Ichiro Tayasu

This study uses radiocarbon dating of eye lenses in birds and mammals to reconstruct long-term chronological information, finding that mammalian lenses span years of life while avian lenses cover several years to decades.

This study investigates the extinction of Japanese river otters by analyzing their reliance on marine-derived resources through sulfur isotopes, linking habitat degradation to their decline.

This study introduces a method to reconstruct brown bear dietary history using eye lens isotopes, showing age-related dietary shifts and corn consumption patterns.

This study uses isotope analysis of bird eye lenses to reconstruct early-life dietary and environmental history, showing that lens isotopes reflect prenatal and postnatal diet changes.

This study shows that seasonal changes in plant physiology affect the hydrogen isotope ratios in maize leaves and insect tissues, influencing the interpretation of water-source estimates in insects.