Population genomics of marine fishes: identifying adaptive variation in space and time
- E. Nielsen, J. Hemmer-Hansen, P. F. Larsen, D. Bekkevold
- BiologyMolecular Ecology
- 1 August 2009
A review of achievements in marine fish genomics to date and potential avenues for future research, which will provide both general insights into evolution in high gene flow species, as well as specific knowledge which can lead to improved management of marine organisms are highlighted.
Application of SNPs for population genetics of nonmodel organisms: new opportunities and challenges
- S. Helyar, J. Hemmer-Hansen, E. Nielsen
- BiologyMolecular Ecology Resources
- 10 January 2011
Common issues when employing SNP markers are discussed, including the high numbers of markers typically employed, the effects of ascertainment bias and the inclusion of nonneutral loci in a marker panel.
Environmental selection on transcriptome‐derived SNPs in a high gene flow marine fish, the Atlantic herring (Clupea harengus)
- M. Limborg, S. Helyar, D. Bekkevold
- Environmental Science, BiologyMolecular Ecology
- 1 August 2012
The results reveal a complex pattern of varying spatial genetic variation among outlier loci, likely reflecting adaptations to local environments in a highly vagile species, and emphasize the need to preserve functionally important biodiversity.
Marine landscapes and population genetic structure of herring (Clupea harengus L.) in the Baltic Sea
- H. JØrgensen, M. M. Hansen, D. Bekkevold, D. Ruzzante, V. Loeschcke
- Environmental ScienceMolecular Ecology
- 1 September 2005
Application of a novel method for detecting barriers to gene flow by combining geographical coordinates and genetic differentiation allowed us to identify two zones of lowered gene flow that were concordant with the separation of the Baltic Sea into major basins, with environmental gradients and with differences in migration behaviour.
Biocomplexity in a highly migratory pelagic marine fish, Atlantic herring
- D. Ruzzante, S. Mariani, G. Carvalho
- Environmental ScienceProceedings of the Royal Society B: Biological…
- 22 June 2006
Evidence of correlated genetic and life history differentiation in an abundant and highly migratory pelagic fish, Atlantic herring, Clupea harengus, in the North Sea and adjacent areas is described and suggests the existence of more complex patterns of intraspecific diversity than was previously recognized.
Disentangling the Effects of Evolutionary, Demographic, and Environmental Factors Influencing Genetic Structure of Natural Populations: Atlantic Herring as a Case Study
- O. Gaggiotti, D. Bekkevold, D. Ruzzante
- Environmental ScienceEvolution; international journal of organic…
- 1 November 2009
The genetic signal left by the demographic history of herring seems to have been largely eroded, which is not surprising given the large reproductive potential and presumed enormous local effective population sizes of pelagic fish that constrain the effect of stochastic processes.
ENVIRONMENTAL CORRELATES OF POPULATION DIFFERENTIATION IN ATLANTIC HERRING
- D. Bekkevold, C. André, D. Ruzzante
- Environmental Science, BiologyEvolution; international journal of organic…
- 1 December 2005
It is shown that reproductive isolation can be maintained in marine fish populations exhibiting substantial mixing during larval and adult life stages, and analyses incorporating genetic, spatial, and environmental parameters indicated that isolating mechanisms are associated with the specific salinity conditions on spawning locations.
A genomic island linked to ecotype divergence in Atlantic cod
- J. Hemmer-Hansen, E. Nielsen, G. Carvalho
- BiologyMolecular Ecology
- 1 May 2013
The results suggest that ‘genomic mosaics’ of differentiation may even be found under high levels of gene flow and that marine fishes may provide insightful model systems for studying and identifying initial targets of selection during ecological divergence.
Long‐term effective population sizes, temporal stability of genetic composition and potential for local adaptation in anadromous brown trout (Salmo trutta) populations
- M. M. Hansen, D. Ruzzante, E. Nielsen, D. Bekkevold, K. L. Mensberg
- Environmental ScienceMolecular Ecology
- 1 December 2002
The requirements for local adaptation were fulfilled, but only adaptations resulting from strong selection were expected to occur at the level of individual populations, and the documented recent declines of many other anadromous brown trout populations may affect the persistence of local adaptation.
Gene-associated markers provide tools for tackling illegal fishing and false eco-certification.
- E. Nielsen, A. Cariani, G. Carvalho
- BiologyNature Communications
- 22 May 2012
By using gene-associated single nucleotide polymorphisms, individual marine fish can be assigned back to population of origin with unprecedented high levels of precision, and application of gene- associated markers will likely revolutionize origin assignment and become highly valuable tools for fighting illegal fishing and mislabelling worldwide.
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