NARSS

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Plankton Task In Lake Manzala
NARSS NATIONAL AUTHORITY FOR REMOTE
SENSING AND SPACE SCIENCES.
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MATERIALS AND METHODS Zooplankton samples were
collected from each station at approximately
monthly intervals between July, 2003 and Sept,
2004. Each sample contained thirty liters of lake
surface water filtered through 55µm mesh size
plankton net. Samples were fixed in 4 formalin
and examined under a binocular microscope.
Fifteen successive sub-samples were examined, the
average count was taken and the results were
expressed as the number of organisms per cubic
meter.
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Zooplankton Data Jan.-March., 2004
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Zooplankton Data April-June, 2004
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Zooplankton Data July-Sept, 2004
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Table (1) Average numbers of zooplankton
organisms (No. of org./m3) recorded at Manzala
Lake during the period of July - September, 2004.
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Figure 6 Percentage composition of the recorded
zooplankton groups in Lake Manzala during July -
September, 2004
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Phytoplankton Data Jan.-March., 2004.
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Phytoplankton Data April.-June., 2004.
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Phytoplankton Data July-Sept., 2004.
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Biological Results of Lake Manzalah
Phytoplankton seasonal Distribution
Chlorophycea (green algae - Cyanophycea (blue
green algae) Diatoms - Dianoflagellates
Seasonal Average of phytoplankton standing crop
showed that the highest was Achieved during
Spring- Autumn- winter- summer
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Biological Results of Lake Manzalah
Zooplankton Distribution
Zooplankton in lake Manzala include Protozoa,
Nematoda, Rotefera, Polycheat, Cladocere,
Ostracoda, Copepoda and Mysidacea
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Zooplankton Data July- Sept., 2003
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MATERIALS AND METHODS Zooplankton samples were
collected from each station at approximately
monthly intervals between April, 2004 and June,
2004. Each sample contained thirty litres of lake
surface water filtered through 55µm mesh size
plankton net. Samples were fixed in 4 formalin
and examined under a binocular microscope. Three
successive subsamples were examined, the average
count was taken and the results were expressed as
the number of organisms per cubic meter.
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Percentage composition of the zooplankton
groups in Lake Manzalah during August 2003.
Distribution of the standing crop of the
zooplankton groups (org.x103/m3) in Lake Manzalah
during August 2003.
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Percentage composition of the zooplankton groups
in Lake Manzalah during July 2003.
Distribution of the standing crop of the
zooplankton groups (org.x103/m3) in Lake Manzalah
during July 2003.
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Spatial distribution of the zooplankton
standing crop (org.x103/m3) in Lake Manzalah
during August 2003.
Spatial distribution of the zooplankton groups
(org.x103/m3) in Lake Manzalah during August 2003.
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Spatial distribution of the zooplankton standing
crop (org.x103/m3) in Lake Manzalah during July
2003.  
Spatial distribution of the zooplankton groups
(org.x103/m3) in Lake Manzalah during July 2003.
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Spatial distribution of the zooplankton
standing crop (org.x103/m3) in Lake Manzalah
during September 2003.
Spatial distribution of the zooplankton groups
(org.x103/m3) in Lake Manzalah during September
2003.
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Percentage composition of the zooplankton groups
in Lake Manzalah during September 2003.
Distribution of the standing crop of the
zooplankton groups (org.x103/m3) in Lake Manzalah
during September 2003.
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Zooplankton Data Oct.- Dec., 2003