9 th INTERNATIONAL MARDIN ARTUKLU SCIENTIFIC RESEARCHES CONFERENCE, Mardin, Türkiye, 20 - 22 Ocak 2023, cilt.0, ss.113
Acute
toxicity of linear alkylbenzene sulfanate (LAS) on fertilized eggs of tarek was
determined. Acute toxicity testing was performed for fertilized eggs. Concentrations
of 0.0, 0.5, 1.0, 1.5, 2.0, and 2.5 mg L-1 of LAS were applied in
the test. The study was conducted using 100 fertilized eggs in each of the test
groups. The test was carried out with 4 replications. The bioassay was
continued for 96 hours at 20.6±0.1 °C. Median lethal concentration (LC50)
96 hours
value was calculated as 0.490 (0.214‒0.737) mg L-1 for tarek
fertilized eggs. Fertilized eggs of tarek are affected by LAS. The LAS
concentration should not exceed 4.9 µg L-1 for fertilized eggs in
freshwater environments where the species reproduces.