Can DNA from a species of fish that no longer lives in a watercourse, remain in the habitat for some time and bias the results?

Created by: Andrew White

Modified on: Fri, 21 Dec, 2018 at 11:40 AM

Generally, eDNA persists in the environment for a short time. The duration is dependent on environmental conditions but is quantified, in standard conditions, between 4-58 days. 

So within this time frame, it is still possible to determine the presence of fish species that may no longer be present in the watercourse.

Andrew is the author of this solution article.

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