Molecular evolution of the cottoid fish endemic to Lake Baikal deduced from nuclear DNA evidence

Molecular Phylogenetics and Evolution
David M HuntK S Dulai

Abstract

Lake Baikal in Eastern Siberia contains a remarkable flock of 29 species of teleost fishes of the suborder Cottoidei (sculpins, bullheads) that are endemic to the lake and its associated rivers and occupy all depth habitats down to over 1500 m. The species are divided into three families, the Cottidae with 7 species, the Abyssocottidae with 20 species, and the Comephoridae with 2 species. Nucleotide sequences of the rod opsin gene from 12 of these species, plus a non-Baikal marine species, have been used to examine the evolutionary relations and the divergence time of the flock. Phylogenetic trees, generated by neighbor-joining and maximum parsimony, indicate that the unique Comephoridae family with its viviparity and unusual appearance is closely related to the Cottidae and Abyssocottidae, whereas the genus Cottocomephorus, at present placed in the Cottidae, was the first to diverge from the ancestral species and forms a separate lineage. The major adaptation to deep water would appear to be of relatively recent origin, and there is evidence that the ancestral species occupied a shallow-water-marine or brackish habitat. Estimates of antiquity obtained from synonymous substitutions place the origin of the species flock at aroun...Continue Reading

References

Oct 27, 1995·Gene·J FitzgibbonD M Hunt
Mar 1, 1994·Vision Research·J K BowmakerO G Smirnova
Jan 12, 1993·Biochemistry·R L JohnsonK Nakanishi

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Citations

Jun 16, 2012·PloS One·Hideyuki DoiHelmut Hillebrand
Jul 7, 2011·Evolution; International Journal of Organic Evolution·Alex DornburgMichael E Alfaro
Dec 20, 2011·Molecular Phylogenetics and Evolution·Diana J RennisonJohn S Taylor
Dec 1, 1999·Evolution; International Journal of Organic Evolution·Julie TurgeonLouis Bernatchez
Oct 13, 2000·Progress in Retinal and Eye Research·P K Ahnelt, H Kolb
May 12, 2021·BMC Ecology and Evolution·Polina DrozdovaMaxim Timofeyev
Sep 26, 2021·Molecular Biology and Evolution·Nik LupšeZuzana Musilova

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