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Labeo rohita / Rohu

 Rohu / Labeo rohita

Labeo rohita

 

Rohu is a representative of the carp family and is wonderfully suitable as a fish for aquaculture, as this herbivorous fish allows for a combination of farming with prawns. Although this requires larger tanks and increased effort, it ensures a higher yield. It can be combined excellently with the giant river prawn. Since it belongs to the cyprinids, it is possible to obtain the organic label certificate, the same applies to the prawns. Rohu grows quickly and can be harvested after just 18 months at a weight of 1.5 kg. In this cycle, it is possible to complete up to three prawn cycles. It is especially popular in the Asian region and must be introduced carefully to the European market.

 

 

 

 

 
Fact Sheet
 Rohu
 
Latin name Labeo rohita
Order, Family Cypriniformes, Cyprinidae
Occurrence Rivers and lakes in South and Southeast Asia
Habitat Flowing waters
Size / Weight  up to 200 cm / max. 45 - 100 kg
Life expectancy 10 years
Stocking density 200 kg/m3 (1 (bd
Temperatures 25 - 290 Celsius 
pH range 8.2 - 8.8  (show suitable plants)
Oxygen min. 5.12 mg/l
Water hardness 30° dGH (dGH
NO2 (Nitrite) min. 40 mg/l
NO3 (Nitrate) min. 90 mg/l
Growth up to 800 g after 12 months
FCR 1.2 - 2.0
Harvesting From 1 - 1.5 kg after 12 - 18 months
Food type Herbivore
Prefers Aquatic plants, phytoplankton (at older age)
Certification depends on country
ASC / Organic seal EU organic label for cyprinid fish available
ASC requirements not available
Feed Rohu carp are herbivorous fish and should therefore mainly receive feed based on algae and plants, although zooplankton and phytoplankton can also be administered.
Recommendation  

 

Sources:

https://de.wikipedia.org/wiki/Labeo_rohita
https://www.aquariumforum.de/threads/31569-diskussion-nitrit-und-grenzwert
https://sciencenotes.de/die-quadratur-des-kreislaufs/
https://www.fischlexikon.eu/fischlexikon/fische-suchen.php?fisch_id=0000000494
https://www.fao.org/fishery/affris/species-profiles/roho-labeo/growth/en/#:~:text=The%20fish%20are%20reared%20for,g%20in%20the%20third%20year.
https://thefishsite.com/articles/cultured-aquatic-species-roho-labeo#:~:text=The%20usual%20harvestable%20size%20of,per%20cent%20of%20the%20biomass.
https://www.isroset.org/pub_paper/IJSRBS/15-IJSRBS-01180.pdf

 

bd) Stocking densities according to EU regulations for organic aquaculture:

15 kg/m³ Brook trout (Salvelinus fontinalis)
15 kg/m³ Whitefish (Coregonus)
15 kg/m³ Trout (Oncorhynchus, Trutta)
20 kg/m³ Arctic char (Salvelinus alpinus)
25 kg/m³ Brook and rainbow trout
20 kg/m³ Salmon: Brown trout (Salmo trutta fario), Lake trout (Salmo trutta lacustris), Sea trout (Salmo trutta trutta), Rainbow trout (Oncorhynchus mykiss)
10 kg/m³ Milkfish (Chanos chanos)
10 kg/m³ Tilapia (Oreochromis sp.)
10 kg/m³ Mekong catfish (Pangasius sp.)
Quote: Requirements include compliance with the prohibition of water quality deterioration (2) (in accordance with Directive 2000/60/EC European Water Framework Directives), as well as an oxygen saturation of at least 7mg/L and a minimum inflow rate of 3 liters per second per ton of fish. Under no circumstances should animals show injuries (e.g., to fins) indicating excessive stocking density. Tropical freshwater fish (e.g., Milkfish Chanos chanos, Tilapia Oreochromis sp., Mekong catfish Pangasius sp.): the stocking density must not exceed 10 kg/m3 as an upper limit in ponds and net enclosures (pens, enclosures). 
 
Stocking density regulation EU: COMMISSION REGULATION (EC) No 710/2009 of 5 August 2009
 

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