Northwest Fisheries Science Center

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Document Type: Journal Article
Center: NWFSC
Document ID: 1615
Title: A model of reproductive success for estimating the minimum number of offspring to sample in parentage studies
Author: J. H. Anderson, E. J. Ward, S. M. Carlson
Publication Year: 2011
Journal: Journal of Heredity
Volume: 102
Issue: 5
Pages: 567-576
DOI: doi: 10.1093/jhered/esr060
Keywords: power, Negative binomial, salmonid, sample size, reproductive success

 Molecular parentage permits studies of selection and evolution in fecund species with cryptic mating systems, such as fish, amphibians, and insects. However, there exists no method for estimating the number of offspring that must be assigned parentage to achieve robust estimates of reproductive success when only a fraction of offspring can be sampled. We constructed a 2-stage model that first estimated the mean (μ) and variance (v) in reproductive success from published studies on salmonid fishes and then sampled offspring from reproductive success distributions simulated from the μ and v estimates. Results provided strong support for modeling salmonid reproductive success via the negative binomial distribution and suggested that few offspring samples are needed to reject the null hypothesis of uniform offspring production. However, the sampled reproductive success distributions deviated significantly (χ

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The Northwest Fisheries Science Center (NWFSC) supports the conservation and management of living marine resources and their habitats in the Northeast Pacific Ocean.

Our research assists resource managers in making sound decisions that build sustainable fisheries, recover endangered and threatened species, sustain healthy ecosystems, and reduce risks to human health.