the influence of dissolved oxygen concentration on gill histopathology of great sturgeon (huso huso) was evaluated in two weight classes (initial weight 280.9?49.2 g and 1217.9?138.1 g respectively). oxygen treatments included hypoxia (2-3 mg/l), normoxia (5-6 mg/l) and hyperoxia (9-10 mg/l). the fish were acclimated to experimental tanks for one week then randomly distributed into 9 tanks in e...

effects of different levels of ascorbic acid consisting of 0, 100, 200, 400, 800 and 1600 mg/kg feed were examined on some immune variables of juvenile great sturgeon (huso huso) weighing 38 g at water temperature 20°c for 16 weeks. significant difference were observed in level of lysozyme in fish treated 400 and 1600 mg compared with control group 8 week post-treatment (p0.05) 16 weeks post-tr...

this study examined the effects of implanted cortisol (to imitate chronic stress) on the hematological responses and cortisol values of female great sturgeon, huso huso, after an endoscopic operation. at the beginning of experiment, all the fish were examined using an endoscope to evaluate gonad development. then, in order to mimic chronic stress following surgery, capsules of cocoa?? butter co...

Fisheries Department, Faculty of Natural Resources, University of Guilan, Sowmeh Sara,1144, Iran ABSTRACT This study was conducted the effect of stress on blood glucose and cortisol levels in cultured great sturgeon. Blood sampling was done and then water level decreased to the half in experimental tanks. The fish were exposed in that situation and second blood sampling was taken after ...

The phylogenetic relationship of five sturgeon species in the South Caspian Sea was investigated using mtDNA molecule. Sequence analysis of mtDNA D-loop region of five sturgeon species [Great sturgeon (Huso huso), Russian sturgeon (Acipenser gueldenstaedtii), Persian sturgeon (Acipenser persicus), Ship sturgeon (Acipenser nudiventris), Stellate sturgeon (Acipenser stellatus)] and DNA sequencing...

The phylogenetic relationship of five sturgeon species in the South Caspian Sea was investigated using mtDNA molecule. Sequence analysis of mtDNA D-loop region of five sturgeon species [Great sturgeon (Huso huso), Russian sturgeon (Acipenser gueldenstaedtii), Persian sturgeon (Acipenser persicus), Ship sturgeon (Acipenser nudiventris), Stellate sturgeon (Acipenser stellatus)] and DNA sequencing...

By decreasing of sturgeon stocks in the Caspian Sea, the culture of different sturgeon species especially Huso huso was increased in Iran. Under stress conditions sturgeon can easily be infected by several opportunistic pathogens. In June 2011, mortality happened in 25-28°C water temperature, in one of the most important cultured sturgeon farms in Mazandaran province in the north of Iran. The m...