In book: The World of Sea Cucumbers, Challenges, Advances, and Innovations. 1st Edition, pp. Editors: Annie Mercier, Jean-Francois Hamel, Andrew Suhrbier, Christopher Pearce. ISBN: 9780323953771.
Höfundur: Kristín Edda Gylfadóttir
Tengiliður
Gunnar Þórðarson
Svæðisstjóri
gunnar.thordarson@matis.is
Litur á tálknum hefur um langan tíma verið notaður til að meta ferskleika á fiski, en þekkt er að við geymslu breytist litur og þau dökkna. Þegar ofurklæling á laxi var tekin upp sem bætti gæði framleiðslu, fylgdi böggull skammrifi aðferðinni þar sem tálknin dökknuðu við kælinguna; en litabreytingin getur valdið erfileikum á markaði og gefið ranglega til kynna að ferskleiki sé ekki nægilega góður.
Það var því mikilvægt að fá svör við því hvers vegna þessi litabreyting á sér stað við ofurkælingu, sem er skilgreind sem kæling undir 0 °C og minna eða jafnt og en 20% af vatnsinnihaldi vöðvans sé frosið. Rannsóknarspurningin var því hvort það væri saltið eða kuldinn í kælimiðli sem orsökuðu litabreytingu. Niðurstaða verkefnisins er ótvírætt að kælingin er orsakavaldur og litur tálkna breytist við að frjósa við kælingu sem er miðuð við að kælimiðill sé -2,5 °C og kælitími um 80 mínútur.
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The colour of the gills has long been used to evaluate the freshness of fish, but it is known that during storage, the colour changes and they darken. When super chilling of salmon was introduced which improved the quality of production, a problem followed by the gills darkening during chilling; but the colour change can cause difficulties in the market and incorrectly indicate that freshness is not satisfactory.
It was therefore important to obtain answers as to why this discoloration occurs during supercooling, which is defined as cooling below 0 ° C and less or equal to 20% of the water content of the muscle being frozen. The research question was whether it was the salt or the cold in the refrigerant that caused the colour change.The result of the project is unequivocally that the cooling is the cause and the colour of the gills changes when it freezes during cooling, which is based on a refrigerant of -2.5 ° C and a cooling time of about 80 minutes.
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Tengiliður
Jónas Rúnar Viðarsson
Áherslusviðsstjóri
jonas@matis.is
This report is commissioned by Seafish and the Grimsby seafood cluster in the UK with the aim to get and overall understanding of connections and dependencies in ownership of the largest seafood companies in Iceland, and how these can potentially affect supply to the UK.
Quota consolidation has been a feature of Iceland‘s fisheries sector since 1991, when the government introduced individual transferable quotas (ITQs) across all species. This allowed some companies to buy up quotas from others, and catch them in a way which, in theory, ought to be more efficient. The concept is that overall economic return from the resource will be maximised by allowing for such optimisation. Now, almost three decades later, the economy of scale has resulted in extreme consolidation across the seafood sector, where smaller companies have merged into larger ones or been bought up by the big vertically integrated seafood companies.
The catching and processing sectors have been going through major development phase in recent years, as vessels and processing technologies have advanced and become much more efficient. This however comes with a price tag that only the larger companies can afford, which in return has escalated consolidation. As example, in 1991 the ten largest companies owned 24% of the overall quota in cod-equivalent but have now possession of 52% of the quota; and the twenty largest companies own 72%.
In order to maintain diversity in the industry and to avoid ending up with only a handful of companies possessing the entire quota, the government placed a cap (quota ceiling) on how much individual companies are allowed to own of the quota. For the main ITQ system this cap is 12% in cod-equivalent and for the coastal fleet (vessels below 15 meters) the quota ceiling is at 5%. However, at present, if a company holds a stake of less than 50% in another firm, that latter firm’s quota holdings do not count towards the quota ceiling. As results, many of the larger companies have now cross-ownership that are not very transparent. Clusters of connected companies have therefore emerged, which are dependent on each other.
In the spring of 2019, the government formed a committee that was to review and suggest on how “connected companies” should be defined with regard to the quota ceiling. The committee returned its suggestions in end of 2019. The main results were that majority ownership should still be needed to count quotas against the ceiling. Increased transparency is however suggested, obligating companies that possess more than 6% of the quota (2.5% of the coastal fleet quota) to disclose cross-ownership with the Directorate of fisheries.
This report gives a brief overview of cross-ownership and dependencies between the largest seafood companies in Iceland and concludes how these may affect supply to the UK, particularly in regard to supplies of fresh whole fish. The report also provides information on major investments that have occurred in the last few years that are likely to effect supply of fresh whole fish to UK.
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Tengiliður
Jónas Rúnar Viðarsson
Áherslusviðsstjóri
jonas@matis.is
This report provides an overview of the main findings of work package 1 in the SUPREME project, which is funded by the Norwegian Research Council (Forskningsrådet). The primary objective of the project is to increase the resource utilization and value creation from whitefish rest-raw materials from the Norwegian sea-going fleet into valuable ingredients and WP1 focuses on mapping and logistics management. WP1 has previously published a report on supply chain process mapping, and this report follows up on that work by presenting a Supply Chain Network analysis and providing recommendations for improved logistics to increase utilisation of rest-raw materials (RRM) from the Norwegian sea going fleet.
The total utilisation of whitefish is fairly good compared to most other countries, but it is still possible to improve. The report provides and overview of where, when and in what format whitefish is landed in Norway, and the extent of current RRM utilisation. The whitefish landings are mostly concentrated over just a three-month period (February – April) and overwhelming majority of the catches are landed in just a handful of municipalities. It is therefore evident that in order to increase utilisation the focus should be on improvements where most of the raw material is available. Major part of the catches of the sea-going fleet is landed frozen, headed and gutted; and then exported in the same format. Much of the heads and viscera are not landed in these cases, and other raw materials do not become available in Norway. It is difficult for the sea-going fleet to make changes on their supply chain, as for example onboard technology, human resources and storage space limits the possibilities to preserve and land heads and viscera. In addition, the logistics are also very challenging in Norway.
Among the solutions suggested in this report is for the authorities to provide additional incentives for landing RRMs, particularly in the municipalities with significant whitefish landings. This could for example be in the form of adding to the infrastructure in the harbours, or by facilitating that a collector vessel would tranship RRMs to land. Probably the most practical and applicable solution identified in the report is however a rather “low-hanging fruit” that concerns improving information sharing between the different links in the supply chain. Sharing information between the fishing vessels and the processing companies would have mutual benefits in increasing revenue and increasing utilization.
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Tengiliður
Georges Lamborelle
Stöðvarstjóri tilraunaeldisstöðvar
georges@matis.is
Þessi skýrsla er lokuð / This report is closed.
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Tengiliður
Georges Lamborelle
Stöðvarstjóri tilraunaeldisstöðvar
georges@matis.is
Þessi skýrsla er lokuð / This report is closed.
Tengiliður
Georges Lamborelle
Stöðvarstjóri tilraunaeldisstöðvar
georges@matis.is
Þessi skýrsla er lokuð / This report is closed.
Tengiliður
Margrét Geirsdóttir
Verkefnastjóri
mg@matis.is
The main objective is to effectively denature the autolysis enzymes of C. frondosa on the premise of avoiding the quality deterioration caused by overheating. The effects of the different thermal treatments (blanching at 40–80 °C for 45 min, boiling and steaming at 100 °C for 15–120 min) on the cooking yield, moisture content, protein degradation, texture, and enzyme inactivation were studied, and the inner relationship was investigated by multivariate analysis. The autolysis enzymes of C. frondosa were thermally stable and cannot be denatured completely by blanching. Boiling and steaming could efficiently inactivate the enzymes but overheating for 60–120 min reduced the cooking yield and texture quality. Boiling at 100 °C for 45 min was suitable for pre-treatment, with cooking yield of 70.3% and protein content of 78.5%. Steaming at 100 °C for at least 30 min was preferable for long-term storage and instant food, in which the relative activity was only 3.2% with better palatability.
Tengiliður
Guðjón Þorkelsson
Stefnumótandi sérfræðingur
gudjon.thorkelsson@matis.is
Edible seaweeds are usually sold as flakes or even powers, and morphological identification of seaweed taxa is difficult. Water-soluble polysaccharides (WSPs) in edible seaweeds are not only interesting functional food ingredients (e.g. gel-forming property, health benefits), but also useful for seaweed taxon differentiation. The current study aims to explore the utility of monosaccharide profiling of WSPs in seaweed differentiation. We developed a high-performance liquid chromatography-photodiode array detection for monosaccharide determination, and characterized monosaccharide profiles of WSPs from five edible seaweeds sold in Iceland (i.e. kombu Iceland – Laminaria hyperborea, sugar kelp – Saccharina latissima, dulse – Palmaria palmata and two types of nori labelled as Porphyra sp. and Pyropia sp.). Monosaccharide profiling data reflected both the complexity and quantitative differences of WSPs. The seaweed dulse showed the highest concentrations of total sugar (ca. 16 mM), followed by kombu (ca. 12 mM). From monosaccharide profiling of red algae, it was found that galactose (ca. 81–87% of total sugars) and xylose (ca. 65–77% of total sugars) are the dominant sugars in nori and dulse, respectively, which reflected the presence of galactans and xylans. In brown algae (i.e. kombu and sugar kelp), glucose (ca. 64–83%) and fucose (13–20%) are the main sugars, and they represent laminarins and fucoidans. The principal component analysis of sugar profiles showed the useful patterns ‘for seaweed taxon differentiation. The dendrogramresulting from hierarchical cluster analysis is congruent with phylogenetic tree, implying the chemotaxonomic value of seaweed monosaccharide profiles. This tool will be more useful in authentication of seaweed taxa when morphological and genetic identifications are not available.
Tengiliður
Margrét Geirsdóttir
Verkefnastjóri
mg@matis.is
Spirulina algae (Spirulina platensis) cultivated in geothermally powered photobioreactors is here proposed as a potentially resource efficient, zero-carbon, and nutritious alternative to conventional beef meat. Employing a standard life cycle assessment, environmental impacts of large-scale Spirulina production in this facility are calculated. The production facility is sited in Orka náttúrunnar (ON Power) Geothermal Park, Iceland, and benefits from resource streams accessible through Hellisheiði (Hellisheidi) power station, including renewable electricity for illumination and power usage, hot and cold water streams for thermal management, freshwater for cultivation, and CO2 for biofixation. During cultivation, GHG-intensive ammonia-based fertilizers are replaced with macronutrients sourced from natural open mines. LCA results show that production of 1 kg of wet edible biomass in this facility requires 0.0378 m2 non-arable land, 8.36 m3 fresh water and is carbon neutral with − 0.008 CO2-eq GHG emissions (net zero). Compared with conventionally produced meat from beef cattle, Spirulina algae cultured in the ON Power Geothermal Park, referred to in this study as GeoSpirulina, requires less than 1% land and water and emits less than 1% GHGs. Considering food and nutritional security concerns, cultivation in a controlled environment agriculture system assures consistent nutritional profile year-round. Moreover, GeoSpirulina biomass assessed in this study contains all essential amino acids as well as essential vitamins and minerals. While keeping a balanced nutrition, for every kg beef meat replaced with one kg GeoSpirulina, the average consumer can save ~ 100 kg CO2-eq GHGs. It is concluded that environmental impacts of GeoSpirulina production in the Hellisheidi facility are considerably lower than those of conventionally produced ruminants.