Tag: Herring

Reports

Herring catch and products in Norway and Iceland 2010-2016

Published:

11/09/2018

Authors:

Páll Gunnar Pálsson, Sveinn Margeirsson

Supported by:

Product Development Center for Seafood

Herring catch and products in Norway and Iceland 2010-2016

The purpose of this report is to evaluate general and public data in the seafood value chain with a view to analyzing value creation and attempting to compare different value chains. It was therefore decided to compare the utilization of herring in Norway and Iceland. The main reason for examining the herring in these countries is that there is also a presentation of data in both countries and that processing takes place in a similar way. The information in both countries did not prove to be of such a nature that conclusive conclusions could be drawn based on the data available. It is therefore necessary to make various improvements in data collection and publication if the possibility of comparing value chains is to be available in a reliable manner.

The purpose of this summary is to evaluate how public data from seafood value chains can be used to understand the dynamics of the seafood industry and benchmark different seafood value chains against each other. To do so, we have chosen to compare how herring catch is utilized in Norway and Iceland. The reason for choosing this species is good access to public data and the likeliness of production in those two countries. We have analyzed what types of products are made from the available catch and identified the differences between the two countries regarding herring utilization. Based on the case of Norwegian and Icelandic herring value chains it is clear, that great improvements are needed in order to be able to use public data from seafood value chains to understand the dynamics of the seafood industry and benchmark different seafood value chains against each other .

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Reports

Drying of herring fillets

Published:

01/04/2012

Authors:

Vigfús Ásbjörnsson, Guðjón Þorkelsson, Loftur Þórarinsson, Arnljótur Bjarki Bergsson, Aðalheiður Ólafsdóttir

Supported by:

AVS Fisheries Research Fund

Contact

Guðjón Þorkelsson

Strategic Scientist

gudjon.thorkelsson@matis.is

Drying of herring fillets

The aim of the project is to create added value by fully processing herring products in Iceland by researching the processes of dried herring for human consumption in foreign markets. Dried herring markets in Japan and processing methods were studied. An experiment was conducted with a production process that aims to shorten work processes in a centuries-old Japanese drying method called the Migaki effect on herring (air drying).

The projects goal is to create increased value through processing of herring products in Iceland by analyzing production methods of dried herring for human consumption in foreign markets. Analyzes where performed on dried herring markets in Japan as well as production methods. Experiment was performed that aims to shorten the procedures of an ancient Japanese method of drying herring known as the Migaki method, (air drying).

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Reports

Ichthyophonus hoferi herring and other fishes / Ichthyophonus hoferi in infected herring and other fishes

Published:

01/12/2009

Authors:

Sigurlaug Skírnisdóttir, Sigurbjörg Hauksdóttir, Eyjólfur Reynisson, Sigurður Helgason, Guðmundur Óskarsson, Sigríður Hjörleifsdóttir

Supported by:

AVS small project

Contact

Sigurlaug Skírnisdóttir

Project Manager

sigurlaug.skirnisdottir@matis.is

Ichthyophonus hoferi herring and other fishes / Ichthyophonus hoferi in infected herring and other fishes

The aim of the project was to set up a simple DNA analysis method to detect the parasite Ichthyophonus hoferi in infected fish and to check if there is a difference between the parasite found in herring and plaice in Iceland. The intention was also to investigate whether I. hoferi was found in cod that had eaten infected herring, both fresh and salted fish. The objectives of the project were achieved, but the method development was more extensive than expected in the application. In this project, technology was developed for the genetic analysis of the Ihoferi infection in herring and plaice in Iceland. Methods based on conventional PCR and sequencing were tested and developed, in fact time PCR but also genetic analysis with the size analysis of the 18S mark, but to the best of our knowledge, the latter two methods have not been used before to analyze the I. hoferi. The method can be used both to diagnose infection in blood-rich organs such as the heart and kidneys but also in infected flesh. The cod could not be detected in cod. In the future, the method can be used for further research into the infection to try to shed light on the extent and extent of the infection and to try to identify the origin of the infection by applying the method to the different food types of herring.

The goal of the project was to develop a genetic analysis method to diagnose if the parasite Ichthyophonus hoferi was found in herring and other fish species. Furthermore, to determine if the same parasite species was infecting herring and infecting European plaice (Pleuronectes platessa) in Icelandic waters. Another goal was to analyze if I. hoferi could be found in cod (Gadus morhua) either salted or fresh which had been caught from infected herring areas during 2009. The goal of the project was reached and four different genetic methods were tested and all were successful. Conventional PCR technique as well as sequencing was used in the project. Real-time PCR and genotyping on ABI3730 sequencing machine were also developed successfully. The most sensitive technique is the last one (genotyping on ABI3730). The last two methods have not been published to our knowledge in this purpose. We detected I. hoferi parasite both in hearts, kidneys and fresh fillets of the fish. The parasite could not be detected in cod. In future studies, these techniques may be used for research of the origin of the parasite in the herring feed and to determine the distribution of the parasite.

Report closed until 01-01-2012

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Reports

Improved quality of herring for human consumption

Published:

01/12/2007

Authors:

Ásbjörn Jónsson, Hannes Hafsteinsson, Irek Klonowski, Valur N. Gunnlaugsson

Supported by:

Nordic Innovation Center

Contact

Valur Norðri Gunnlaugsson

Research Group Leader

valur.n.gunnlaugsson@matis.is

Improved quality of herring for human consumption

Herring is one of the most important fish species in the North Atlantic and the Baltic Sea. Although a large part of the catch goes to human consumption, about 85% of herring is processed into fish oil and flour. There is a general desire to increase the consumption of herring for human consumption. It was important to study the different factors that affect the quality of herring and especially how they are controlled by biological conditions. The main reason for the quality problems in herring is the high content of compounds that promote development, and affect the color and texture changes, as well as the loss of nutrients. Better quality results in increased competition for herring production in the Nordic countries, as well as a positive consumer attitude towards herring products. The main goal of the project was to improve the quality and quantity of herring, for consumption, by researching the quality of the raw material after fishing. Emphasis was placed on quality immediately after fishing and the quality of the raw material after varying periods of frost. Factors such as fishing location and fishing time did not affect the quality of the herring. However, freezing at -20 ° C had a significant effect on the quality of the raw material.

Herring is one of the most important fish species in the North Atlantic and Baltic Sea, with an annual catch exceeding 2 million tonnes. Although a large part of these fish is used for human consumption, as much as 85% of the herring is used for industrial production of fish meal and fish oil. There is a general wish to increase the utilization of herring for human consumption. Thus, it was important to study the various parameters which influence the quality of herring, and in particular how these paramenters are controlled by biological factors. A major reason behind quality problems arising during post-harvest handling of herring is its high content of compounds that efficiently catalyzes the development of rancidity, pigmentation, texture changes and loss of nutritional value. Improved quality will result in increased competitiveness of the Nordic fish processing industry and would improve the attitude among consumers towards herring products. The general objective of the project was to improve the quality and quantity of herring to be used for food production by investigating how natural variation in raw material characteristics affects post-harvest quality. Attention was given to the quality immediately after landing and the quality after period of frozen storage. The results indicated no clear differences in the quality of herring regarding catching place or season. The frozen storage for a prolonged time had the major influence on the quality of herring fillets.

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