- Cities prohibit men and women where cams never ever performed, and you will imply sampling months for every single venue and you may cam-days is simply days when cameras performed and weren’t went along to because of the researchers. Including revealed was numbers of cam-months subsampled off for every single subset (100 haphazard examples of for each and every size had been chose regarding for every particular data lay; select Material and methods).
- † Types from subsamples of digital camera-months (thousands).
The empirical, design-based variance of densities estimated by CTDS includes components for both detection probability and encounter rate (Fewster et al. 2009 ). 2009 , Howe et al. 2017 ). Therefore, to simplify the analyses of the many subsets of the data, we did not estimate density, and we ignored the detection probability component of the variance. Rather, for each subsample of camera-days, we calculated the encounter rate as the total number of observations of animals (n) divided by the total effort (as the sum of ek of Eq. 1 across all days and locations included in the subsample; Fewster et al. 2009 :230), and the variance of the encounter rate as var ^ p 2 of Fewster et al. ( 2009 ). Continua a leggere
