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Screen 4: Reference data detail for: EMW-21 (reference id: 2 )

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EMW idEMW ref. idFAO species categorySpeciesScientific nameLower EMW (g)Upper EMW (g)Reference indicates lower or upper EMW figure?EMW MethodLength-weight calculations*** Fish Size Quote ****** Explanatory Notes ***CountryLink to reference (external site)Reference documentReference urlLink to FishBase.org Species Summary (external site)
EMW-212Atlantic salmonAtlantic salmonSalmo salar3,614.008,434.00BothWeight or weight rangeNONEP21 "The most normal market size for a salmon is 4-5kg and 5-6kg HOG, making up about 60% of the production in Norway. There are also produced significant volumes of 3-4kg and 6-7kg fish, and less 1-3kg and 7+ fish. The reason for the different sized fish is mainly that salmon farming is a biological production process, where the fish has different growth cycles and the biomass represents a normal distributed size variation. When produced, this is being adjusted by sorting the fish once or twice into groups of equal size. However, this is expensive and not optimal for the fish due to extra stress caused by handling."

P15 "In Chile there has been a tremendous growth in farming of Atlantic salmon the last decade, before growth and production was reduced after 2006, caused by biological challenges. The mortality in Chile increased rapidly as a result of outbreak of ISA [Infectious Salmon Anaemia], and the average harvest size of the fish went down which resulted in a lower yield per smolt (in kg) ? While the average yield per smolt in Norway was 3.67 kg (HOG) in 2008, the same number was 1.33 kg (HOG) in Chile."
It is assumed the great majority if farmed salmon in Norway fall into the range 3-7 kg HOG.

"HOG" means head on gutted. An assumed conversion rate between HOG weigth and live weight is given on p53: "Conversion rate from Live Weight to HOG: 0.83". Using this conversion weight, the 3-7 kg HOG weight range is equivalent to 3614-8424g.
NorwayMore info.Marine Harvest Salmon Industry Handbook 2010More infoMore info.

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