Northwest Fisheries Science Center

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Document Type: Journal Article
Center: NWFSC
Document ID: 1084
Title: Detecting population recovery using gametic-disequilibrium based effective population size estimates
Author: David A. Tallmon, Robin S. Waples, David P. Gregovich, Michael K. Schwartz
Publication Year: 2012
Journal: Conservation Genetics Resources
Volume: 4
Issue: 4
Pages: 987-989
Keywords: abundance, effective populaton size, genetic monitoring, population recovery, population size, population trend,

Recovering populations often must meet specific growth rate or abundance targets before their legal status can be changed from endangered or threatened. While the efficacy, power, and performance of population metrics to infer trends in declining populations has received considerable attention, how these same metrics perform when populations are increasing is less clear. We examined the ability of a one-sample effective population size (Ne) estimator (LDNe) to discriminate between stable and increasing population trends across varying sample and initial population sizes. The performance of LDNe was compared to the Lincoln-Peterson (LP) abundance (N) estimator. The ability to identify stable and increasing populations varied widely across sample sizes and number of generations between sequentially collected samples, but LDNe outperformed LP. One-sample Ne estimates show promise as an efficient method of detecting population increase when samples of 60–120 individuals are collected 5–10 generations apart.

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Theme: Recovery, Rebuilding and Sustainability of Marine and Anadromous Species
Foci: Develop methods to use physiological and biological information to predict population-level processes.
Characterize vital rates and other demographic parameters for key species, and develop and improve methods for predicting risk and viability/sustainability from population dynamics and demographic information.