ABSTRACT
The purpose of the present study was to determine the response of Artemia salina cysts and to evaluate oxidative stress level in hatching nauplia treated with static magnetic 50 mT field (SMF), taking into account of north (N) and south (S) poles. Four groups of Artemia cysts were investigated: (1) control group without treatment; (2) intact cysts, incubated in marine water, which was treated during 24 h with SMF; (3) dry cysts were irradiated with SMF during 24 h and incubated in marine water for 48 h; (4) cysts in marine water were exposed to SMF during the entire hatching period (48 h). Hatching rate of the cysts and chemiluminescence (ChL) level of their extracts were measured. No significant differences in hatching percentage of cysts incubated in treated magnetic water and dry cysts, pretreated with SMF were observed. Hatching percentage of the developmental cysts irradiated near S pole was higher, than those in the control, while ChL response of the nauplia extracts in various experimental groups was not uniform. Direct and indirect treatment of SMF modifies Artemia early development. The separate pole of SMF plays a role in the response of Artemia hatching process and ChL level in nauplia.
