🌾 Why Empurau & Patin?
- Empurau (Tor tambroides)** — prized as “The King of River Fish”, fetching RM 600–800/kg due to its delicate flesh and natural fruit‑based diet.
- Patin (Pangasius spp.)** — fast‑growing, affordable, and widely consumed across Malaysia, with strong demand in local markets and restaurants.
Together, they balance premium export potential (Empurau) with steady domestic demand (Patin).
🏞️ Earthen Pond Advantages
Earthen ponds are the backbone of Sarawak aquaculture:
- Lower construction cost compared to concrete tanks.
- Natural soil filtration and microbial activity improve water quality.
- Stable temperature buffering in tropical climates.
- Flexible integration with agro‑ecosystems (vegetables, livestock effluent recycling).
🧱 Pond Design Essentials
| Feature | Recommended Specification | Purpose |
|---|---|---|
| Size | 0.1–0.5 ha | Easier management and aeration. |
| Depth | 1.2–1.8 m | Prevents overheating and oxygen depletion. |
| Slope | 1:3 | Facilitates drainage and harvesting. |
| Inlet/Outlet | PVC/concrete pipes with screens | Controls water flow, prevents escapes. |
| Bottom Drain | Central or side outlet | Enables sludge removal. |
💧 Water Quality Management
- Temperature: 26–30 °C
- pH: 6.5–8.0 (adjust with lime)
- DO (Dissolved Oxygen): > 5 mg/L (use paddle‑wheel aerators)
- Ammonia: < 0.1 mg/L (avoid overfeeding, remove sludge)
- Water Exchange: 20–30% weekly
🍽️ Feeding Strategy
Empurau
- Juveniles: high‑protein pellets (40–45%).
- Adults: supplement with fruits (figs, palm fruits) and aquatic plants.
- Feed twice daily, avoid excess to maintain water quality.
Patin
- Juveniles: floating pellets (30–35% protein).
- Grow‑out: carbohydrate‑rich balanced feed.
- Target FCR (feed conversion ratio) < 1.5 for profitability.
⚙️ Stocking & Growth
| Species | Density | Culture Period | Harvest Size |
|---|---|---|---|
| Empurau | 2–3 fish/m² | 18–24 months | 1–2 kg |
| Patin | 5–8 fish/m² | 6–8 months | 1–1.5 kg |
🧪 Health & Biosecurity
- Quarantine new fingerlings for 7 days.
- Apply probiotics monthly to stabilize pond microbiota.
- Monitor for parasites (Argulus, Trichodina) via microscope checks.
- Avoid antibiotics — rely on water management and nutrition.
💰 Economic Snapshot
| Item | Empurau | Patin |
|---|---|---|
| Market Price (2026) | RM 600–800/kg | RM 12–18/kg |
| Feed Cost Share | ~45% | ~55% |
| Profit Margin | 35–40% | 25–30% |
Empurau farming requires patience but yields exceptional returns; Patin offers faster turnover and reliable cash flow.
🌿 Sustainability Tips
- Integrate rainwater harvesting to reduce water costs.
- Use organic pond fertilization (composted manure) to stimulate plankton.
- Recycle pond sludge for vegetable plots.
- Promote community hatcheries for quality seed supply.
🏁 Closing Note
Earthen pond aquaculture for Empurau and Patin is a high‑value opportunity for Sarawak farmers. With proper pond design, water quality management, and feeding discipline, farmers can achieve sustainable yields while preserving biodiversity.
