A WAY TO RAISE RANCHU ● CULLING ROUND - II

Second Culling Round - One Month After Hatching

The fry size should be around 6/8 in (20 mm). The selection is performed by looking from above. Tail is opened very clearly and tail core can be easily determined.

Main objective during the second round of culling is still the tail shape and the tail core. Tail core effects future development of the tail and must be payed special attention. During this round the fish number can be reduced from one third to one half.

Basic tail standard to follow:

Negative Points To Look For From Above:

1. tail bracelet comes to a point
2. tail core is rigid and thick (a), no tail shoulders (b) 
3. peduncle is not curved (a), tail tip is deformed (b) 
4. tail core is not in the middle
5. tail core overlaps (a), tail shoulders are not symmetrical (b)
6. tail shoulders indented, not open (a), tail core is pinched (b), bump on peduncle (c)

 

During the Second Round

The focus must be on the tail core. It requires a 100% screening. Usually the number is reduced from one third to a half.

_________________________________________________________________________________

Links to published chapters:

● INTRODUCTION
● WATER
● NOTES ON GREEN WATER & WATER CHANGE
● WATER TEMPERATURE
● AERATION
● SUNLIGHT AND SHADE
● CONTAINERS FOR RAISING RANCHU
● FOOD
● FEEDING REGIMENT
● BREEDING & SPAWNING
● RAISING & GROOMING FRY
● GROOMING KUROKO AND TOSAI
● CULLING
● SELECTION METHODS
● CULLING ROUND - I
● CULLING ROUND - II
● CULLING ROUND - III
● CULLING ROUND - IV
● CULLING ROUND - V
● FORSEEING RANCHU CHANGES IN THE FUTURE

_________________________________________________________________________________