학술논문
Molecular phylogeny and zoogeography of marine sculpins in the genus Gymnocanthus (Teleostei; Cottidae) based on mitochondrial DNA sequences.
Document Type
Article
Source
Subject
*OSTEICHTHYES
*MOLECULAR phylogeny
*ZOOGEOGRAPHY
*COTTIDAE
*PLEISTOCENE Epoch
*ARCHIPELAGOES
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Language
ISSN
0025-3162
Abstract
Gymnocanthus is the most widely distributed genus in the family Cottidae, with six species distributed in the high-latitude area of northern hemisphere. To clarify the phylogenetic relationships and to estimate the divergence times of species in the genus, 2,548 bp of the partial sequences of the 12-16S rRNA, cytochrome oxidase subunit I and cytochrome b gene were analyzed. Our results suggest the monophyletic genus, which arose in the Aleutian Archipelago, divided into a shallow-water group and a deep-water group 8.1 million years ago (Ma). G. tricuspis of the shallow-water group firstly migrated from the Pacific to the Arctic Ocean 5.0 Ma when the Bering Strait first opened. A second migration occurred in the late Pliocene to early Pleistocene after which G. pistilliger and G. intermedius diverged 3.9 Ma. Our findings are discussed within an evolutionary and zoogeographic context. [ABSTRACT FROM AUTHOR]