Spatial scale of genetic structuring in coastal cod Gadus morhua and geographic extent of local populations

By P. Jorde, H. Knutsen, S. Espeland, Nils Chr. Stenseth. 2007

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Fitness landscape of Atlantic cod shaped by harvest selection and natural selection (2011, background): “Population genetic studies have revealed a network of local cod populations in Skagerrak, sometimes separated by as little as 30 km of coastline (Knutsen et al. 2003; Jorde et al. 2007).”
Genetic isolation by distance and localized fjord population structure in Pacific cod (Gadus macrocephalus): limited effective dispersal in the northeastern Pacific Ocean (2009, background): “Similarly, the presence of shallow sills in Norwegian fjords appears to enhance local retention of Atlantic cod eggs (Knutsen et al. 2007), contributing to the development of localized populations (Olsen et al. 2004; Jorde et al. 2007).”
Fine-scale spatial and temporal genetic structure of Atlantic cod off the Atlantic coast of the USA (2010, background): “In Atlantic cod, local recruitment has been linked to fine-scale habitat associations (Bradbury et al. 2008) and egg and larval retention has been hypothesized as a mechanism promoting fine-scale genetic structure (Knutsen et al. 2003, 2007, Jorde et al. 2007).”