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

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Summary for Chad (2017)
TotalProduction (t)Percent of total
fish production %		Estimated Numbers
(millions)
All species with an EMW
(Estimated mean weight)		            35081 <1 - 1
All species without an EMW             8019Not estimated
Total fish production            430100
out of total aquaculture production            450

   

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Data for Chad (2017)
SpeciesProduction (t)1Estimated
mean weight2
(EMW) g		EMW id2Estimated
Numbers
(millions)3
Hatcheria macraei             80 Not estimated4
Nile tilapia            200250-800129 <1 - 1
North African catfish            150500-1,500132 <1
 
Totals by estimate type:
Production (t)Percent of
total fish
production %		Estimated Numbers
(millions)
   Single species with an EMW             35081 <1 - 1
Totals for species with an EMW            35081 <1 - 1
Totals for species without EMW             8019 Not estimated4
Total fish production            430100
out of total aquaculture production            450

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.