Large Smolts in Salmon FarmingRagnar Joensen, Group Manager Technology MH ASA

Reykjavik – Nov 25th, 2016

Sjávarútvegsráðstefnan 2016, Hörpu, 24.-25. nóvember.

New production systems – closed or more exposed?

2

Present smolt production

Closed on land or in sea

Open as today or more exposed

Present smolt production Closed production on land or in sea

Present smolt production

Open production as today or more exposed

0 – 150 g 150 g – 1 kg 1 – 5 kg

Production time in sea decreases with larger smolts – 1 kg vs 70 g

14/09/16 Marine Harvest / Ragnar Joensen3

16 – 20 months

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2 000

4 000

6 000

8 000

01.05.2015 09.08.2015 17.11.2015 25.02.2016 04.06.2016 12.09.2016 21.12.2016

9 - 11 months

Less exposure in open systems:• Sealice• ISA• PD• CMS

Closed farming in Marine Harvest

Increased smolt size with RAS systems

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0

2000

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6000

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10000

12000

14000

16000

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2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021

Bio

mas

s (t

on)

Smol

t wei

ght (

g) a

nd n

mb

of sm

olt (

M)

Biomass Weight Nmb smolt

74 M

Marine Harvest Norway results with large smolt groups

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Smoltsize (g) RGI bFCR86 99 1,0688 99 1,0988 98 1,0592 95 1,09143 100 1,06556 114 1,07

Heggvika to harvest

Smoltsize RGI Mortality (%)118 102 1,56145 97 1,43147 100 1,44155 96 1,21408 122 1,04

Åkre 90 days

Postsmolt in sea

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Floating semi-closed tank at Marine Harvest Norway site “Molnes”

The tank is 21 000 m3, water being pumped in from 30 m depth to prevent sealice and stabilizing temperature

Postsmolt on land - Laxa MH Faroes

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• 2.8 mill fish annually á 650 g• Shorter production cycle 24 → 18 months• Same #fish – less exposure time• 4000 tonnes extra production – EV 25 NOK/kg

Large smolt production in theFaroes

More even smolt stocking through the year

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Smol

tsto

ckin

gpe

r mon

th (%

)

Smoltsize is increasing in Faroes (especially in Hiddenfjord)

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Smol

tsiz

e(g

)

Decreased production time to 6 kg gw

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Prod

uctio

n tim

e (d

ays)

Increased harvest volume

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Har

vest

vol

ume

(MT)

Production protocol of large smolts

Production protocol of large smolts

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Salinity• Faroes - only in FW• Norway - FW and SW

Light regime• Traditional 12:12 and 24:0 for 6 + 6 weeks• Newest: 24:0 in RAS and with salinity

Water quality parameters

R&D leading to optimal production protocol

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