near-significantp = 0.063
The linear regressions to test whether spraint densities are good indicators for otter densities revealed a near-significant relationship between yearly spraint densities (numbers of genotyped samples per ha) and yearly numbers of distinct genotypes per ha (R 2 = 0.62, df = 4, p = 0.063, Fig 3 ), whereas there was no relationship between yearly spraint densities and yearly estimated individuals per ha (R 2 = 0.24, df = 4, p = 0.33, Fig 3 ).