4FISHERIES OF THE SHRIMPS PENAEUS JAPONICUS AND PENAEUS LATISULCATUS IN THE GULF OF SUEZ

4FISHERIES OF THE SHRIMPS PENAEUS JAPONICUS AND
PENAEUS LATISULCATUS IN THE GULF OF SUEZ
BY
ALYYOUSIF
National Institute afOceanography and Fisheries, Sue=.
Key Words: Penaeusjaponicus, Penaeus latisulcatus, bottom trawl surveys, Gulf of Suez.
ABSTRACT
Large shrimps, Penaeus favonicus and Penaeus latisulcatus are ofthe most
economically important species caught from the GulfofSuez. According to the
present data, Penaeus javonicus was found in 42% of the trcrwling area.
Penaeus lattsulcatus was caught from 21% of the trcnvled area. The wide
domain and productive for fishing ‘the shrimps were El-Sokhnna Bay and its
opposite eastern side for Penaeus javonicus and from Za’ afrana to false Ras
Gharib and its opposite eastern side for both shrimps and El-Fayrouze south
of the Gulffor Penaeus latisulcatus. Penaeus javonicus was caught mainly
from sandy bottoms while Penaeus latisulcatus was mainly from sandy and
grassed bottoms. Depth had a nonlinear relation with the catch per hour and
mean length of the tow catch of Penaeus javonicus. A Significant difference
was estimated for the diurnal variation of catch per hour for Penaeus
javonicus. Penaeus latisulcatus did not appear in the catch during the day.
Catches per hour of the full moon, spring tide, were Significantly lower than
that of neap tide for both shrimps. On the contrary, the mean length of the
catch during the full moon was Significantly larger than that of the first
quarter for Pen61eus javonicus.