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Register a new userInvestigation of the Juvenile Stages of Mullets & Rabbitfish and their Abundances in AL-Qandil River Estuary
التقصي عن الأطوار اليافعة لأسماك البوري و الغريبة و وفرتها في مصب نهر القنديل
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تناول البحث الحالي دراسة التركيب النوعي و الكمي للأسماك المصطادة من مصب نهر القنديل و توزعها خلال فترة الدراسة من ك1 إلى ك2 لعام 2014, كما نم إجراء بعض القياسات المورفومترية لإصبعيات البوري و الغربية و دراسة وفرة هذه الإصبعيات و تحديد أماكن و فترات وجودها في مصب النهر, فضلا عن قياس الحيوية و نسبة نفوق هذه الأسماك خلال عملية الصيد و التداول.
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 fingerlings، the abundances، periods of presence in various places of the estuary، vitality and mortality rates were studied.
References used
WORM، B.، BARBIER، E. B.، BEAUMONT، N.، DUFFY، J. E.، FOLKE، C.، HALPERN، B. S.، JACKSON، J. B. C; LOTZE1، H. K; MICHELI، F; PALUMBI، S. R; SALA، E; SELKOE، K. A;STACHOWICZ، J. J AND WATSON، R، 2006. Impacts of biodiversity loss on ocean ecosystem services. Science، Vol. 314، No. 5800، 787-790
HOLLOWED، A. B; AYDIN، K. Y; ESSINGTON، T. E; IANELLI، J. N; MEGREYB. A; PUNT، A. E;and SMITH، A. D. M، 2011. Experience with quantitative ecosystem assessment tools in the northeast Pacific. Fish and Fisheries، Vol. 12، 189– 208
LINK، J. S; BUNDY، A; OVERHOLTZ، W. J; SHACKELL، N; MANDERSON، J; DUPLISEA، D; HARE،J; KOENALONSO، MAND FRIEDLAND، K. D، 2011. Ecosystembased fisheries management in the Northwest Atlantic. Fish and Fisheries، Vol. 12، No. 2، 152-170
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The objective of this article is describing the changes of the coastline shape during
the time period extended between 1973-2014.
the coastal zone is very special because it occur at the interface between the three
major natural systems at the ear
th surface atmosphere, ocean and land surface.
Geomorphological factors operating in all three of these systems are responsible for
shaping the coastal zone, and the interaction between the three different sets of processes
makes the coastal zone an extremely dynamic one.
At present, a wide range of tools and techniques are available to help us to study the
evolution of coastline during the time intervals determined by the available data, and thus
become our ability to predict future changes.
improve our understanding of the geomorphological processes affect the coastal
zone allow us to minimize their effects, and use this knowledge in the development of
comprehensive coastal zone management planning.
In this study the concentration of (Cu, Cr, Cd, Fe, Mn, Ni, Zn , Pb ,V &Co) in
some sedimentary columns and pore-water extracted from the estuary of Al-Kabeer
alshemali river was determined during four seasons .the concentrations of these metals
w
ere determined using atomic absorption spectroscopy (AAS). The columns were cut into
slices with 2cm of thickness ,the pore water at every slice was extracted using
centrifugation (7000 r/min).the results showed that the concentration increased from
surface(deep=0cm, rich of O2) up to the 4cm of deep ,then the concentration decreased in
deeper slices (down of 4cm,deficiency of O2) and the concentration of Fe and Mn from
high ranking ppm. The rest of the items were relatively lower ranking ppb, but Co, Cd and
V were low. meat increased the concentration of all these elements in the spring and
summer, compared with the values in the winter and autumn, due to increasing human
activities on the one hand and the high temperature on the other hand, leading to increased
activities of bacterial that leads to the decomposition of organic material that may increase
the ratios of these elements in the pore water.
This study deals with the determination of total mercury concentration in the water
taken from three sites on Al-Kabeer Al-Shemaly River ( near the industrial area and Al-
Damat Lake, and 16 Tishreen Lake), also the effect of some physio-chemical p
arameters
including: DO, pH, T °C. of water in the three sites was studied.
Results showed that the total mercury concentration was low in general, where the
medium concentration in the three studied sites was 0.29 ppb and it was less than the
permission level of total mercury in the surface water(> 10 ppb), the higher value of the
medium concentration of total mercury(0.35, 0.31, 0.21)ppb was recorded in the Industrial
Area, Damat Lake, then 16 Tishreen Lake, respectively. For the changes in the total
concentration of mercury in the three studied sites during seasons of a year, was higher in
Summer comparing with other seasons. The results showed positive correlation coefficient
between the total mercury concentration and temperature, pH value, but it was negative
with DO in Summer.
Al-Kabeer Al-Shemale river rises from Aqraa Mountain and coastal mountains, it is considered one of the largest rivers in the coastal area.Its catchment area is 1097 km2, and empties into the sea to the southern of Lattakia.The study aims to determin
e the impact of climate change on the river discharge. Since the rainfall is the major factor in the runoff formation in the river catchment, the rainfall changes have been studied in climatic stations located within the catchment and its surroundings, and for a period of time exceeding thirty years. The study found that the general trend of rainfall change and runoff with time is decreasing, declining rainfall values ranged in the studied stations between (0.4-12.5) mm per year, and the runoff reached 0.08m3/s in the year. A mathematical equation, predict river discharge after knowing the values of daily precipitation, has been concluded.
This search was conducted during 2014-2015 growing season in Agricultural
research station in Al Kraeim belonging to Al Salameah district in Hamah Provence in
order to study the effect of plant density on; First, the phenological stages of lentil p
lant
calculated in day unit. Second, the seed productivity in a lentil plant calculated in g/plant,
and then seed production in Hectares (Kg/ha-1).Lastly, percentage of seed protein content
in seeds. In this study, three plant densities were used (200, 250, 300 seeds/m2, and was
designed using Randomized Sectors in three replicates for each density. Results showed
that;
1) The low density plants (200 seeds/m2) was significantly better than other
densities (250 and 300 seeds/m2) in:
Reaching 50% seed germination (19.4, 20.5 and 22.5 day continually) and in
flowering stage (111.36, 113.6 and 114.7 day continually) and in maturation/Ripening
stage (134.4, 136.6 and 137.7 day continually).
Seed production per plant (1.553g/plant) in comparison by seed production of
other densities (1.487 and1.376 g/plant).
Percentage of seed protein (26.8%) in comparison by seed protein of other
densities (26.3 and 26.19 %).
2) The higher densities (300 seeds/m2) was better in seed production in aria unit
(1791.3 Kg/ha-1) in comparison by production of other densities (1492.7 and 1194.2 Kg/
ha-1).
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