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Breytileiki í fituinnihaldi og eiginleikum þorsks eftir árstíma / Seasonal variation of fatty acid composition of cod flesh

Author(s):

Kristín Anna Þórarinsdóttir, Helga Gunnlaugsdóttir, Jónas R. Viðarsson, Sigurjón Arason

Funded by:

Verkefnasjóður Sjávarútvegsins

Contact

Helga Gunnlaugsdóttir

Group Leader

helga@matis.is

Breytileiki í fituinnihaldi og eiginleikum þorsks eftir árstíma / Seasonal variation of fatty acid composition of cod flesh

Í skýrslunni eru teknar saman niðurstöður mælinga á efnainnihaldi lifrar og þorskvöðva eftir árstíma og veiðislóð. Niðurstöður benda til þess að árstíðabundnar sveiflur í fituinnihaldi vöðva séu tiltölulega litlar. Öðru máli gegnir um lifur, fituinnihald hennar reyndist lægst síðari hluta vetrar og að vori. Á sama tíma var vatnsinnihald hæst.   Breytingar í efnasamsetningu lifrar voru taldar tengjast þeim sveiflum sem verða í hegðunarmynstri og líkamsstarfsemi fisksins í kringum hrygningu.

The report summarizes the results from measurements on chemical composition of liver and muscle of cod as affected by fishing grounds and seasonal variation. The results indicate that seasonal fluctuations in fat content of the muscle are relatively low. On the contrary, fat and water content in liver, varied with season. The fat content was lowest   late winter and in spring. At the same time, the highest water content in liver was observed.   These changes were explained by changes in behaviour and physiological functional of the fish in relation to the reproductive cycle.

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Categories
Reports

Production of salted fish in the Nordic countries. Variation in quality and characteristics of the salted products

Author(s):

Kristín Anna Þórarinsdóttir, Ingebrigt Bjørkevoll, Sigurjón Arason

Funded by:

NORA (Journal nr. 510‐036)

Contact

Sigurjón Arason

Head Engineer

sigurjon.arason@matis.is

Production of salted fish in the Nordic countries.   Variation in quality and characteristics of the salted products

The Nordic countries are the largest exporters of salted gadoid products, whereas countries in South‐Europe and Latin America are the biggest importers. In Norway, Iceland and Faroe Islands, cod is primarily used for the production. The characteristics of the salted fish, such as commercial quality and weight yield vary between the countries and between producers. These attributes are influenced by differences in catching methods, handling and salting methods. This report summarises the variation in these procedures, and in addition, the market segmentation of salted products, from the different countries.

Meginhluti saltfiskframleiðslu í heiminum fer fram innan norrænu landanna en stærsti neytendahópurinn er í S‐Evrópu og S‐Ameríku.   Þorskur er megin hráefnið en einnig er framleiddur saltfiskur úr öðrum skyldum tegundum, s.s. ufsa, löngu, ýsu og keilu.    Eiginleikar saltfiskafurð, svo sem gæði og nýting, eru breytilegir milli framleiðslulanda og framleiðenda.    Þessir breytur eru háðar veiðiaðferðum, hráefnismeðhöndlun og söltunaraðferðum.    Skýrslan er samantekt á breytileika í þessum þáttum milli framleiðslulanda, ásamt úttekt á hlutdeild þeirra á saltfiskmörkuðum.

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