Papers Published in Japanese Journal of Ichthyology
Vol. 66, No. 2, November 5, 2019
CONTENTS
Original Papers
Records of three anthiadine species, Plectranthias longimanus, P. nanus, and P.
winniensis, from Japanese waters, with morphological and genetic comparisons(Perciformes: Serranidae)
Yoshito Kawaji, Hiroshi Senou, Nozomu Muto and Hiroyuki Motomura
First record of Onigocia grandisquama (Scorpaeniformes: Platycephalidae) from Japan
Hisashi Imamura and Gento ShinoharaLife history traits of Mugilogobius sp. and M. chulae on southern Okinawa-jima Island,
Japan
Taiga Kunishima and Katsunori Tachihara
Detection of endangered Itasenpara bitterling using simple environmental DNA analysis
Yuji Yamazaki and Masaki Nishio
First Japanese record of Trachinotus anak (Perciformes: Carangidae) from Kagoshima
Prefecture, Japan
Hidetoshi Wada, Masahide Itou and Hiroyuki Motomura
Distribution of anadromous red-spotted masu salmon Oncorhynchus masou ishikawaefrom 1927 to 1931 evaluated from data published in “River Fishery” by the Fisheries
Agency, Ministry of Agriculture and Forestry, Japan
Daisuke Kishi and Tetsuya Tokuhara
Genetic population structure and disturbance among Coreoperca kawamebari(Perciformes, Sinipercidae) populations in Tokushima Prefecture
Takaaki Shimizu, Yoichi Sato and Motohiro Takagi

Notes
New record of Parascombrops mochizukii from Suruga Bay; the northernmost record of
the species

Naohide Nakayama, Munehiro Takami and Taku Horie
Density and body size of wild chum salmon Oncorhynchus keta fry in the lower reaches
of a small stream on the Sanriku coast, northern Honshu, Japan
Tsuyoshi Tamate, Ken-ichi Ohmoto, Kei Sasaki and Miwa Yatsuya
A rare serranid fish, Suttonia coccinea (Teleostei: Perciformes), from Ishigaki-jimaisland, Yaeyama Islands, southern Japan
Tomohiro Yoshida, Kiyoshi Hagiwara and Hiroyuki Motomura
Behavioral and morphological comparisons of newly emerged white-spotted char,
Salvelinus leucomaenis, in two tributaries of the Kame River, southern Hokkaido,
Japan
Hiroyuki Yamada, Takashi Enomoto and Satoshi Wada
Review of Japanese records of Chelidoperca margaritifera Weber, 1913 (Serranidae);misidentifications of C. santosi Williams and Carpenter, 2015 and C. tosaensis
Matsunuma, Yamakawa and Williams, 2017
Mizuki Matsunuma, Takeshi Yamakawa and Kazuo Hoshino
Spawning of Gnathopogon caerulescens, Carassius buergeri grandoculis, and JapaneseCyprinus species in a revetmented tributary of the Chounogi River flowing into Lake
Biwa, as revealed by DNA identification of field-collected eggs
Kohji Mabuchi, Kazuya Nishida and Makoto A. Yoshida
Records of Brama orcini and Eumegistus illustris (Bramidae) from the Sea of Japan
Akari Ogino, Fumihito Tashiro and Mizuki Matsunuma
First record of Scomberoides commersonnianus (Perciformes: Carangidae) from
Yamaguchi Prefecture, Japan and a checklist of carangid fishes from Wakasa Bay
and adjacent waters
Mizuki Matsunuma, Yoshitaka Uchida and Fumihito Tashiro
Group structure and home range of the cleaner wrasse Labroides dimidiatus in
Tateyama Bay, Chiba, Japan
Shuta Endo, Sayo Tomatsu and Tomoki Sunobe

Original Papers
Japanese Journal of Ichthyology
Vol. 66, No. 2, pp. 137–154
Records of three anthiadine species, Plectranthias longimanus, P. nanus, and P.
winniensis, from Japanese waters, with morphological and genetic comparisons(Perciformes: Serranidae)
Yoshito Kawaji, Hiroshi Senou, Nozomu Muto and Hiroyuki Motomura*
Abstract A comparison of 68 specimens of Plectranthias (Serranidae: Anthiadinae) fromJapanese waters with 85 Indo-Pacific specimens, all characterized by the fourth dorsal-fin
spine longest, no branched pectoral-fin rays, two antrorse spines on the lower preopercularmargin, the lateral line incomplete with fewer than 22 pored scales, and scales absent from themaxilla, revealed the former to include P. longimanus (Weber, 1913) [23 specimens, 8.5–28.4mm standard length (SL)], P. nanus Randall, 1980 (38, 10.6–32.3 mm SL), and P. winniensis(Tyler, 1966) (7, 24.1–38.6 mm SL). Among the Japanese specimens, P. longimanus was
similar to P. nanus in overall body appearance, but differed from the latter in having modally
12 pectoral-fin rays [vs. 13 in P. nanus], 15 gill rakers (vs. 17), 14 pored lateral-line scales (vs.
18), 26 or 27 scale rows in the longitudinal series (vs. 28), 8 scale rows below the lateral line(vs. 9), 3 interopercular spines (vs. spines absent), and 2 or 3 subopercular spines (vs. spines
absent), a maximum body depth 34.1% (mean) of SL (vs. 28.6%), and a vertical band absent
near the base of the caudal fin (vs. band present in both fresh and preserved specimens).
Japanese P. winniensis clearly differed from the other two species, having 16 or 17 soft rays
in both the dorsal and pectoral fins (vs. fewer than 15 rays in the latter two species), modally
16 pored lateral-line scales (vs. 14 in P. longimanus, 18 in P. nanus), subopercular spine
absent (vs. 1–4 present in P. longimanus), and a greenishred body without dark blotches orbands (vs. reddish-brown body, mottled with dark blotches and bands). In addition, analysesof 12S ribosomal RNA and cytochrome c oxidase subunit I gene sequences indicated that thethree species were genetically distinct from each other. In Japanese waters, P. longimanus has
been recorded from the Izu Peninsula and the Izu Islands to the Koshiki Islands, mainland
Kagoshima, and the Ryukyu Islands, P. winniensis having a similar distribution pattern, i.e.,from the Izu Islands south to the Ryukyu Islands. Plectranthias nanus has been recorded only
from island groups, including the Ogasawara, Ryukyu, and Daito islands.
(*Corresponding author: the Kagoshima University Museum, 1–21–30 Korimoto,Kagoshima 890–0065, Japan; e-mail: motomura@kaum.kagoshima-u.ac.jp)
Japanese Journal of Ichthyology
Vol. 66, No. 2, pp. 155–160
First record of Onigocia grandisquama (Scorpaeniformes: Platycephalidae) from Japan
Hisashi Imamura* and Gento Shinohara
Abstract
The platycephalid genus Onigocia Jordan and Thompson, 1913, defined by, e.g.
pored lateral line scales numbering about 40 or fewer and the infraorbital ridge finely serrated,presently includes the following nine valid species at present: Onigocia bimaculata Knapp,
Imamura and Sakashita, 2000, Onigocia grandisquama (Regan, 1908), Onigocia
macrocephala (Weber, 1913), Onigocia macrolepis (Bleeker, 1854), Onigocia
oligolepis (Regan, 1908), Onigocia lacrimalis Imamura and Knapp, 2009, Onigocia
pedimacula (Regan, 1908), Onigocia sibogae Imamura, 2011 and Onigocia
spinosa (Temmink and Schlegel, 1843). Of them, only O. bimaculata, O. macrolepis and O.
spinosa have been formally recorded from Japanese waters. However, a single specimenof Onigocia [70.6 mm in standard length (SL)] collected from Mugi-oshima Island,
Tokushima Prefecture, Japan in 1994, was recently found to be identical with O.
grandisquama, being characterized by I + VII-11 dorsal-fin rays, 11 anal-fin rays, 12
pectoral-fin rays, 10 caudal-fin rays, 34 pored lateral-line scales, no small spines on thelachrymal ridges, 2 preocular spines, 9 pterotic spines, a single ocular flap not attaining to theposterior margin of the orbit, small papillae absent on the eye, the upper iris lappet short andbranched, a notch absent on the suborbital ridge below the eye and interopercular flap, and ahead length 48.6% SL. Although the latter has been widely recorded in the Indo-West Pacific,
it has not been previously reported from Japanese waters; thus, the specimen represents thefirst record of O. grandisquama from Japan, as well as the northernmost record of the species.
The Japanese specimen is described in full and a new Japanese standard name(Nameraonigochi) is proposed for the species.
(*Corresponding author: Faculty of Fisheries Sciences, Hokkaido University, 3–1–1
Minato-cho, Hakodate, Hokkaido 041–8611, Japan; e-mail: imamura@fish.hokudai.ac.jp)
Japanese Journal of Ichthyology
Vol. 66, No. 2, pp. 161–170
Life history traits of Mugilogobius sp. and M. chulae on southern Okinawa-jima Island,
Japan
Taiga Kunishima* and Katsunori Tachihara
Abstract The species of Mugilogobius sp. (Japanese name: Izumi-haze) and M. chulae areboth common species, sympatrically inhabiting the estuaries and tidal flats of Okinawajima
Island. Some species of Mugilogobius has a urea cycle, and their processing ability is higher,
especially in northern distributed species, such as M. abei and Mugilogobius sp. It is possible
to differentiate their life history traits and habitats on the basis of urea processing ability.
However, because little is known in detail of their life history and habitat, Mugilogobius sp.
and M. chulae were investigated through monthly sampling conducted on the southern part of
the Sashiki Tidal flat and Manko Wetland on Okinawa-jima Island, from January 2012 toJanuary 2013. The spawning seasons of Mugilogobius sp. and M. chulae are from January to
October and April to October, respectively, with peaks in the summer period (April to
October), indicating that maturity in both species is closely related to changes in watertemperature. A comparison with the spawning season of M. abei, a temperate region species,
revealed the subtropical species to spawn over a longer period. Estimates of daily age fromotolith analyses indicated the possibility of recruitment from other areas, since histologicalobservations revealed mismatches of gonads and birthmonths between different spawningseasons, as estimated by back-calculations of daily age. The longevity of Mugilogobius
species was about six months. The study also revealed the growth rate of Mugilogobius sp. tobe similar to that of M. chulae. Mugilogobius chulae locally inhabited mangrove habitats,whereas Mugilogobius sp. showed wide habitat use and was less susceptible to decreasing
habitat than the former. Accordingly, future conservation of M. chulae is dependent uponsuitable mud habitat associated with mangroves.
(*Corresponding author: Wakayama Prefectural Museum of Natural History, 370–1 Funo,
Kainan, Wakayama 642–0001, Japan; e-mail: taigakunishima@gmail.com)
Japanese Journal of Ichthyology
Vol. 66, No. 2, pp. 171–179
Detection of endangered Itasenpara bitterling using simple environmental DNA analysis
Yuji Yamazaki* and Masaki Nishio
Abstract
Environmental DNA (eDNA - genetic material released from an organism into
the environment, such as water), which has recently gained attention as a new area of study,
has applications in confirming the presence and estimating the biomass of target species,
especially endangered fishes, as well as aiding an understanding of the general fish fauna.
However, eDNA analysis requires expensive equipment and reagents, and is presently
subjected to restrictions on widespread use, especially for environmental education and publicawareness. For future conservation studies of the endangered Itasenpara bitterling
Acheilognathus longipinnis, and subsequent application to other species, a species-specific
PCR amplification and simple method of eDNA analysis was developed. Species-specificprimer pairs based on nucleotide sequences were designed for the Itasenpara bitterling andclosely related species. These enabled Itasenpara bitterling-specific amplification in PCR
experiments on DNA samples obtained from fin tissues. Subsequently, species-specificamplification of eDNA samples obtained from a watershed containing Itasenpara bitterling
habitat was confirmed using a simple PCR-based experimental method, although theamplification ratio varied, probably due to habitat conditions and bitterling growth stage.
(*Corresponding author: Graduate School of Science and Engineering for Research,
University of Toyama, 3190 Gofuku, Toyama 930–8555, Japan; e-mail:yatsume@sci.utoyama.ac.jp)
Japanese Journal of Ichthyology
Vol. 66, No. 2, pp. 181–186
First Japanese record of Trachinotus anak (Perciformes: Carangidae) from Kagoshima
Prefecture, Japan
Hidetoshi Wada*, Masahide Itou and Hiroyuki Motomura
Abstract
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 Trachinotus anak Ogilby, 1909, having the following combinationof 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; anarrow band of villiform teeth on lower jaw; teeth on tongue absent; supraoccipital bone thinand 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 lateralbody surface; and anal-fin lobe yellow, the anterior margin lacking brownish coloration.
Because of the superficial similarity of T. anak to T. mookalee Cuvier, 1832, differentiation
between the species sometimes requiring dissection, previous Japanese records of T.
mookalee were re-examined. Trachinotus mookalee was confirmed as occurring in Japanesewaters, but is known only from a single specimen from Miyazaki Prefecture, east coast of
Kyushu, southern Japan. Trachinotus anak was previously known only from Taiwan, northernand eastern Australia, and New Caledonia, the present specimen from Kagoshima
representing the first record from Japan and northernmost record for the species. The newstandard Japanese name “Yokozunamarukoban” is herein proposed for the species.
(*Corresponding author: The United Graduate School of Agricultural Sciences, Kagoshima
University, 1–21–24 Krimoto, Kagoshima 890–0065, Japan; e-mail: gd120300@gmail.com)
Japanese Journal of Ichthyology
Vol. 66, No. 2, pp. 187–194
Distribution of anadromous red-spotted masu salmon Oncorhynchus masou ishikawaefrom 1927 to 1931 evaluated from data published in “River Fishery” by the Fisheries
Agency, Ministry of Agriculture and Forestry, Japan
Daisuke Kishi* and Tetsuya Tokuhara
Abstract
Distribution of the anadromous red-spotted masu salmon, Oncorhynchus masou
ishikawae in Japan was evaluated from data published in “River Fishery, vol. 1–6” between
1930 and 1934 and in 1937 by the Fisheries Agency, Ministry of Agriculture and Forestry,
Japan. Catches of salmon were recorded in 26 rivers from Shizuoka to Yamaguchi Prefectureon Honshu Island and 5 rivers in Tokushima and Kochi Prefectures on Shikoku Island, but nodistribution was indicated in rivers in Fukuoka and Oita Prefectures on Kyushu Island
between 1927 and 1931. The best-fitted model of Generalized Liner Model indicated that bothof latitude and river length had significant positive effects on the presence of salmon. Salmon
is possibly distributed only in large rivers, particularly in the southern region. Probability of
distribution of salmon as correct classification in 64 rivers and misclassification in 15 rivers
including the Shimanto River in southwestern Shikoku Island were calculated from thebest-fitted model. Catch of salmon was not recorded in data published by the Fisheries
Agency, but that published in 1912 by the local government in Hata, Kochi Prefecture, andour analysis indicated salmon presence in the Shimanto River. Although the Nahari River (theriver mouth, 33˚25'21″N, 134˚0'42″E) in southeastern Shikoku Island had been shown to be
the southern limit in data published by the Fisheries Agency, we suggested the Shimanto
River (32˚55'58″N, 132˚59'39″E) the southernmost limit. In this study, we reveal previous

distribution of the anadromous red-spotted masu salmon in 26 rivers in Honshu Island and 6
rivers including the Shimanto River, in Shikoku Island in Japan.
(*Corresponding author: Gero Branch, Gifu Prefectural Research Institute for Fisheries andAquatic Environments, 2605–1 Hane, Hagiwara, Gero, Gifu 509–2592, Japan; e-mail:kishi-daisuke@pref.gifu.lg.jp)
Japanese Journal of Ichthyology
Vol. 66, No. 2, pp. 195–203
Genetic population structure and disturbance among Coreoperca kawamebari(Perciformes, Sinipercidae) populations in Tokushima Prefecture
Takaaki Shimizu, Yoichi Sato and Motohiro Takagi*
Abstract
Genetic structure and disturbance among populations of the Japanese perch
Coreoperca kawamebari in Tokushima Prefecture were surveyed by mitochondrial DNA(mtDNA) direct sequence analysis. Two sample series were taken during different sampling
periods from three river systems (Kuwano, Fukui, and Tsubaki River systems): (1) 1999,
samples from river populations free of any officially sanctioned artificial introduction ofseeds; and (2) 2011–14, samples from the Tsubaki River population previously subjected toartificial introduction of seeds from the Kuwano River population. In the 1999 samples, perchin the above three river systems all exhibited the Tokushima clade (comprising haplotypes
Hap 1 and Hap 2). Hap 1 was shared by the Fukui and Tsubaki River systems, whereas Hap 2
was endemic to the Kuwano River system. A few cases of an additional haplotype (Hap 10),included in a different clade (Western Setouchi clade), were found in the Fukui River
population. In the 2011–14 samples, Hap 2 of the Kuwano River endemic haplotype wasshared with Tsubaki River populations, at rates from 25% to 56% among individuals ofdifferent year classes, suggesting mtDNA intrusion from the Kuwano River population.
Additionally, all individuals in a tributary of the Kuwano River system (a recently discovered
habitat of the species), exhibited a haplotype (Hap 11) belonging to the Western Setouchi
clade. These findings suggest artificial intraspecific introductions among river populations,
resulting in serious irreversible disturbance to the natural perch populations. Further detailed
nuclear DNA surveillance should be conducted to clarify the ongoing status of the perch.
(*Corresponding author: South Ehime Fisheries Research Center, Ehime University, 1289–
1 Funakoshi, Ainan, Ehime 798–4292, Japan; e-mail: takagi.motohiro.mc@ehime-u.ac.jp)

Notes
Japanese Journal of Ichthyology
Vol. 66, No. 2, pp. 205–210
New record of Parascombrops mochizukii from Suruga Bay; the northernmost record of
the species
Naohide Nakayama*, Munehiro Takami and Taku HorieAbstract
A single specimen of the acropomatid fish Parascombrops mochizukii
Schwarzhans, Prokofiev and Ho, 2017, collected from 346 m in Suruga Bay, west coast of Izu
Peninsula, Japan represents the northernmost record of the species, previously known only
from the northern South China Sea and off Owase, Mie Prefecture, southern Japan. The
Suruga Bay specimen is described, including previously unknown color features. Diagnostic
characters separating the species from similar congeners are also discussed.
(*Corresponding author: Department of Marine Biology, School of Marine Science andTechnology, Tokai University, 3–20–1 Orido, Shimizu, Shizuoka 424–8610, Japan; e-mail:gadiformes@gmail.com)
Japanese Journal of Ichthyology
Vol. 66, No. 2, pp. 211–216
Density and body size of wild chum salmon Oncorhynchus keta fry in the lower reaches
of a small stream on the Sanriku coast, northern Honshu, Japan
Tsuyoshi Tamate*, Ken-ichi Ohmoto, Kei Sasaki and Miwa Yatsuya
Abstract The density and body size of wild chum salmon Oncorhynchus keta fry weresurveyed in spring each year from 2012–2015 inclusive, immediately above the mouth of
the Otobe River, a small stream on the Sanriku coast, northern Honshu Island. In eachsurvey year, fry density peaked in late April or early May, typically exhibiting a sharp
decrease afterwards. Mean fork length generally ranged between 42–47 mm, the observed
minimum and maximum lengths during the survey being 34 mm and 83 mm, respectively.
(*Corresponding author: Shibetsu Salmon Museum, Shibetsu, Hokkaido 086–1631, Japan;
e-mail: yamabemasu@yahoo.co.jp)
Japanese Journal of Ichthyology
Vol. 66, No. 2, pp. 217–219
A rare serranid fish, Suttonia coccinea (Teleostei: Perciformes), from Ishigaki-jimaisland, Yaeyama Islands, southern Japan
Tomohiro Yoshida*, Kiyoshi Hagiwara and Hiroyuki Motomura
Abstract
A single specimen (43.8 mm standard length) of Suttonia coccinea Endo andKenmotsu, 2013 (Perciformes: Serranidae), previously known only from the holotype from
Okino-shima island, Kochi Prefecture, was located in the Yokosuka City Museum collection,
having been collected from Ishigaki-jima island, Yaeyama Islands, Japan on 4 July 2000. The
specimen represents only the second known record of S. coccinea.
(*Corresponding author: Seikai National Fisheries Research Institute, Japan Fisheries
Research and Education Agency, Taira-machi, Nagasaki 851–2213, Japan; e-mail:k5299534@kadai.jp)
Japanese Journal of Ichthyology
Vol. 66, No. 2, pp. 221–225

Behavioral and morphological comparisons of newly emerged white-spotted char,
Salvelinus leucomaenis, in two tributaries of the Kame River, southern Hokkaido, Japan
Hiroyuki Yamada*, Takashi Enomoto and Satoshi Wada
Abstract Many local populations of white–spotted char (Salvelinus leucomaenis), a
widespread Far East Asian species, persist in above–dam areas, even when erosion control
dams prevent continuing upstream movement of individuals. Four morphological characters(dorsal fin height, body depth, caudal peduncle depth, and eye diameter) and two behavioral
traits (settlement time and number of foraging actions) of S. leucomaenis fry were compared
between two tributaries, one above an erosion control dam and the other an unrestricted
stream. Dorsal fin height and caudal peduncle depth were smaller, and settlement time during
daytime longer in the above–dam fry, which also showed less frequent foraging behavior thanunrestricted stream fry during nighttime, suggesting that the former had unsuitable
morphology for swimming and a lower wondering tendency. These characteristics may
ultimately aid survival of the above–dam population.
(*Corresponding author: Graduate School of Fisheries Science, Hokkaido University, Minato,
Hakodate, Hokkaido 041–8611, Japan; e-mail: amenouo107@eis.hokudai.ac.jp)
Japanese Journal of Ichthyology
Vol. 66, No. 2, pp. 227–236
Review of Japanese records of Chelidoperca margaritifera Weber, 1913 (Serranidae);misidentifications of C. santosi Williams and Carpenter, 2015 and C. tosaensis
Matsunuma, Yamakawa and Williams, 2017
Mizuki Matsunuma*, Takeshi Yamakawa and Kazuo Hoshino
Abstract Previous Japanese records of Chelidoperca margaritifera Weber, 1913
(Perciformes: Serranidae) were reviewed, and all available Japanese specimens previously
reported as that species found to be either C. santosi Williams and Carpenter, 2015 or C.
tosaensis Matsunuma, Yamakawa and Williams, 2017. No evidence was found of C.
margaritifera occurring in Japanese waters, the species instead being known solely from theholotype, collected off New Guinea. Chelidoperca santosi is characterized by three scale rows
between the lateral line and middle of the spinous dorsal-fin base; two pairs of dark spots on
the snout; a pair of dark spots on the lower jaw tip; the interorbital scales just reaching or
extending slightly beyond mid-orbit but not reaching level with the posterior nasal pores;
scales on the mandibular ventral surface extending anteriorly onto the dentary; and enlarged
canine-like teeth on both jaws, thereby being distinguished from all Japanese congeners [C.
hirundinacea (Valenciennes in Cuvier and Valenciennes, 1831), C. pleurospilus (Günther,
1880) and C. tosaensis]. The standard Japanese name “Minamihimekodai” should be applied
to C. santosi.(*Corresponding author: Department of Environmental Management, Faculty ofAgriculture, Kindai University, 3327–204 Nakamachi, Nara 631–8505, Japan;
e-mail:matsunuma@nara.kindai.ac.jp)
Japanese Journal of Ichthyology

Vol. 66, No. 2, pp. 237–243
Spawning of Gnathopogon caerulescens, Carassius buergeri grandoculis, and JapaneseCyprinus species in a revetmented tributary of the Chounogi River flowing into Lake
Biwa, as revealed by DNA identification of field-collected eggs
Kohji Mabuchi*, Kazuya Nishida and Makoto A. Yoshida
Abstract 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 thecollected 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.
(*Corresponding author: NIES Lake Biwa Branch Office, National Institute forEnvironmental Studies, 5–34 Yanagasaki, Otsu, Shiga 520–0022, Japan; e-mail: mabuchi.
koji@nies.go.jp)
Japanese Journal of Ichthyology
Vol. 66, No. 2, pp. 245–252
Records of Brama orcini and Eumegistus illustris (Bramidae) from the Sea of Japan
Akari Ogino, Fumihito Tashiro and Mizuki Matsunuma*
Abstract Two specimens [157.5–269.1 mm standard length (SL)] of Bigtooth Pomfret,Brama orcini Cuvier, 1831 (Bramidae), collected from Kyoto Prefecture (Sea of Japan coast),
Japan, represent the northernmost record of the species, which had not previously beenrecorded from the Japan Sea coast. In addition, two examples of Brilliant Pomfret,
Eumegistus illustris Jordan and Jordan, 1922 (350.0 and 378.0 mm SL), also collected fromthe Japan Sea coast of Kyoto Prefecture, similarly represent the northernmost records for the
species.
(*Corresponding author: Department of Environmental Management, Faculty of Agriculture,
Kindai University, 3327–204 Nakamachi, Nara 631–8505, Japan;
e-mail:matsunuma@nara.kindai.ac.jp)
Japanese Journal of Ichthyology
Vol. 66, No. 2, pp. 253–260
First record of Scomberoides commersonnianus (Perciformes: Carangidae) from
Yamaguchi Prefecture, Japan and a checklist of carangid fishes from Wakasa Bay andadjacent waters
Mizuki Matsunuma*, Yoshitaka Uchida and Fumihito Tashiro

Abstract 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 thefourth 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.
(*Corresponding author: Department of Environmental Management, Faculty ofAgriculture, Kindai University, 3327–204 Nakamachi, Nara 631–8505, Japan;
e-mail:matsunuma@nara.kindai.ac.jp)
Japanese Journal of Ichthyology
Vol. 66, No. 2, pp. 261–267
Group structure and home range of the cleaner wrasse Labroides dimidiatus in
Tateyama Bay, Chiba, Japan
Shuta Endo, Sayo Tomatsu and Tomoki Sunobe*
Abstract Group structure and cleaning behavior of the cleaner wrasse Labroides dimidiatus
were studied in Tateyama Bay, Chiba, Japan. Two males and four females on a rocky reef,
and one male and five females on an artificial reef were confirmed as haremic groups. The
home ranges of the former were extensive and those of the latter relatively narrow. The hostspecies, which were cleaned by L. dimidiatus, were widely distributed over the rocky reef, but,
restricted to a limited area on the artificial reef, indicating that the home range sizes of thecleaner wrasse may be determined by the distribution of the host species.
(*Corresponding author: Laboratory of Fish Behavioral Ecology, Tateyama Station, Field
Science Center, Tokyo University of Marine Science and Technology, 670 Banda, Tateyama
294-0308, Japan; e-mail: sunobe@biscuit.ocn.ne.jp)