I have two independent datasets of voles’ detection data, one from live-trapping and the other from non-invasive genetics of fecal samples. The main objective of this study was to compare both methods to evaluate the use of noninvasive genetics to estimate population densities of small mammals.
Both datasets were analyzed with secr independently, the trap data using a model for multi-catch traps and the noninvasive genetics data using polygon detectors with detections modeled as counts, both with exponential detection functions.
Other than comparing the density estimates obtained from each method, i would also like to compare detectability parameters, especially g0, but i am not confident if this comparison can be made in such a direct manner (as in detectability is more than 10 times higher for noninvasive genetics (g0 = 0.07) than for trapping data (g0 = 0.0036)). If this straightforward comparison cannot be made, is there any way to make the detection parameters comparable between both methods?
Thanks in advance,