International Journal of Marine Science 2016, Vol.6, No.58, 1-8
4
Fig. 3 Potential Hydrogen Ion (pH) and Dissolved oxygen at three stations in Shatt Al-Arab River during the study period.
Fig. 4 Total dissolved solids (TDS) and Turbidity (FTU) at three stations in Shatt Al-Arab River during the study period.
Zooplankton
The numerical abundance of zooplankton reached its maximum (69223 ind./m
3
) were recorded in winter at (St. 3),
while the minimum density (253 ind./m
3
) were reported in winter at (St. 2) (Table 1). The seasonally average
zooplankton density reported in the present study were 23378, 6693, 29106 and 3842 ind./m
3
, in winter, spring,
summer and autumn respectively.
The Copepoda were dominant in most stations (57%) then Cirripede larvae (20%) and Cladocera (12%) of the
total zooplankton (Fig. 5). The nauplii of Copepoda were dominant in Shatt Al-Arab River which comprising 31.5%
of the total zooplankton then Calanioda 21.6%, Cyclopoida 2.3% and Harpactecoida 0.7% (Fig. 6). The
Cyclopoida was dominant in station 1 (Al-Ashar) while the Calanoida was dominant in station 3 (Al-Faw) (Fig. 7).
