Question

The number of fish kept together in breeding hapa is:
(a)Two males and one female
(b)One male and two female
(c)One male and one female
(d)Two males and two female

Answer 1

It is a fixed net enclosure, similar to an inverted mosquito net. It is formed by polyethylene netting with joints in nylon string, twofold sewed to forestall parting. The standard size is 1 m (width) by 1 m (length) by 1 m (profundity). The mesh sizes are usually 1.0 to 2.0 mm, and 5.0 to 6.0 mm.

Complete answer
Tilapias are called to spawn in tanks, lakes, or in little enclosures (breeding hapas) inside lakes. The GIFT technology is utilized for breeding hapas (1 x 1 x 1 ${ m }^{ 3 }$ ) installed during a pond to enable a controlled production of an outsized number of full and half-sib families.

Additional information
Fertilized eggs are water hardened & become swollen measuring 2.2 – 2.5 mm in diameter (Catla is larger) transparent, shining with yellowish‐green dots. The unfertilized eggs are dull in all respects. The Major carps eggs are non‐adhesive & non‐floating. This is the Natural process of breeding. Further, the Stripping or artificial insemination can also be done to initiate more than 95% fertilization of eggs. After that, when the female brood fish after sex play begin to ooze & holds its head slanting upwards and tail down; give a slight pressure on belly facing the Enamel tray where eggs are collected. Then take a ripe oozing male fish within the same fashion because the female provides a small pressure to urge milt/sperms on the eggs collected already.

So, the correct answer is ‘One male and two female’.

Note: Add slight water & continue to stir the tray/ Bucket/ Hundi to mix well i.e. to help the sperm to fertilize the eggs. Or on the other hand, the eggs can be blended in with milt at the earliest opportunity by methods for a plume quill to permit fertilization. The fertilized eggs are washed twice using clean water to remove excess milt and allowed to stay undisturbed in freshwater for 25‐30 minutes at least. The eggs are ready to be released into the hatching hapas.