lecture
Current Research Journal of Biological Sciences
ISSN:
© Maxwell Scientific Organization, 2013
Submitted:
Accepted:
Published:
Physio-chemical Propreties and Rotifera Population Density of Darbandikhan
Lake, Kurdistan-Iraq
Sherko A. Muhammad and Ahmed F. Ali
Biology Department, College of Science, University of Sulaimani, Kurdistan Regin, Iraq
Abstract: Water samples were collected at regular monthly interval periods beginning in November 2009 to June
2010. The study of Rotifera community has been carried out at five sites including: downstream of the
Darbandikhan Lake (Lake Outlet), near the dam (500 m), left shoreline of the Lake, Sirwan River and Tangero
River. The physical and chemical properties of water were studied including: water temperature (from 11.9ºC to
25.5ºC), pH (from 6.55 to 8.60), EC (from 289 µs/cm to 683 µs/cm), T.D.S (from 184.90 mg/L to 437.10 mg/L), DO
(9.5 mg/L to 1.8 mg/L), BOD5 (from 0.20 mg/L to 8.50 mg/L), Turbidity (from 0.70 NTU to 68.90 NTU) and Total hardness (from 120.10 mg/CaCO3/l to 355.5 mg/CaCO3/L). While 14 genus of Rotifera were recorded, the density of Rotifera in the studied sites showed wide fluctuations in their occurrence. It was ranged from 4 to 134 ind/m3.
The lower value was recorded in site 5 during January and the higher number was recorded in site 2 during May
2010.
Keywords: Darbandikhan, lake, physico-chemical properties, rotifera density
INTRODUCTION
The rotifers are among the most common inhabitants of freshwater everywhere. Some also live in brackish water and few in the ocean or on land in damp sites (Jordan and Verma, 2009). Rotifers are obligate aquatic animals that are reputed to have particularly efficient mechanisms to survive extreme or prolonged periods of drought, in the form of inconspicuously small resting stages, hidden between plant litter and sediment (Segers and Shiel, 2008). Rotifers have been known for about 300 years .Approximately more than
400 species
ISSN:
© Maxwell Scientific Organization, 2013
Submitted:
Accepted:
Published:
Physio-chemical Propreties and Rotifera Population Density of Darbandikhan
Lake, Kurdistan-Iraq
Sherko A. Muhammad and Ahmed F. Ali
Biology Department, College of Science, University of Sulaimani, Kurdistan Regin, Iraq
Abstract: Water samples were collected at regular monthly interval periods beginning in November 2009 to June
2010. The study of Rotifera community has been carried out at five sites including: downstream of the
Darbandikhan Lake (Lake Outlet), near the dam (500 m), left shoreline of the Lake, Sirwan River and Tangero
River. The physical and chemical properties of water were studied including: water temperature (from 11.9ºC to
25.5ºC), pH (from 6.55 to 8.60), EC (from 289 µs/cm to 683 µs/cm), T.D.S (from 184.90 mg/L to 437.10 mg/L), DO
(9.5 mg/L to 1.8 mg/L), BOD5 (from 0.20 mg/L to 8.50 mg/L), Turbidity (from 0.70 NTU to 68.90 NTU) and Total hardness (from 120.10 mg/CaCO3/l to 355.5 mg/CaCO3/L). While 14 genus of Rotifera were recorded, the density of Rotifera in the studied sites showed wide fluctuations in their occurrence. It was ranged from 4 to 134 ind/m3.
The lower value was recorded in site 5 during January and the higher number was recorded in site 2 during May
2010.
Keywords: Darbandikhan, lake, physico-chemical properties, rotifera density
INTRODUCTION
The rotifers are among the most common inhabitants of freshwater everywhere. Some also live in brackish water and few in the ocean or on land in damp sites (Jordan and Verma, 2009). Rotifers are obligate aquatic animals that are reputed to have particularly efficient mechanisms to survive extreme or prolonged periods of drought, in the form of inconspicuously small resting stages, hidden between plant litter and sediment (Segers and Shiel, 2008). Rotifers have been known for about 300 years .Approximately more than
400 species