الفهرس 
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Abstract
The present work is conducted to study effect of some
feeding and rearing systems on productive performance of the
Egyptian sole (Solea aegyptiaca) as a follows: The first part: Effect
of sex ratio and stocking density on the induced spawning of Solea
aegyptiaca. The second part: Effect of some feeding and rearing
systems on growth and development of Solea aegyptiaca larvae. The
third part: Effect of diet type and stocking density on growth
performance and blood parameters of Solea aegyptiaca fingerlings.
The first part: Broodstock spawners were intermuscularly
injected with Human Chorionic Gonadotropin Hormone (HCG)
below the dorsal fine base, the dose was 7000 IU/Kg body weight of
fish. In this study, three different broodstock sex ratios: 1:1, 1:2 and
2:1 (male ♂: female ♀) were tested. Under the conditions tested in
this study, larvae production of Solea aegyptiaca was affected by
different broodstock sex ratios and improved at a sex ratio (1♂:2♀).
Also, four different broodstock stocking densities: 0.5, 0.75, 1, 1.25
Kg/m3 were tested. Under the conditions tested in this study, larvae
production of Solea aegyptiaca was affected by different broodstock
stocking densities and the best stocking density was 0.75 Kg/m3.
Also, results demonstrated superiority of artificial spawning
compared to natural one.
The second part: The first experiment was tested five
different feeds type (live food (Rotifer and Artemia) and poultry egg
(whole egg, egg white, egg yolk and boiled egg yolk)). The results
indicated that, larvae that fed on live food showed statistically
higher growth rate compared to all the other groups. Survival rate
values were relatively high with fed on egg white and fed on live
food. The second experiment was tested five different salinities (10,
15, 20, 25 and 30‰). The results found that, no significant difference
in growth rate, but the best performance and survival rate of larvae
was at salinity 20‰. The third experiment was tested eight different
water temperature (16, 17, 18, 19, 20, 21, 22 and 23°C). The
results showed that, the larvae under temperature 20 °C showed the
highest growth rate, while the best survival rate was recorded at
temperature 16 °C under experimental conditions. The fourth
experiment was tested four different photoperiods (light, L: dark, D):
6L:18D, 12L:12D, 18L:6D and 24L:0D). The results indicated that,
the best growth performance of larvae was at photoperiods 18L:6D
and 24L:0D. Larvae exposed to photoperiods (12L:12D, 18L:6D and
24L:0D) led to relatively higher survival rate compared to
6L:18D. The fifth experiment was tested four different stocking
densities (50, 80, 110 and 140 larvae/ liter). The results found that,
no significant difference in growth performance. Stocking density of
110 larvae/liter led to relatively higher survival rate compared to
the other stocking densities. The sixth experiment was tested three
different feed (Artemia (T1), Artemia + artificial feed (T2) and
artificial feed (T3)) of Solea aegyptiaca post-larvae weaning.
Results of growth performance parameters were highest with postlarvae fed on (T1) compared to the other feeds (T2 and T3 ). Larvae
fed on (T1 and T2 ) led to higher survival rate compared to fed on
(T3).