Dimethoate was the most toxic of the insecticides tested with an LC50
The mean ([+ or -] 95% CI) 24 h LC25, LC50
, and LC75 for D.
The results showed that after 24 hours of exposure period the LC50
and LC99 values were 1.
Although, we found greater LC50
but in another study, Achillea millefolium showed LC50
The dominating heterotrophic bacteria were observed among bacterial communities of the digestive tract of control fish (Figs 1-4) in the experiment of 96-hour exposure of rainbow trout to different parts of LC50
of Cu + Zn ions mixture.
Regarding overall sensitivity of three fish species, Labeo rohita showed significantly least sensitivity to metal mixtures with a mean LC50
and lethal concentrations of 81.
Taciau veikiant vaivorykstinio upetakio jauniklius 0,16 mg/l Cu (0,25 LC50
suaugusiu zuvu) koncentracija, kvepavimo daznis reiksmingai padidejo nuo 70,0 [+ or -] 2,6 iki 83,0 [+ or -] 3,4 krt.
The toxicity results for 48-h LC50
of water samples to C.
for each pesticide was determined from the curve of percentage germination against dose.
Certain measurements were also found to exceed the values for EC50 (the concentration required to have a defined effect on 50 percent of a study population) or LC50
value obtained through sigmoid curve was 36 [micro]g/L and linear curve was found to be 34 [micro]g/L.
Palabras clave: Toxicidad aguda, cobre, LC50
, postlarvas de Cryphiops caementarius.