Dear all, On behalf of my co-authors, I am pleased to inform you about our paper titled "Mitochondrial DNA Haplotypes of Killer Whales around Hokkaido, Japan" recently published in Mammal Study. 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), 1-7, (2 June 2021). https://doi.org/10.3106/ms2020-0072 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. The article can be found at the link, https://bioone.org/journals/mammal-study/volume-46/issue-3/ms2020-0072/Mitoc... or please email me <yo_mitani@fsc.hokudai.ac.jp> for a PDF copy. Best, Yoko -- 三谷曜子 Yoko Mitani 北海道大学北方生物圏フィールド科学センター 海獣班 HokkaidOcean Mammal Team 〒040-0051 北海道函館市弁天町20番5号 函館市国際水産・海洋総合研究センター内219号室 Tel&Fax: 0138-85-6625 Email: yo_mitani@fsc.hokudai.ac.jp Yoko MITANI HokkaidOcean Mammal Team Field Science Center for Northern Biosphere, Hokkaido University Hakodate Research Center for Fisheries and Oceans 20-5 Benten-cho, Hakodate, Hokkaido 040-0051, JAPAN TEL&FAX: +81-138-85-6625 E-mail: yo_mitani@fsc.hokudai.ac.jp