DOI: 10.5061/dryad.vh942
title: Data from: Stock enhancement or sea ranching? Insights from monitoring the genetic diversity, relatedness and effective size in a seeded great scallop population (Pecten maximus)

description: The mass release of hatchery-propagated stocks raises numerous questions
 concerning its efficiency in terms of local recruitment and effect on the
 genetic diversity of wild populations. A seeding program, consisting of
 mass release of hatchery-produced juveniles in the local naturally
 occurring population of great scallops (Pecten maximus L.), was initiated
 in the early 1980s in the Bay of Brest (France). The present study aims at
 evaluating whether this seeding program leads to actual population
 enhancement, with detectable effects on genetic diversity and effective
 population size, or consists of sea ranching with limited genetic
 consequences on the wild stock. To address this question,
 microsatellite-based genetic monitoring of three hatchery-born and
 naturally recruited populations was conducted over a 5-year period.
 Results showed a limited reduction in allelic richness but a strong
 alteration of allelic frequencies in hatchery populations, while genetic
 diversity appeared very stable over time in the wild populations. A
 temporal increase in relatedness was observed in both cultured stock and
 wild populations. Effective population size (Ne) estimates were low and
 variable in the wild population. Moreover, the application of the
 Ryman-Laikre model suggested a high contribution of hatchery-born scallops
 to the reproductive output of the wild population. Overall, the data
 suggest that the main objective of the seeding program, which is stock
 enhancement, is fulfilled. Moreover, gene flow from surrounding
 populations and/or the reproductive input of undetected sub-populations
 within the bay may buffer the Ryman-Laikre effect and ensure the retention
 of the local genetic variability.
description: Pecten-Msat-GenotypesFile: Pecten-Msat-Genotype.xls Contain all the data in excel formating, ready to be converted by a software such as CREATE (Coombs et al. 2008) First sheet ("genotype_raw"): raw data (all individuals genotyped at all microsatellite loci) Each line is an individual animal.Each columns after population and individual identifier contain one allele. Both alleles for a given locus are given consecutively (see header row). For details on microatellites primers, PCR protocols and marker statistics please see Morvezen et al. 2013 and Morvezen et al. 2016 Population names are abbreviated in the publication for simplicity. Name equivalences Hatch=Hatchery=H Wild=W Second sheet ("genotypes_cleaned") Same as the first sheet minus indivudals with &gt;50% missing data. This is the dataset used as input for all analyses in the publication.Pecten-Msat-Genotype.xlsGenotype_clean-GENEPOPThis file contain the same data as the sheet "genotypes_clean" of the associated excel file, but in GENEPOP (Raymont & Rousset 1995) format. This is provided for convenience of use. Below are the equivalence of population names between files. POPULATION ID GENEPOP ID Hatch12 CAu001 Wild12 NAu001 Hatch07 PmE001 Hatch09 PmE166 Wild07 PmN001 Wild09 PmN101