著者

木村 祐貴 山中 智之 松井 彰子

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.66, no.1, pp.109-111, 2019-04-25 (Released:2019-04-25)

参考文献数

19

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A single female specimen (724 mm SL) of Japanese snook, Lates japonicus Katayama and Taki, 1984, was corrected in the mouth of the Ajigawa river, Osaka Bay, Japan on 20th August 2018, representing the second record of the species from Osaka Bay. The present record implicates that this fish was not resident but appeared accidentally in Osaka bay, because the bay lacks no suitable over-wintering habitat for L. japonicus.

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

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

伊藤 玄 北村 淳一 野口 亮太 長太 伸章 古屋 康則

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.20-034, (Released:2021-01-17)

参考文献数

25

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Exotic populations of Acheilognatus tabira found in northern Mie Prefecture, and subjected to nucleotide sequencing of the mitochondrial DNA cytochrome b region, were determined to represent the Hokuriku (A. t. jordani) and Kinki-Sanyo (A. t. tabira) lineages. The first record of A. t. jordani from outside its native distribution area (Japan Sea side of western Honshu), it is likely to be a viable population due to the presence at the sampling site of the freshwater mussel Beringiana fukuharai (Unionidae, Cristariini), with which the former likely has a spawning relationship.

著者

藤本 泰文 福田 亘佑

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.22-015, (Released:2022-12-26)

参考文献数

38

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Although overfishing has been recognized as a major factor threatening the existence of rare freshwater fishes, no case studies exist on the impact of collection pressure by fish enthusiasts and traders. In 2021, a habitat of reintroduced Acheilognathus typus, a species rarely seen the previous year, was visited every day by such enthusiasts. A monitoring survey indicated subsequently that the mean number of captured A. typus had decreased from 25.0 individuals/day in July 2021 to 1.6 individuals/day in October, the October 2021 figure being about one-tenth of that for September-October 2020. In addition, the standard length of A. typus in 2021 (56.8–59.5 mm) was greater than in 2020 (47.2 mm), possibly due to a thinning effect caused by the reduced fish numbers. During the period surveyed, some 50 to 100 fish enthusiasts and traders visited the habitat, apparently collecting thousands of A. typus by fishing or in bait traps. Such collecting pressure has clearly driven the reintroduced population of these rare fish to significantly low levels within a short period.

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

竹花 佑介 北川 忠生

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.57, no.1, pp.76-79, 2010 (Released:2014-03-05)

参考文献数

18

被引用文献数

8

著者

黒木 真理 渡邊 俊 塚本 勝巳

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.21-031, (Released:2022-07-04)

参考文献数

61

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Serious concern about the declining populations of the genus Anguilla and increasing related socioeconomic activities worldwide have led to a rise in the use of unauthorized Japanese names for members of this genus in various fields, as well as in academia. Therefore, it became important to clarify the standard Japanese names of all valid species and subspecies in the genus. Existing standard Japanese names for Anguilla species and subspecies were assessed, and new names proposed for some members, based on their geographical distribution and morphological characteristics, according to the nomenclature guidelines for standard Japanese fish names formulated by the Ichthyological Society of Japan in 2020. Standard Japanese names of three Japanese species and one subspecies were adopted from already-established names (Anguilla japonica, Nihonunagi; A. marmorata, Ō-unagi; A. bicolor pacifica, Nyūginia-unagi; A. luzonensis, Ugumaunagi); two Atlantic species were redefined (A. anguilla, Yōroppa-unagi; A. rostrata, Amerika-unagi); and the remaining eleven species and five subspecies were newly named (A. bicolor, Baikara-unagi; A. bicolor bicolor, Indo-baikara-unagi; A. dieffenbachii, Nyūjīrandoō-unagi; A. australis, Ōsutoraria-unagi; A. australis australis, Ōsutoraria-syōtofin-unagi; A. australis schmidtii, Nyūjīrando-syōtofin-unagi; A. reinhardtii, Ōsutoraria-rongufin-unagi; A. celebesensis, Serebesu-unagi; A. borneensis, Boruneo-unagi; A. interioris, Interia-unagi; A. megastoma, Porineshia-rongufin unagi; A. obscura, Porineshia-syōtofin-unagi; A. bengalensis, Bengaru-unagi; A. bengalensis bengalensis, Indo-bengaru-unagi; A. bengalensis labiata, Afurika-bengaru-unagi; A. mossambica, Mozanbīku-unagi).

著者

福地 伊芙映 立原 一憲

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.21-006, (Released:2022-02-17)

参考文献数

48

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The Daito (Borodino) islands, comprising three riverless oceanic islands (Minami-daito, Kita-daito and Oki-daito Islands) mostly bounded by rocky coasts, are the only southern Japanese islands located between the Ryukyu Archipelago and the Ogasawara islands. Identification of the mullet fauna on such oceanic islands should provide a clue to the dispersal ability of the family. Field surveys at Minami-daito and Kita-daito Islands were conducted in October 2019 and March 2020 resulting in five (Chelon macrolepis, Crenimugil crenilabis, Ellochelon vaigiensis, Mugil cephalus, Oedalechilus labiosus) and four mugilid species (Ch. macrolepis, Cr. crenilabis, Neomyxus leuciscus, O. labiosus) being collected from the respective islands. In addition, a specimen of Moolgarda seheli previously collected from Minami-daito Island, was found in the collection of the National Museum of Natural and Science (NSMT). All seven mugilid species are here recorded for the first time from the Daito Islands, supported by voucher specimens. A detailed description is provided for each species.

著者

小粥 淳史 北尾 圭梧 三内 悠吾 大貫 渓介

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.22-033, (Released:2023-05-29)

参考文献数

20

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Fifteen specimens of the Chinese false gudgeon Abbottina rivularis were collected from three rivers in the Lake Biwa–Yodo River system, Kyoto Prefecture, Japan for the first time in 38 years. A molecular phylogenetic analysis of mitochondrial cytochrome b gene sequences indicated that the specimen haplotypes completely matched two haplotypes included in the Honshu clade of the Japanese lineage, suggested as indigenous to Japan in a previous study. Further surveys are necessary to reveal the origin and distribution of the species in Kyoto Prefecture, and future conservation requirements, in addition to progressing biogeographic studies in the Kinki region.

著者

佐々木 賀治 澤田 直人

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.21-008, (Released:2021-09-17)

参考文献数

12

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The spawning environment and seasonal changes in appearance of the Japanese silurid catfish Silurus tomodai were investigated in an upstream reach of a river in northern Mie Prefecture, central Japan. Eggs and larvae of the species were primarily found in highly localized areas around plant roots or in shallow accumulated litter at the water’s edge. Silurus tomodai was apparent from April to November, its activity increasing in the breeding season (from May to July). Laboratory feeding experiments indicated that juvenile proportions of lower jaw length to snout length, snout length to head length (HL), and interorbital width to HL may show greater variation than their mature counterparts.

著者

伊藤 玄 旗 薫 北村 淳一 古屋 康則

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.20-24, (Released:2021-10-05)

参考文献数

27

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Non-native populations of Tanakia lanceolata were found in the Naruse River system, Miyagi Prefecture (Northern Honshu), Japan. Examination of nucleotide sequences of the mitochondrial DNA cytochrome b region indicated that the population was a genetic lineage of those naturally distributed in Western Honshu, Japan. In particular, a haplotype present in the Naruse River populations was consistent with one identified in populations in the Asahi and Kurashiki River systems, Okayama Prefecture.

著者

小泉 雄大 田城 文人

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.20-021, (Released:2020-09-10)

参考文献数

17

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A single large specimen [197.8 mm standard length (SL)] of the genus Chaunax Lowe, 1846 (Lophiiformes: Chaunacidae), captured during a commercial bottom trawl at a depth of 150–250 m off Cape Daio-zaki, Shima, Mie Prefecture, Japan on November 2016. Lacked markings on the body surface, thereby differing clearly from the three Japanese congeners (Chaunax fimbriatus Hilgendorf, 1879, Chaunax penicillatus McCulloch, 1915 and Chaunax abei Le Danois, 1978) known to date. Subsequently identified as Chaunax apus Lloyd, 1909, the specimen was characterized as follows: body without marking, reddish dorsally and paler ventrally (fresh condition), becoming uniformly whitish (preserved) ; tips of cirri on esca partially dark; dorsal surface of head lacking cirri; head length 39.3% SL; and 3 neuromasts in upper preopercular series, 3 in lower preopercular series, and 15 in pectoral series. The specimen represents both the northernmost and easternmost records of the species in the Pacific Ocean, in addition to being the first from Japanese waters. Intraspecific variation was noted in the count of spinules bridging the lateral-line complex (4–5 pairs in the present specimen vs. usually 3 pairs in previous reports of the species). The need for reconsideration of two of the three species groups recognized in the genus Chaunax [C. abei (including C. apus) and C. fimbriatus species groups] was discussed from the viewpoint of new morphological data obtained from the above specimen. The new standard Japanese name “Akafusen” is proposed for C. apus, in referring to its characteristic body shape and color.

著者

北村 淳一 金 銀眞 中島 淳 髙久 宏佑 諸澤 崇裕

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.20-012, (Released:2020-12-18)

参考文献数

25

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Habitat use of Misgurnus anguillicaudatus was surveyed at Tanushimaru, Kurume City, Fukuoka Prefecture, Kyushu Island, Japan, at winter season. The study site was composed as traditional agricultural ditches in parts of the paddy field with some parts of concrete artificial type of the canals. The spatial distribution of M. anguillicaudatus in the study area was examined in 36 square frames (1 m × 1 m) located spaced along agricultural pathway for approximately 20 m. Relationships between presence of M. anguillicaudatus and several environmental factors was analyzed using the generalized linear model (GLM). Result of the GLM analysis showed that probability of the presence of M. anguillicaudatus mainly explained by water depth and the probability increased with increasing water depth.

著者

岡本 誠 甲斐 嘉晃 三澤 遼 鈴木 勇人 時岡 駿

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.22-014, (Released:2022-09-07)

参考文献数

35

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A single specimen (130.0 mm standard length: SL) of Platyberyx mauli Kukuev, Parin and Trunov, 2012, collected at 452–453 m depth off Shizugawa Bay, Miyagi Prefecture, Japan, is the first record of the species from the Pacific Ocean. Previously reported only from the eastern central Atlantic, P. mauli is characterized by the following combination of characters: dorsal-fin rays 28 (28 in present specimen); anal-fin rays 17 (17); pectoral-fin rays 17 or 18 (18); total vertebrae number 33 or 34 (34); head length 30.4–33.9% SL (30.5% SL); body depth 45.6–52.2% SL (46.3% SL); prepectoral length 34.2–35.3% SL (34.2% SL); dorsal-fin base length 75.4–79.1% SL (76.1% SL); ventral caudal spur absent; procurrent rays cylindrical; gill rakers stout, rounded, with many small bristles, especially near tip and midway along each raker; jaw teeth in multiple rows anteriorly; posterior margin of upper jaw extending nearly to posterior margin of orbit; dorsal pharyngeal papillae multifid; conspicuous multifid papillae throughout inside of mouth cavity. The new standard Japanese name “Shamoji-yaegisu” is proposed for the species. Additionally, a single specimen (176.9 mm SL) of Platyberyx andriashevi (Kukuev, Parin and Trunov, 2012), collected off the Pacific coast of Hokkaido, represents the first record of the species from that region. A key to the six species of Caristiidae currently known from Japan is provided.

著者

中島 淳

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.69-76, 2017-04-25 (Released:2018-06-01)

参考文献数

28

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

井原 彩笑 石崎 大介 向井 貴彦

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.19-014, (Released:2020-07-03)

参考文献数

42

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Biological invasions by non-indigenous populations are one of the most serious problems for the conservation of genetic resources in natural environments, due to the likelihood of such populations becoming established and negatively impacting the genetic integrity of indigenous populations through hybridization and introgression. In central Japan, freshwater fish populations have been isolated by the Ibuki-Suzuka mountains between the Ise Bay basin (Gifu, Mie and Aichi prefectures on the eastern side of the mountains) and Lake Biwa water system (Shiga, Kyoto, Osaka and other prefectures on the western side), subsequently becoming genetically divergent. On the other hand, nonindigenous populations of freshwater fishes have been introduced to the rivers of the Ise Bay basin as a consequence of transplantation of commercially important Ayu (Plecoglossus altivelis altivelis) being accompanied by other species from Lake Biwa. Because some serious genetic disturbance of some species has already been reported from the former system, it is necessary to clarify the magnitude of such invasions and introduce measures for the conservation of native populations. This study focused on Japanese dace, Tribolodon hakonensis, one of the most common local fishes, which exhibits genetic differentiation between the Ise Bay basin and Lake Biwa system populations. Due to the superficial similarity between Japanese dace and Ayu, a bycatch of the former has been transported with Ayu from Lake Biwa to the other areas. To understand the magnitude of invasions from Lake Biwa, the PCR-RFLP method was used to discriminate between indigenous and non-indigenous mitochondrial DNA (mtDNA) haplotypes of Japanese dace in Gifu Prefecture rivers of the Ise Bay basin. Non-indigenous mtDNA haplotypes (Lake Biwa types) were found to be highly abundant in dam reservoirs, while less so in rivers, suggesting that Lake Biwa dace more easily adapt to the lacustrine environment of dam reservoirs than to river environments.

著者

山本 天誠 萩原 富司 諸澤 崇裕 加納 光樹

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.22-022, (Released:2022-11-25)

参考文献数

29

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The bitterling Acheilognathus macropterus, introduced from the continent of China to the Tone River system, including Lake Kasumigaura, is designated as an invasive alien species by the Invasive Alien Species Act of Japan, due to their potentially negative impacts on other threatened bitterling species through interspecific competition. Although ecological studies of immature and adult stages of A. macropterus have already been reported in both China and Japan, little is known about larval and juvenile stages in the wild. To ascertain habitat characteristics in early life stages of the species, spatial distribution of larval and juvenile A. macropterus and environmental variables were investigated at 131 sites in two river systems (Ono R. and Shintone R.) flowing into Lake Kasumigaura in June 2018. A total of 1,118 larval and juvenile specimens (5.8–18.4 mm in body length, BL) were collected using hand nets during the study period, ca. 93% of the total number being larvae. A generalized liner mixed model based on the data for larval density with a variety of environmental variables (i.e., water temperature, dissolved oxygen, water depth, flow velocity, vegetation density, mud content ratio in the bottom sediment, distance from a freshwater pearl farm, and wave height) at each site revealed that greater vegetation density with higher dissolved oxygen and distance to pearl farms utilizing the unionid hybrid mussel Sinohyriopsis schlegeli × S. cumingii were the most significant determinants of larval density. The results indicated that appropriate management of river vegetation and pearl farm factors are necessary for the establishment of essential controls, so as to manage the reproduction and expansion of A. macropterus in the Ono and Shintone River systems.

著者

園山 貴之 畑 弘己

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.22-007, (Released:2022-06-24)

参考文献数

31

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Torquigener albomaculosus has been found at depths of 10–30 m on the southern coast of Amami-Oshima Island, Kogoshima Prefecture, and at 100 m off Hamahika-jima Island, Okinawa Prefecture. However, there have been no reports on the morphology and pigmentation of the larvae and juveniles. Eggs of To. albomaculosus were collected from the southern coast of Kakeroma-jima Island, Kagoshima Prefecture, at a depth of 32 m, and development of eggs, larvae, and juveniles were observed in captivity. Comparisons were made with previous reports on the development of pufferfish species inhabiting Japan and adjacent seas. Eggs were 0.96 ± 0.02 mm (n = 20) in size, spherical in shape, colorless, transparent, demersal, and adhesive. Immediately after hatching, larvae were 2.43 ± 0.08 mm (n = 11) in total length and the number of myomeres was 8 + 11 = 19. Dendritic melanophores were present on the dorsal surfaces of the head and body, dorsal and ventral sides of the abdominal cavity, but were absent from the caudal region. The mouth and anus had already opened but the yolk still remained. The yolk was absorbed within 2 days of hatching. At 19 days after hatching, ossification of teeth began in the upper and lower jaws. Simple small spinules appeared on the gill covers and abdomen. They were pointed at the distal end and not divided. Black melanophores were distributed from the snout to the region between dorsal- and anal-fin bases, absent from the caudal region. The larvae became juveniles 36 days after hatching. At 61 days after hatching, the sides and dorsal surface of the body were silver, the ventral surface was yellow, and the area covered by small spinules extended posteriorly beyond the dorsal and anal fins. The larvae and juveniles of To. albomaculosus can be distinguished from those of other pufferfishes inhabiting the waters around Japan by the absence of black melanophores on the caudal region, the distribution and development process of small spinules, and body color.