The influence of zinc on the accumulation of cadmium and copper in the terrestrial isopod Porcellio scaber (Crustacea, Isopoda) | Vpliv cinka na akumulacijo kadmija in bakra pri kopenskem enakono`žcu Porcellio scaber (Crustacea, Isopoda)

anglais. Relative to data derived from single-metal exposure not much is known about metal kinetics in terrestrial isopods exposed to a mixture of metals. In the work presented the accumulation pattern of Zn, Cd and Cu were studied in Porcellio scaber, one of the most investigated isopods. Animals were fed with hazel leaves dosed with single metals or their binary mixtures. After twenty-one days of exposure, food consumption and metal accumulation were measured. Results revealed that the accumulation of Zn is not affected by a decreased food consumption rate or by possible interactions between the mixture constituents. In contrast, the accumulation of Cd and Cu is significantly reduced when food is also contam- inated with Zn. The lower accumulation of Cd and Cu can be ascribed to interactions with Zn that affect uptake and/or loss of metals.

slovène. Kinetika kovinskih ionov pri kopenskih rakih enakono`žcih, ki so izpostavljeni zmesi kovin je, v nasprotju z izpostavitvijo le eni kovini, malo poznana. V predstavljenem delu smo spremljali akumulacijo cinka, kadmija in bakra pri kopenskem raku enakono`žcu vrste Porcellio scaber. Poskusne `živali smo hranili z listi leske, ki smo jim dodali raztopino ene ali pa zmes dveh kovin. Po enaindvajsetih dneh izpostavitve smo izmerili količine zaužite hrane in količino akumuli-ranih kovinskih ionov. Rezultati so pokazali, da na akumulacijo cinka ne vpliva upad prehranjevanja kakor tudi ne interakcije med kovinami v zmesi. Nasprotno je akumulacij kadmija in bakra značilno nižja ob sočasni prisotnosti cinka v hrani. Nižja akumulacija kadmija in bakra je posledica njune interakcije s cinkom, kar vpliva na manjši privzem ali pa večje izločanje kadmija in bakra iz telesa.