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<p>This study investigated sixteen trace elements in the yolk and albumen of loggerhead turtle (<i>Caretta caretta</i>) eggs from nesting sites along the Campanian coastline (Southern Italy). The elements included both essential (Co, Cu, Mn, Fe, Se, Zn) and non-essential (As, Cd, Cr, Ga, Hg, Ni, Pb, Rb, Sr, V) ones. In the Principal Component Analysis (PCA), the essential elements were associated with each other and explained nearly 100% of the dataset variability, underscoring their fundamental biochemical roles and maternal transfer through shared physiological pathways. Conversely, non-essential elements showed weaker correlations, suggesting exogenous and potentially hazardous origins. Their presence in the eggs appears to be maternally derived, as females typically do not feed during the nesting period. Consequently, the element burdens in the eggs mainly reflect maternal contaminant exposure in foraging areas, particularly for Ni and V. These findings indicate that egg deposition represents a minor detoxification pathway for adult females.</p>

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Trace Element Concentrations in Albumen and Yolk of Caretta caretta Eggs from Nests Along the Coast of Southern Italy: Analysis and Correlation Study

  • 期刊论文

  • 发表日期：

    2026年4月17日

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  • Angela Pepe,
  • Roberto Miniero,
  • Silvia Canzanella,
  • Fulvio Maffucci,
  • Sandra Hochscheid,
  • Mauro Esposito

摘要

This study investigated sixteen trace elements in the yolk and albumen of loggerhead turtle (Caretta caretta) eggs from nesting sites along the Campanian coastline (Southern Italy). The elements included both essential (Co, Cu, Mn, Fe, Se, Zn) and non-essential (As, Cd, Cr, Ga, Hg, Ni, Pb, Rb, Sr, V) ones. In the Principal Component Analysis (PCA), the essential elements were associated with each other and explained nearly 100% of the dataset variability, underscoring their fundamental biochemical roles and maternal transfer through shared physiological pathways. Conversely, non-essential elements showed weaker correlations, suggesting exogenous and potentially hazardous origins. Their presence in the eggs appears to be maternally derived, as females typically do not feed during the nesting period. Consequently, the element burdens in the eggs mainly reflect maternal contaminant exposure in foraging areas, particularly for Ni and V. These findings indicate that egg deposition represents a minor detoxification pathway for adult females.