著者

饗場 空璃 遠藤 広光

出版者

国立大学法人 鹿児島大学総合研究博物館

雑誌

Ichthy, Natural History of Fishes of Japan (ISSN:24357715)

巻号頁・発行日

vol.40, pp.17-21, 2024-01-02 (Released:2024-01-03)

著者

松永 翼 遠藤 広光

出版者

国立大学法人 鹿児島大学総合研究博物館

雑誌

Ichthy, Natural History of Fishes of Japan (ISSN:24357715)

巻号頁・発行日

vol.34, pp.9-14, 2023-07-07 (Released:2023-07-08)

著者

水町 海斗 中山 透 手良村 知功 遠藤 広光

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.21-027, (Released:2022-02-08)

参考文献数

34

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The parazenid genus Cyttopsis Gill, 1862 includes two valid species, C. rosea (Lowe, 1843), known from the Atlantic and Indo-west Pacific Oceans, and C. cypho (Fowler, 1934) restricted to the eastern Indian and western Pacific Oceans. Around Japan, the former species is common, whereas the latter has not been recorded to date. However, two Cyttopsis specimens [51.6 and 71.8 mm standard length (SL)] collected from Tosa Bay and Enshu-nada, Japan in 2008 and 2019, respectively, have been identified as C. cypho. In addition to previous means of distinguishing between the two species, a faint dark lateral spot posteriorly on the body (absent in C. rosea) and fewer lateral-line scales (55–64) in C. cypho (vs 73–82), the following additional diagnostic characters were found: interspace between spines on 4th and 5th abdominal scutes very narrow (C. cypho) vs. wide (C. rosea); orbit diameter 13.6–16.6% vs. 14.7–19.1% of SL; interorbital width 5.8–6.6% vs. 5.8–8.0% of SL; snout length 21.1–27.4% vs. 17.8–23.3% of SL; and mandible length 22.6–25.6% vs. 22.1–26.9% of SL. The two specimens, representing the first Japanese records of C. cypho (for which the new standard Japanese name “Ittenkagomatodai” is proposed), extend the northern range of the species from off northern Mindanao Island, Philippines (type locality).

著者

熊木 慧弥 幸 大二郎 遠藤 広光

出版者

国立大学法人 鹿児島大学総合研究博物館

雑誌

Ichthy, Natural History of Fishes of Japan (ISSN:24357715)

巻号頁・発行日

vol.24, pp.9-14, 2022-09-07 (Released:2022-09-08)

著者

三澤 遼 木村 克也 水町 海斗 服部 努 成松 庸二 鈴木 勇人 森川 英祐 時岡 駿 永尾 次郎 柴田 泰宙 遠藤 広光 田城 文人 甲斐 嘉晃

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.20-023, (Released:2020-10-02)

参考文献数

192

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New distributional records of forty-five fish species off the Pacific coast of Tohoku District, northern Japan are reported, based on specimens trawled by the R/V Wakataka-maru (Japan Fisheries Research and Education Agency) during surveys in autumn of each year from 1995 to 2019. The records include northern distribution range extensions of 19 species, distribution gaps filled for 17 species, and northern and southern limits along the Pacific coast of Japan for eight and one species, respectively. Twenty-seven species were recorded off Tohoku District for the first time. In addition, taxonomic notes for each species, including some meristic and morphometric data from the collected specimens, are also provided.

著者

小泉 雄大 遠藤 広光 今村 央

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.20-029, (Released:2021-03-15)

参考文献数

17

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The stomiid snaggletooth genus Astronesthes Richardson, 1844 comprises nine species groups (including 40 valid species), plus a further eight species independent of the groups. Among them, the Astronesthes cyanea species group (seven species) is distinguished from all other species by having the following characters: e.g., 42‒50 total vertebrae, 16‒21 dorsal-fin rays, a relatively long chin barbel (but rudimentary in three species), 3 or 4 photophores (part of the ventral row below the pectoral fin) forming an arch, and prominent luminous tissue on the operculum in large specimens. Two specimens (84.6 and 111.1 mm in standard length) belonging to this species group, collected off the Yaeyama and Ogasawara Islands, Japan, were identified as Astronesthes formosana Liao, Chen and Shao, 2006. Although the original description of A. formosana, which noted its close resemblance to Astronesthes indopacifica Parin and Borodulina, 1997, considered the former to differ from the latter in having prominent luminous patch on the lower jaw (vs. absent), a slightly swollen or rounded tip on the chin barbel (vs. slender and simple), prominent luminous tissue on the lower part of the operculum, extending to the lower end of the maxilla [vs. restricted to the middle part of the operculum (in >50 mm standard length specimens)], numerous scalelike spots or prominent patches dorsally on the head and body (vs. sparse), and the upper nostril with more a pair prominent or smearlike luminous patches (vs. a single pair prominent luminous patches), no significant differences were found between the two species in prominent luminous tissue on the operculum, and scalelike spots or prominent patches dorsally on the head (including upper nostril) and body. In addition, the barbel tip shape was found to be of inconclusive value for separating the two species, leaving the presence or absence of prominent luminous patch on the lower jaw as the only valid distinguishing characteristic. Because the features of the two Japanese specimens agreed closely with those in the original description of A. formosana, they were identified as that species, being the first record of the latter from Japanese waters. The new standard Japanese name “Taiwan-tokagegisu” is proposed for the species.

著者

津野 義大 岡本 誠 氏原 温 遠藤 広光

出版者

国立大学法人 鹿児島大学総合研究博物館

雑誌

Ichthy, Natural History of Fishes of Japan (ISSN:24357715)

巻号頁・発行日

vol.20, pp.33-38, 2022-05-18 (Released:2022-05-19)

著者

永江 栞奈 高橋 弘明 遠藤 広光

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.21-007, (Released:2021-07-30)

参考文献数

23

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Mating behavior and early development of Cobitis sp. (BIWAE type D, TosaShima-dojo) were observed in the laboratory by inducing spawning of females with human chorionic gonadotropin (HCG). Subsequently, laboratory bred individuals were compared with spawned eggs and larvae obtained from the field. Mature adults, naturally spawned eggs, and larvae were collected from a river in eastern Kochi Prefecture, Shikoku Island, Japan, and a natural spawning ground adjacent to the river. Mating behavior was observed 15 times at night, and distinguished into four stages: phase 1, tracking; phase 2, approaching; phase 3, amplexus; and phase 4, spawning. Egg diameters after water absorption were 2.1–2.3 mm, the spherical, demersal eggs having a light-yellow yolk, no oil droplets, and slight viscosity. Newly hatched larvae [3.3–4.9 mm in total length (TL)] had 46 (32 + 14) myomeres, two pairs of outer gill filaments on the cheek, and melanophores on the head. Notochord flexion started at 6.0–7.2 mm TL (wild individuals at 6.0–6.3 mm TL) and was completed at 8.8 mm TL (6.6 mm TL). The formation of membranous fins and full fin-ray complements were attained in the fin order pectoral, caudal, dorsal, anal, and pelvic, and caudal, dorsal, anal, pectoral, and pelvic, respectively. Some individuals (7.0–8.0 mm TL at the flexion stage) had free neuromasts, each with a short cupula, laterally on the caudal region. In addition, following the postflexion stage, some morphological differences between artificially bred and wild individuals were observed but could not be quantified due to the small sample size.

著者

村﨑 謙太 甲斐 嘉晃 遠藤 広光 福井 篤

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.20-044, (Released:2021-05-10)

参考文献数

23

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Snailfishes (Cottoidei: Liparidae) are a large, morphologically diverse group of marine fishes, comprising about 32 genera with over 430 species worldwide. Among them, Osteodiscus Stein, 1978 is primarily distinguished from other genera in having a unique skeletal pelvic disk covered only by thin skin. Three species of the genus are currently known: Osteodiscus cascadiae Stein, 1978 from the eastern North Pacific; Osteodiscus andriashevi Pitruk and Fedorov, 1990 from southern Sea of Okhotsk; and Osteodiscus rhepostomias Stein, 2012 from southeast of New Zealand. During a taxonomic study of snailfishes, a single female specimen of Osteodiscus (150.3 mm in standard length) collected off Iwate in a depth of 1,997–2,108 m, was discovered in the fish collection of the National Museum of Nature and Science, Japan (NSMT). The specimen, characterized by 60 vertebrae (total), 54 dorsal- and 49 anal-fin rays, a horizontal mouth, simple blunt teeth on both jaws, some teeth with lateral cusps on the tip, an unnotched pectoral fin, and the presence of epipleural ribs and a reduced epural, was identified as O. andriashevi, previously known only from the holotype and three paratypes. The present specimen represents the first record of Osteodiscus from Japanese waters and the southernmost record of O. andriashevi. The new standard Japanese names “Hariban-kusauo-zoku” and “Choja-hariban-kusauo” are proposed for the genus and species, respectively. Based on the present specimen, the species diagnosis was partly revised.

著者

内藤 大河 山川 武 遠藤 広光

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.64, no.2, pp.139-143, 2017-11-25 (Released:2018-06-19)

参考文献数

12

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A single specimen [226 mm in standard length (SL)] of a haemulid fish collected from Iriomote-jima Island, Okinawa Prefecture, Japan, in 2012, was identified as Diagramma melanacrum Johnson and Randall, 2001, characterized by the following combination of characters: third dorsal-fin spine longest; first dorsal-fin spine length 45 % of second dorsal-fin spine length; pelvic-fin length 23.9 % SL; 57 lateral-line scales; and dorsal 3/4 of caudal fin yellow with many dark spots, and pelvic, anal and remainder of caudal fin black when fresh. The species has been recorded previously from the Philippines, Malaysia, Indonesia (Kalimantan and Bali to West Papua), the Timor Sea and Japan (Miyako-jima and Ishigaki-jima Islands, Okinawa). However, because both Japanese records were based on photographs, the Iriomote-jima Island specimen represents the first reliable, specimen-based record of D. melanacrum from Japan, an extension of its known northernmost range. The new standard Japanese name “Hireguro-korodai” is proposed for the species.

著者

矢頭 卓児 中山 直英 遠藤 広光

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.19-040, (Released:2020-03-24)

参考文献数

14

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The original description of Pterygotrigla cajorarori Richards and Yato, 2012, based on eight specimens from the western Pacific Ocean, including one Japanese specimen, indicated hyperostosis in the rostral projection, head bones (infraorbital, frontal, and parietal), post temporal spine, humeral spine, and the 2nd–4th first dorsal-fin spines, although variations in these characters were poorly documented. Thirteen specimens (including two paratypes) of P. cajorarori collected from southern Japan, the South China Sea, and Indonesia were found to vary individually in the degree of hyperostosis in the rostral projection, mesethmoid, lateral ethmoid, frontal, sphenotic, pterotic, and infraorbital bones, whereas the condition was not prominent in the parietal and posttemporal bones, or the humeral spines. However, hyperostosis was newly found in the 5th and 6th dorsal-fin spines and pelvic-fin spine. A detailed description of fresh coloration (previously unknown) in P. cajorarori is also given.

著者

遠藤 広光 山川 武 平田 智法

出版者

Usa Marine Biological Institute, Kochi University

雑誌

Bulletin of marine sciences and fisheries, Kochi University

巻号頁・発行日

no.21, pp.41-45, 2001-12

著者

松沼 瑞樹 上阪 健太 山川 武 遠藤 広光

出版者

国立大学法人 鹿児島大学総合研究博物館

雑誌

Ichthy, Natural History of Fishes of Japan (ISSN:24357715)

巻号頁・発行日

vol.14, pp.35-38, 2021 (Released:2021-11-24)

著者

井出 幸子 町田 吉彦 遠藤 広光

出版者

高知大学海洋生物教育研究センター

雑誌

Bulletin of marine sciences and fisheries, Kochi University (ISSN:03879763)

巻号頁・発行日

vol.22, pp.1-35, 2003-12-29

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A total of 187 bottom fish species belonging to 82 families from 19 orders were recorded from May 2001 to November 2002 at Susaki Fish Market facing Tosa Bay, southern Japan. Among them, two anguilliform fishes Evenchelys macrurus (Bleeker) and Myrophis microchir (Bleeker) are recorded here for the first time from Tosa Bay. Comparison between the present and previous records revealed that 41 species were newly recorded from off Susaki, though 51 previously recorded species from 1949 to 1960 were not confirmed in the present study. Change in the bottom fish faunae between the present and previous status off Susaki, and the differences of the present status off Susaki and other three localities along the coasts of Tosa Bay were discussed on the basis of coefficient of community.

著者

髙見 宗広 遠藤 広光 福井 篤

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.21-010, (Released:2021-05-10)

参考文献数

13

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The alepocephalid genus Conocara Goode and Bean, 1896 is characterized by the dorsal-fin origin located posterior to the anal-fin origin, dorsal-fin base shorter than the anal-fin base, body covered with small scales (> 80 in longitudinal row above the lateral line), tubular lateral line scales, the maxilla toothless, upper jaw equal to or longer than the snout, and photophores absent. Six specimens of Conocara werneri Nybelin, 1947, collected from Hyuga-nada Sea, Japan in a depth of 1,453–1,481 m, on 3 April 1991, are distinguished from all congeners by the following combination of characters: 17–20 dorsal-fin rays, 30–34 anal-fin rays, 159–179 longitudinal series scales above the lateral line, 19–22 scales between the dorsal fin insertion and lateral line, 25–32 scales between the anal fin insertion and lateral line, premaxillary bony crests present, the upper jaw reaching a vertical through the orbit anterior margin, an uninterrupted inner row of gill rakers on the first gill arch, the absence of palatine teeth, and raised insertions of the dorsal and anal fins with well-developed anterior cariniform skin folds. The gut contents of the six specimens represented the following higher taxa: Amphipoda, Copepoda, Ostracoda, Gastropoda (conch), Diatoma, Pyrosomata, and Foraminiferida. Four specimens possessed 113–550 developed ovarian eggs (maximum diameter 4.6 mm). Conocara werneri has been recorded previously only from subtropical zones of the eastern Atlantic and off New Zealand (south-western Pacific), the present specimens therefore representing the first record of the species from Japanese waters and northernmost record in the Pacific Ocean. The new standard Japanese name “Sedaka-yajiri-iwashi” is proposed for the species.

著者

遠藤 広光 北川 大二

出版者

The Ichthyological Society of Japan

雑誌

魚類学雑誌 (ISSN:18847374)

巻号頁・発行日

vol.53, no.1, pp.95-99, 2006

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A single merlucciid specimen (BSKU 70615, 472 mm in standard length), trawled off Hachinohe, Aomori Prefecture, Japan, was identified as <I>Merluccius productus</I> (Ayres, 1855) based on the following combination of counts: number of anal-fin rays (41), gill rakers on first arch (20/19), vertebrae (23+31=54), ribs (3), and lateral line scales (135). All other characters are consistent with those of the species previously described. Merluccius productus is distributed widely on the Pacific coast off North America from California to the Gulf of Alaska. It is also known from three records from Tatar Strait (the Sea of Okhotsk), Bering Sea, and Attu Island (west end of Aleutian Islands). The specimen is therefore the first recorded from Japan, and the western North Pacifc. This occurrence from outside of the normal distribution may be the result of some biological traits of the species such as strong swimming ability and offshore migration.

著者

遠藤 広光 岡村 収

出版者

日本魚類学会

雑誌

魚類学雑誌 (ISSN:00215090)

巻号頁・発行日

vol.38, no.4, pp.p433-437, 1992-02

著者

遠藤 広光 北川 大二

出版者

日本魚類学会

雑誌

魚類學雜誌 (ISSN:00215090)

巻号頁・発行日

vol.53, no.1, pp.95-99, 2006-05-25