| organochlorine and heavy-metal contaminants in wild mammals and birds of urbino-pesaro province, italy: an analytic overview for potential bioindicators. | tissue samples from 56 bird and 11 mammal species of different trophic levels, collected from 1994 to 1995 from the urbino-pesaro area in the marche region of central italy, were analyzed for the presence of organochlorine compounds (polychlorinated biphenyls and p,p'-dde) and heavy metals (pb, cd, cr, and hg). results revealed interspecies differences in pollutant residue concentrations. a clear relationship between contaminant and trophic levels emerged depending on several factors specific to ... | 2006 | 16418892 |