著者

幸 大二郎 中村 潤平 齊藤 智顕 柏木 伸幸 本村 浩之

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.23-021, (Released:2023-09-15)

参考文献数

16

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The pipehorse genus Solegnathus Swaison, 1839 is divided into two subgenera, Solegnathus Swaison, 1839 (superior trunk ridge discontinuous, with superior tail ridge) and Runcinatus Whitley, 1929 (ridges continuous), the former including Solegnathus (Solegnathus) hardwickii (Gray, 1830), S. (S.) lettiensis Bleeker, 1860, S. (S.) spinosissimus (Günther, 1870), and S. (S.) robustus McCulloch, 1911, and the latter, S. (Runcinatus) dunckeri Whitley, 1927. Of these five species, only S. (S.) hardwickii and S. (S.) lettiensis, have been recorded to date from Japanese waters, the latter being known from only two specimens [259.6 mm and 284.6 mm total length (TL)], both reported from the middle of the Okinawa Trough, southern East China Sea in 1978. However, a single specimen (KAUM–I. 182558, 367.0 mm TL) of S. (S.) lettiensis was found on a beach on Kamikoshiki-shima Island, Koshiki Islands, northern East China Sea, Kagoshima Prefecture, Japan in December 2022, probably a discarded bycatch from a deepwater bottom trawl fishery operating off the island. The specimen was characterized by having the superior trunk ridge discontinuous, with a superior tail ridge; opercular membrane without bony side platelets; body surface mainly tuberculate; length of dorsal-fin base 1.41 in head length; 23 trunk rings; and 74 total rings, and its identification confirmed after comparison with the two previously-collected specimens (above). The former, representing the second Japanese record and northernmost record of S. (S.) lettiensis, is described herein in detail, and the new standard Japanese name “Shinkai-sumitsuki-yoji” proposed for the species.

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

森 俊彰 岡本 誠 山内 信弥 石井 輪太郎 城倉 昴

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.22-013, (Released:2023-01-16)

参考文献数

24

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Three juvenile specimens of Odontanthias borbonius were collected from Suruga Bay (2 specimens, 20.0–23.4 mm standard length (SL), 95–100 m depth) and Okinawa (23.7 mm SL, 180 m depth), Japan. Because little is known of juvenile morphology of the species, the specimens are described and compared with adults from Japan. Fresh coloration of the juveniles was similar to that of adults, being characterized by a pale pink body and large yellow spots. Following fixation, the juvenile coloration was lost, although black pigment vesicles scattered in the former positions of the yellow spots indicated that O. borbonius can be distinguished from all other congeners, which lack such spots. Juveniles of the former had a large, smooth, interopercular spine, the supraocular ridge with serrations, and serrated posttemporal spines.

著者

松葉 成生 吉見 翔太郎 井上 幹生 畑 啓生

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.61, no.2, pp.89-96, 2014-11-05 (Released:2016-12-25)

参考文献数

25

被引用文献数

3

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Phylogeographic analysis of the bitterling Tanakia limbata in western Japan was conducted to identify the origin of the fish population in Ehime, Shikoku Island. A survey of rivers and spring-fed ponds on the Matsuyama Plain, Ehime, indicated that T. limbata had become distributed on the plain over a period of 19 years to the present day. Sequences of the mitochondrial cytochrome b gene indicated that the 42 individuals sampled included 4 haplotypes, which were shared with a T. limbata population in the Yabe River, Fukuoka, Kyushu Island. All 4 haplotypes belonged to the West Kyushu group of T. limbata. On the other hand, T. limbata comprising the West Seto clade inhabits western Honshu and eastern Kyushu, which regions shared the same paleoriver system with Ehime 20,000 years BP. These results suggest that individuals of T. limbata presently collected in Ehime originated from the Yabe River or adjacent waters, having artificially transported over the mountain chain that may act as a natural barrier separating the West Kyushu and West Seto groups. To conserve an endangered native bitterling, T. lanceolata, in Ehime, management of the introduced T. limbata, so as to prevent competition and hybridization with the former, is necessary.

著者

西大 嵩樹 丸山 敦

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.113-119, 2017-11-25 (Released:2018-06-19)

参考文献数

26

被引用文献数

2

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Increased turbidity is known to affect feeding of predatory fishes through its effect on prey color, but interactions between turbidity and prey color are not well documented. To determine the effects of turbidity, water temperature, and illuminance on lure color selected by rainbow trout (Oncorhynchus mykiss), investigations were conducted in a fishing pond in Shiga Prefecture (Central Japan) for 11 days during July–October, 2016. Five fishing series with different lures were conducted on each day, eight differently colored lures being used in random order in each series (10-min trials × 8 colors). Generalized linear models, used to explain catch number variations per 10 min (0–6 individuals; Poisson distribution assumed), indicated that turbidity (1.0–13.6 NTU) significantly influenced lure color selection by rainbow trout. Results indicated that brown lures (followed by dark green, black, and gold lures) were most preferred in low turbidity, but least preferred when turbidity was high. In contrast, lures with a greater reflection intensity [pink, orange, and karashi (mustard yellow)] were moderately preferred, regardless of turbidity. Illuminance (1.2 × 102–2.9 × 105 lux) and water temperature (15.2– 25.5˚C) did not affect lure color selected by rainbow trout, but both parameters negatively impacted the number of individuals captured per 10 min. The findings highlighted the importance of environmental conditions (particularly turbidity) on prey preference by predatory fishes.

著者

小幡 光汰 古庄 誠 今村 央 成松 庸二

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.23-018, (Released:2023-08-05)

参考文献数

26

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Five specimens of scaleless dragonfish of the genus Melanostomias (Stomiidae: Melanostomiinae) were collected off the Ogasawara Islands, southern Japan and Fukushima Prefecture, Pacific coast of northern Japan. The specimens conformed to Melanostomias nigroaxialis Parin and Pokhilskaya, 1978 as follows: tips of the upper and lower jaw teeth bifurcated; chin barbel distally expanded from midpoint, the dorsal and ventral expanded areas membranous and transparent, and including small luminous bodies; a single ovoid body without a terminal filament on terminal part of chin barbel; distinct luminous patch on dorsal surface of head absent; and axis of chin barbel almost entirely black, except terminal part. However, the present specimens had a shorter chin barbel than noted in the original description of M. nigroaxialis. Because a plot of barbel lengths (as % of standard length) versus standard length of the present specimens and three specimens examined in the original description indicated that barbel lengths tended to decrease with growth, the difference in barbel length between the two groups of specimens was consistent with intraspecific variation. In addition, the present specimens had different numbers of VAV, AC, IC, VAL and OA photophores compared with the original description of M. nigroaxialis, although the ranges were less than the those in many congeneric species, also indicative of intraspecific variation. Consequently, the present specimens were identified as M. nigroaxialis, previously known only from the Banda Sea, southern Philippines Sea and northern New Zealand. This is the northernmost record of M. nigroaxialis, and first from Japanese waters. The new standard Japanese name “Tomoshibi-kanten-tokagegisu” is proposed for this species.

著者

向井 貴彦 二村 凌 丹羽 大樹 後藤 暁彦 三輪 直生 石塚 航 矢追 雄一 高木 雅紀

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.62, no.2, pp.149-156, 2015-11-05 (Released:2018-03-26)

参考文献数

35

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Japanese char Salvelinus leucomaenis, red-spotted masu salmon Oncorhynchus masou ishikawae, hybrid individuals were collected from a tributary of the Ibigawa River, Gifu Prefecture, Japan. The char and hybrids were mainly distributed in the headwater area where eyed eggs of red-spotted masu salmon are released in each year. Principal component analysis (PCA) of the morphological features of parental and hybrid individuals indicated that hybrid body shape was similar to that of char. Partial nucleotide sequences of mitochondrial DNA indicated the female parental species to be red-spotted masu salmon, without exception. Genotyping of three loci of short interspersed repetitive elements (SINE) of inserted alleles showed all hybrid individuals to be F1, with no evidence of backcrossing. These results indicated that the introduced red-spotted masu salmon hybridized with male char, with a high survival rate of sterile F1 offspring.

著者

竹下 直彦 鬼倉 徳雄

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.58, no.2, pp.202-205, 2011 (Released:2014-03-07)

参考文献数

26

著者

和田 英敏 伊東 正英 本村 浩之

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

2019

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<p>During an ichthyofaunal survey of southwestern Satsuma Peninsula, Kagoshima Prefecture, Japan, a single pompano specimen (748.0 mm standard length, 814.0 mm fork length) was collected by set net at a depth of 20 m on 24 November 2018. The specimen was subsequently identified as <i>Trachinotus anak</i> Ogilby, 1909, having the following combination of characters: dorsal-fin rays VI-I, 18; anal-fin rays II-I, 16; snout profile essentially straight immediately above upper lip; upper lip separated from snout by a continuous deep groove; a narrow band of villiform teeth on lower jaw; teeth on tongue absent; supraoccipital bone thin and blade-like; nasal and lacrimal bones hyperossified; first supraneural bone an inverted "L" shape; first to third ribs hyperossified; no distinct pattern (e.g., blotches or bands) on lateral body surface; and anal-fin lobe yellow, the anterior margin lacking brownish coloration. Because of the superficial similarity of <i>T. anak</i> to <i>T. mookalee</i> Cuvier, 1832, differentiation between the species sometimes requiring dissection, previous Japanese records of <i>T. mookalee</i> were re-examined. <i>Trachinotus mookalee</i> was confirmed as occurring in Japanese waters, but is known only from a single specimen from Miyazaki Prefecture, east coast of Kyushu, southern Japan. <i>Trachinotus anak</i> was previously known only from Taiwan, northern and eastern Australia, and New Caledonia, the present specimen from Kagoshima representing the first record from Japan and northernmost record for the species. The new standard Japanese name "Yokozunamarukoban" is herein proposed for the species.</p>

著者

樋口 淳也 Kim Seong-yong 河合 俊郎

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.23-013, (Released:2023-10-05)

参考文献数

27

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A single specimen of Krusensterniella (Perciformes: Zoarcidae), collected off Tsugaru Peninsula, Aomori, Japan, was identified as Krusensterniella squamosa Chernova, 2022, characterized by three pungent spines in the dorsal fin, 47 dorsal-fin spines, at least 101 dorsal-fin rays and 103 vertebrae, and previously known only from the holotype, collected off Iwate, Japan. The new standard Japanese name “Uroko-haregaji”, referring to the scaled body, is proposed for the species. Records of Krusensterniella notabilis from Japan are unlikely to be that species, since many identification sources for Japanese fishes in correctly described K. notabilis as having a broad scaled area on the body.

著者

中島 廉太朗 美馬 純一 鬼倉 徳雄 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.22-003, (Released:2022-12-26)

参考文献数

62

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The phylogeographic patterns of freshwater fishes provide clues for understanding the relationships between geological events and biota formation. In central Honshu, Japan, many mountain ranges (e.g., the Fossa Magna) divide watershed areas, resulting in long-term biogeographical barriers to the freshwater fishes. Almost all of the freshwater fishes from the upland areas, however, occur naturally in more than one river system. Such ichthyofaunal similarity among river systems is hypothesized as having resulted from headwater river captures. Accordingly, to clarify the processes behind present-day ichthyofaunal patterns in the upland area of central Honshu, the present study investigated the mitochondrial phylogeographic pattern of upstream fat minnow, Rhynchocypris oxycephala, distributed in mountainous streams in western Japan. The phylogenetic analyses, using mitochondrial cytochrome b gene sequences (1,140 bp) obtained from 451 individuals from 86 sites throughout the species distribution range, indicated eight major clades in Japan. Of these, the Biwa-Tokai clade was distributed in the major area of central Honshu, and divided into three geographically differentiated groups: (i) Lake Biwa group in the tributaries that flow into Lake Biwa; (ii) Ise Bay group in the Pacific drainages that flow into Ise Bay, and (iii) Hida group in the Japan Sea drainages. These groups were isolated by watershed areas in the IbukiSuzuka and Hida Mountains. However, haplotype distributions in the headwaters of the Shou (Japan Sea side) and Nagara Rivers (Pacific side) suggested former dispersal of freshwater fishes from the Pacific to Japan Sea drainages via river capture in the Hirugano Highlands watershed area. Similar distributions of mtDNA haplotypes observed in three other headwater areas also suggested previous river captures. During the present study, however, some mtDNA haplotypes collected from Gifu, Shizuoka and Kanagawa Prefectures were found to be identical to those in the Lake Biwa group, suggesting that artificial transplantations of R. oxycephala had occurred in several areas.

著者

古満 啓介 山口 敦子

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

pp.20-042, (Released:2021-06-12)

参考文献数

27

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Six specimens collected from Kochi, Nagasaki, Kagoshima, and Okinawa Prefectures, on the Pacific Coast and the East China Sea, and seven museum specimens, were identified as the purple ray Myliobatis hamlyni Ogilby, 1911, based on a combination of specific morphological characteristics. Initially considered an Australian endemic, subsequent studies have shown M. hamlyni to have a patchy distribution from the Australian coast to Japan, the latter record being based on a single specimen collected from Okinawa Prefecture. However, the current study has revealed the widespread distribution of M. hamlyni in waters from the surface to 500 m depth off southwestern and western Japan, a specimen from Kanagawa Prefecture representing the northernmost record of the species. Because the distribution of M. hamlyni may broadly overlaps that of the Japanese species M. tobijei, and morphometric characters and depth preference separating them suggested in the previous study were unclear, detailed comparisons were made so as to establish a basis for distinguishing between the two species in the present study. Myliobatis hamlyni differs most clearly from M. tobijei as follows: greatest span of pelvic fins 20.9–24.7% (mean 23.5%) of disc width [vs. 27.1–36.3% (30.7%) in M. tobijei], greatest span of pelvic fins 44.5–53.6% (50.4%) of pectoral-fin posterior margins [vs. 58.8–78.5% (67.4%)], and distance from edge of disc to first gill slit 51.0–68.3% (57.6%) of distance from pectoral-fin insertion to dorsal-fin origin (horizontal) [vs. 32.4–44.7% (41.3%)]. The new standard Japanese name “Sumire-tobiei” is proposed for M. hamlyni.

著者

馬渕 浩司 西田 一也 吉田 誠

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.19-012, (Released:2019-08-10)

参考文献数

23

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A total of 351 eggs from 12 egg populations was collected in June 2018 from a revetmented tributary of the Chounogi River, ca. 2 km upstream from Lake Biwa. Analysis of 95 of these eggs (sampled about equally from all populations) by a 2 or 3-step DNA identification process resulted in 71 being successfully sorted into the following five taxa: Gnathopogon caerulescens (25 eggs), Carassius buergeri grandoculis (22), triploid Carassius (4), and Japanese (8) and Eurasian (12) species of Cyprinus. Of these five taxa, G. caerulescens, C. buergeri grandoculis, and Japanese Cyprinus sp. are thought to migrate upstream to spawn, as they are more commonly found in the lake. Notably, 60% of the collected eggs were attached to the substrata provided by riverside trees (the remaining 40% were attached to vegetation hanging into the stream). Unfortunately, these trees were removed during a river renovation procedure conducted just after this study.

著者

松沼 瑞樹 内田 喜隆 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

vol.66, no.2, pp.253-260, 2019 (Released:2019-11-28)

参考文献数

11

被引用文献数

1

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A single specimen of Scomberoides commersonnianus (Carangidae), previously recorded only from Kagoshima, Miyazaki and Toyama prefectures in Japan, was recently collected off Yamaguchi Prefecture (34˚25.3'N, 131˚21.0'E), southwestern Japan Sea. The newly collected specimen (FAKU 146095, 401.8 mm SL, 424.8 mm FL), representing the fourth Japanese record of the species, was probably transported by the Tsushima Current, flowing northward off the west coast of Kyushu and the Japan Sea coast of mainland Japan. A checklist of 27 carangid fishes found in Wakasa Bay and adjacent waters, central Japan Sea coast of Japan is also provided.

著者

ジョン ビョル 大富 潤 本村 浩之

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.22-018, (Released:2023-03-08)

参考文献数

25

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Four specimens (390.5–576.0 mm standard length; SL) of Etelis boweni Andrews, Fernandez-Silva, Randall and Ho, 2021 (Perciformes: Lutjanidae), collected from the Osumi Islands, Kagoshima Prefecture, Japan, were similar to Etelis carbunculus Cuvier, 1828 in sharing the following characters: dorsal fin with a deep notch and lacking scales; maxilla covered with scales; caudal-fin lower lobe whitish; and length of caudal-fin upper lobe greater than 3.3 in SL. However, the specimens differed from E. carbunculus in having the opercular spine posterior end rounded (pointed in the latter), 14 scale rows below the lateral line (vs. 12), and tip of the caudal-fin upper lobe black in both fresh and preserved specimens (vs. reddish in fresh specimens, yellowish in preserved specimens). Furthermore, a sequence analysis of the mitochondrial cytochrome oxidase I gene of the four Osumi Islands’ specimens showed a divergence of only 0.0–0.5% from the holotype of E. boweni, the five specimens comprising a clade separated by 7.5–8.8% sequence divergence from E. carbunculus. Although E. boweni is widely distributed in the IndoWest Pacific (from the Red Sea and Seychelles to Samoa), the Osumi Islands’ specimens (for which the standard Japanese name “Oo-akamutsu” is newly proposed) represent the first specimen-based records of Etelis boweni from Japanese waters as well as from the northwestern Pacific Ocean. Additionally, the apparently sympatric occurrence of E. boweni and E. carbunculus was evidenced by the collection together of the two species (KAUM–I. 160343, 390.5 mm SL and KAUM–I. 160342, 407.9 mm SL, respectively).

著者

向井 貴彦 橋本 昌尚

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.22-021, (Released:2023-02-24)

参考文献数

41

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The weather loach Misgurnus anguillicaudatus, an important freshwater fish in rural areas of Japan, although comprising both native and non-native mitochondrial DNA lineages, exists in reduced populations in many prefectures and is listed as NT (Near Threatened) in the Red List (Ministry of the Environment of Japan, 2020). On the other hand, the pond loach M. dabryanus, introduced into Japan from continental Asia, is expanding its distribution in various parts of the country. A survey of the spatial distributions of M. anguillicaudatus (native and non-native lineages) and M. dabryanus in Ichinomiya (113.8 km2), Aichi Prefecture, Japan, examined 117 agricultural ditch sites for presence/absence of the loaches from May to August, 2020. Native and non-native M. anguillicaudatus were identified by mitochondrial cytb gene sequencing. Although loaches were collected from 52 of 117 sites, M. dabryanus was dominant (293 individuals from 41 sites) over M. anguillicaudatus (55 individuals from 14 sites), the species co-occurring at only three sites. The relationships between loach presence and several environmental factors were analyzed using the generalized linear model (GLM), which showed that the probability of loach presence (either species) was mainly explained by the presence of ditch vegetation (positive effect) and proportion of agricultural land use (but not paddy fields) (negative effect). The probability of M. anguillicaudatus presence (versus M. dabryanus) was mainly explained by water depth in winter. The results indicated that an increase in concrete ditch construction (no vegetation) and conversion of paddy fields to other agricultural usages, may result in habitat reduction for both species, whereas a decrease in water depth in winter may promote an increase in M. dabryanus. The mtDNA analysis showed that the native lineage of M. anguillicaudatus was found in only 7 sites, thus being critically endangered in the area.

著者

望岡 典隆

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.33-35, 2014-04-25 (Released:2016-05-22)

参考文献数

19

被引用文献数

3

著者

伊藤 玄 古屋 康則 堀池 徳祐 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

vol.67, no.1, pp.41-50, 2020-04-25 (Released:2020-05-02)

参考文献数

39

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An examination of the genetic population structure of Cobitis minamorii tokaiensis in central Honshu Japan, based on mitochondrial DNA nucleotide sequences in the cytochrome b region, revealed that the subspecies is subdivided into three regions (West-Shizuoka, Mie, and Aichi-Gifu) on the evidence of haplotype distribution and pairwise Φst among populations. However, the phylogenetic analyses indicated that the haplotypes in the three regions belong to the same haplotype group, suggesting that C. m. tokaiensis dispersed following the interconnection of paleo-river systems within relatively recent geological time, and subsequently differentiated in several areas. Because of its genetic characteristics, the three regions are important for conservation of the subspecies’ genetic diversity.

著者

清水 孝昭

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.36-40, 2014-04-25 (Released:2016-05-22)

参考文献数

61

著者

片野 修 馬場 吉弘 大原 均 河村 功一 佐藤 正人 熊谷 雅之 竹内 基 伊藤 正一 富樫 繁春 井上 信夫

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.2, pp.97-103, 2014-11-05 (Released:2016-12-25)

参考文献数

28

被引用文献数

2

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The distribution of Nipponocypris temminckii was investigated in 24 rivers in Nagano, Niigata, Yamagata, Akita, Iwate, and Aomori Prefectures, the species being collected at seven study sites. Amongst non-benthic fishes, N. temminckii was exclusively dominant in two rivers. Supplementary records of the species in Nagano, Niigata, Akita and Iwate Prefectures were also described. Rivers in which investigations had been conducted over two or three years showed an increasing proportion of N. temminckii, indicating successful colonization of the species.