عنوان مقاله [English]
The aquatic ecosystem of Arasbaran lake in Kliber city was developed in 2003 in the geographical location of the '11º39 'north latitude and the '18º47 eastern centuries. In this research, in 2010 for biological and non-biological sampling, 4 stations were located in the lake aquatic zone and one station at the entrance channel site. The location of the Arasbaran dam is such that it is a suitable place for rest and winter migration of migratory birds and during this research, species of them were observed. In this study, six species of native and non-native fish were identified. The study of bedding characteristics in the Arasbaran dam showed that fine grain granules and clays make up more than 74% of the bed. The mean of Benthos seedlings in studied months is 0.37 ± 0.44 g / m2 and due to the dominant presence of two groups of Chironomidae and Tubificidae, the amount of fish production is variable from 0.2 to 1.7 kg ha-1. In general, the highest phytoplankton populations belong to the Cyanophyta branch with the genus Aphanothece, Oscillatoria and Anabaenopsis and the mean of the total number of Cyanophyta was 23455960 per liter. The largest variety of zooplankton belong to the Rotatoria branch with the genus Polyarthra, Synchaeta, Brachionus, Keratella, and Trichocerca. The average water temperature was 15.8 0C, with a range of 6.8 to 24.4 0C, an average dissolved oxygen of 8.4 mg /l, an average electrical conductivity of 863 µm/s with a range of 717 to 1073µm/s and a mean pH of 8.28 with a range of 7 / 62 to 8/75 was measured. Regarding the dominant presence of two groups of Chironomidae and Tubificidae, the amount of aquarium fish production varies from 0.2 to 1.7 kg ha-1, varying from 160 to 200 hectares of the lake at different times up to 60 k.