Iran contributes to the stock enhancement of several economically valuable fish species, including the Caspian salmon, S. trutta caspius, by producing and releasing millions of fingerlings into the sea. This work was conducted to determine the production costs of the Caspian salmon fingerlings in the years 2002 and 2003. For this purpose, a questionnaire was prepared and filled in by an expert ...

Iran contributes to the stock enhancement of several economically valuable fish species, including the Caspian salmon, S. trutta caspius, by producing and releasing millions of fingerlings into the sea. This work was conducted to determine the production costs of the Caspian salmon fingerlings in the years 2002 and 2003. For this purpose, a questionnaire was prepared and filled in by an expert ...

the effects of fish weight on salinity tolerance were studied in caspian salmon (salmo trutta caspius) parr. 180 fish (all with 2 years old but with three weights; 5, 15, 25g) were selected and they reared in freshwater (fw) and brackish water (bw; 13ppt salinity) for 10 days. the mrna expression of two α-subunit isoforms of na+, k+-atpase (α1a and α1b) and nkcc co-transporters were studied in ...

HIGHLIGHTS Gynogenesis didn’t have significant effect on Caspian salmon immunological indices. weren’t any blood chemical Hematological indices show changes by gynogenesis. Growth characteristics were improved gynogenesis in fish.

The optimum dose of ultraviolet (UV) irradiation to produce gynogenetic Caspian salmon, Salmo trutta caspius, with emphasis on the "Hertwig effect" and photoreactivation (PR) were investigated. The sperm of Caspian salmon was irradiated with UV at 2010 ? 200 ?w.cm-2 in different times including 0, 1, 3, 5, 8, 10, 15, 20, 25, 35 and 45 min and was allowed to fertilize normal ova; the fertilizati...

this study was inducted to elucidate the effect of different steroid hormones on simultaneous maturation of oocytes in caspian salmon. oocytes were incubated with 1, 10, 100 and 1000 ng/ml of testosterone, progesterone and 17 β stradiol, in vitro, for 40 hrs. gvbd was considered as hormones effectiveness. 17β estradiol was effective just in 1000 ng/ml and testosterone had no positive effect on ...

  Random amplified polymorphic DNA (RAPD) markers were used to estimate genetic relationships between two seasonal immigrant forms (namely fall-run and spring-run) of Caspian trout Salmo trutta caspius. In this regard, 62 fin tissue samples were collected from southern parts of the Caspian Sea basin and examined with 16 oligodecamer primers to asses their genetic diversity as well as probable s...

in order to determine the effects of fish size and weight on its salinity tolerance, the chloride cells (ccs) immunolocalization changes were examined in caspian salmon (salmo trutta caspius) parrs, with the same age (about 2 years old) but different types (type a: 4.88 g, 8.36 cm; type b: 14 g, 11.84 cm; type c: 24.05 g, 14.08 cm). fish survival rate, blood osmolality, gills ccs histological a...