Zool Stud 2020 9;59:e17. Epub 2020 Jun 9.
Graduate School of Human Development and Environment, Kobe University, 3-11, Tsurukabuto, Nadaku, Kobe, Hyogo 657-8501, Japan. E-mail: (Sakata); (Minamoto).
Although populations of anguillid eels have declined remarkably in recent decades, monitoring data on the spatial and temporal variation in their dynamics are often limited, particularly for tropical eel species. As there are often sympatries of multiple eel species in tropical rivers, identifying eel species based solely on morphological characteristics is challenging. Basin-scale surveys were conducted in rivers of southern Japan and northern Taiwan to investigate (1) whether the spatial distribution, abundance, and biomass of the tropical eel species, the giant mottled eel (), can be monitored in rivers by comparing the results obtained from environmental DNA (eDNA) analysis with data from electrofishing and (2) the riverine distribution of the sympatric and the temperate eel species, the Japanese eel (), in this region using eDNA analysis. Read More