Animals used and experimental conditions
A total of 1500 juveniles prawn, average total
weight (0.55 ± 0.177 g) and average total length
(2.7 ± 0.12 cm) were purchased from Maryut Fish
Farming Company at Alexandria (El-Amria
region). They were reared in rounded fibre glass
tanks (1.3 m in diameter), until reach maturation.
Prawns were fed a synthetic diet of 35% protein,
twice a day (3% of body weight.)