governance (IG) approaches in the marine field. We arranged an expert workshop to study the preconditions and applicability of IG, and to suggest how IG could be arranged in practice. Focusing on the management of the dioxin problem shared by the herring and salmon fisheries in the Baltic Sea, and using a coupled ‘insight network’- SWOT (strengths, weaknesses, opportunities, threats) methodology, we evaluated two scenarios: 1) IG of herring and salmon fisheries to benefit from collaboration between these fisheries that suffer from the same problem, and 2) IG between the fisheries sector and the food/public health sector to incorporate food safety in fisheries governance. Our results demonstrate that a variety of societal, political, institutional, operational, instrumental, and biological factors affect the applicability of IG in marine contexts, and work as preconditions for IG. While societal needs for IG were obvious in our case, as major challenges for it we identified the competing cross-sectoral objectives, path dependencies, and limitations of experts to think and work across fields. The study suggests that establishing an IG framework by adding new aspects upon the current governance structures may be easier to accept and adapt to, than creating new strategic or advisory bodies or other new capacities. Viewing IG as a framework for understanding cross-sectoral issues instead of one that requires a defined level and form of integrated assessment and management may be a way towards social learning, and thereby towards the implementation of more sophisticated, open and broad EB(F)M frameworks.