stress induced by heavy metals on breeding of magpie (pica pica) from central iran.the aim of this study was to address the impacts of some heavy metals (cd, pb, zn, ni and cu) contamination on laying behavior, egg quality and breeding performance of pica pica in north of isfahan province, iran. during the breeding season of 2013, magpie's egg content and eggshell as well as nestling excrements and feathers were collected and total concentrations of heavy metals were measured by icp-oes. except for zn in nestling feathers, the significantly higher concentrations of heavy metal ...201728499128
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