Using eDNA techniques to find the endangered big-headed turtle (Platysternon megacephalum).

ABSTRACT: We evaluate the efficacy of environmental DNA (eDNA) techniques to locate wild populations and estimate the population size of the endangered big-headed turtle (Platysternon megacephalum) in Hong Kong. The results from this study are important for identifying priority sites for protection and further research. Additionally, we assess the impact of two environmental variables (temperature and pH) on eDNA quantity. We surveyed 34 streams for three years, sampling four times each year. Four new populations were first identified with eDNA analysis, and then verified by field surveys. Our multi-year survey highlights that eDNA detection can be inconsistent over time, even in streams with known populations. There was no significant relationship between eDNA quantity and the environmental variabl

SUBMITTER: Lam IPY 

PROVIDER: S-EPMC8820637 | biostudies-literature | 2022

REPOSITORIES: biostudies-literature