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Register a new userA contribution to study of molluscs in the lower reach of Alkebir Alshimaly river and some of it's tributaries Primary study
مساهمة في دراسة رخويات المجرى السفلي لنهر الكبير الشمالي و بعضاً من روافده دراسة أولية
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تم تحديد ست محطات مائية على طول المجرى السفلي لنهر الكبير الشمالي و بعضاً من روافده تختلف بصفاتها اللاحيوية و الحيوية. لقد جمعت العينات المائية و الحيوانية بمعدل مرتين شهرياً خلال فصل الربيع و الصيف و الخريف و مرة واحدة شهرياً خلال فصل الشتاء و ذلك لمدة عام من آب 2013 و حتى آب 2014. لقد تم التعرف على 17 نوعاً من الرخويات المائية العذبة في المحطات مجتمعة منها 15 نوعاً تنتمي إلى صف بطنيات القدم Gastropoda (ستة أنواع منها تنتمي لتحت صف أماميات الغلاصم Prosobranchia و تسعة أنواع لتحت صف الرئويات Pulmonata) و نوعان ينتميان لصف ثنائيات المصراع Bivalvia مع الإشارة إلى أن أحد نوعي ثنائيات المصراع و هو النوع Corbicula fluminea تم تسجيله لأول مرة في القطر العربي السوري. تم التركيز في هذا البحث على محطة مفرق قسمين حيث أوضحنا الصفات الفيزيائية الكيميائية للمياه و حددنا فيها 11 نوعاً من الرخويات كان أكثرها تكراراً أفراد النوع Melanopsis praemorsa بتكرار نسبي 46.53% و هو أيضاً أكثرها ثباتاً في العينات المتتالية كافة بثبات قدره 100%.
Six water stations were chosen along the lower reach section of AlKebir ALShimaly river and some of it's tributaries, differing in their biotic and abiotic features. Water and animal samples were collected bimonthly during spring, summer & autumn and monthly during winter during the period 25/8/2013 – 26/8/2014. Seventeen species of freshwater molluscs were identified in all stations, fifteen belonging to Gastropoda (6 of Prosobranchia & 9 of Pulmonata) and 2 belonging to Bivalvia, one of it (Corbicula fluminea) was recorded for the first time in Syrian Arab Republic. We focused on in this study on the station ( Mafraq Quesmeen) that we studied it's chemical and physical properties of the water and we identified 11 mollusc species and the most frequency of it was Melanopsis praemorsa and it's frequency rate was 46.48% and it was the most constant in all continuous samples and it was 100%
References used
ADAM, W. Mollusquesterrestres et dulcioles. Faunade Belgigue. Inst, Rey, Sci, Nat pelg. 1960, 1 ,402p
BIJ DE VAATE,A. Hulea,O . Range extension of the Asiatic clam Corbicula fluminea ( M ü lle r 1774) in the River Danube: first record from Romania . Lauterbornia 38: 23-26p, D-86424 Dinkelscherben, 2000-06-15
CIUTTI,F. CAPPELLETTI,C . First record of Corbicula fluminalis (Müller, 1774) in Lake Garda (Italy), living in sympatry with Corbicula fluminea (Müller, 1774) .J. Limnol., 68(1): 2009 ,162-165p
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Three sampling stations were chosen along the lower reach section of AlSanawbarriver (Lattakia-Syria). In these stations, the freshwater molluscs were studied, environmentally and taxonomically, during the period 4/3/2012 – 4/8/2013.
In this resea
rch, I present the results of the environmental study on the Gastropod Valvatasaulcyiwhich was more abundant in the 3rd station; 5km of the estuary.
Ten mollusc species were identified; 8 belonging to Gastropoda (4 of Prosobranchia & 4 of Pulmonata) and 2 belonging to Bivalvia.
The chemical and physical properties of the water in the 3rd station were studied and the work was concentrated on Valvatasaulcyipopulation and structure, where samples were collected bimonthly during Spring, summer & autumn and monthly during winter. It was shown that reproduction of such species is continuous along the year, with 2 reproduction beaks: the more important one is spring beak and the less important one is autumn beak.
The population structure of the species was studied: shell dimensions were measured and the relationships were studied between height growth and breadth growth of the shell, and between the breadth growth and dry weight of the individual ….
The lithological study and micropaleontological analyses of 21 samples
taken from four geological sections of lower Miocene deposits led to a
stratigraphic study for determination of enrichment of planktonic species in
these deposits . These speci
es were combined with biozones of lower miocene
and their stratigraphic distribution in the studied sections according to
planktonic foraminifera of worldwide spreading . This study contributed in
understanding of paleogeographic development of Neogene basin within this
period of time , which appeared as a marine progress in lower Miocene ,
which continued up to upper Miocene in the northwestern part of Syria . The
sediments of lower Miocene consisted of marl , clay marl deposits with
interfacial layers of clay and limestones or marl limestones deposited
unconformithy with nummoliticlimestones of Eocene , or cretaceous
carbonates rich in betome sometimes .
This study aimed at determining the fish fauna composition in 16th of Tishreen Lake
(Alkabeer Alshimali River). A total of 730 individual fishes were collected between April
2012 and March 2013 from five different sites along the lake /Alsafkoon, W
ata-Alsheer,
Alkerassat, Mazraet Alsheikh Deeb, and Alaqfaas area/.
Our results showed the presence of only six main fish species belonging to three
families (Tillapia zillii, Cyprinus carpio, Liza abu,Varicorhinus damascinus, Garra rufa
and Garra lamta). The results also showed that Tilapia zillii was the most caught fish, and
Wata-Alsheer was the richest site in the lake. These results showed a decrease in the
number of fish species and their quantities compared to that in previous studies on the lake.
Given to the danger of chemical pollution in general and in Surface water wells in agricultural and populated areas, we carried out a scientific study to measure the existence level of some metal ions in distributed water wells within environment vil
lages (SitGers,
RuwaysatHarash, Bdmeon) and to monitor changes in their values as an indicator of the rate of chemical pollution in the study area due to existing activities. Research has included analyzes monthly periodical physical chemical to invested wells of villages (SitGers,
RuwaysatHarash, Bdmeon) in Lattakia over the full year starting from November 2010 untilOctober 2011 with two wells selected from each village in the study, The study included identification pH , electrical conductivity , temperature and set of negative
electrolytes (nitrate NO3-,phosphatePO4-3, sulfateSO4-2) in addition to positive electrolytes (ammoniumNH4+,potassiumK+), The recorded Values for the studied ions varied during the study months to the same wells, due to existing activities, especially the agricultural and climatic conditions that prevailed during the sampling dates. The recorded results show the existence cases of chemical contamination in studied water wells portend a lot of
environmental and health risks, especially that most of these wells water used for drinking and irrigation together.
In this work we studied the Syrian Ophiolite complex rocks.
like (ultrabasic: Dunite ,Peridotite- Hartzbergate) and the sedimentary
rocks like Radiolarite,that at the west end of ALKABER AL SHIMALI
river, by collecting field samples and mapping of
geological section.
This study gave us a detailed Petrographic and metallic describe of
rocks in the study area, in this study see the installation of rocks and
multiple stages of transformation of metals ,and indicated the presence
of iron and manganese oxides.
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