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 |