spawning tilapia hatchery different .ppt

different systems for tilapia hatcheries

1. Tilapia hatchery
operation
Dr Waleed El Hawarry

3. •The culture system in Egypt and
throughout most of the tilapia
producing countries is one of
monosex culture via sex reversal using
a 3-phase production system
employing reproductive, nursery and
final growout cycles.
•Generally, only large farms can afford
to have hatchery and nursery phases
and generate an excess of fry or
fingerlings for sale to smaller farms.

4. Fingerlings 8-
20 g
70-80 d

5. Reproductive phase:
•Fry are necessary inputs in
aquaculture operations.
•Fry for freshwater Nile tilapia, as well
as others, are produced in
hatcheries.

6. Definitions
•A hatchery is a 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

7. 22/10/2008 Dr Waleed El-Hawarry
Male papilla
Female papilla with
oviduct
anus
anus
Visual Selection of the Genital PapillaVisual Selection of the Genital Papilla

8. 1. Early in one
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.

9. •3. A female 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

10. 5. The female
picks up eggs
and sperm strings
and fertilization
occurs in her
month.

11. Females incubate eggs

12. Tilapia guarding frys

13. 1. ponds
2. cages (hapas)
3. tanks
Tilapia can be spawned in:Tilapia can be spawned in:

14. 1. Partial harvested
2. Completely harvested
Fry can be:Fry can be:

15. 2. 40 days after
stocking brood fish
1. 18 days after
stocking brood fish
Fry can be harvested:Fry can be harvested:

16. Tilapia Spawning ponds

17. Collecting Tilapia frys

18. Collected Tilapia frys

19. Collected Tilapia frys

20. Nile tilapia nests

21. Collecting Tilapia frys

22. Collecting Tilapia frys

23. Collecting Tilapia frys

24. Tilapia Spawning hapas

25. Tilapia Spawning hapas

26. Hapa

29. Incubating tilapia eggs
Yolk-sac tilapia fry
Eggs can be removed from females:Eggs can be removed from females:

30. Collecting Tilapia eggs
and frys

31. Collecting Tilapia eggs
and frys

32. Checking female for
eggs

33. Female holding eggs

34. Egg incubators

35. Tilapia sac fry
incubation

36. Tray holding sac fry

37. Grading of fry

38. Oversized Tilapia seeds

39. Yolk sac fry

40. Sex reversal of fry

41. Sex reversal of fry

42. Indoor tanks
For sex reversal of fry

43. Sex reversed fry

44. Harvested mixed sex
Nile tilapia

45. Harvested mixed sex
Nile tilapia

46. ponds protected from
bird predation

47. ponds protected from
bird predation