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Phylogeography of the ocean quahog (Arctica islandica): influences of paleoclimate on genetic diversity and species range
Genetic subdivision in the ocean quahog is consistent with the hypothesis that a warm Holocene climatic optimum, and not glacial refugia, shaped the present-day genetic structure in A. islandica.
Power for detecting genetic divergence: differences between statistical methods and marker loci
Computer simulations are used to assess and evaluate power when testing for genetic differentiation at multiple loci through combining test statistics or P values obtained by four different statistical approaches, viz.
ENVIRONMENTAL CORRELATES OF POPULATION DIFFERENTIATION IN ATLANTIC HERRING
- D. Bekkevold, C. André, D. Ruzzante
- Environmental ScienceEvolution; 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 isolation mechanisms are associated with the specific salinity conditions on spawning locations.
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.
World-wide whale worms? A new species of Osedax from the shallow north Atlantic
- A. Glover, Björn Källström, C. Smith, T. Dahlgren
- BiologyProceedings of the Royal Society B: Biological…
- 22 December 2005
Molecular evidence from mitochondrial cytochrome oxidase 1 (CO1) and 18S rRNA sequences suggests that O. mucofloris has high dispersal rates, and provides support for the idea of whale-falls acting as ‘stepping-stones' for the global dispersal of siboglinid annelids over ecological and evolutionary time.
Detecting population structure in a high gene-flow species, Atlantic herring (Clupea harengus): direct, simultaneous evaluation of neutral vs putatively selected loci
Simulations addressing the statistical power for detecting population divergence showed that when using Cpa112 alone, compared with using eight presumed neutral microsatellite loci, sample sizes could be reduced by up to a tenth while still retaining high statistical power.
New Perspectives on the Ecology and Evolution of Siboglinid Tubeworms
The role of ecological conditions in the evolution of siboglinids is discussed and possible scenarios of the evolutionary origin of the symbiotic relationships between sibogslinids and their endosymbiotic bacteria are presented.
Temporally stable genetic structure of heavily exploited Atlantic herring (Clupea harengus) in Swedish waters
Despite little genetic differentiation, migration among localities appears small enough to permit demographic independence between populations.
Molecular Phylogeny of the Model Annelid Ophryotrocha
- T. Dahlgren, B. Åkesson, C. Schander, K. Halanych, P. Sundberg
- BiologyThe Biological Bulletin
- 1 October 2001
This study uses 16S mitochondrial gene sequence data to infer the phylogeny of Ophryotrocha strains commonly used in the laboratory and shows that sequential hermaphroditism evolved from a simultaneous hermphroditic ancestor, and that characters previously used in phylogenetic reconstruction are homoplasic within the group.
Insights into the abundance and diversity of abyssal megafauna in a polymetallic-nodule region in the eastern Clarion-Clipperton Zone
Eastern-CCZ megafaunal diversity is high relative to two abyssal datasets from other regions, however comparisons with CCZ and DISCOL datasets are problematic given the lack of standardised methods and taxonomy.