著者

佐藤 真央 井上 裕太 溝脇 一輝 小林 大純 松尾 怜 外山 太一郎 日比野 友亮

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.20-036, (Released:2021-03-22)

参考文献数

14

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Twelve specimens (71.5–89.9 mm standard length) of the genus Lutjanus (Lutjanidae), collected from Ishigaki-jima Island, Ryukyu Archipelago, southern Japan, were identified as Lutjanus biguttatus (Valenciennes in Cuvier and Valenciennes, 1830), being characterized by the following combination of characters: dorsal fin XI, 12; anal fin III, 8; pectoral rays 15–16; body depth 3.5–3.8 in standard length; preorbital depth 10.8– 16.3 in head length; tongue smooth, without patch of fine granular teeth; a dark longitudinal band from snout to caudal fin base; and two white spots above the lateral line. Dentition of the premaxilla and dentary, including several canine-like (one being long and curved) and many small conical teeth, is illustrated. The collected specimens were determined to be juveniles, due to their coloration matching that of juveniles previously described, in addition to their small body size. Although the coloration of L. biguttatus is similar to that of L. vitta during the juvenile stage, the latter species is distinguished by greater body and preorbital depths. The specimens of the former had been caught in a significantly localized area (in ca. 4 m depth) over several days, indicating the likelihood of their having been schooling, as observed in previous studies of the species. Lutjanus biguttatus is distributed in the Indo-western Pacific, from the Maldives to the Solomon Islands, but had not previously been recorded from Japanese waters. The new standard Japanese name “Futahoshi-fuedai”, given in reference to the two white spots above the lateral line in the collected specimens, is proposed.

著者

松尾 怜 日比野 友亮

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.4, pp.9-11, 2020 (Released:2021-01-14)

著者

日比野 友亮 伊藤 雄一

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.22-011, (Released:2022-11-05)

参考文献数

23

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Two species of the moray eels, Gymnothorax mucifer Snyder, 1904 and Gymnothorax niphostigmus Chen, Shao and Chen, 1996 are reported from Japanese waters for the first time. The former has been previously recorded from Australia, Taiwan, New Caledonia and Hawaii, and the latter from Vietnam and Taiwan. Two specimens of G. mucifer [356 mm and 392 mm of total length (TL), collected from Okinawa Island] conformed with the diagnostic characters and the presence of dark streaks on the branchial basket of the species. Although Gymnothorax mucifer is closely similar to Gymnothorax kidako (Temminck and Schlegel, 1846) in general body coloration and proportions, they differ in color pattern of the anal fin (whitish margin mostly continuous but posteriorly represented by separated spots in G. mucifer vs. entirely continuous in G. kidako), the pattern of the lower jaw (no defined patterned vs. obscured reticulation), and the presence of dark streaks on the branchial basket (present vs. absent or not obvious). One specimen of G. niphostigmus (514 mm TL, collected from Danjo Islands, western Nagasaki Prefecture) fully conformed with the diagnostic characters of the species. The color of the margin of dorsal fin was described as “darkish” for the species in the original description. However, the species including holotype and paratypes has a broken whitish margin on the fin. Although G. niphostigmus is closely similar to Gymnothorax intesi (Fourmanoir and Rivaton, 1979) in both proportional characters and coloration, the former is characterized by smooth edges of the teeth (vs. distinct serrations), the presence of mid-premaxillary teeth (vs. absent), and the margin of the dorsal fin coloration discontinuous whitish, the width less than the anal fin margin (vs. continuous whitish, the width similar to the anal fin margin). The new standard Japanese names, “Takanoha-utsubo” and “Watayuki-utsubo”, are proposed for G. mucifer and G. niphostigmus, respectively.

著者

坂上 嶺 佐藤 駿 松重 一輝 安武 由矢 日比野 友亮 眞鍋 美幸 内田 和男 望岡 典隆

出版者

公益社団法人 日本水産学会

雑誌

日本水産学会誌 (ISSN:00215392)

巻号頁・発行日

pp.20-00054, (Released:2021-03-12)

参考文献数

42

被引用文献数

5

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ニホンウナギ資源減少の原因の1つとして,鳥類からの被食リスクを低減する隠れ場所となると考えられる浮き石の,河川改修による減少が挙げられる。本研究では,浮き石による間隙の存在が,本種の生残に影響を与えるかを検証するために,間隙が利用可能な池と利用不可能な池の2群における生残率と肥満度の変化量を比較する実験を行った。その結果,間隙が利用可能な池では供試魚の生残率が有意に高く,浮き石による間隙は捕食者である鳥類から餌として発見される可能性を下げる効果があることが確認された。

著者

是枝 伶旺 久木田 直斗 日比野 友亮 本村 浩之

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.35, pp.28-34, 2023-08-28 (Released:2023-08-29)

著者

武藤 滉 日比野 友亮 星野 浩一 橋本 颯

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.21-011, (Released:2021-07-08)

参考文献数

19

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Two specimens [FRLM 60553, 737.0 mm of total length (TL); SNFR 21750, 619.1 mm TL] of the moray eel Gymnothorax reevesii (Richardson, 1845) (new standard Japanese name “Mame-utsubo”) are reported from Shimane Prefecture (southwestern coast of Sea of Japan) and the East China Sea, respectively. Although the species has been reported as distributed in the South China Sea to Japan, in addition to Samoa and the Marquesas Islands, verification of the locality and identity of the two records from Japanese waters known to date are problematic. Accordingly, the specimens reported here are the first reliable, voucher supported records of G. reevecii from Japan, that from Shimane Prefecture being the northernmost record for the species.

著者

大戸 夢木 坂上 嶺 日比野 友亮 松重 一輝 内田 和男 望岡 典隆

出版者

公益社団法人 日本水産学会

雑誌

日本水産学会誌 (ISSN:00215392)

巻号頁・発行日

pp.21-00043, (Released:2022-03-16)

参考文献数

39

被引用文献数

2

---

ニホンウナギの成長や降海時の順応の場である汽水域のハビタットの劣化は著しい。本研究では,このハビタットの創出・復元を目標に,本種がどのような浮石間隙構造を好むかを生活史段階ごとに検証した。汽水域において異なるサイズの石(大,長軸30 cm;中,20 cm;小,10 cm)を詰めた石倉カゴ(研究用漁具)の利用状況を比較したところ,未成熟のクロコや黄ウナギは間隙が細かい「小」を好むが,海へ産卵に向かう銀ウナギは「大」,「中」のみで出現した。これは,間隙構造の多様性が河川生活を完結する上で重要であることを示唆している。

著者

田和 篤史 田原 義太慶 日比野 友亮

出版者

日本魚類学会

雑誌

魚類学雑誌 (ISSN:00215090)

巻号頁・発行日

pp.17-050, (Released:2018-03-30)

参考文献数

24

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Snake eels in the genus Myrichthys, characterized by molariform teeth, moderate to very elongate body, short snout, dorsal fin origin before gill openings, short pectoral fin, anterior nostrils tubular and elongate, posterior nostrils opening into mouth, and spotted and/or striped coloration, include 10 valid species and are commonly found along most tropical shores worldwide. Two species, Myrichthys colubrinus (Boddaert, 1781) [striped coloration] and Myrichthys maculosus (Cuvier, 1816) [spotted coloration], having been previously recorded from Japan, Myrichthys paleracio McCosker and Allen, 2012 is described here from two specimens found in the stomach contents of a sea snake Laticauda laticaudata (Linnaeus, 1758) from Iriomote Island, Okinawa Prefecture, Japan, being the first speciemen-supported record of the species from Japan and the northernmost record of distribution. Myrichthys paleracio most closely resembles M. colubrinus in having striped body coloration, but differs in having 183 total vertebrae (vs. 193–202) and more than 50 irregularly patterned brown stripes (vs. 25–35 arranged in a regular pattern). The absence of an ethmoid pore on the head in one specimen was considered to be a malformation. A new standard Japanese name “Madara-shima-umihebi” proposed for the species. An underwater photograph of a snake eel from Yakushima Island, Kagoshima Prefecture, Japan, was identified as M. paleracio.

著者

日比野 友亮 中村 亨 木村 清志

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.42, pp.48-53, 2017-02-28 (Released:2017-02-28)

参考文献数

9

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A specimen of the tilefsh, Hoplolatilus fourmanoiri Smith, 1964 was collected from off Amitori Bay, Iriomote Island, Yaeyama Islands of the Ryukyu Islands, Japan. It represents the northernmost record for the species and the first record of the species from Japan. Hoplolatilus fourmanoiri can be distinguished from its congeners by the following combination of characters: caudal fin not forked; pointed spines located at corner of the preopercle and the mid-posterior margin of the opercle; maxillary broad, its maximum depth almost equal to diameter of pupil; ctenii of scales prominent; a large dark blotch located at posterior tail to caudal fin; a yellow band running from head to shoulder. The present specimen has a slightly deeper head (69.7% of head length vs. 62–68%) and more scales below lateral line (42 vs. 34–41) than other specimens, but these differences are insignificant. The dark posterior blotch of the present specimen is paler and more yellowish than the previous report, however the body coloration of the Japanese specimen is paler, which we feel is due to the condition of the specimen. The shape of the caudal fin of H. fourmanoiri was formerly described as truncate with dorsal produced. We described it as shallow double truncate. A new standard Japanese name “Hotarubi-sango-amadai” is proposed for the species.

著者

大戸 夢木 坂上 嶺 日比野 友亮 松重 一輝 内田 和男 望岡 典隆

出版者

公益社団法人 日本水産学会

雑誌

日本水産学会誌 (ISSN:00215392)

巻号頁・発行日

vol.88, no.3, pp.152-161, 2022-05-15 (Released:2022-05-21)

参考文献数

39

被引用文献数

2

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ニホンウナギの成長や降海時の順応の場である汽水域のハビタットの劣化は著しい。本研究では,このハビタットの創出・復元を目標に,本種がどのような浮石間隙構造を好むかを生活史段階ごとに検証した。汽水域において異なるサイズの石(大,長軸30 cm;中,20 cm;小,10 cm)を詰めた石倉カゴ(研究用漁具)の利用状況を比較したところ,未成熟のクロコや黄ウナギは間隙が細かい「小」を好むが,海へ産卵に向かう銀ウナギは「大」,「中」のみで出現した。これは,間隙構造の多様性が河川生活を完結する上で重要であることを示唆している。

著者

日比野 友亮 折田 大志

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.26, pp.30-33, 2022-11-21 (Released:2022-11-22)

著者

坂上 嶺 佐藤 駿 松重 一輝 安武 由矢 日比野 友亮 眞鍋 美幸 内田 和男 望岡 典隆

出版者

公益社団法人 日本水産学会

雑誌

日本水産学会誌 (ISSN:00215392)

巻号頁・発行日

vol.87, no.3, pp.255-264, 2021-05-15 (Released:2021-05-23)

参考文献数

42

被引用文献数

5

---

ニホンウナギ資源減少の原因の1つとして,鳥類からの被食リスクを低減する隠れ場所となると考えられる浮き石の,河川改修による減少が挙げられる。本研究では,浮き石による間隙の存在が,本種の生残に影響を与えるかを検証するために,間隙が利用可能な池と利用不可能な池の2群における生残率と肥満度の変化量を比較する実験を行った。その結果,間隙が利用可能な池では供試魚の生残率が有意に高く,浮き石による間隙は捕食者である鳥類から餌として発見される可能性を下げる効果があることが確認された。

著者

是枝 伶旺 日比野 友亮 本村 浩之

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.5-9, 2021 (Released:2021-11-02)

著者

佐藤 真央 長嶋 祐成 日比野 友亮

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.21-039, (Released:2022-04-28)

参考文献数

30

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A specimen (39.1 mm standard length) of the genus Ostorhinchus Lacepède, 1802, collected from Ishigaki-jima Island, the Ryukyu Archipelago, southern Japan, was identified as Ostorhinchus hartzfeldii (Bleeker, 1852). The specimen showed characteristic coloration of the species, including the following features: four slightly wavy longitudinal silver lines on the head and body, the dorsalmost running along the dorsal body margin to the caudal fin base, and the others terminating on the trunk or caudal peduncle; the entire body base color brown; all fins slightly reddish, transparent; a dark spot on the caudal fin base, of similar size to the pupil. Ostorhinchus hartzfeldii is similar to Ostorhinchus cookii (Macleay, 1881), Ostorhinchus nigrofasciatus (Lachner, 1953), and Ostorhinchus taeniophorus (Regan, 1908), but differs from them by having only the dorsalmost longitudinal silver line reaching the caudal fin base (vs. three or four lines reaching the fin base in the other three species) and absence of a longitudinal silver line on the ventrolateral aspect of the trunk (vs. present). Ostorhinchus hartzfeldii is distributed in the western Pacific, from the South China Sea to Australia, but had not previously been recorded from Japanese waters. A photographic record of the species from Ishigaki-jima Island is also included. The new standard Japanese name “Sazanami-ishimochi” is proposed, a reference to the slightly wavy silver lines that disappear with growth, based on the specimen collected from Ishigaki-jima Island.

著者

日比野 友亮 緒方 悠輝也 松尾 怜 大衛 亮正 小原 直人 栗原 巧 斎木 悠亮

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.16, pp.18-24, 2022 (Released:2022-01-18)

著者

佐藤 真央 井上 裕太 溝脇 一輝 小林 大純 松尾 怜 外山 太一郎 日比野 友亮

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.68, no.1, pp.17-22, 2021

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<p>Twelve specimens (71.5–89.9 mm standard length) of the genus <i>Lutjanus</i> (Lutjanidae), collected from Ishigaki-jima Island, Ryukyu Archipelago, southern Japan, were identified as <i>Lutjanus biguttatus</i> (Valenciennes in Cuvier and Valenciennes, 1830), being characterized by the following combination of characters: dorsal fin XI, 12; anal fin III, 8; pectoral rays 15–16; body depth 3.5–3.8 in standard length; preorbital depth 10.8– 16.3 in head length; tongue smooth, without patch of fine granular teeth; a dark longitudinal band from snout to caudal fin base; and two white spots above the lateral line. Dentition of the premaxilla and dentary, including several canine-like (one being long and curved) and many small conical teeth, is illustrated. The collected specimens were determined to be juveniles, due to their coloration matching that of juveniles previously described, in addition to their small body size. Although the coloration of <i>L. biguttatus</i> is similar to that of <i>L. vitta</i> during the juvenile stage, the latter species is distinguished by greater body and preorbital depths. The specimens of the former had been caught in a significantly localized area (in ca. 4 m depth) over several days, indicating the likelihood of their having been schooling, as observed in previous studies of the species. <i>Lutjanus biguttatus</i> is distributed in the Indo-western Pacific, from the Maldives to the Solomon Islands, but had not previously been recorded from Japanese waters. The new standard Japanese name "Futahoshi-fuedai", given in reference to the two white spots above the lateral line in the collected specimens, is proposed.</p>

著者

日比野 友亮

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.1, pp.59-64, 2017-04-25 (Released:2018-06-01)

参考文献数

16

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A single specimen of the catfish, Silurus lithophilus (Tomoda, 1961), was found in the collection of the Natural History Museum, London. The catalog number of the specimen (BMNH 1910.6.30.18) indicates that it was registered on 30 June 1910, long before the collection of the holotype of S. lithophilus (April 1961), previously believed to be the first collected example of the species. Accordingly, the Natural History Museum specimen represents the oldest known example of the species. It is inferred that the specimen was collected during the 6th collecting survey of Mr. Richard Gordon Smith (from November 1905 to mid 1907), the precise date not being apparent in his excerpted diary published by Ms. Victoria Manthorpe. The collection locality of the specimen was noted as Kyoto on the jar label and in the museum collection database. However, a personal tag attached by Mr. Gordon Smith noted its collection from Lake Biwa. Apparently, the specimen was purchased at Kyoto after having been originally collected at Lake Biwa.

著者

日比野 友亮 笹木 大地 木村 清志

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.63, no.1, pp.33-38, 2016-04-25 (Released:2018-04-25)

参考文献数

14

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The cosmopolitan genus Opistognathus Cuvier, 1816, characterized by unforked dorsal-fin spines, currently comprises 64 valid species, including Opistognathus variabilis Smith-Vaniz, 2009, described on the basis of 71 specimens and widely known from the Maldives, Andaman Sea, Indonesia, Philippines, Palau, Taiwan, Ryukyu Islands and Vanuatu. However, the Japanese record was based solely on an underwater photograph taken off Iriomote Island, Ryukyu Islands. A single example of the species, collected from Yonaguni Island, Yaeyama Islands, represents the first record of the species from Japan supported by a voucher specimen. Opistognathus variabilis closely resembles Opistognathus albicaudatus Smith-Vaniz, 2011 and Opistognathus castelnaui Bleeker, 1860 in having an elongate upper jaw, numerous longitudinal scales and similar body coloration, including 7–10 dark blotches along the dorsal-fin base. However, the former can be distinguished from O. albicaudatus by the poreless Y-shaped area dorsally on the head (vs. absent) and 9–11 procurrent caudal-fin rays (vs. 6–7), and from O. castelnaui by having 68–92 longitudinal scale rows (vs. 90–110), the dorsal fin deeper posteriorly (vs. similar depth along entire length), a single stripe on the upper jaw inner surface (vs. two), and seven or eight mid-lateral blotches along the body (vs. three or four irregular dark horizontal lines and/or dark reticulations laterally on body). The new Japanese standard name “Shishidama-ohkuchi-amadai” is proposed for O. variabilis.