Gulldepla Archives

Experimental fishing and exploitation of Mueller's pearlsides

Post author By admin
Post date 01/10/2012

Published:

01/10/2012

Authors:

Ragnheiður Sveinþórsdóttir, Margrét Geirsdóttir, Hólmfríður Hartmannsdóttir

Supported by:

AVS Fisheries Research Fund

Contact

Margrét Geirsdóttir

Project Manager

mg@matis.is

Experimental fishing and exploitation of Mueller's pearlsides

Gulldepla has been seen to a small extent off Iceland in recent years, but an unusual amount has been seen off the south coast of Iceland in the winters of 2008/2009 and 2009/2010. Several vessels started trying to catch it in December 2008 and January 2009 with good results and the hearth went into smelting. In the project, various possibilities were considered regarding the utilization of the gold mine and it would be interesting to examine some of them better with regard to the increase in value that they could entail. The possibility of using gold nuggets in surimi, canning, feed in aquaculture, bait, pet treats or the production of bioactive substances was discussed. It was especially interesting to see how light products from gold dust turned out to be when bioactive substances were made from it, compared to the starting raw material and also what taste and smell turned out to be acceptable.

Mueller's pearlside has not historically occurred on Icelandic fishing grounds, but from 2008 pelagic fishers found an increase on the south coast of the country. Exploratory fishing trips were undertaken by a few ships in December 2008 and January 2009. The catch rate was acceptable and the catch was processed into fishmeal. In the project, multiple potential uses for pearlside were investigated and some produced results that indicated it would be worthwhile to research further due to the increased value they may lead to. For example, applications included surimi, canning, aquaculture feed, bait, pet treats or products with bioactivity. The most interesting result was how light the fish protein extracts were compared to the raw mince material when the bioactivity was explored, and also that the taste and smell were very acceptable.

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Increased value of seafood with an emphasis on products for use in fish meal and fish oil production to product development

Post author By admin
Post date 01/12/2010

Published:

01/12/2010

Authors:

Magnús Valgeir Gíslason, Sigurjón Arason, Sindri Sigurðsson

Supported by:

Regional Development Institute, Development Division, Countervailing Grant of the Food Division of the East Iceland Interest Rate Agreement

Increased value of seafood with an emphasis on products for use in fish meal and fish oil production to product development

In 2008, gold nuggets were first caught in significant quantities, gold nuggets are very sensitive to salt uptake from fishing to processing. To reduce the salt content of the flour, broth from the processing was passed through a membrane filter set up by coarse centrifugation. This equipment was able to reduce the salt content from 11% to 4.5%. Membrane filtration equipment is expensive and has a high maintenance cost to run it in the process. Therefore, it was decided to change the procedure for fishing, storage and landing without changing the production process for flour processing, and this action has resulted in a reduction in the salt content of gold powder flour from 10 - 12 %, which is too high, down to 5 - 6 %.

Silvery lightfish was first caught 2008 near Iceland. Salt diffusion is a problem in silvery lightfish from catch to processing. To lower the salt content in fishmeal the stickwater was put through a membrane filter after coarse centrifuge, with this method the salt content was lowered from 11% down to 4,5%. The membrane filter system is expensive and maintenance cost is relatively high. These are the main reasons for changing procedure while catching, storing and landing without changing the fishmealprocess. This procedure has made salt content in silvery lightfish meal dropp from 10 - 12 % witch was to high down to 5 - 6 %.