Considering sampling bias in close-kin mark-recapture (CKMR) abundance estimates of Atlantic salmon S. Wacker, H. Skaug, T. Forseth, Ø. Solem, E. Ulvan, P. Fiske, S. Karlsson File 1: Wacker_2021_CKMR_adults.csv Data on sampled adults used for the estimation of 2018 spawner abundance in River Vigda by close-kin mark-recapture. Columns: adult_id: individual id offspring_assigned: number of sampled offspring assigned in parentage analysis sampling: sampling method; spawning survey (L), PIT tag (P) or both (PL) zone: river zone sex: sex by phenotype or genetic sexing length: total length [mm] sea_age: sea age [years] File 2: Wacker_2021_CKMR_juveniles.csv Data on sampled juveniles used for the estimation of 2018 spawner abundance in River Vigda by close-kin mark-recapture. Columns: id: individual id station: electrofishing sampling station zone: river zone File 3: Wacker_2021_CKMR_genotypes.csv Genotypes (164 SNP markers) of adult and juvenile Atlantic salmon used for the estimation of 2018 spawner abundance in River Vigda by close-kin mark-recapture. Missing data is coded as 0. Columns: id: individual id type: type of sample; juvenile, adult spawning survey (survey), adult PIT tag (PIT)