Summary
Monensin and lead, separately or concurrently, were orally administered to broiler chicks at different toxic levels. Monensin slightly increased the selenium and profoundly increased the lead and iron levels of liver. Lead also increased the level of iron in liver. Levels of lead and iron in liver tissue further increased when monensin and lead were administered concurrently. An increased mortality was recorded due to concurrent administration of monensin and lead during acute toxicosis but during subacute toxicosis body weights were higher in birds administered monensin and lead concurrently than those given these substances separately.
According to literature data the edible parts of squid contain significant amounts of mineral components as well as of trace elements and heavy metals [2, 4, 5, 7]. Their levels may be approximate to those allowed in Poland for canned fish.
The aim of this work was to determine the content of the selected mineral components in canned squid var. Illex.
The examination of total amounts of heavy metals (Hg, Cd, Cu, Pb, Cr, Ni, Zn) was conducted in the outflow from a sewage treatment plant and in the waters and sediments of ponds supplied with them. As the water passed through the pond system, a decrease of heavy metal concentrations in the post-treatment sewage water supplying the ponds was observed. The highest concentrations of heavy metals were found in the outflow from the sewage treatment plant and lower concentrations were observed in the water of pond 1 (except for Zn), which was the direct receiver of post-treatment sewage, while the lowest values were noted in the final pond. The concentration of heavy metals in the sediments decreased in consecutive ponds. The highest concentrations were determined in the sediment of pond 1 that received the post-treatment sewage * Corresponding author: katemel@uwm.edu.pl DOI 10.2478/v10009-009-0051-3Original research paper directly from the sewage treatment outflow, whereas the lowest values were estimated in the sediments of pond number 4, which was the final pond in the system.
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