Historical introgression and the role of selective vs. neutral processes in structuring nuclear genetic variation (AFLP) in a circumpolar marine fish, the capelin (<i>Mallotus villosus</i>)

Colbeck, Gabriel J.; Turgeon, Jean; Sirois, Pascal; Dodson, Julian J.

doi:10.1111/j.1365-294x.2011.05069.x

Cited by 27 publications

(37 citation statements)

References 48 publications

(93 reference statements)

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“…from bivalve molluscs in the Macoma balthica and Mytilus edulis complexes (Väinölä 2003;Riginos and Cunningham 2005;Strelkov et al 2007). Interbreeding following secondary contact has also been suggested for trans-Arctic capelin lineages (Mallotus villosus; Colbeck et al 2011). As with the herring, the outcomes from different secondary contact events within these taxa are not always the same, and the levels of hybridization may vary among geographical regions.…”

Section: Comparative Frameworkmentioning

confidence: 96%

Introgressive hybridization between the Atlantic and Pacific herrings (Clupea harengus and C. pallasii) in the north of Europe

et al. 2014

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Section: Comparative Frameworkmentioning

confidence: 96%

Introgressive hybridization between the Atlantic and Pacific herrings (Clupea harengus and C. pallasii) in the north of Europe

et al. 2014

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“…Genome‐wide coverage may produce loci that are under selection, but the majority of AFLP loci are expected to be neutral (e.g. Colbeck et al. 2011).…”

Section: Methodsmentioning

confidence: 99%

Decoupling of genetic and phenotypic divergence in a headwater landscape

et al. 2012

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In stream organisms, the landscape affecting intraspecific genetic and phenotypic divergence is comprised of two fundamental components: the stream network and terrestrial matrix. These components are known to differentially influence genetic structure in stream species, but to our knowledge, no study has compared their effects on genetic and phenotypic divergence. We examined how the stream network and terrestrial matrix affect genetic and phenotypic divergence in two stream salamanders, Gyrinophilus porphyriticus and Eurycea bislineata, in the Hubbard Brook Watershed, New Hampshire, USA. On the basis of previous findings and differences in adult terrestriality, we predicted that genetic divergence and phenotypic divergence in body morphology would be correlated in both species, but structured primarily by distance along the stream network in G. porphyriticus, and by overland distance in E. bislineata. Surprisingly, spatial patterns of genetic and phenotypic divergence were not strongly correlated. Genetic divergence, based on amplified DNA fragment length polymorphisms, increased with absolute geographic distance between sites. Phenotypic divergence was unrelated to absolute geographic distance, but related to relative stream vs. overland distances. In G. porphyriticus, phenotypic divergence was low when sites were close by stream distance alone and high when sites were close by overland distance alone. The opposite was true for E. bislineata. These results show that small differences in life history can produce large differences in patterns of intraspecific divergence, and the limitations of landscape genetic data for inferring phenotypic divergence. Our results also underscore the importance of explicitly comparing how terrestrial and aquatic conditions affect spatial patterns of divergence in species with biphasic life cycles.

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“…Capelin spend most of their life feeding in offshore waters; at maturation, they undergo extensive inshore migrations to spawning grounds at either beach or demersal (at depths of up to 90 m) sites (Carscadden and Nakashima 1997). Previous genetic studies concluded that capelin in the north Atlantic are subdivided into two distinct clades: the northwest Atlantic (Newfoundland, St. Lawrence Estuary, and Hudson's Bay) and the northeast Atlantic (Iceland and Barents Sea) (e.g., Dodson et al 2007;Praebel et al 2008;Colbeck et al 2011). These geographically delineated clades show differences in vertebral number, fecundity, egg size, and spawning mode (Stergiou 1989).…”

Section: Introductionmentioning

confidence: 97%

“…In contrast to cod and herring (for which there are at least 20-50 published genetic studies on a variety of spatial scales; Reiss et al 2009), fewer than 10 population genetic studies have been conducted on capelin in the north Atlantic. The majority of these investigations have been on scales spanning their north Atlantic distribution (e.g., Praebel et al 2008;Colbeck et al 2011) or using mitochondrial DNA (mtDNA) markers (e.g., Dodson et al 1991Dodson et al , 2007, restricting their potential to examine finer scale reproductive units, such as between habitat types in close geographic proximity. Whereas mtDNA tends to show historic patterns of reproductive isolation and colonization, microsatellites have a relatively fast mutation rate that makes them effective for detecting recent, fine-scale divergence (Selkoe and Toonen 2006).…”

Section: Introductionmentioning

confidence: 99%

Lack of genetic divergence in capelin (Mallotusvillosus) spawning at beach versus subtidal habitats in coastal embayments of Newfoundland

et al. 2014

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Capelin (Mallotus villosus (Müller, 1776)), a focal forage fish in the north Atlantic, spawn on both beach and demersal (deep-water) sites throughout their circumpolar distribution. Although these habitats rarely occur in close proximity, demersal spawning sites within 4 km of beach spawning sites (subtidal) have recently been discovered in two coastal embayments in Newfoundland, Canada. The physical environment differs considerably between beach and subtidal spawning sites, creating the potential for local adaptation and genetic divergence of capelin from the two habitats, but this has never been investigated on a fine spatial scale. We use eight microsatellite loci to test for genetic divergence between capelin spawning at beach and subtidal sites within these two coastal regions in Newfoundland. We found no genetic differentiation between fish spawning at beach and subtidal sites or between the two regions. The results from this fine-scale study are in agreement with the lack of habitat-based structure reported in other studies examining beach and demersal sites separated by a larger geographic area. We suggest that instead of showing site fidelity and local adaptation, the facultative use of alternate spawning habitats may be a more successful strategy in an unpredictable environment.

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Historical introgression and the role of selective vs. neutral processes in structuring nuclear genetic variation (AFLP) in a circumpolar marine fish, the capelin (Mallotus villosus)

Cited by 27 publications

References 48 publications

Introgressive hybridization between the Atlantic and Pacific herrings (Clupea harengus and C. pallasii) in the north of Europe

Introgressive hybridization between the Atlantic and Pacific herrings (Clupea harengus and C. pallasii) in the north of Europe

Decoupling of genetic and phenotypic divergence in a headwater landscape

Lack of genetic divergence in capelin (Mallotusvillosus) spawning at beach versus subtidal habitats in coastal embayments of Newfoundland

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