The impact of the 96-hour exposure to the LC50
Cu+Zn ions mixture on the abundance of bacteria in digestive tract of rainbow trout (Oncorhynchus mykiss) Concentration in portion of equitoxic 96-hour LC50
or EC50 value of copper for marine invertebrates.
Each fish species was tested, separately, for acute toxicity tests (96-hr LC50
and lethal concentrations) against each metal mixture at constant hardness, pH and water temperature.
): jautriausios buvo lervos, maziau jautrios--suaugusios zuvys ir ikrai (Kazlauskiene, Vosyliene 2008).
Cyfluthrin, the active ingredient in Baythroid[R] and Tempo[R], also is extremely toxic to aquatic invertebrates with a similar LC50
value of 0.14 [micro]g/L for D.
Values were derived using probit analysis Species LC50
, 24h (g [1.sup.-1] of NaCl) Brachionus calyciflorus 3.75 [+ or -] 0.04 B.
Moreover, the LC50
of ethanol and acetic acid were measured on each line at each generation.
values were also confirmed the higher toxicity of A.
The compounds treated to the 4th instar larva of Aedes albopictus after 24h, the LC50
values of rotenone was 5.12 mg/L, while the LC50
of compound A, C, D, I, J, and K were 46.09 mg/L, 12.91 mg/L, 38.24 mg/L, 66.82 mg/L, 61.44 mg/L and 34.17 mg/L, respectively.
While fraction 6 (isolated from the acetone originated fraction) was near to fraction 1 in its mortal effect with LC50
values of 403 and 292 ug/ml after 24 and 48 hours exposure, respectively without significant differences between each other, fraction 2 (isolated from the solvent system I) significantly exceeded the previously mentioned two fractions (1 and 6) exhibiting mortality percents increasingly with increasing the tested concentration to complete lethality of the treated population at 2000 ug/ml achieving 321 and 166.8 ug/ml LC50
values after 24 and 48 hours, respectively.
Determination of the median lethal concentration (LC50
) The LC50
was determined using probit analysis method described by Finney .
Acute toxicity of Cadmium (Cd) using 96 h LC50
and lethal concentrations was determined for the three fish species viz.