Aquaculture Engineering (2+1)

Unit 9 - Hatcheries

Design of Hatcheries

Assumptions

Production target = 10 million PLI annum
No. of cycles = 4
Production per cycle = 2.5 million
Survival from stage-1 to PL = 25%
Stage - 1
larvae required per cycle = 10 million
No. of berries females required (Assuming a 50g female gives 20,000 stage – I larvae) = 500 Nos.
Additional stock of 25% = 125 Nos.
Total berried female required = 625 Nos./cycle
No. of berried females required for 4 cycles = 625x4 = 2500 Nos.
No. of males required at 1:4 male and female ratio = 625 Nos.
Total number of prawns required
Male and female = 3125 Nos.