Aliakbar Hedayat
1*, Fatemeh Darabitabar
2, Toktam Bagher
3, Mohammad Moradzadeh
1, Omid Jafari
11 Department of Fisheries, Faculty of Fisheries and Environmental Sciences, Gorgan University of Agricultural Sciences and Natural Resources, Gorgan, IR Iran
2 Department of Fisheries, Faculty of Marine Natural Resources, Khorramshahr University of Marine Sciences and Technology, Khorramshahr, IR Iran
3 Department of Food Hygiene, Faculty of Veterinary Medicine, Shahrekord University, Shahrekord, IR Iran
*Corresponding Author: * Corresponding author: Aliakbar Hedayati, Department of Fisheries, Faculty of Fisheries and Environmental Sciences, Gorgan University of Agricultural Sciences and Natural Resources, Gorgan, IR Iran. , Email:
hedayati@gau.ac.ir
Abstract
In this study, the mortality effects of commercial gasoline at different tested concentrations were evaluated on the common roach
(Rutilus caspicus) and LC50 values for each time period (24, 48, 72, and 96 hours) have been determined. Roach with an average weight
of 3.1 ± 0.45 g and lengths of 4 ± 0.25 cm were used in this study. After transferring the 200 fish to the laboratory, they were kept
in tanks of 100 liters for one week to adapt them to the experimental conditions. After the adaptation period, 100 fish were selected
randomly and divided into 14 treatments (0, 2, 5, 10, 20, 40, 60, 80, 100, 200, 400, 600, 800, and 100 ppm commercial gasoline).
The treatments were completed in triplicate. The results of this study show that the 96-hour LC50 of commercial gasoline is 600.2 ±
0.44 ppm and the maximum allowable concentration (MAC) is 60.02 mg/L. The study demonstrates the deadly effects of commercial
gasoline on the Caspian roach. Spillage of diesel and gasoline fuels from transport tankers can enter rivers and eventually the marine
ecosystem, and reach nursery and spawning areas where it can become a serious threat to fish survival.