EFFECT OF DIETARYLIPID LEVEL ONPUBERTY AND OOCYTE DEVELOPMENTIN FLORIDA RED TILAPI4 "OREOCHROMIS SPECIES" rf"AMILY: CICHLIDAE) REARED UNDER DIFFERENT SALINITY LEVELS.

EFFECT OF DIETARYLIPID LEVEL ONPUBERTY

AND OOCYTE DEVELOPMENTIN FLORIDA RED TILAPI4

“OREOCHROMIS SPECIES” rf”AMILY: CICHLIDAE)

REARED UNDER DIFFERENT SALINITY LEVELS.

BY
MOHARRAM, S. G.* AND EL-EBIARY, S E. H
*National institute ofoceanography andfisheries, Ket,bey, Alexandria.
Key words: Feeding and nutrition; fish reproduction; lipid; gonad; puberty
development
ABSTRACT
Florida red tilapia was maintained on four isonitrogenolls (30%
crude protein) diets ofdifferent lipid levels (3. 6. 9 and 12%) at three
levels of salinity. In freshwater. there were detectable and significant
changes (P9%) showed
some sort of abnormality; the fat vacuoles were numerousforming a
mass ojjat which in turll enlarged the oocytes. In conclusion, 9% lipid
level. was found to be the optimum levelfor female reared in brackish
water and seawater and 6% for those reared infresfrn1ater and the
brackish water is the beneficial salinity for rearing this hybrid