The migration game in habitat network: the case of tuna

Patrizio Mariani, Vlastimil Krivan , Brian MacKenzie, Christian Mullon

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

Long-distance migration is a widespread process evolved independently in several animal groups in terrestrial and marine ecosystems. Many factors contribute to the migration process and of primary importance are
intra-specific competition and seasonality in the resource distribution. Adaptive migration in direction of increasing fitness should lead to the ideal free distribution (IFD) which is the evolutionary stable strategy of the habitat selection
game. We introduce a migration game which focuses on migrating dynamics leading to the IFD for age-structured populations and in time varying habitats, where dispersal is costly. The model predicts migration dynamics between
these habitats and the corresponding population distribution.
When applied to Atlantic bluefin tunas, it predicts their biomass is located in the spawning areas which have also the largest diversity in the age-structure. Distant feeding areas are occupied on a seasonal base and often by larger individuals,
in agreement with empirical observations. Moreover, we show that only a selected number of migratory routes emerge as those effectively used by tunas
Original languageEnglish
JournalTheoretical Ecology
Volume9
Issue number2
Pages (from-to)219-232
ISSN1874-1738
DOIs
Publication statusPublished - 2016

Keywords

  • Structured population
  • Ideal free distribution
  • Game theory
  • Habitat selection
  • Bluefin tuna

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