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IBSEM : An Individual-Based Atlantic Salmon Population Model

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Please use this identifier to cite or link to this item:http://hdl.handle.net/2115/64499

Title: IBSEM : An Individual-Based Atlantic Salmon Population Model
Authors: Castellani, Marco Browse this author
Heino, Mikko Browse this author
Gilbey, John Browse this author
Araki, Hitoshi Browse this author →KAKEN DB
Svåsand, Terje Browse this author
Glover, Kevin A. Browse this author
Issue Date: 18-Sep-2015
Publisher: Public Library of Science
Journal Title: PLoS One
Volume: 10
Issue: 9
Start Page: 0138444
Publisher DOI: 10.1371/journal.pone.0138444
Abstract: Ecology and genetics can influence the fate of individuals and populations in multiple ways. However, to date, few studies consider them when modelling the evolutionary trajectory of populations faced with admixture with non-local populations. For the Atlantic salmon, a model incorporating these elements is urgently needed because many populations are challenged with gene-flow from non-local and domesticated conspecifics. We developed an Individual-Based Salmon Eco-genetic Model (IBSEM) to simulate the demographic and population genetic change of an Atlantic salmon population through its entire life-cycle. Processes such as growth, mortality, and maturation are simulated through stochastic procedures, which take into account environmental variables as well as the genotype of the individuals. IBSEM is based upon detailed empirical data from salmon biology, and parameterized to reproduce the environmental conditions and the characteristics of a wild population inhabiting a Norwegian river. Simulations demonstrated that the model consistently and reliably reproduces the characteristics of the population. Moreover, in absence of farmed escapees, the modelled populations reach an evolutionary equilibrium that is similar to our definition of a ‘wild’ genotype. We assessed the sensitivity of the model in the face of assumptions made on the fitness differences between farm and wild salmon, and evaluated the role of straying as a buffering mechanism against the intrusion of farm genes into wild populations. These results demonstrate that IBSEM is able to capture the evolutionary forces shaping the life history of wild salmon and is therefore able to model the response of populations under environmental and genetic stressors.
Rights: https://creativecommons.org/licenses/by/4.0/
Type: article
URI: http://hdl.handle.net/2115/64499
Appears in Collections:農学院・農学研究院 (Graduate School of Agriculture / Faculty of Agriculture) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 荒木 仁志

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