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