Organochlorine insecticides in trout,Salmo trutta fario L., taken from four rivers in León, Spain

Organochlorine Pesticide Residues in Rainbow Trout, Oncorhynchus mykiss, Taken from Four Fish Farms in León, Spain

“…It can be also observed that residues are mainly accumulated in brain and at a lower rate in the kidney. This fact was also observed in the previous study carried out by Terán and Sierra (1987).…”

“…Terán and Sierra (1987) in a study carried out in trout (Salmo trutta fario) taken from the same or next rivers (Órbigo [B], Curueño [E] and Sil [F] rivers) to those chosen for this study (see Fig. 1), found the highest incidence percentage for DDT in liver and ∑ kidney (95.45% and 81.81%, respectively) and for DDT and aldrin in ∑ brain (100%).…”

“…Data obtained will provide some information about environmental contamination. Another objective was to investigate whether modifications in levels of these contaminants have occurred since 1987 by comparison with data obtained in a previous study carried out in trout, Salmo trutta fario (Terán and Sierra 1987).…”

“…Terán and Sierra (1987) had also found the highest concentration for DDT (1.285 ppm) in ∑ brain, being p,p'-DDT the pesticide detected at a highest concentration (1. 160 ppm).…”

Occurence of pesticides in fish tissues, water and soil sediment from Manzala Lake and River Nile

“…This may be due to the fact that the concentration of pesticide residues depends on environmental conditions, level of exposure, nature of the pesticide, its solubility, fish species and its ability to excrete the compound. It is worthy to mention that, although pesticides were banned, yet they can still be detected in fish due to their ability to persist for several years and to accumulative effects in aquatic organisms [20].…”