Application of DNA Methylation-Based Age Estimation to Construct an Age Structure of Humpback Whales in a Newly Emerged Wintering Ground Around Hachijojima Island, Tokyo Metropolis, Japan.

If they are using this area as their breeding ground, this finding would be quite significant because it indicates that the breeding area of the western North Pacific population has been expanding northward beyond the traditionally known Okinawa Islands, Amami Oshima Island, and the Ogasawara Archipelago surrounding Japan (approximately 1400, 1100, and 700 km apart in straight lines, respectively, Kobayashi et al. 2022 ).

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