2. Fresh Water Species
яБ╢Fresh water prawns of the genus
Macrobrachium are very suitable for
intensive culture.
тАв Macrobrachium malcomsonii (Rivers)
тАв Macrobrachium birmanicum
тАв Macrobrachium rude
тАв Macrobrachium idae (Ponds)
3. Classification of fresh water prawn
Macrobrachium rosenbergii
тАв Kingdom
тАв Phylum
тАв Subphylu
m
тАв Class
тАв Order
тАв Sub-order
тАв Infraorder
тАв Superfami
ly
тАв Family
тАв Subfamily
тАв Genus
:
:
:
:
:
:
:
:
:
:
:
:
Animalia
Arthropoda
Crustacea
Malacostraca
Decapoda
Pleocyemata
Caridea
(Natantia)
Palaemonoidea
Palaemonidae
Palaemoninae
Macrobrachium
rosenbergii (giant river prawn)
4. Identityandmorphology
яГШ The adult Macrobrachiumrosenbergii can easily be
identified from other species in the genus by the
following characteristics:
тАв Adult malehasapair of verylonglegs (chelipeds)
тАв Therostrumislongandbent in the middlewith 11тАУ13
dorsal teeth and 8тАУ10 ventral teeth
тАв The movablefingerof the legof the adult maleis
covered by a dense mat of spongy fur
тАв Distinctblackbandsonthe dorsalsideat the
junctions of the abdominal segments
10. Prawn hatchery
тАв The hatchery building is usually associated with
the nursery tanks and grow-out ponds in terms of
water supply and other requirements.
тАв A freshwater prawn hatchery produces PL for
growing out in ponds and for sale to other prawn
grow-out enterprises.
11. Farming of Fresh Water Prawn
тАв Fresh Water Culture are depend upon
following things:
1) Location of farm
2) Pond Construction
3) Crop Species & Feeding
4) Stocking
5) Management
6) Harvesting
12. Water quality
тАв Freshwater from a river, stream or lake, rainwater,
or groundwater can be used.
тАв Hardness (as CaCO3) should be in the range
50тАУ 100 ppm.
тАв Seawater is needed to mix with the freshwater to
produce brackish water for the larvae.
тАв The seawater is disinfected with 10 ppm of calcium
hypochlorite and stored for at least a week before
use.
13. Pond Construction
тАв Ponds range in size from 1-10 acres
тАв 4-7 feet deep
тАв Gentle bottom slope
тАв Well maintained level
16. Growthtomaturity
тАв The PL grow to maturity within 4тАУ7
months in freshwater ponds.
тАв The PL grow to maturity is
depending on temperature, food
and environmental conditions.
тАв The maturity stages of females and
male can be determined by external
examination of the ovary, and testis.
19. Harvesting
тАв Harvest in October month
тАв Drain and seine pond net
тАв Direct market or sell to
processor
тАв Store after dry
20. SOME CURRENT
PROBLEMS
тАв Culture mostly dependent on rain
water; no assured perennial water
supply or drainage network.
тАв Available commercial feeds are
either of inadequate quality or are
too expensive.
тАв Poor nursery practices.
тАв Declining wild brood-stock population
due to over-fishing.