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"Aquaculture, not the Internet, represents the most promising investment opportunity of the 21st Century."

- Peter Drucker, Management Expert & Economist

2009-03-11

Skotske muslingeopdrættere afprøver det "kontinuerlige reb"

I stedet for at have en hovedline med nedhængende, kortere, liner/tamper, hvorpå muslingerne sætter sig og vokser kan det også lade sig gøre at have en lang line, som hænger i 'løkker'. Dette muliggør det 'uendelige reb'. Dette system er oprindeligt udviklet af på New Zeland og er nu stærkt automatiseret/mekaniseret.

Der ser ud til at være flere fordele:
  • Mindre/intet vedligehold
  • Mindre behov for 'håndarbejde' - mindre fysisk arbejdsintensivt
  • Indsamlet muslingeyngel (settlings/spat) implementeres maskinelt på linen.
  • Linen overtrækkes med en (meeeget laaang) 'sok'
  • Den lange 'sok' hænges ud i løkker (op til 15 meters dybde).
  • Sokken forhindrer utilsigtet settling af 'vilde' muslinger.
  • Når der skal høstes trækkes sokken ombord fartøjet, hvor muslingerne mekanisk fjernes (fra det indre af sokken).
  • Linen renses maskinelt
  • Linen føres gennem en 'seedling'-maskine, som påfører linen ny muslingeyngel (settlings)
  • Linen påfører maskinelt en ny 'sok'
  • Linen sættes tilbage i havet

Altså har men et 'kontinuerligt reb'

Se eventuelt hjemmesiden fra New Zealandske "Quality Equipment", hvor der findes en billedserie (linket starter med foto nr. 11 - de første er firmapræsentation).


Skotske muslingeavlere vil nu afprøve metoden. Læs herunder en artikel fra FishUpdate (på engelsk):

Inverlussa Shellfish Company Ltd at Loch Spelve on Mull is conducting trials with the New Zealand 'continuous rope' system, which has the potential to make the complex harvesting operation more efficient.

At the moment most mussel cultivation in Scotland is achieved by growing the mussels on single ropes or fabric, suspended in the water by heavy horizontal ropes and flotation buoys. The new system involves continuous loops of special rope hanging down from the heavy horizontal ones, the total length of which can be up to 14 kilometres. This means that during harvesting, instead of pulling in many single individual ropes, the continuous loops can be drawn aboard the collection vessel and through the harvesting machine almost automatically.

In New Zealand this system has proved a fast and effective harvesting method, ensuring a consistent product with a minimal loss of shells.

Douglas Wilson of Inverlussa Shellfish, said: "It doesn't mean we will be able to grow more mussels, but in theory it should make the harvesting more efficient without the backbreaking part, also an added bonus is that the special rope is reusable year after year.

"The system works well in New Zealand and I believe some Irish mussel farmers have also had success with it. It would probably be too expensive for us to convert our whole farm to this method, but we are keen to trial it, and if successful, use it for part of our operation to begin with."

Inverlussa Shellfish, which is part of the Scottish Shellfish Marketing Group, has received European Fisheries Funding (EFF) to help finance the project.

Meanwhile, despite the recession, Inverlussa is experiencing a robust level of demand for its mussels.

Douglas Wilson says: "The health benefits of eating mussels have received much publicity and people are much more adventurous in their tastes than they used to be - and this seems to be helping to fuel demand."



 
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