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

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Summary for Netherlands (2017)
Total Production (t) Percent of total
fish production % Estimated Numbers
(millions)
All species with an EMW
(Estimated mean weight)           3,050 57 2 - 6

All species without an EMW           2,300 43 Not estimated

Total fish production           5,350 100

out of total aquaculture production          61,600

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Data for Netherlands (2017)
Species Production (t)¹ Estimated
mean weight²
(EMW) g EMW id² Estimated
Numbers
(millions)³
European eel           2,100 Not estimated⁴

Freshwater fishes nei              70 Not estimated⁴

North African catfish           2,900 500-1,500 132 2 - 6

Pike-perch              10 Not estimated⁴

Rainbow trout              50 210-5,000 155 <1

Soles nei              20 Not estimated⁴

Sturgeons nei              50 Not estimated⁴

Turbot             100 700-2,000 219 <1

Yellowtail amberjack              50 Not estimated⁴

Totals by estimate type:

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

   Single species with an EMW           3,050 57 2 - 6

Totals for species with an EMW           3,050 57 2 - 6

Totals for species without EMW           2,300 43 Not estimated⁴

Total fish production           5,350 100

out of total aquaculture production          61,600

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
European eel	2,100			Not estimated⁴
Freshwater fishes nei	70			Not estimated⁴
North African catfish	2,900	500-1,500	132	2 - 6
Pike-perch	10			Not estimated⁴
Rainbow trout	50	210-5,000	155	<1
Soles nei	20			Not estimated⁴
Sturgeons nei	50			Not estimated⁴
Turbot	100	700-2,000	219	<1
Yellowtail amberjack	50			Not estimated⁴

Totals by estimate type:
	Production (t)	Percent of total fish production %		Estimated Numbers (millions)
Single species with an EMW	3,050	57		2 - 6
Totals for species with an EMW	3,050	57		2 - 6
Totals for species without EMW	2,300	43		Not estimated⁴
Total fish production	5,350	100
out of total aquaculture production	61,600