Combination of genetics and spatial modelling highlights the sensitivity of cod (Gadus morhua) population diversity in the North Sea to distributions of fishing

Michael Heath, Mark Culling, Walter Crozier, Clive Fox, William Gurney, William Hutchinson, Einar Nielsen, Martha O'Sullivan, Katharine Preedy, David Righton, Douglas Speirs, Martin Taylor, Peter Wright, Gary Carvalho

Research output: Contribution to journalArticle

27 Citations (Scopus)

Abstract

Conserving genetic diversity in animal populations is important for sustaining their ability to respond to environmental change. However, the ‘between-population’ component of genetic diversity (biocomplexity) is threatened in many exploited populations, particularly marine fish, where harvest management regions may be larger than the spatial extent of genetically distinct sub-populations. Using single nucleotide polymorphism (SNP) data we delineated the geographic limits of three population units of Atlantic cod (Gadus morhua) in northwest European waters. Two of the populations co-habit the North Sea, and trawl survey data showed differing trends in their abundances. We developed a spatial model of these units to simulate population dynamics under spatial patterns of harvesting, Competition between units during the pelagic juvenile stages in the model led to suppression of the more localised northern North Sea (Viking) unit by the more widespread (Dogger) unit, and its premature extinction under some spatial patterns of fishing. Fishery catch limits for cod are set at the scale of the whole North Sea without regard to such sub-population dynamics. Our model offers a method to quantify adjustments to regional fishing mortality rates to strike a balance between maximising sustainable yield and conserving vulnerable populations.
LanguageEnglish
Pages794-807
Number of pages14
JournalICES Journal of Marine Science
Volume71
Issue number4
Early online date17 Nov 2013
DOIs
Publication statusPublished - 2014

Fingerprint

Spatial Modeling
Population Diversity
cod (fish)
Gadus morhua
North Sea
fishing
subpopulation
population dynamics
modeling
Unit
fishing mortality
Spatial Pattern
Population Dynamics
environmental change
polymorphism
extinction
fishery
mortality
Fisheries
genetic variation

Keywords

  • cod population diversity
  • fishing
  • biocomplexity
  • single nucleotide polymorphism
  • model
  • North Sea

Cite this

Heath, Michael ; Culling, Mark ; Crozier, Walter ; Fox, Clive ; Gurney, William ; Hutchinson, William ; Nielsen, Einar ; O'Sullivan, Martha ; Preedy, Katharine ; Righton, David ; Speirs, Douglas ; Taylor, Martin ; Wright, Peter ; Carvalho, Gary. / Combination of genetics and spatial modelling highlights the sensitivity of cod (Gadus morhua) population diversity in the North Sea to distributions of fishing. In: ICES Journal of Marine Science. 2014 ; Vol. 71, No. 4. pp. 794-807.
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Heath, M, Culling, M, Crozier, W, Fox, C, Gurney, W, Hutchinson, W, Nielsen, E, O'Sullivan, M, Preedy, K, Righton, D, Speirs, D, Taylor, M, Wright, P & Carvalho, G 2014, 'Combination of genetics and spatial modelling highlights the sensitivity of cod (Gadus morhua) population diversity in the North Sea to distributions of fishing' ICES Journal of Marine Science, vol. 71, no. 4, pp. 794-807. https://doi.org/10.1093/icesjms/fst185

Combination of genetics and spatial modelling highlights the sensitivity of cod (Gadus morhua) population diversity in the North Sea to distributions of fishing. / Heath, Michael; Culling, Mark; Crozier, Walter; Fox, Clive; Gurney, William; Hutchinson, William; Nielsen, Einar; O'Sullivan, Martha; Preedy, Katharine; Righton, David; Speirs, Douglas; Taylor, Martin; Wright, Peter; Carvalho, Gary.

In: ICES Journal of Marine Science, Vol. 71, No. 4, 2014, p. 794-807.

Research output: Contribution to journalArticle

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AU - Culling, Mark

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AU - Fox, Clive

AU - Gurney, William

AU - Hutchinson, William

AU - Nielsen, Einar

AU - O'Sullivan, Martha

AU - Preedy, Katharine

AU - Righton, David

AU - Speirs, Douglas

AU - Taylor, Martin

AU - Wright, Peter

AU - Carvalho, Gary

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