<i>Corvus macrorhynchos</i> foraging for silicone materials: Evidence from DNA analysis of pellets

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  • YAJI Kohei
    Electric Power Engineering Research Laboratory, Central Research Institute of Electric Power Industry
  • MATSUKI Rikyu
    Environmental Science Research Laboratory, Central Research Institute of Electric Power Industry
  • KITAMURA Wataru
    Environmental Science Research Laboratory, Central Research Institute of Electric Power Industry
  • KUROYAGI Toshiyuki
    Electric Power Engineering Research Laboratory, Central Research Institute of Electric Power Industry
  • ADACHI Kazuo
    Electric Power Engineering Research Laboratory, Central Research Institute of Electric Power Industry

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  • ペリットのDNA解析が明らかにしたハシブトガラスのシリコーン採食
  • ペリット ノ DNA カイセキ ガ アキラカ ニ シタ ハシブトガラス ノ シリコーンサイショク
  • Corvus macrorhynchos foraging for silicone materials: Evidence from DNA analysis of pellets

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Description

A major problem facing outdoor electrical power apparatuses is that certain bird species peck at external polymeric insulation materials, such as silicone oil compounds and silicone rubber. In order to develop countermeasures and prevent electrical failure, we investigated this issue by performing Fourier transformed infrared (FT-IR) spectroscopy and DNA analysis of pellet fragments. The results showed good matching between base sequences of DNA from the pellet and that of Corvus macrorhynchos. The ingredients of the synthetic materials in the pellet corresponded to silicone oil compounds. We thus showed that C. macrorhynchos feeds on such silicone materials. Moreover, we suggest that the reason why birds feed on silicone materials differs from what has been hypothesized so far, i.e., seeking acid oils.

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