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Register a new userTwo Species were recorded from Copepoda in Mshannaf Dam (Assweida - Syria)
تسجيل نوعين من مجدافيات الأرجل Copepoda في سد المشنف في محافظة السويداء (سورية)
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تحتل مجدافيات الأرجل مكاناً مهماً في السلسلة الغذائية، و تعد أحد المؤشرات البيئية الدالة على مدى جودة المياه و صلاحيتها لري الأراضي الزراعية، كما يعتمد عليها في تحديد الحالة الغذائية للمياه. و نظراً إلى أهميتها من الناحيتين التصنيفية و البيئية قمنا بدراستها في سد المـشنف فـي محافظـة السويداء (سورية) و لاسيما أن تلك المنطقة لم تدرس من قبل.
Copepoda has a great importance in the environement because of the important place it has in the food chain, and because it determines the nutritional situation of the lakes and filtration of Phytoplankton, deteruratus and bacteria.
References used
Beklioglu, M. Ince,O. & Tuzun,I. (2003). Restoration of the eutrophic lake Eymir Turkey by biomanipulation afterba major extrient control. Hydrobiologia, 489. p:93-105
Carrillo, P. Villar-Argaiz, M. & Medina-Sanchez, M. (2001). Relationship between N:P ration and grouth rate during the life cycle of Calanoid Copepods: An in situ measurement. Plankton Research, V.23, N:5. P:537- 547
Cherifi,O. Chifaa, A. & Tifnouti, A. (1993). Influence de certains parametres physico-chimiques sur l'evolution du phytoplancton au niveau de la retenue Lalla Takeroust (Maroc). Verh. Internat. Verein. Limnol, 25. P:1271-1274
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The study included 132 Free – living fish in Lake of 16 Tishreen Dam,
collected randomly during the period from 22/11/2011 until 22/10/2012, on
average once a month, for detecting the infection of parasitic copepoda, and
determine the distribution rate, and their effect on the fish productivity.
Family Vespidae considered as Widespread globally and belong to the order
Hymenoptera called wasps, It contains about 5000 species belong to six subfamilies.
Members of this family differ in terms of style of living and life cycle and the type of
diet. Colors overlap between the black and yellow or red, yellow or three together.
This study examined six species belong to the four genera (Vespa, Vespula, Poistes,
Delta) and three sub-families are: Sub.Fam. Vespinae, Sub.Fam. Polistinae, Sub.Fam.
Eumeninae, gathered from many different areas of the province of Latakia
environment (15 area) from altitudes ranging from sea level to a height of 1000
meters, over a period of time it extends from April through October of 2015.
Rotifers considered as one of the important zooplankton in the ecological
system of fresh water lakes. It’s an essential food for many species of fish. So,
it’s important to be available all over the year with enough abundance. In the
predator pre
sence, polymorphism is considered an effective way for the species
protection. For that reason, one spine or more of the studied species (Keratella
cochlearis, Brachionus calyciflorus) are being built at the same time where the
predator (Asplanchna priodonata or different species of crustaceans) are in the
lake. These spines usually disappear during the predator absence. This study
also reveals that there is no clear role for the temperature or abiotic factors in
the polymorphism operation.
لاحظنا خلال القيام بجولات ميدانية في منطقة وادي القرن، غرب دمشق، خلال الفترة الواقعة بين
عامي ١٩٩٢ ١٩٩٦ ضمن تركيبة المجمع الحيواني للنظام البيئي الغابي لأشجار السنديان العادي
Quercus calliprinos, وجود نوعين جديدين على الفونة في سورية لم يسبق تسجيل
هما من رتبة
Psocoptera هما Mesopsocus duboscqui , Humineura bigoti و قد وصفا لأول مرة من
قبل العالم Badonnel حيث وصف النوع H. bigoti عام ١٩٧٠ في منطقة كاداراش جنوب شرق
فرنسا، و يصادف حاليًا في فرنسا و اليونان و شبه الجزيرة الإسبانية، و هو يعيش على الأوراق و يظهر منذ
الشتاء و حتى الربيع و هو نوع متوسطي.
The study included 144 Free – living fish from the Lake of 16 Tishreen Dam, collected randomly during the period from 12/2011 until 11/2012, on monthly basis to detect the infection with Epistylis sp. and determine its distribution rate.
Fish sam
ples were: Cyprinus carpio L., Varicorhinus damascinus, Garra rufus, Tilapia zilli, and Liza abu. Tilapia zilli was the most prevalent in the lake of 16 Tishreen Dam.
The study revealed fish infection with Epistylis sp. on free – living fish in the Lake, with a total infection rate 22.22 % , mainly on Tilapia zillii (29.70 %) and then on mullet (2%);No infection with Epistylis sp. Was recorded on the other fish species. The infection with this ecto Epistylis sp. was recorded for the first time in Syria in our study.
The infection with Epistylis sp. was located on the skin, fins and gills. The highest infection rate was on the fins ( 42.34 %) , followed by skin (37.46 %) , and then by gills (1.87 %) .
The infection with Epistylis sp. had the highest rate in summer ; i.e. during high temperature , low concentration of dissolved oxygen , and slightly high value of BOD.
The study showed that, the water of 16 Tishreen Dam is relatively clean.
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