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Estimated numbers of individuals in aquaculture production (FAO) of fish species (2017)

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Summary for Japan (2017)
TotalProduction (t)Percent of total
fish production %
Estimated Numbers
All species with an EMW
(Estimated mean weight)
        232,93482 267 - 437
All species without an EMW         51,52618Not estimated
Total fish production        284,460100
out of total aquaculture production      1,021,580


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Data for Japan (2017)
SpeciesProduction (t)1Estimated
mean weight2
(EMW) g
EMW id2Estimated
Ayu sweetfish          5,053 Not estimated4
Bastard halibut          2,300800-1,50026 2 - 3
Coho(=Silver) salmon         15,600 Not estimated4
Common carp          3,015500-2,50057 1 - 6
Freshwater fishes nei            152 Not estimated4
Japanese amberjack        139,2003,500-6,00099 23 - 40
Japanese eel         20,922100-250100 84 - 209
Japanese jack mackerel            800 Not estimated4
Marine fishes nei          2,900 Not estimated4
Pacific bluefin tuna         15,900 Not estimated4
Rainbow trout          4,797210-5,000155 1 - 23
Silver seabream         62,700400184 157
Tiger pufferfish          3,800 Not estimated4
Trouts nei          2,921 Not estimated4
White trevally          4,400 Not estimated4
Totals by estimate type:
Production (t)Percent of
total fish
production %
Estimated Numbers
   Single species with an EMW         232,93482 267 - 437
Totals for species with an EMW        232,93482 267 - 437
Totals for species without EMW         51,52618 Not estimated4
Total fish production        284,460100
out of total aquaculture production      1,021,580

Estimated by A Mood and P Brooke, Sep 2019

1. Source of production tonnage: FAO FishStat "Aquaculture Production (Quantities and values) 1950-2017 (Release date: 25th March 2019)".
2. Source of estimated mean weights (EMWs) : as for our earlier estimate, see Estimating the Number of Farmed Fish Killed in Global Aquaculture Each Year.
3. The estimated numbers are calculated as the production tonnage divided by estimated mean weight (EMW) where a mean weight has been estimated for the species.
4. The fish numbers for species without an estimated mean weight (EMW) have not been estimated for each individual species or country.