STUDIES ON GROWTH AND PRODUCTIO~NOF SEABREAM SPARUS AURATA IN BRACKISH WATER FISH FARMS

STUDIES ON GROWTH AND PRODUCTIO~NOF SEABREAM SPARUS

AURATA IN BRACKISH WATER FISH FARMS

BY
ABDALLA, A. EL-SHEBLY& NAGAT A. SILIEM
National Institute a/Oceanography and Fisheries. Alexandn”a. Egypt
ABSTRACT
The effect of two stocking densities (1500 and 3000 frylfeddan) on
growth performance. survival rate and total fingerlings yield ofsea bream,
Sparus aurata. fry was investigated. The results indicated that, density
effects growth in extremely dense sea bream monoculture in nursing
earthen ponds. However, sea bream fry reared at high density tended to
have more fingerlings production.
Monthly variations in growth rate of sea bream fingerlings during
rearing period were studied during the present work. It was observed that
growth almost ceased after November when water temperature dropped
belnw 15°C. fishes growth rate decreased between January and April, then
growth increased as dependant on water temperature.
intensive
The final
conditions
production
was
of
407.2
INTRODUCTION
sea
kg
bream
with
(Sparus
a mortality
aurata)
rate of
reared
7. 7%.
under semi