What is the purpose of a control sample that is known to be from bighead carp in edna surveillance for bighead carp?

The purpose of a control sample known to be from bighead carp in environmental DNA (eDNA) surveillance is to establish a baseline for comparison, ensuring the accuracy and reliability of test results. It helps validate the detection methods used and confirms that the analytical processes can accurately identify the genetic material of bighead carp. This control also aids in assessing potential contamination or false positives in the samples being tested. Ultimately, it enhances the robustness of the surveillance program for monitoring bighead carp populations.