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

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Summary for Germany (2017)
TotalProduction (t)Percent of total
fish production %
Estimated Numbers
(millions)
All species with an EMW
(Estimated mean weight)
         14,22275 7 - 34
All species without an EMW          4,82125Not estimated
Total fish production         19,043100
out of total aquaculture production         35,979

   

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Data for Germany (2017)
SpeciesProduction (t)1Estimated
mean weight2,5
(EMW) g
EMW id2Estimated
Numbers
(millions)3
Rainbow trout          8,452373-1,826155 5 - 23
Common carp          4,597500-2,50057 2 - 9
Chars nei          1,777 Not estimated4
European eel          1,202 Not estimated4
North African catfish          1,061500-1,500132 1 - 2
Sea trout            662 Not estimated4
Freshwater fishes nei            580 Not estimated4
Sturgeons nei            183 Not estimated4
Wels(=Som) catfish            181 Not estimated4
Tench            134 Not estimated4
Tilapias nei            112250-800215 <1
Pike-perch             55 Not estimated4
Northern pike             47 Not estimated4
 
Totals by estimate type:
Production (t)Percent of
total fish
production %
Estimated Numbers
(millions)
   Single species with an EMW          14,11074 7 - 34
   Multi species with an EMW             1121<1
Totals for species with an EMW         14,22275 7 - 34
Totals for species without EMW          4,82125 Not estimated4
Total fish production         19,043100
out of total aquaculture production         35,979

Estimated by A Mood and P Brooke, Sep 2019.   Updated Nov 2019 for Rainbow trout, see note 5 below.


Notes
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.
5. For rainbow trout, a weighted estimated mean weight has been used based on the proporation of small rainbow trout (< 1200g) and large rainbow trout (> 1200g) produced in the country, if available. See FEAP data.
(The estimated mean weight (EMW) for rainbow trout is 210-5000g and the EMWs for small and large rainbow trout are therefore respectively 210-1200g and 1200-5000g.)
Global estimated numbers for rainbow trout based on these weighted estimated mean weights total 268-3072 million individuals as compared to 162-3865 million based on the (unweighted) estimated mean weight of 210-5000g.