Data from: Mature male parr contribution to the effective size of an anadromous Atlantic salmon (Salmo salar) population over 30 years

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Title Ecological and Microsatellite data
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Description This tab-delimited file contains all the allele scores for 869 samples across 13 microsatellites, along with the relevant demographic data.
At the request of the author, this item is embargoed until the associated article is published.
Title Parr sampling data
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Description This is field-recorded data of the sex, maturity and measurements of 100 parr. Some parr were too small and could not be sexed in the field. Sampling occurred via electrofishing in collaboration with the Department of Fisheries and Oceans, St. John's, Newfoundland.
At the request of the author, this item is embargoed until the associated article is published.

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Citation is not yet available for this article from Molecular Ecology. It will become available shortly after the article is published.

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Johnstone DL, O'Connell MF, Palstra FP, Ruzzante DE (2012) Data from: Mature male parr contribution to the effective size of an anadromous Atlantic salmon (Salmo salar) population over 30 years. Dryad Digital Repository. doi:10.5061/dryad.624k0
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DOI doi:10.5061/dryad.624k0
Pageviews 96
Keywords Conservation Genetics, Population Genetics - Empirical, Life History Evolution, Effective Population Size, Atlantic salmon, Fish
Date Submitted 2012-12-13T20:12:06Z
Scientific Names Salmo salar
Spatial Coverage Northeast Brook Trepassey, Newfoundland, Canada, 46°46’ N, 53°21’ W
Abstract
We describe temporal changes in the genetic composition of a small anadromous Atlantic salmon (Salmo salar) population from South Newfoundland, an area where salmon populations are considered Threatened (COSEWIC 2010). We examined the genetic variability (13 microsatellite loci) in 869 out-migrating smolt and post-spawning kelt samples, collected from 1985 to 2011 for a total of 22 annual collections and a 30 year span of assigned cohorts. We estimated the annual effective number of breeders (Nb) and the generational effective population size (Ne) through genetic methods and demographically using the adult sex ratio. Comparisons between genetic and demographic estimates show that the adult spawners inadequately explain the observed Ne estimates, suggesting that mature male parr are significantly increasing Nb and Ne over the study period. Spawning as parr appears to be a viable and important strategy in the near absence of adult males.

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