Vol. 61, 2022
Population Genetic Structures
and Demographic Expansion of Exotic Jellyfish Carybdea brevipedalia in Korean
Coasts Inferred from Mitochondrial COI
and Jang-Seu Ki1,*
of Biotechnology, Sangmyung University, Seoul 03016, South Korea.
*Correspondence: E-mail: firstname.lastname@example.org (Ki). Phone: +82-2-2287-5449,
E-mail: email@example.com (Muhammad); firstname.lastname@example.org (Seo)
2Marine Environmental Research and Information
Laboratory, Gunpo 15850, South Korea. E-mail: email@example.com (Chae)
Received 28 January 2022 / Accepted 30
Communicated by James D. Reimer
Kishinouye, 1891 is a poisonous jellyfish that usually occurs only in
Japanese coastal regions. However, it was recently found on the Korean
coast, thus expanding its known geographical range. In this study, we
analyzed the population genetics and demographic histories of 113 C. brevipedalia specimens from the southern and eastern coastal regions of Korea by sequencing mitochondrial DNA cytochrome c oxidase subunit I (COI). We identified 42 C. brevipedalia COI
haplotypes with high genetic diversity and a significant genetic
structure. Populations were highly differentiated based on geographic
location and distinctly divided into A and B clades. The results of
Mantel tests indicated that geographic distance influenced the genetic
distance between the two clades. Moreover, demographic analyses
(neutrality tests) and the star-like profile of the Templeton,
Crandall, and Sing (TCS) haplotype network indicated that C. brevipedalia had recently expanded into the southern and eastern coastal regions of Korea. These findings suggest that C. brevipedalia populations
along the Korean coast have significant genetic differentiation that
could be influenced by geographic isolation and subsequentadaptation to regional ecological conditions.
Key words: Carybdea brevipedalia, Cytochrome c oxidase subunit I (COI), Exotic species, Genetic
differentiation, Population expansion.
Citation: Muhammad BL, Seo Y, Chae J, Ki
JS. 2022. Population genetic structure and demographic expansion of the
exotic jellyfish Carybdea
brevipedalia (Cubozoa, Cnidaria) into the Korean coast. Zool Stud 61:48. doi:10.6620/ZS.2022.61-48.
Supplementary materials: Table S1丨Table S2丨Table S3