The research had studied the qualitative and quantitative
compositions and the distributions of fish caught from Al Qandil
river estuary during the period Jan. – Dec. 2014. In addition, some
morphometric parameters of mullets and rabbitfish finger
lings، the
abundances، periods of presence in various places of the estuary،
vitality and mortality rates were studied.
The aim of this research is to study Influence of different salinity
concentrations on efficiency of feed utilization of Goldfish
(Carassius auratus) fingerlings.
No mortality occurred during the period of the experiment (21
days) at different salinity concentrations (2, 4, 6, 8 and 10 g/l).
This study was conducted to investigate the effect of abrupt and gradual acclimation
of Liza aurata fingerlings to fresh water and gradual acclimation to a selected salinity 3‰.
L.aurata fingerlings were collected directly from the sea and duplicat
e groups of 30
fingerlings were distributed after rest to glass aquaria (100 liter capacity). The first group
was acclimated abruptly to fresh water, the second gradually to fresh water, the third was
acclimated gradually to 3‰ and the last group was left as control in sea water. The
fingerlings were fed artificial diet (35% protein and 500 kcal GE/100g), twice a day to
satiation for 75 days.
