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<p>We studied the concentration of hexachlorocyclohexane (HCH) and isomers in blood samples of American kestrels (<i>Falco sparverius</i>) during the non-breeding season in agricultural fields across two states of central Mexico. The majority of the 36 kestrels we sampled were females (72%). In both, Tlaxcala and Hidalgo, the mean concentrations of ∑HCH were 0.07&#xa0;µg/mL, and the presence of this contaminant did not vary between sexes, nor within or between states. We also detected the isomers β-HCH and γ-HCH (lindane) in most samples (97 and 80%, respectively), while α-HCH was the only other isomer found in a single sample. Our results confirm the presence of HCH in the non-breeding, overwintering populations of American kestrels in central Mexico. This report warrants further investigation of the timing, sources, and intake pathways of these contaminants in this migratory raptor.</p>

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Hexachlorocyclohexane in Non-breeding Populations of American Kestrel (Falco sparverius) in Central Mexico

  • 期刊论文

  • 发表日期：

    2025年6月14日

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  • Lilian G. Crisanto-Téllez,
  • Guillermo Espinosa-Reyes,
  • Felipe Ascencio,
  • Jaime Rendón-von Osten,
  • Begoña Jiménez,
  • Ricardo Rodríguez-Estrella,
  • Ernesto Ruelas Inzunza

摘要

We studied the concentration of hexachlorocyclohexane (HCH) and isomers in blood samples of American kestrels (Falco sparverius) during the non-breeding season in agricultural fields across two states of central Mexico. The majority of the 36 kestrels we sampled were females (72%). In both, Tlaxcala and Hidalgo, the mean concentrations of ∑HCH were 0.07 µg/mL, and the presence of this contaminant did not vary between sexes, nor within or between states. We also detected the isomers β-HCH and γ-HCH (lindane) in most samples (97 and 80%, respectively), while α-HCH was the only other isomer found in a single sample. Our results confirm the presence of HCH in the non-breeding, overwintering populations of American kestrels in central Mexico. This report warrants further investigation of the timing, sources, and intake pathways of these contaminants in this migratory raptor.