Study Of some biological aspects of Rotifera Brachionus calyciflorus (Pallas,1799) from AL- Sinn's fish ponds
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الدوارات – B. calyciflorus – أحواض السن – الخصائص الحيوية– جداول الحياةAbstract
- calyciflorus was collected from AL- Sinn's fish ponds and cultured under control laboratory conditions of temperature (25 ± 1°C) ,ph (7.5-8) and fed on green algae (Chlorella) at a density of 1.5 * 106 cells/ml, the aim was studying some biological aspects, life tables showed that the average of each Lifespan was (112.52±20.38 h), amectic females produced 16.67± 4.32eggs, period of embryonic development was (10.08±2.78 h), Juvenile period (14.85±2.20 h), and the average fecundity reached during its Lifespan to 14.67 ±4 eggs. As for morphological characteristics, the average length and width of individuals ranged between 265±20 μm 150±20 μm respectively. As for newly hatched individuals, the average length and width ranged from 170 ±10 μm 90 ± 8 μm respectively, length and width of newly hatched males ranged between 35±3 μm / 120±5, respectively, while the length and width of the egg-sac were 155±5 μm and 116±5 μm, respectively.
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