Norwegian salmon farming Monitoring and research Sten Karlsson - - PowerPoint PPT Presentation

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norwegian salmon farming monitoring and research
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Norwegian salmon farming Monitoring and research Sten Karlsson - - PowerPoint PPT Presentation

Jun 13, 2023 711 likes •822 views

Norwegian salmon farming Monitoring and research Sten Karlsson Norwegian Salmon farming Slaughtered farmed salmon metric tons 1.2 Million Tons Farmed salmon 1400000 1200000 1000000 N Escapees - Official reports 800000 600000 1000000

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Norwegian salmon farming – Monitoring and research

Sten Karlsson

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www.nina.no

Norwegian Salmon farming

200000 400000 600000 800000 1000000 1200000 1400000 1993 1995 1997 1999 2001 2003 2005 2007 2009 2011 2013 2015 2017

Slaughtered farmed salmon metric tons

1.2 Million Tons Farmed salmon ~500 000 wild salmonrun

100000 200000 300000 400000 500000 600000 700000 800000 900000 1000000

N Escapees

N Escapees - Official reports

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www.nina.no

Nowegian wild salmon

  • About 400 salmon rivers
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www.nina.no

Farmed escapees

First generation monitoring programme: 1989 - 2013 Second generation monitoring programme: 2014 - 2017

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www.nina.no

Farmed to wild genetic introgression

Finding genetic markers (SNPs) that generically differentiate between Norwegian wild and farmed salmon

  • Coord. 2
  • Coord. 1

Farm Wild Wild

..P(wild)

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www.nina.no

Farmed to wild genetic introgression

▪ 16 407 samples adult salmon ▪ 5155 samples of juveniles ▪ 109 populations ▪ Significant introgression in 51 (47%) ▪ Average introgression 6.4%, Range 0 – 42% ▪ Highest introgression in the most farming intensive regions

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www.nina.no

Farmed to wild genetic introgression

No genetic changes observed Weak genetic changes indicated Moderate significant genetic changes Large significant genetic changes

175 populations evaluated

60 54 11 50 60 / 34% 54 / 31% 11 / 6% 50 / 29% quality norm for wild Atlantic Now about 40 000 individuals from about 240 populations

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www.nina.no

Consequences

  • Atlantic Phylogenetic grouo

 3350 individuals  22 Large-salmon rivers  26 Small-salmon rivers

  • Barents/White Sea –

Phylogenetic group

 751 individuals  6 Large-salmon rivers  8 Small-salmon rivers

Large effect on Sea-age and growth

  • Different effect in males

and females

  • Different effect in large

and small salmon rivers

  • Phylogenetic origin

matters - Different effect in the Atlantic and the Barents/White Sea Phylogenetic groups

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www.nina.no

  • Foto. A. Staverløkk

Samarbeid og kunnskap for framtidas miljøløsninger