Choosing this method, the aim is to establish a fish farm capable of growing and marketing any amount of Tilapia per year.
It will raise tilapia fish in earth ponds utilizing the advantages in the selected area.
Why Tilapia? and why in West Africa?
First and foremost, it is amongst the favorable fish worldwide. The demand for tilapia is much acceding supply and that why prices of tilapia remain high.
Another important advantage is the reproduction and production ability of the tilapia species. West Africa has extremely good conditions for raising Tilapia due to the quantity and quality of the water and due to optimal weather conditions all year round.
Tilapia is a native African fish; it is very resistant to disease and therefore ideal for the earth- pond or cages rearing system proposed in this project.
The increasing demands encourage many growers to enter into tilapia production worldwide. Tilapia belongs to the Cichlid family of fishes. It is one of the major groups of food fish around the world, especially in the tropical and semi-tropical areas. Tilapia has been called “Saint Peter’s fish” in reference to biblical passages about the fish fed to the multitudes.
Fry Production Process
Example for a system of Brood-stock and sex reversal: Three groups of brood-stock (parents) 400 females + 150 males which will produce 2.500.000 fry per year.
Breeding stock enter the production cycle of 14 days in the spawning ponds. After 14 days the fry are separated from their parents and transferred to the sex reversal ponds.
Way Sex reversal?
The process of sex reversal is accomplished by providing high quality feed with a male hormone supplement (testosterone) which changes the fry to 98% male. Duration of treatment: 25-30 days.
The “Hormone supplement” – It is come with portions of 10 kg of high quality fish feed (45% protein) mix with 0.6 gram of a male hormone (testosterone). To mix the hormone with the feed, we use 4 litter of alcohol which spread the very little hormone on the feed. Eventually the alcohol is evaporates and disappear.
Nursery: The fry after sex reversal are transferred into nursery ponds in two stages until they reach 50 grams.
Stage A – size of 1 gram – 20 gram in 50 days in a density of 200.000/Hact.
Stage B – size of 20 gram – 50 gram in 25 days in a density of 100.000/Hact.
Source : http://www.alphalapia.com/#!tilapia-fish-farm/c3u2