Reproduction cycle and tolerance to temperature and salinity of Amyloodinium ocellatum (Brown, 1931) (Dinoflagellida).

摘要: Reproduction cycle and tolerance to temperature salinity of Amyloodinium ocellatum (Brown, 1931) ( Dinoflagellida ) was investigated in the laboratory using postlarval Sparus aurata (L.) as fish host by vitro study parasite is reproductive stage. Trophont growth linear length exponential volume, continuous detachment stage at size 50-90 microns length. At 19-24 degrees C occurred gradually during 3-5th days after settlement. 16 growth, well detachment, delayed. However, 6-7th day trophonts still attached exceeded 100 When detached, any age were transformed into dividing tomonts . 24-hour old, less than 25 , however, immediately sporulated with no division. The number divisions sporulation related detachment. For reproduction, 18-30 optimal range, although minimal division time 23-27 C. Divisions delayed interrupted 15 Complete interruption gradual mortality 8 35 reproduction process severely damaged. Tolerance dependent on ambient widest 24-25 between 1-78 ppt, but uninterrupted division, full yield effective infection only 10 60 ppt. No above 80 short term incubation up 4 salinities 180 ppt did not affect potency. Wide variation was, evident tested population individual tomont each population.