著者

手良村 知功 小枝 圭太 鈴木 尚光 平瀬 祥太朗 瀬能 宏

出版者

一般社団法人 日本魚類学会

雑誌

魚類学雑誌 (ISSN:00215090)

巻号頁・発行日

pp.19-032, (Released:2020-02-28)

参考文献数

18

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A single specimen (124 mm in standard length) of the genus Bathophilus, trawled from 300 m in Suruga Bay, Japan on 30 January 2019, was identified as Bathophilus longipinnis (Pappenheim, 1914), being characterized by the following combination of characters: bases of pelvic fins equidistant between dorsal and ventral profiles; pectoral-fin rays 8; pelvic-fin rays 10; ventral row of photophores from tip of isthmus to anal-fin origin 32; large lateral series photophores 25; vertebrae 45 (previously recorded range 40–44); head length 17.3% in standard length (18.0–25.0%); body depth at origin of dorsal fin base 14.3% in standard length. The circumglobal (Atlantic Ocean; Indian Ocean; southern Pacific Ocean: Australia; Central Pacific: Hawaiian Islands; western Pacific Ocean: South China Sea) species has been previously recorded from the Kuroshio Current basin (20– 38˚S, 138–152˚E), although the detailed collection locality was not stated. There being no other records from Japanese waters, the specimen from Suruga Bay represents the first unequivocal record of B. longipinnis from Japan. The new standard Japanese name “Amanogawa-gingaeso” is proposed for the species.

著者

畑 晴陵 小枝 圭太

出版者

日本動物分類学会

雑誌

タクサ:日本動物分類学会誌 (ISSN:13422367)

巻号頁・発行日

vol.53, pp.53-58, 2022-08-31 (Released:2022-08-31)

参考文献数

36

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A single adult specimen (192.2 mm standard length) of the Malabar Trevally, Platycaranx malabaricus (Bloch and Schneider, 1801) (Teleostei: Carangidae), collected from Sagami Bay was observed in the fish collection of the Department of Zoology, The University Museum, The University of Tokyo. Because the northern limit of the distributional range of the species has been regarded as Mihama Town, Aichi Prefecture, the specimen described in this study represents the northernmost record and first record from Kanagawa Prefecture of P. malabaricus.

著者

小枝 圭太

出版者

一般社団法人 日本魚類学会

雑誌

魚類学雑誌 (ISSN:00215090)

巻号頁・発行日

pp.21-032, (Released:2022-01-28)

参考文献数

51

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A single adult specimen (205.1 mm standard length) of Lined Butterflyfish, Chaetodon lineolatus Cuvier, 1831, collected in 1932 from Onahama, Fukushima Prefecture, northern Japan, was discovered in the fish collection of the Department of Zoology, the University Museum, the University of Tokyo. The previous northernmost Japanese record of the species being the Boso Peninsula, Chiba Prefecture, most records from southern Japan have been of juveniles. Accordingly, the present specimen represents the first record of the species from the cold-water area off northern Japan (northernmost record of the species), and indicates that at least limited dispersal of tropical fishes to northern Japan occurred in the 1930’s, when water temperatures were estimated to have been almost 2˚C lower than in recent years.

著者

小枝 圭太 栗岩 薫 千葉 悟

出版者

首都大学東京小笠原研究委員会

雑誌

小笠原研究 (ISSN:03868176)

巻号頁・発行日

no.42, pp.1-8, 2015

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小笠原諸島兄島周辺海域において、ヒレナガハギ属魚類の2個体が採集された。これらの標本は、体側後半部に繊毛域があること、背鰭が5棘24軟条であること、体側後半部の体色が暗色とならないこと、光彩が黄色いことなどキイロハギZebrasoma flavescens (Bennett 1828)の識別的特徴を多くもっていた。しかし、両標本は、体色が一様に黄色であるというキイロハギにおける通常の特徴と著しく異なり、左右の体側および鰭に広い白色域が、背鰭起部付近に黒色域が、それぞれみられた。ただし、2個体の白色域のパターンが同一でないこと、2個体とも左側と右側の体色パターンに変異がみられること、およびその他の識別的特徴が先行研究で示された本種の特徴と一致したことから、両標本はキイロハギの色彩変異個体であると判断した。

著者

小枝 圭太 藤井 琢磨 吉野 哲夫

出版者

一般社団法人 日本魚類学会

雑誌

魚類学雑誌 (ISSN:00215090)

巻号頁・発行日

vol.61, no.1, pp.27-31, 2014-04-25 (Released:2016-05-22)

参考文献数

17

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A single specimen of Photoblepharon palpebratum (Boddaert, 1781), formerly limited to the tropical western Pacific, was collected from Okinawa Island, Japan at a depth of 1 m. The specimen was characterized by the following combination of characters: single dorsal fin with 3 spines; a black shutter lifting to cover the subocular organ; a large white spot on the dorsal corner of the opercle; pelvic-fin rays I, 6. The tiny first dorsalfin spine was identified from a radiograph. The specimen represents the first record of P. palpebratum from Japan and is the northernmost record of the species. The specimen produced a total of 273 eggs, but those were probably postmaturity.

著者

小枝 圭太 興 克樹 米沢 俊彦 久米 元

出版者

鹿児島大学

雑誌

鹿児島大学水産学部紀要 = Memoirs of Faculty of Fisheries Kagoshima University (ISSN:0453087X)

巻号頁・発行日

vol.65, pp.21-26, 2016

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The fresh water species Green Swordtail Xiphophorus heller Heckel, 1848, endemic to central and northern America, was introduced to Japanese waters in the 1960's, established populations being recorded on Kume-jima island and Okinawa-jima island (Okinawa Prefecture), and in Yamanashi Prefecture. A single specimen (39.9 mm SL) of Green Swordtail, collected from the Handa River in May 2011, was the first record of the species from Amami-oshima island (one of the Satsunan Islands). Although the population increased hugely over the following years, it decreased significantly in winter 2015/2016, during which record low temperature levels occurred, only to recover within six months. The morphology of specimens from Amami-oshima island are described in detail, and distributional records of the species and recent population status on Amami-oshima island are discussed.