Effect of isolation on the genetic characteristics of populations in charrs of the genus Salvelinus

Олейник, А. Г.; Скурихина, Л. А.; Chukova, E. I.

doi:10.1134/s1022795407090062

Cited by 5 publications

(6 citation statements)

References 15 publications

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“…Such drift was observed both at microsatellite loci in our work and in mtDNA (Oleinik et al, 2007). Our results implied the existence of genetically distinct resident S. m. krascheninnikovi populations on a microgeographic scale (1-4 km), which demonstrates very low migration activity of chars even if physical barriers are absent.…”

Section: Discussionsupporting

confidence: 43%

“…Interestingly, an opposite trend was observed in allozyme heterozygosity, haplotype diversity and nucleotide variability of mtDNA (Osinov & Pavlov, 1998;Oleinik et al, 2005) and karyotype diversity (Cavender & Kimura, 1989). Differences between subspecies in interpopulation differentiation estimates were also found in allozyme analyses (G ST estimates, Osinov & Pavlov, 1998; and mtDNA analysis, with contrasts especially significant for the latter (mean F ST estimates are 0.165 for S. m. malma vs. 0.453 for S. m. krascheninnikovi; Oleinik et al, 2007). High levels of S. m. krascheninnikovi diversity was attributed to favorable environmental conditions and, respectively, high abundance , or to its earlier origin (Osinov & Pavlov, 1998;Oleinik et al, 2002) and longer existence in nonglaciated regions (Gritsenko, 1975).…”

Section: Discussionmentioning

confidence: 84%

“…A more clear regional component is typical for mtDNA (Oleinik et al, 2007), whereas for microsatellites, differentiation within subspecies appears to be no greater than between subspecies. This is most likely a consequence of homogenizing effect of homoplasia at microsatellite loci noted above.…”

Section: Discussionmentioning

confidence: 88%

“…It is known that genetic differences between related populations may develop rapidly in isolation, during dozens of generations. Such differentiation was demonstrated in artificial isolated or transplanted population of Dolly Varden and other salmonid fishes (Yamamoto et al, 2004;Gordeeva et al, 2006;Oleinik et al, 2007). A rapid increase of genetic divergence is often typical for populations that passed through a bottleneck (i.e., catastrophic decrease in numbers) at the initial stage of their formation or during their history (Chacraborty & Nei, 1977;Hedrick, 1999).…”

Section: Discussionmentioning

confidence: 98%

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Microsatellite genetic variation of Asian populations of Dolly Varden char

2010

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Genetic variation at eight microsatellite loci was examined in 21 populations of Dolly Varden charrs, Salvelinus malma, representing five geographical regions (Kamchatka Peninsula, Sea of Okhotsk coast, Sea of Japan coast, Sakhalin Island, and Kuril islands). Hierarchical analysis of molecular variance showed that 11% (58% in terms of R-statistics) of the variation was distributed among of northern subspecies of Dolly Varden, Salvelinus malma malma and southern Asian Dolly Varden, S. m. krascheninnikovi while similar values were attributed to the amongregional level within northern Dolly Varden 9% (7%) and southern Asian Dolly Varden 11% (14%). Permutation-based tests indicated a mutational component to genetic differentiation based on allelic size variance and suggested that divergence of the two subspecies had occurred at least 3,000 generations ago. On large spatial scales (within the Asian range of the species), populations clustered according to their geographical location. On smaller scales (within regions and subregions) correlation between genetic and geographic distances was not significant. Northern Dolly Varden has higher allelic diversity and more private alleles than southern subspecies, this probably indicating differences in demographic history.

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Section: Discussionsupporting

confidence: 43%

Section: Discussionmentioning

confidence: 84%

Section: Discussionmentioning

confidence: 88%

Section: Discussionmentioning

confidence: 98%

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Microsatellite genetic variation of Asian populations of Dolly Varden char

2010

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“…Recent observations have discovered that normally fluvial charr Salvelinus malma (Walbaum, 1792) occupies tiny dammed waterbodies (<1 km 2 ) throughout the Kamchatkan volcanic range (Busarova, Esin, Butorina, Esipov, & Markevich, ; Esin, Myuge, Koval’, & Sorokin, ; Oleinik, Skurikhina, & Chukova, ). Since these lakes originated throughout the Holocene, they can conserve S. malma populations with the morphological features corresponding to the sequential steps of specialisation.…”

Section: Introductionmentioning

confidence: 99%

Parallel late ontogeny transformations in contrasting landlocked phenotypes ofSalvelinus malma(Salmonidae) from small volcanic lakes

Есин

Маркевич

2019

Ecology of Freshwater Fish

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A rapid phenotype deviation is a common population response to atypical environmental conditions in aquatic animals. However, the implications for adaptive specialisation, stochastic segregation and ancestral traits fixation in the stress‐induced phenotype transformation are not clear. Here, we cross‐analyse the populations of commonly fluvial Dolly Varden charr Salvelinus malma multiply locked in small lakes (<1 km2) throughout Kamchatkan volcanic range to assess the ratio of (non)parallel outcomes of phenotype specialisation under stress conditions. The growth rate and definitive size parameters show a twofold difference in six populations inhabiting the same resource‐poor lakes. An inter‐population comparison revealed a weakly pronounced morphological similarity—no directional vector towards lacustrine lifestyle is detected in body and skull shape. Local morphotypes experiencing random segregation and ancestral fixation processes inherit the unique morphometric, meristic and cranial characteristics. The most ancient populations are characterised by the most paedomorphic exterior and archaic anatomical peculiarities. Parallelism in population structure manifests itself in growth acceleration of some mature or maturing individuals resulting in two distinct size groups with different allometric body proportions. Small fish (50–260 g, average age 6–7 years) feed on invertebrates throughout their life, while the biggest ones (290–780 g, average age 8 years) switch to cannibalism. This transformation does not lead to any inherited sympatric polymorphism. Thus, we did not reveal any common vector of the stress‐induced specialisation; adaptive phenotypes are strongly influenced by the resource dynamics.

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