Cristin-resultat-ID: 1819870
Sist endret: 8. februar 2023, 14:14
NVI-rapporteringsår: 2020
Resultat
Vitenskapelig artikkel
2020

Influence of larval transport and temperature on recruitment dynamics of North Sea cod (Gadus morhua) across spatial scales of observation

Bidragsytere:
  • Giovanni Romagnoni
  • Kristina Øie Kvile
  • Knut Frode Dagestad
  • Anne Maria Eikeset
  • Trond Kristiansen
  • Nils Christian Stenseth
  • mfl.

Tidsskrift

Fisheries Oceanography
ISSN 1054-6006
e-ISSN 1365-2419
NVI-nivå 2

Om resultatet

Vitenskapelig artikkel
Publiseringsår: 2020
Volum: 29
Hefte: 4
Sider: 324 - 339
Open Access

Importkilder

Scopus-ID: 2-s2.0-85085137596

Beskrivelse Beskrivelse

Tittel

Influence of larval transport and temperature on recruitment dynamics of North Sea cod (Gadus morhua) across spatial scales of observation

Sammendrag

The survival of fish eggs and larvae, and therefore recruitment success, can be critically affected by transport in ocean currents. Combining a model of early‐life stage dispersal with statistical stock–recruitment models, we investigated the role of larval transport for recruitment variability across spatial scales for the population complex of North Sea cod (Gadus morhua). By using a coupled physical–biological model, we estimated the egg and larval transport over a 44‐year period. The oceanographic component of the model, capable of capturing the interannual variability of temperature and ocean current patterns, was coupled to the biological component, an individual‐based model (IBM) that simulated the cod eggs and larvae development and mortality. This study proposes a novel method to account for larval transport and success in stock–recruitment models: weighting the spawning stock biomass by retention rate and, in the case of multiple populations, their connectivity. Our method provides an estimate of the stock biomass contributing to recruitment and the effect of larval transport on recruitment variability. Our results indicate an effect, albeit small, in some populations at the local level. Including transport anomaly as an environmental covariate in traditional stock–recruitment models in turn captures recruitment variability at larger scales. Our study aims to quantify the role of larval transport for recruitment across spatial scales, and disentangle the roles of temperature and larval transport on effective connectivity between populations, thus informing about the potential impacts of climate change on the cod population structure in the North Sea.

Bidragsytere

Giovanni Romagnoni

  • Tilknyttet:
    Forfatter
    ved Centre for Ecological and Evolutionary Synthesis ved Universitetet i Oslo

Kristina Øie Kvile

  • Tilknyttet:
    Forfatter
    ved Centre for Ecological and Evolutionary Synthesis ved Universitetet i Oslo
  • Tilknyttet:
    Forfatter
    ved Woods Hole Oceanographic Institution

Knut-Frode Dagestad

Bidragsyterens navn vises på dette resultatet som Knut Frode Dagestad
  • Tilknyttet:
    Forfatter
    ved Meteorologisk institutt
Aktiv cristin-person

Anne Maria Eikeset

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

Trond Kristiansen

  • Tilknyttet:
    Forfatter
    ved Marin biogeokjemi og oseanografi ved Norsk institutt for vannforskning
1 - 5 av 7 | Neste | Siste »