LEARN HOW TO HATCH FISH EGG

AIM OF THE PRACTICAL
The major objective of the practical is to
(1)Empack the knowledge of artificial induced breeding to learners and beginers.
(2)For learners to know that is better and more reliable because (i) better rate of fertilization and hatching will be achieved.(ii) protection against enemies and unfavourable environmental condition.(iii) better condition for growth and survival.
PROCEDURE INVOLVED IN FISH BREEDING.
(1)selection of broodstock from fish pond.
(2)Inducing final maturation and ovulation with hormone treatment.
(3)Procurement of ripe eggs by stripping.
(4)Procurement of milt by dissection of male donor.
(5)Artificial fertilization.
(6)Rearing of lavae or fry.
SELECTION OF BROODSTOCK FROM FISH POND.
The broodstock was selected and kept in plastic tank filled with water. The female breeder showed the maturity by bringing out a brighter colour and the abdomen, was swollen, lighter brownish in colour, when applied pressure on the abdomen, some eggs quickly comout with light green and a dot in the middle.
In the male breeder, the genital pappillae was elongated. Dark and slightly swollen.
INDUCED FINAL MATURATION AND OVULATION WITH HORMONE.
On the next day, the breeder was broughtout of tank and placed on top of the table by 8:05am to weigh by the the use of weighing scale.
The male broodstock weighed 2.0kg
The female broodstock weighed 3.0kg.
The temperature of the environment is 28 degree cen.
The temperature of water 27 degree cen.
The female breeder was injected with ovaprim(1.5mm) dose by 8:12am intra muscularly at angle 45 degree above the lateral line and above the dorsal fin.
The latency period was 8 hours (time of injection and ovulation).
PROCUREMENT OF MILT BY DISSECTION OF A MALE DONOR.
The male was dissected and to obtained the tastes which are located at the dorsal part of abdominal cavity of the male. The milt was obtained from the tastes by cutting little incisions in the external part of the lobules. The milt was preserved temporaly in glass cup and covered.
PROCUREMENT OF THE RIP EGG BY STRIPPING.
The ovulated eggs in the female breeder was obtained when the eggs riped. The ovulation period reached by 5:15pm. The belly was thick and soft. Two person held the fish with wet towel to aviod injury to the fish. The ventral side of the fish was dried up with toilet tissue and gently pressed towards the genital pappillae to extrud the eggs.
ARTIFICIAL FERTILIZATION
We used dry method of fertilization by adding the milt on the stripped eggs and few drops saline solution to ensure proper mixing of the sexual product through gentle shaking of the bowel and stired.
INCUBATION AND HATCHING OF FRY
We washed the plastic bowel and filled close to the brim with clean water. The fertilized eggs were spread homogenously in a single layer on a kakaban (mosquito netting material placed on top of the water in bowel.
LARVAL REARING
We seperated the larvae from egg shell and unhatched eggs. The kakaban was removed which helped in seperating the lavae from the shell. The remaining unhatched eggs were removed by siphoning.
NURSING (FEEDING) FRY
Feeding started after the third day of hatching, we introduced Artemia naupilli. We fed with Artemia for seven days before changing to 0.3mm artificial feed after four weeks we got fingerlings for stocking. FOR MORE INFORMATION OR POND CONSTRUTION YOU CAN BUY OUR E-BOOKS OR CALL US ON 08032861326. ORDER NOW!.

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