On morphological diversity of southern Dolly Varden trout Salvelinus malma krascheninnikovi from water bodies of Sakhalin

Pichugin, M. Yu.; Gritsenko, O. F.; Osinov, A. G.

doi:10.1134/s0032945208050020

“…It should be noted that mtDNA haplotypes of northern Dolly Varden are revealed in many populations of southern Dolly Varden from the Kuril Islands and Sakhalin, and, in some cases, they have high frequencies (Shedko et al 2007;Osinov and Mugue, 2008). An occurrence of introgressive hybridization between southern Dolly Varden and northern Dolly Varden from Asia is supported by morphological analysis (Pichugin et al 2008) and allozyme data (Osinov 2001). The present ranges of these forms can be partly overlapped in Primorye, Sakhalin and the northern Kuril Islands, while the populations might have been strongly reproductively isolated.…”

Section: Introgressive Hybridization and Phylogeny Of Charrs Of The G...mentioning

confidence: 74%

“…Based on the opinion of Safronov and Zvezdov (2005), three charr species (southern Dolly (S. krascheninnikovi), its resident form (S. curilus) and a new species, Sakhalin charr S. vasiljevae, described by the authors) are jointly distributed in certain rivers of northwestern Sakhalin. In our opinion, the existence of different forms in several Sakhalin rivers, most likely, can be explained by the occurrence of a zone of the secondary contact between northern Dolly Varden and southern Dolly Varden (Osinov and Mugue 2008;Pichugin et al 2008). An occurrence of the three or only two charr (Dolly Varden) forms in Sakhalin, as well as a degree of their reproductive isolation, will be specified only after the population genetic analysis.…”

Section: Introgressive Hybridization and Phylogeny Of Charrs Of The G...mentioning

confidence: 77%

Charrs of the genus Salvelinus (Salmonidae): hybridization, phylogeny and evolution

Osinov

¹

,

Volkov

²

,

Mugue

³

2021

View full text Add to dashboard Cite

Evolutionary history, systematics and taxonomy of charrs of the genus Salvelinus and especially of the representatives of the S. alpinus -S. malma species complex remain confused that is connected with a substantial ecological and morphological flexibility of this group and with supposed ancient hybridization between some taxa. For the analysis of phylogenetic relationships and introgressive hybridization between the species of the genus Salvelinus including three endemic species from Lake El'gygytgyn and all main representatives of the S. alpinus -S. malma species complex, nucleotide sequences of mtDNA control region (960 bp) and two nuclear genes (ITS1 (581 bp) and RAG1 (899 bp)) were analyzed. The differences in the topologies of individual gene trees, among others reasons, were connected with incomplete lineage sorting and historical introgressive hybridization between certain taxa. Several cases of mtDNA capture by different taxa and phylogenetic groups were proposed. In particular, the following taxa participated in introgressive hybridization: northern Dolly Varden S. m. malma, representatives of the S. alpinus complex (including mainly Taranets charr S. a. taranetzi), southern Dolly Varden S. m. lordi from North America and bull trout S. confluentus. Main phylogenetic groups of the S. alpinus -S. malma species complex were revised. The origin and phylogenetic relationships of southern Dolly Varden from North America were not unambiguously defined. We proposed that introgressive hybridization had an important role in the evolutionary history of charrs, in particular, in the appearance of a high level of morphological, ecological and taxonomical diversity.

show abstract

Charrs of the genus Salvelinus (Salmonidae): hybridization, phylogeny and evolution

Osinov

¹

,

Volkov

²

,

Mugue

³

2019

Preprint

1

0

View full text Add to dashboard Cite

Evolutionary history, systematics and taxonomy of charrs of the genus Salvelinus and especially of the representatives of the S. alpinus -S. malma species complex remain confused that is connected with a substantial ecological and morphological flexibility of this group and with supposed ancient hybridization between some taxa. For the analysis of phylogenetic relationships and introgressive hybridization between the species of the genus Salvelinus including three endemic species from Lake El'gygytgyn and all main representatives of the S. alpinus -S. malma species complex, nucleotide sequences of mtDNA control region (960 bp) and two nuclear genes (ITS1 (581 bp) and RAG1 (899 bp)) were analyzed. The differences in the topologies of individual gene trees, among others reasons, were connected with incomplete lineage sorting and historical introgressive hybridization between certain taxa. Several cases of mtDNA capture by different taxa and phylogenetic groups were proposed. In particular, the following taxa participated in introgressive hybridization: northern Dolly Varden S. m. malma, representatives of the S. alpinus complex (including mainly Taranets charr S. a. taranetzi), southern Dolly Varden S. m. lordi from North America and bull trout S. confluentus. Main phylogenetic groups of the S. alpinus -S. malma species complex were revised. The origin and phylogenetic relationships of southern Dolly Varden from North America were not unambiguously defined. We proposed that introgressive hybridization had an important role in the evolutionary history of charrs, in particular, in the appearance of a high level of morphological, ecological and taxonomical diversity.

show abstract

Gill raker and pyloric caeca counts differ between Arctic char (Salvelinus alpinus) and Dolly Varden (S. malma) populations across their ranges

Weinstein,

Gallagher,

Hale

et al. 2024

Journal of Fish Biology

0

View full text Add to dashboard Cite

Meristic characters are often used to differentiate between closely related forms, morphs, and species of fishes, and lend insight into ecology and post‐glacial recolonization in taxa with complicated or contentious phylogenies, including the genus Salvelinus. Previous studies of meristics in Salvelinus have focused mostly on individual populations. We collated data from 456 populations/systems across the North American and Russian Arctic and sub‐Arctic, and found that counts of pyloric caeca and gill rakers differed consistently between fish visually and/or genetically identified as Arctic char and Dolly Varden across their distributional ranges.

show abstract

On morphological diversity of southern Dolly Varden trout Salvelinus malma krascheninnikovi from water bodies of Sakhalin

Cited by 6 publications

References 3 publications

Charrs of the genus Salvelinus (Salmonidae): hybridization, phylogeny and evolution

Charrs of the genus Salvelinus (Salmonidae): hybridization, phylogeny and evolution

Charrs of the genus Salvelinus (Salmonidae): hybridization, phylogeny and evolution

Gill raker and pyloric caeca counts differ between Arctic char (Salvelinus alpinus) and Dolly Varden (S. malma) populations across their ranges

Contact Info

Product

Resources

About