Mitochondrial DNA Haplotypes of Killer Whales around Hokkaido, Japan

Yoko Mitani; Yuki F. Kita; Shigeo Saino; Motoi Yoshioka; Hiroshi Ohizumi; Fumio Nakahara

doi:10.3106/ms2020-0072

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2 June 2021 Mitochondrial DNA Haplotypes of Killer Whales around Hokkaido, Japan

Yoko Mitani, Yuki F. Kita, Shigeo Saino, Motoi Yoshioka, Hiroshi Ohizumi, Fumio Nakahara

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Yoko Mitani,^1,*,** Yuki F. Kita,^2,* Shigeo Saino,³ Motoi Yoshioka,⁴ Hiroshi Ohizumi,⁵ Fumio Nakahara⁶

¹Field Science Center for Northern Biosphere, Hokkaido University, 20-5 Benten-cho, Hakodate, Hokkaido 040-0051, Japan
²Department of Marine Biology and Sciences, School of Biological Sciences, Tokai University, Minami-ku, Sapporo, Hokkaido 005-8601, Japan
³Kobe Animals-and-Plants Environmental College, Higashinada-ku, Kobe, Hyogo 658-0032, Japan
⁴Graduate School of Bioresources, Mie University, Kurimamachiya-cho, Tsu, Mie 514-8507, Japan
⁵Department of Marine Biology, School of Marin Science and Technology, Tokai University, Shimizu-ku, Shizuoka 424-8610, Japan
⁶Department of Psychology, Faculty of Human Science, Tokiwa University, Miwa, Mito, Ibaraki 310-8585, Japan

^*These authors contributed equally to this work.
^**To whom correspondence should be addressed. E-mail: yo_mitani@fsc.hokudai.ac.jp

Mammal Study, 46(3):205-211 (2021). https://doi.org/10.3106/ms2020-0072

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Abstract

In this study, we examined a genetic variation of killer whales, Orcinus orca, from off the coast of Hokkaido, Japan, by sequencing the D-loop and cytochrome b (Cyt-b) regions of the mitochondrial genome. Three D-loop and two Cyt-b haplotypes were identified from eight skin biopsies. These five haplotypes had been previously deposited at GenBank and the International Nucleotide Sequence Database Collaboration (INSDC). Two D-loop and one Cyt-b haplotypes were consistent with the marine mammal-eating “Transient” ecotype previously reported in Japanese waters. One D-loop and one Cyt-b haplotypes were identified as the fish-eating “Resident” or “Offshore” ecotype that is the first record of this ecotype in Japanese waters. Our study showed that different ecotypes exist in Japanese waters, contributing to the conservation and management of killer whales.

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Yoko Mitani, Yuki F. Kita, Shigeo Saino, Motoi Yoshioka, Hiroshi Ohizumi, and Fumio Nakahara "Mitochondrial DNA Haplotypes of Killer Whales around Hokkaido, Japan," Mammal Study 46(3), 205-211, (2 June 2021). https://doi.org/10.3106/ms2020-0072

Received: 18 July 2020; Accepted: 5 December 2020; Published: 2 June 2021

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Mammal Study
Vol. 46 • No. 3
July 2021

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cytochrome b

D-loop

ecotype

Orcinus orca

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Yoko Mitani, Yuki F. Kita, Shigeo Saino, Motoi Yoshioka, Hiroshi Ohizumi, Fumio Nakahara "Mitochondrial DNA Haplotypes of Killer Whales around Hokkaido, Japan," Mammal Study, 46(3), 205-211, (2 June 2021)

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