Two reanalyzed datasets from a coastal marine bay and a large river, quantifying environmental DNA (eDNA) concentrations at different fragment lengths. The data, authored by Toshiaki Jo and last updated in May 2026, compares eDNA measurements with fish abundance estimates from hydroacoustic surveys and physical capture data. The 31.9 KB dataset includes R and CSV files and is licensed under CC-BY-4.0.
Use Cases
- Improving fish population abundance estimation models based on eDNA fragment length ratios (freshness index).
- Comparing eDNA-based abundance inference methods across different aquatic systems (coastal bay vs. large river).
- Evaluating strategies to reduce background noise in eDNA analysis without detailed hydrodynamic modeling.
- Assessing the effect of mitochondrial marker placement and amplicon length on eDNA persistence models.
Strengths
- Data is derived from two contrasting natural systems, allowing for cross-environmental comparison.
- Includes comparisons with established abundance estimation methods (hydroacoustic surveys, physical capture).
- Published under a permissive CC-BY-4.0 license, enabling broad reuse.
- Last updated date is explicitly provided (2026-05-01).
Limitations
- Row count and column-level documentation are unknown, requiring manual inspection after download.
- The dataset is very small (31.9 KB), indicating limited scope.
- The description notes that further research is required to evaluate the generality and applicability of the method.
Provenance
- Source
- figshare, authored by Toshiaki Jo.
- Collection Method
- Reanalysis of two previously published datasets where eDNA concentrations were quantified and compared with population abundance estimates.
- Time Range
- null
- Freshness
- Last updated 2026-05-01 12:45:58
- Geography
- A coastal marine bay and a large river (specific locations not named).