The influence of photoperiod in farming Beluga sturgeon (Huso huso): evaluation by growth and health parameters in serum.

摘要

Data on the concentrations of some blood constituents of reared Beluga sturgeon, Huso huso, including Serum cortisol, glucose, triglyceride, cholesterol, osmolality, Na+, K+, Ca2+, ALP that reared under different light regimes were measured. The light regimes were consist of natural photoperiod (NP), continuous dark (0L:24D), continuous light (24L:0D) and long day regime (16L:8D) and tested on 4 group of 30 one year old reared Beluga for 6 month which sampled four times during the experiment. No significant difference in serum cortisol and ALP levels was found between treatments (p>0.05). Elevations of serum cortisol, glucose, cholesterol and triglyceride concentrations were reported in continues dark regime. Increase of serum osmolality, Na+, K+ and decrease of Ca2+ were also associated with increase of cortisol levels. Results are compared with the few data available in condroestean fish and with those on teleosts.