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

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Summary for Switzerland (2017)
Total Production (t) Percent of total
fish production % Estimated Numbers
(millions)
All species with an EMW
(Estimated mean weight)           1,360 78 <1 - 6

All species without an EMW             373 22 Not estimated

Total fish production           1,733 100

out of total aquaculture production           1,733

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Data for Switzerland (2017)
Species Production (t)¹ Estimated
mean weight²
(EMW) g EMW id² Estimated
Numbers
(millions)³
Chars nei               6 Not estimated⁴

European perch             305 Not estimated⁴

Nile tilapia              60 250-800 129 <1

Rainbow trout           1,300 210-5,000 155 <1 - 6

Sea trout              40 Not estimated⁴

Sturgeons nei              22 Not estimated⁴

Totals by estimate type:

Production (t) Percent of
total fish
production % Estimated Numbers
(millions)

   Single species with an EMW           1,360 78 <1 - 6

Totals for species with an EMW           1,360 78 <1 - 6

Totals for species without EMW             373 22 Not estimated⁴

Total fish production           1,733 100

out of total aquaculture production           1,733

Estimated by A Mood and P Brooke, Sep 2019

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.

Species	Production (t)¹	Estimated mean weight² (EMW) g	EMW id²	Estimated Numbers (millions)³
Chars nei	6			Not estimated⁴
European perch	305			Not estimated⁴
Nile tilapia	60	250-800	129	<1
Rainbow trout	1,300	210-5,000	155	<1 - 6
Sea trout	40			Not estimated⁴
Sturgeons nei	22			Not estimated⁴

Totals by estimate type:
	Production (t)	Percent of total fish production %		Estimated Numbers (millions)
Single species with an EMW	1,360	78		<1 - 6
Totals for species with an EMW	1,360	78		<1 - 6
Totals for species without EMW	373	22		Not estimated⁴
Total fish production	1,733	100
out of total aquaculture production	1,733