2026-03-05T17:34:22Z https://fra.repo.nii.ac.jp/oai

oai:fra.repo.nii.ac.jp:02015894 2026-01-21T07:55:31Z 15

Horizontal distribution and abundance of red seabream (Pagrus major) in the East China Sea and Sea of Japan based on standardized catch per unit effort 40371976 0000-0002-2883-7588 Ohshimo, Seiji 大下, 誠二 オオシモ, セイジ Ohshimo 大下 オオシモ Seiji 誠二 セイジ 0000-0001-7785-0490 Masubuchi, Takahito 増渕, 隆仁 マスブチ, タカヒト Masubuchi 増渕 マスブチ Takahito 隆仁 タカヒト Gomi, Shintaro 五味, 伸太郎 ゴミ, シンタロウ Gomi 五味 ゴミ Shintaro 伸太郎 シンタロウ 10392903 Iseki, Tomoaki 井関, 智明 イセキ, トモアキ Iseki 井関 イセキ Tomoaki 智明 トモアキ 70463106 Sakai, Takeshi 酒井, 猛 サカイ, タケシ Sakai 酒井 サカイ Takeshi 猛 タケシ CPUE; Habitat; Red seabream; Pagrus major Red seabream (Pagrus major) is an important fisheries species in Japan, where it has been managed since 2025. Accurate stock assessment is necessary for rational fisheries management, and catch per unit effort (CPUE) is one of the key indexes used for this purpose. In the present study, the CPUE of red seabream in the East China Sea and Sea of Japan was standardized by incorporating seawater temperature and salinity based on fishing data obtained from bottom trawlers operating in key fishing grounds in these regions. We used data from operation reports available from 1982 to 2022, including fishing positions and efforts during each cruise and incorporated temperature and salinity data into the model from 1993. We applied a delta log-normal model for CPUE standardization and revealed an increase in this index since the early 1990s. We examined the horizontal distribution patterns of red seabream in each fishery grid that is 30 × 30 min latitude and longitude, and observed that the high-CPUE area extended northeastward from Taiwan to Japan along the shelf edge, which corresponds to the main fishing grounds covered by Japanese fleets after 2000. The probability of presence of red seabream increased drastically when water temperature at a depth of 50 m exceeded 15 °C. The reasons for the observed stock fluctuations may be a reduction in fishing pressure and warming seawater temperature. Elsevier 2025-12-20 eng journal article AO https://fra.repo.nii.ac.jp/records/2015894 10.1016/j.rsma.2025.104513 Elsevier Science Direct 25232002 水産資源研究所 水産資源研究センター 底魚資源部 （長崎） https://doi.org/10.1016/j.rsma.2025.104513 Elsevier Science Direct 2352-4855 2352-4855 Regional Studies in Marine Science 91 104513 https://fra.repo.nii.ac.jp/record/2015894/files/Ohshimo et al. _Horizontal distribution and abundance of red seabream.pdf application/pdf 1.2 MB 2025-12-25