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SC/69A/ASI/12
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Resource ID
19940
Access
Open
Document Number
SC/69A/ASI/12
Full Title
Research plan for Japan’s dedicated cetacean sighting surveys in the North Pacific Ocean in summer 2023
Author
Takashi Hakamada, Megumi Takahashi, Taiki Katsumata, Tatsuya Isoda And Koji Matsuoka
Authors Summary
This paper outlines Japan’s plan for a systematic vessel-based sighting survey in the North Pacific in 2023. The main objective of this survey is to estimate the abundance of large whale species in the North Pacific Ocean for management and conservation purposes. The survey will be conducted using the research vessels Yushin-Maru (YS1) and Kaiyo-Maru No. 7 (KY7) in late July to early October 2023 and will cover the area comprised between 20°N-30°N, 140°E-180°. Distance and angle estimations, photo-ID, biopsy, and satellite tagging experiments will be also conducted.
Publisher
IWC
Publication Year
2023
Abstract
This document outlines the plan for a systematic vessel-based sighting survey in the North Pacific in the summer 2023. The main objective of this survey is to attain the sighting data required to estimate the abundance of large whale species in the North Pacific Ocean. The survey will be conducted using the research vessels Yushin-Maru (YS1) and Kaiyo-Maru No. 7 (KY7) from late July to early October 2023, and will cover the area comprised between 20°N-30°N, 140°E-180°. For more precise abundance estimation of whales, distance and angle estimation experiments will be conducted. Furthermore, photo-identification experiments on blue, North Pacific right, humpback and killer whales will be collected on an opportunistic basis. Biopsy skin samples of large whale species such as blue, fin, sei, North Pacific right, humpback and killer whales, and satellite tagging experiments on fin, sei, common minke and Bryde’s whales will be also conducted. Data and samples obtained during these experiments will be used in future studies on distribution, abundance, movement and stock structure of the species involved, required for assessment and management purposes.