Determining the Lethal Concentration of Formalin to Persian Sturgeon (Acipenser persicus Borodin, 1897) and Stellate (Acipenser stellatus Pallas, 1811) Fingerlings

Subject Areas : New Technologies in Aquaculture Development

Received: 2021-02-13 Accepted : 2021-02-13 Published : 2015-08-23

Keywords: Formalin, Persian sturgeon, Keywords: Lethal concentration, Stellate,

Abstract :

Abstract[1] Formalin is a disinfectant which is widely used to control fungal diseases in fish eggs, but its acute toxicity to the surgeon fingerlings has less been studied. OECD standard method was used to determine the acute toxicity of formalin to Persian sturgeon and stellate fingerlings in this study. After primary experiments, 8 concentrations with a control and 3 replicates apiece were established for each species. Mortalities were recorded every 24 hours and at the end of 96 hours, the values of LC10, LC50 and LC90 were calculated using Probit analysis. The results showed that LC10, LC50 and LC90 values of formalin during 96 hours for Persian sturgeon fingerlings were 4.81, 24.58 and 125.57 mg/l and for stellate fingerlings were 11.48, 20.32 and 35.99 mg/l, respectively. Also, MAC value, LOEC and NOEC were calculated 2.46, 4.81 and 2.46 mg/l for Persian sturgeon and 2.03, 11.48 and 2.03 mg/l for Stellate. The sensitivity factor showed that stellate fingerlings are 1.2 times more sensitive to formalin compared with Persian sturgeon fingerlings. * Corresponding Authors; Email: [e-mail]