DOI: 10.5061/dryad.sn02v6xkm
title: Data and code from: Domestication-admixed Atlantic salmon (<em>Salmo salar</em>) establish a productive population in the wild

description: Widespread aquaculture escapes have led to domestication-admixture in many
 wild Atlantic salmon populations, widely regarded as a threat to their
 evolutionary trajectory and persistence amid historically low population
 numbers. Although decades of research document reduced fitness of
 domesticated-admixed offspring in the wild, productivity measurements of
 domestication-admixed or feral salmon populations are lacking. Over a
 10-year period, we document colonisation of a river by highly (average 37
 %) domestication-admixed salmon using up- and downstream traps, genomic
 data, and genetic identification of over 4000 spawners and smolts.
 Colonisers were identified as strays originating from admixed neighboring
 rivers. The resulting population now displays freshwater and marine
 productivity within ranges observed in wild populations. Our data
 therefore demonstrate that domestication-admixed individuals can rapidly
 establish populations in the wild, likely facilitated in this case by an
 absence of local competition. Furthermore, high levels of domestication
 admixture do not preclude a productive population trajectory.
description: The data in this Excel file includes all data used for the analyses
 described in the MS titled "Domestication-admixed Atlantic salmon
 (Salmo salar) establish a productive population within a single
 generation." Authors: Alison C. Harvey, Øystein Skaala, Francois
 Besnier, Britt Iren Østebø, Anne Grete Sørvik, Per Tommy Fjeldheim, Laila
 Unneland, Marine S. O. Brieuc, Fernando Ayllon, Kjell R. Utne, Monica F.
 Solberg, & Kevin A. Glover This manuscript was submitted to *Ecology
 Letters* in August 2025 ### Dataset descriptions: Code.R contains all the
 code needed to execute the figures and analyses. The ReadMe.txt file
 contains the same information as this file.  dataset1.csv is the data
 about the spawners: Each row is one spawner off.assign.csv is each
 offpsring (row) and whether it was assigned to a spawner parent for figure
 S3 (in the corresponding manuscript) spawnerN.csv is the number of
 spawners in each spawner year and whether that spawner was a recruit
 (identified as a smolt) for figure 2 smoltN.csv is the number of smolts in
 each smolt year class and whether that smolt was recruited as a spawner
 for figure 2 spawnerNall.csv is all the spawners that entered the river
 from 2000 to 2021for figure S2 MS.csv is the collated marine survival data
 for the supplementary figure S8 spawner.genetic.csv is the microsatellite
 data used to check for duplicated spawners in the dataset ### Variable
 descriptions: * dataset1.csv * ID: Unique identifier of each spawner *
 Date: Date on which the spawner entered the river * Year: Year of river
 entry Length Length of the spawner in cm * Weight: Weight of the spawner
 in kg * Admix: Admixture estimate of the spawner * Sex: Genetically
 determined sex of the spawner * OffN: Number of offspring assigned to the
 spawner * Repro: Reproductive success, yes = reproduced, no = did not
 reproduce * Rsucc: Reproductive success, 1 = reproduced, 0 = did not
 reproduce * River: River assigned to the spawner * Threshold: whether the
 river assignment was above or below the 0.80 probability of assignment
 threshold * off.assign.csv * OffspringID: Unique identifier of each
 offspring * Off.Year: Year of migration of the offspring * Assign: Whether
 the offspring was assigned to a parent or not * SpawnerN.csv * Year:
 Spawner year * Number Number of spawners in that year * Recruit How many
 were recruited from smolts * SmoltN.csv * Year Smolt year class * Recruit
 Number of smolts that were then recruited back to the river as spawners *
 Number Number of smolts in the smolt year class * SpanwerNall.csv * Fish
 number for each fish, continuous * Year Spawner year * MS.csv * SYC Smolt
 year class * MS The marine survival (proportion) * Origin Whether that
 population is wild or of hatchery origin * River Which river the data
 comes from * Age Which age the marine survival relates to (1 sea winter
 SW, 2 sea winter SW)