The freshwater fish species examined in this study is the
goldfish C auratus (Linnaeus, 1758) of the cyprinidae family.
The female and male goldfish broodstock used in this study
were produced at the Rasht Bony Fish Hatchery Complex in
Rasht, Iran; the fish-conditioning experiment and egg incubation
were also performed here. The experiment was
conducted between December and April. All fish were
handled in compliance with published guidelines for animal
experimentation [23].