This study was designed to determine the influence of thermal level and duration chilling period on initiation progress gonadogenesis gametogenesis under controlled conditions in pikeperch (Sander lucioperca). A set 120 fish distributed into eight tanks (15 per tank). The effects two temperatures (6 or 12°C) combination with durations period, either short (S; 75 days at 6°C 125 long (L; 135 185...

Osmoregulation capabilities of two size groups (1 and 2g) of zander , Sander lucioperca, fingerlings were investigated survival rate, plasma osmolarity, sodium (Na+), chloride (Cl-) ion concentrations and cortisol level within 0, 6, 24, 72 and 240 h after abrupt transfer from freshwater to 7 and 12‰ salinity. Also, some hematological parameters were measured at 240h. The plasma osmolarity and ...