A Model of an Internally Supplemented Population
- 1 May 1994
- journal article
- Published by Oxford University Press (OUP) in Transactions of the American Fisheries Society
- Vol. 123 (3) , 277-288
- https://doi.org/10.1577/1548-8659(1994)123<0277:amoais>2.3.co;2
Abstract
A model of the combined abundance and stock productivity of wild and hatchery spawners was developed as a tool to analyze the use of an internal form of stock supplementation to rebuild depressed populations. The model incorporated five key variables: Abundance and productivity of the wild spawners, abundance and productivity of the hatchery spawners, and the proportion of hatchery spawners. The model assumes discrete generations, a hatchery stock that is taken solely from the wild stock, and no genetic change during hatchery culture. Quantitative analyses delineated the existence of specific combinations of variables that will result in rebuilding the abundance and maintaining the genetic diversity of depressed populations. The model can be used as a tool for screening proposed supplementation projects and evaluating the performance of ongoing projects.Keywords
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