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Life history of fjord cod from the Skagerrak in the mid-2000s compared to 1905
(Journal article; Peer reviewed, 2011-03-01)
Life history changes serve as stress indicators in harvested populations. Data from recent decades show that many species of marine fish are now maturing at younger ages and smaller sizes, associated with a general increase ...
Egg distribution, bottom topography and small-scale cod population structure in a coastal marine system
(Journal article; Peer reviewed, 2007-03-12)
Coastal marine species with pelagic egg and larval stages, such as the Atlantic cod Gadus morhua, can be structured into genetically distinct local populations on a surprisingly small geographic scale considering their ...
New perspectives on fish movement: kernel and GAM smoothers applied to a century of tagging data on coastal Atlantic cod
(Journal article; Peer reviewed, 2008-12-09)
Tagging–recovery studies have been used successfully on many occasions, and the data analysed in a variety of ways with respect to fish movement. Here we provide a synoptic account of useful statistical techniques for ...
Small-scale genetic structure in a marine population in relation to water circulation and egg characteristics
(Journal article; Peer reviewed, 2010-10)
Until the last decade it was assumed that most marine species have pronounced gene flow over vast areas, largely because of their potential for dispersal during early life stages. However, recent genetic, modeling, and ...
Are low but statistically significant levels of genetic differentiation in marine fishes ‘biologically meaningful’? A case study of coastal Atlantic cod
(Journal article; Peer reviewed, 2010-12-29)
A key question in many genetic studies on marine organisms is how to interpret a low but statistically significant level of genetic differentiation. Do such observations reflect a real phenomenon, or are they caused by ...
Spatial scale of genetic structuring in coastal cod Gadus morhua and geographic extent of local populations
(Journal article; Peer reviewed, 2007-08-07)
We estimated the spatial scale of genetically distinguishable populations of coastal Atlantic cod Gadus morhua using microsatellite DNA markers. Significant overall heterogeneity in allele frequencies was found among 5 cod ...