Cristin-prosjekt-ID: 303870
Sist endret: 14. januar 2015, 16:23

Cristin-prosjekt-ID: 303870
Sist endret: 14. januar 2015, 16:23
Prosjekt

Linking physics and biology – Structuring of cod-populations in the North Sea/Skagerrak water-system

prosjektleder

Nils Christian Stenseth
ved Centre for Ecological and Evolutionary Synthesis ved Universitetet i Oslo

prosjekteier / koordinerende forskningsansvarlig enhet

  • Centre for Ecological and Evolutionary Synthesis ved Universitetet i Oslo

Tidsramme

Avsluttet
Start: 1. januar 2007 Slutt: 31. mars 2010

Beskrivelse Beskrivelse

Tittel

Linking physics and biology – Structuring of cod-populations in the North Sea/Skagerrak water-system

Vitenskapelig sammendrag

We propose to study the physical and biological mechanisms that generate and maintain a highly geneticallystructured population of cod in the Skagerrak water system. We hypothesize that acombination of oceanographic features (i.e., within fjords water circulation), spawning behavior (i.e. strongphylopatry), and ecological traits (i.e. lower mortality of locally retained early-life stages) contribute to maintain theobserved genetic differentiation of the returning adults. It is thus proposed to (1) study the inflow of North-Sealarvae to Norwegian Skagerrak fjords with focus on linking physics with population structure and dynamics, and (2) to study the maintenance of costal cod populations within fjords focusing on linking physics, behavior and biology.Issue (1) involves improving models of the linkages between North Sea spawning cod and local fjord populations ofcod in the Skagerrak,explicitly considering the sub-structuring of the North Sea cod population and the variability of the oceanicdynamics. Issue (2) involves a detailed field study of spawning site selection, egg retention, larval drift, and currentpatterns in two representative fjords, to understand the mechanisms for maintaining local populations. Furthermoreissue (2) requires developing and analyzing evolutionary and physical models to assess the degree to whichmature coastal cod spawn at optimal sites so as tomaximize the probability of the spawning products staying within the fjord given the dynamics of the local watermasses. Our proposed work, besides being highly relevant to manage an economically important Norwegianresource, also has broader ecological relevance, in that it addresses an issue at the core of evolutionary biology:the generation and maintenance of genetic structure in marine fish populations

prosjektdeltakere

prosjektleder
Aktiv cristin-person

Nils Christian Stenseth

  • Tilknyttet:
    Prosjektleder
    ved Centre for Ecological and Evolutionary Synthesis ved Universitetet i Oslo
Aktiv cristin-person

Anne Maria Eikeset

  • Tilknyttet:
    Prosjektdeltaker
    ved Det matematisk-naturvitenskapelige fakultet ved Universitetet i Oslo
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