Brattland Multifeeder - Subsea feeding reduces lice infestation

Foto/illustrasjon - Brattland Multifeeder - Subsea feeding reduces lice infestation

Tests on a commercial scale with the latest model show a reduction in the number of treatments of up to 75%. Good performance in both growth and feed conversion ratio.

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Without extension pipe - feeding at approximately 3.5m
3m extension pipe - feeding at approximately 6.5m
4m extension pipe - feeding at approximately 7.5m
6m extension pipe - feeding at approximately 9.5m
8m extension pipe - feeding at approximately 11.5m
10m extension pipe - feeding at approximately 13.5m
12m extension pipe - feeding at approximately 15.5m
Rotor spreader
Smolt kit for rotor spreader
Quattro spreader 5-12mm pellets

Underwater feeding combined with a lice skirt provides a significant reduction in sea lice infestation. Results from the latest Multifeeder model show reductions of up to 75% in lice infestation and the number of treatments.

Comparisons between surface feeding and underwater feeding indicate equally good results in both feed conversion ratio and growth.

Why feed salmon deeper? Relevant topics:

Subsea feeding from 3m to 15.5m depth

  • Allows the fish to feed deeper, reducing lice infestation and the number of treatments.
  • Excellent performance in both feed conversion ratio and growth with the 2023 model.
  • The upper part is soundproofed, ensuring nearly silent feeding.
  • Blower pressure during feeding can be reduced by up to 50%, saving both hoses and energy consumption.
  • No wind drift of the feed.
  • Prevents feed from straying in the upper water layers due to strong currents.
  • By using a skirt, feeding can occur under the skirt edge, thus not depleting oxygen in the upper
  • water layer due to feeding activity.
    Improved water quality in the upper water layer as the feed is released where water exchange occurs, carrying away any fat and debris with the current.
  • The 4x4m base frame provides extremely good feed control with a central dosing unit in the middle.
  • Can be directly switched to water feeding without modifications.
  • Controlled feeding in poor weather.
  • Only a 40cm lift height for the feed into the cyclone requires minimal blower pressure.
  • Good results in both smolt feeding and larger fish with the subfeeder.
  • Does not require bird nets for larger fish.
  • Seagulls are absent, and the stress level in the fish decreases, as it is not possible for them to access the pellets.

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