Table 1 conditions of rearing

Density of eggs

100 egg l^-1

Water quality

Tank filled with filtered sea water from deep drill

Renewal from biological filter

Pseudogreen water method

Closed recirculation system

Controlled temperature and light

Temperature range

Constant 17,5 ± 1°C

Water renewal rate

Initially 10% h^-1, gradual increase to 40% h^-1 at 35 dph

Photoperiod

12L:12D

Larval food

Enriched rotifers (5 ind ml^-1),

Enriched Artemia Instar II (0.5-1.0 ind ml^-1)

Artificial feed

Daily addition of phytoplankton (in order to maintain a concentration of ca. 650 ± 300 × 10³ cells ml^-1) for 15 days after hatching