Download as PDF, PPTX
More Related Content
Tilapia hatchery operation.pdf
- 1. Tilapia hatchery operation Dr WaleedEl Hawarry
- 2. Definitions • A hatchery isa facility for breeding fish to produce fry and fingerlings for grow-out. • Fry are the very young tilapia soon after hatching. • Fingerlings are juveniles 1–3 g in weight that have completed a nursery phase of culture and are ready to be stocked into grow-out ponds. • Grow-out is stocking tilapia fingerlings into ponds and feeding them until they are big enough to be eaten or sold
- 3. 22/10/2008 Dr WaleedEl-Hawarry Male papilla Female papilla with oviduct anus anus Visual Selection of the Genital Papilla
- 4. 1. Early inone afternoon, the dominant male begins to clean the spawning area that he guards. 2. The male displays his reflective side to females and induces their final ovary maturation.
- 5. • 3. Afemale with mature follicles enters the dominant male's spawning area and cleans the area with him. • 4. The male and the female communicate through body vibration while discharging gamete
- 6. 5. The female picksup eggs and sperm strings and fertilization occurs in her month.
- 7.
- 8.
- 9. 1. ponds 2. cages(hapas) 3. tanks Tilapia can be spawned in:
- 10.
- 11. 2. 40 daysafter stocking brood fish 1. 18 days after stocking brood fish Fry can be harvested:
- 12. 1. Partial harvested 2.Completely harvested Fry can be:
- 13. Incubating tilapia eggs Yolk-sactilapia fry Eggs can be removed from females:
- 14.
- 15.
- 16.
- 17.
- 18.
- 19.
- 20.
- 21.
- 22.
- 23.
- 24.
- 25.
- 26.
- 27.
- 28.
- 29.
- 30.
- 31.
- 32.
- 33.
- 34.
- 35.
- 36. Indoor tanks For sexreversal of fry
- 37.
- 38. Harvested mixed sex Niletilapia
- 39. Harvested mixed sex Niletilapia
- 40. ponds protected from birdpredation
- 41. ponds protected from birdpredation