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:pen: PEN SYSTEM MANGROVE FOREST (MUD CRAB CULTURE) (CULTURE PRACTICES…
:pen: PEN SYSTEM
MANGROVE FOREST
(MUD CRAB CULTURE)
POTENTIAL
eco-tourism
sustainability
crab captured fisheries
(natural re-seeding)
CULTURE PRACTICES
feeding
~ chopped trashed fish
~natural feed eg molluscs
water management
~ :check: high tide :natural flow of salt
:check: neap tide: water pump
harvest method
~ :red_flag: during spring tide
:red_flag: new harvest gear 150crab/ trap
:red_flag: traditional 2-5 crab/trap
sp
~
S. tranquebarica. S. paramamosain
most common ~
S. olivacea
culture period~ :checkered_flag: 4month (from 100gm)
:checkered_flag: 7month (from larvae)
:checkered_flag:market size 300gm/crab @ 3crab/kg
:checkered_flag:70% recovery rate
:checkered_flag: 30% remain% mortility
stocking rate
~ :no_entry: 2.5 crab/ m2 (medium rate)
:no_entry: natural restocking
:no_entry: seed weight 100-150gm/crab
DESIGN &
STRUCTURE
:!!:pen dimension~ 10mX20m
:!!:fencing~ wooden plank strips (lower fence)
:!!:HDPE netting (upper fence)
:!!:fence support by 3m vertical post & 3 level horizontal support
:warning: ever lasting
:warning: low maintenance cost
~within mangrove (eco-friendly)
~within inter-tidal zone (critical for success of culture)
INTRODUCTION
:explode: start culture in Sarawak 1980
:explode: culture technology have been adapted in other ASEAN (Philiphine Vietnam Thai)
:explode: improved through R&D (2000-2003)
:explode:crab fattening in floating cage
:explode: crab grow-out in pond
BENEFIT
:recycle: promotes natural growth of mangrove tree
:recycle: breeding & spawning within crab pens
:recycle: natural restocking
:recycle: natural reseeding
:recycle:increase wildstock
:recycle: eco-friendly
ORGANIC AQUACULTURE
STANDARD
1) eliminates risk of disease transfer
2) wildlife not harmed
3) :forbidden: antibiotic
4) :forbidden: GE, GMO
5) waste not released to environment
MAIN CHALLENGE
crab seed
hatchery seed:
long term solution
captured fisheries:
short term solution
cost
total RM120K
rate of return in 3years