Researchers Takeru Kodama and Huỳnh Quang Thiện participated in Shizuoka Prefecture's yellow eel survey at Lake Hamana.

On Friday, June 6, 2025, researchers Takeru Kodama and Huỳnh Quang Thiện from the Institute of Freshwater Biology participated in a yellow eel collection survey at the mouth of the Miyakoda River in Hamamatsu City, Shizuoka Prefecture. The survey was carried out jointly with researchers from the Lake Hamana Branch of the Shizuoka Prefectural Fisheries and Marine Technology Research Institute.

The Lake Hamana Branch regularly conducts these surveys to collect morphological and ecological data, such as body size and sex ratios of wild yellow eel populations, as well as genetic information, including DNA and RNA samples. At the Institute of Freshwater Biology, we will analyze this data to develop a practical method for determining the sex of eels based on RNA analysis. The foundation of this method was developed in recent years by Hsu et al. (2023).