A contribution to study of molluscs in the lower reach of Alkebir Alshimaly river and some of it's tributaries Primary study

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%

Ecological Study on the Gastropod Valvatasaulcyi in One Station of the Lower Reach of AlSanawbar River-Lattakia

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 research, 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 ….

Ecological study of Patella caerula in the Lattakia shore

This research is a study of distribution of Patella caerulea in four locations of the Latakia shore different from each other by Substrate nature and their exposure to pollution sources. They are as follow : Afamia (A),Ibn Hani (B) ,harbor fishing of Tower Islam (C), and the sandy beach of Tower Islam (D). This study was achieved between January 2012 and January 2013 ,The samples were collected manually from the Supralittoral , Littoral and Sublittoral region(depth of two meters).The results of this study showed the following: 1 – The area A is the most suitable for the growth and reproduction of the Patella caerulea, which recorded the highest value of biomass reaching ( 3990.2 gr / m²), and the number of individuals (2128 ind /m²) . 2 - The area C recorded the lowest value of biomass (2872.47 gr/ m²) and the number of individuals (1632 ind / m²). 3 - Patella caerulea is consederied a Eurybiont as it was found in all the study areas . 4 - Patella caerulea is comercially important species .

The Specific Composition of Assemblages Gastropods And Economic Migratory Species in several Locations of the Syrian Coast

This research deals with comparable study of the specific composition of assemblages gastropoda and migratory species in four regions of Syrian coast, which differed by substrate nature and their exposure to pollution resources and rivers estuaries, They are as fallow:The Southern Region of Lattakia, AL Bhyss and AL Moelh South of Jableh, Estuary Assin. This research was done between April 2010 and April 2011. The samples were collected from the supralittoral ,littoral and sublittoral regions at depth 3m.

مساهمة في دراسة مجمعات رخويات المياه العذبة و توزعها الجغرافي في السفح الشرقي لجبل الحرمون

يأتي هذا البحث في إطار دراسة تتناول مجمعات رخويات المياه العذبة في جنوب سورية، الهدف منه تحديد أنواعها و توزعها. و قد أظهرت الدراسة وجود عشرة أنواع في مياه الينابيع و الجداول الواقعة في السفح الشرقي لجبال الحرمون. تنتمي تسعة منها إلى صف بطنيات القدم Gastropoda و نوع واحد إلى صف ذوات المصراعين Bivalvia.

مساهمة في دراسة مجمعات الرخويات البرية في محافظة دمشق و ريفها

قمنا في هذه الدراسة، و من خلال عينات من الرخويات، جمعت من القطاعات المختلفة لمحافظة ريف دمشق، بالتعرف على مجمعات أنواع الرخويات الأرضية المنتشرة فيها و قد سجلنا وجود ثمانية أنواع تنتمي إلى فصائل أربع: اثنان ينتميان إلى فصيلة Enidae و نوع ينتمي إلى فصيلة Leucochroeidés و أربعة أنواع تنتمي إلى فصيلة Helicidae و نوع ينتمي إلى فصيلة Helicellidae.