Roe Deer (Capreolus capreolus) Hair as a Bioindicator for the Environmental Presence of Toxic and Trace Elements

The return to pasture use as an alternative to intensive livestock farming implies some riskswith the lack or the excessive presence of potentially toxic elements; in this regard, wild animals havebeen used as bioindicators for decades. Thus, the purpose of this study is quantifying Cu, Cr, Mn, Zn, Se,As, Cd, Ni, Pb, Al, Fe, and Mg in fur from roe deer and understanding if it is a valid bioindicator tool.Hair was collected from 39 hunted roe deer and divided by age (<36 months old/≥36 months old), sex(male/female), and area of origin (urbanized/rural area). The mean concentrations of Fe, Mg, Mn, Al, Cr,and Pb were higher (p < 0.05) in the urbanized group; the mean levels of Mg and Cr were higher (p < 0.05)in older animals; and Cu, Fe, Mg, Cd, and Cr showed a higher accumulation in females. Our findingsshowed an age-related variation of elements, with higher concentrations in adult animals and females. Inconclusion, our findings prove that hair is a valid matrix for this type of survey, and wild animals are goodbioindicators for monitoring the presence of trace elements in pastures.