GUIDELINES FOR PLANNING SEED PRODUCTION OF AFRICAN MAGUR
| 1. BROODFISH MANAGEMENT | |
| Age of the broodfish suitable for artificial reproduction | 10 month |
| Average broodfish weight at first reproduction | 1,0 kg |
| Ratio of the female and male fish | 10:7 |
| Daily feeding of broodfish | 5–12 percent of body weight |
| Broodfish feed | |
Feed type I (Tk 5/kg) | 40% cattle blood 20% mustard oil cake 40% wheat bran |
Feed type II (Tk 10/kg) | 25% fish meal 30% mustard oil cake 45% wheat bran |
| Stocking density of broodfish | max. 400 kg/bigha |
| Separation of the sexes | before rainy season |
| 2. HATCHERY MANAGEMENT | |
| Breeding season | |
Peak season Season | March; April; May Through whole year |
| PG treatment | 5–7 mg/kg, in one dose |
| Latency period | at 20°C 21–22 hours |
| at 25°C 11–12 hours | |
| at 28°C 7–8 hours | |
| Egg production | 90 g/female |
| Fertilization rate | 60 % |
| Loss during incubation | 10 % |
| Quantity of eggs in one hatching tray (Surface area 1 m2) | 150 g |
| Incubation period | at 22°C 40 hours |
| at 25°C 28 hours | |
| at 28°C 22 hours | |
| Time of first feeding | 30–40 hours after hatching |
| 3. FINGERLING PRODUCTION IN PONDS | |
| Pond preparation | Dewatering |
| Liming | |
| Refilling 2 feet water | |
| Manuring (150–200 kg/bigha) | |
| Sumithion (0, 25 mg/l) or Dipterex (1,0 mg/l) treatment | |
| Preparation of shades with rice straw (surface 9–10 square feet each) | 25/bigha |
| Socking density | 1–2 lakh/bigha |
| Maintenance of plankton population | 5 kg/bigha MOC or manure daily, in the first ten days period |
| Feeding (5–6 feeding tray/bigha) | Daily ration 30–50% of body weight |
| (No feeding during the first week of rearing) | |
| Feed | Similar to broodfish feed |
| Harvesting | 2–3 weeks after stocking (at 1–2 inch size) |
| Survival | 40–60% |
| 4. ECONOMICS OF FISH SEED PRODUCTION IN PONDS | |
| Feeding of 100 broodfish | |
| (available for production of 7 lakhs of fingerling/year) | Tk 50–100/day, Tk 18 000–36 000/year |
| Expenses for pre-stocking pond management | ||
| (for 1,0 bigha pond area) | Pumping | Tk 500 |
| Lime | Tk 200 | |
| Manure | Tk 150 | |
| Chemical treatment | Tk 150 | |
| Shades | Tk 300 | |
| Expenses for post-stocking pond management | ||
| (for 1,0 bigha pond area) | Plankton maintenance | Tk 200 |
| Feeders | Tk 100 | |
| Fish feed | Tk 1800 | |
| Chemical treatment | Tk 500 | |
| Labour cost | Tk 500/bigha |
| Rental cost/amortization | Tk 100/bigha |
| Bank interest for one cycle | Tk 700 |
| Proportional expenses for broodfish management | Tk 1800 |
| Total cost | Tk 7000/bigha/cycle |
| Number of produced fish in one cycle | 70 000/bigha |
| Value of one fingerling (1–2 inch size) | Tk 1,0 |
| Income | Tk 70 000 |
| NET PROFIT OF ONE CYCLE OF FINGERLING PRODUCTION | Tk 63 000 |
5. FINGERLING PRODUCTION IN TROUGHS
| The size of troughs | 2.0 × 0.5 × 0.25 m |
| Water supply | 3–5 liter/minute |
| Daily treatment | Cleaning 5–6 times |
| Formalin bath 2–4 times (1ml/10 l water) | |
| Antibiotic 0–3 times | |
| (1–2 teaspoon/treatment) | |
| Stocking | 1st week 50 000 |
| 2nd " 20 000 | |
| 3rd " 8 000 | |
| 4th " 6 000 | |
| Feeding | Starter food Artemia or poultry egg Rearing food Tubifex |
6. ECONOMICS OF FISH SEED PRODUCTION IN TROUGHS
| Production cost of 7–8 000 newly hatched fry | Tk 250 |
| Chemical treatment | Tk 900 |
| Feeding | Tk 1000 |
| Labor | Tk 200 |
| Amortization | Tk 100 |
| TOTAL | Tk 2450 |
| Value of produced fish | Tk 4550 |
| NET PROFIT | Tk 2100/trough/cycle |
