The acute toxicity of fenitrothion on narrow‐clawed crayfish (Astacus leptodactylus Eschscholtz, 1823) in association with biomarkers of lipid peroxidation

Abstract

The aim of this research was to evaluate the acute toxicity of fenitrothion to the crayfish (Astacus leptodactylus Eschscholtz, 1823), which is chosen as an alternative aquatic organism to fish by using the static test system and evaluate the basic lipid peroxidation parameters for the first 24 h. Crayfish of 27.3 ± 0.56 g mean weight and 10.0 ± 0.72 cm mean length were selected for the bioassay experiments. The experiments were repeated three times in 20 liters of tap water. The temperature of water was 21 ± 1°C. The data obtained were statistically evaluated by using a computer program developed by the United States Environmental Protection Agency, based on Finney's probit analysis method and the 96-h LC(50) value for crayfish was calculated to be 15.75 μg/L. The 95% lower and upper confidence limits for the LC(50) were 9.45 to 25.01 μg/L. In addition to the acute toxicity bioassay experiments, 24-h oxidative stress parameters such as malondialdehyde (MDA) levels and ferrous oxidation assay (FOX HP [hydrogen peroxide] equivalents) were also determined. Only MDA levels of hepatopancreas decreased at 5, 10, and 20 μg/L of fenitrothion doses. We can conclude that fenitrothion is highly toxic to crayfish, a nontarget organism in the ecosystem, and the lipid peroxidation indicators can be easily used for monitoring environmental effects.

Environmental DNA reveals invasive crayfish microbial associates and ecosystem‐wide biodiversity before and after eradication

“…The remaining four taxa in the nine candidate bioindicators are all green algae in the family Scenedesmaceae. Congeners of these taxa have been previously found to co‐occur with crayfish, and have been shown to be sensitive to crayfish pesticides (Buřič et al, 2013; Sarιkaya et al, 2011), suggesting that they may constitute important habitat for P. clarkii . We note that invasive tilapia were also present in our study system, potentially inflating the number of taxa significantly associated with crayfish in the pre‐eradication samples.…”

Environmental DNA reveals invasive crayfish microbial associates and ecosystem-wide biodiversity before and after eradication

“…The remaining four taxa in the 9 candidate bioindicators are all green algae in the family Scenedesmaceae. Congeners of these taxa have been previously found to co-occur with crayfish, and have been shown to be sensitive to crayfish pesticides (Buřič et al, 2013; Sarıkaya et al, 2011), suggesting that they may constitute important habitat for P. clarkii . We note that invasive tilapia were also present in our study system, potentially inflating the number of taxa significantly associated with crayfish in the pre-eradication samples.…”

“…Congeners of these taxa have been previously found to co-occur with crayfish, and have been shown to be sensitive to crayfish pesticides (Buřič et al, 2013;Sarιkaya et al, 2011), suggesting that they may constitute important habitat for P. clarkii.…”

Biological peculiarities of the cultivation of narrow-clawed crayfish astacus leptodactylus Eschscholtz, 1823 (crustacea, decapoda)

“…A significant amount of surfactants is used for washing, cleaning and housing. Mineral fertilizers, pesticides, insecticides and other chemicals are additional sources of wasting the water bodies (Sarikaya, Sepici-Dinçel, Caǧlan Karasu Benli, Selvi, & Erkoç, 2010;Ehsani & Jasour, 2014 Table 5. Growth, development and preservation of crayfish…”