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<p>Trace elements like zinc can pose risks to wildlife and ecosystems when they accumulate at high concentrations. However, studies on zinc transfer from prey to waterbirds—particularly storks—remain scarce. We investigated zinc transfer to Asian Openbill (<i>Anastomus oscitans</i>) hatchlings from their prey species, <i>Filopaludina</i> spp. and <i>Pila</i> spp., collected from various habitats in eastern Nepal between May and October 2022. Zinc concentrations varied among both prey and hatchlings, with the highest levels recorded in <i>Filopaludina</i> spp. (88 ± 6.3&#xa0;mg/kg) and Asian Openbill hatchlings (62.3 ± 1.9&#xa0;mg/kg) at Rangeli in Morang district. Zinc levels in Asian Openbill hatchlings were significantly lower than in their prey, but a positive correlation suggests potential transfer through the food chain. Although zinc concentrations were below known toxicity thresholds, continued agrochemical use and industrial contamination may increase accumulation and eventually affect stork health.</p>

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Potential transfer of zinc from molluscs to Asian openbill hatchlings in Eastern Nepal

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年7月10日

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  • Ganesh Tamang,
  • Nanda Bahadur Singh,
  • Asmit Subba,
  • Hem Bahadur Katuwal

摘要

Trace elements like zinc can pose risks to wildlife and ecosystems when they accumulate at high concentrations. However, studies on zinc transfer from prey to waterbirds—particularly storks—remain scarce. We investigated zinc transfer to Asian Openbill (Anastomus oscitans) hatchlings from their prey species, Filopaludina spp. and Pila spp., collected from various habitats in eastern Nepal between May and October 2022. Zinc concentrations varied among both prey and hatchlings, with the highest levels recorded in Filopaludina spp. (88 ± 6.3 mg/kg) and Asian Openbill hatchlings (62.3 ± 1.9 mg/kg) at Rangeli in Morang district. Zinc levels in Asian Openbill hatchlings were significantly lower than in their prey, but a positive correlation suggests potential transfer through the food chain. Although zinc concentrations were below known toxicity thresholds, continued agrochemical use and industrial contamination may increase accumulation and eventually affect stork health.