Tilapia fingerlings production
Spawning .1 •
Systems for all male population .2 •
Hand sexing
•
Hybridization
•
Hormonal sex inversion
•
Planning of fingerling production •
Spawning
• Spawning pond
Depth – 1-1.5m
Drainable
Sex ratio – 1male 3-6 females
Density 5-10 females/m2
Cycle duration – 16-30 days (up to
the
method).
Tilapia sexes
Male
•
•
Female
All male progeny - HYBRIDIZATION
male O.aureus ZZ
female – O.niloticus XX •
(F1) Males only ZX
•
All males – Hormonal sex inversion
• Fry collection – 11 mm length (3mm net)
Stocking in tanks, ponds, happas….. •
Feeding Hormone enriched feed for 28 days •
Success assessment 3-5 gr’ •
Feed preparation •
60 mg Hormone (ET, MT) for 1 kg feed •
Hormone dissolved in ethanol – Spray/mix with •
feed
Drying till ethanol evaporates •
Security measurements should be taken •
‫כלובי רשת להיפוך זוויג‬
Happa cage for Sex inversion
Density – 5000-20000/m3
Brood stock production (for “all male”)