著者

藤原 恭司 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

vol.64, no.2, pp.107-112, 2017-11-25 (Released:2018-06-19)

参考文献数

14

被引用文献数

3

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A single female specimen (256.4 mm standard length) of Acanthopagrus taiwanensis Iwatsuki and Carpenter, 2006, collected off Kasasa, Minami-satsuma, Kagoshima Prefecture, Japan, was characterized by the following combination of characters: 3½ scale rows between fifth dorsal-fin spine base and lateral line; 3 or 4 oblique scale rows on cheek; modally 15 total gill rakers; 3 or 4 rows of flattened molars on each side of upper and lower jaws; second anal-fin spine robust, bluntly pointed; ventral edge of infraorbitals above maxilla nearly straight; anterior edge of dorsal scaly area of head rounded; no black bars on head; a dark streak on each membrane of anal fin; and anal-fin soft rays whitish. The dorsal- head profile of the Japanese specimen was relatively straight, compared with the convex profile in the type specimens of the species. Other characters of the Japanese specimen, however, agreed well with those of A. taiwanensis given in the original description. Acanthopagrus taiwanensis is very similar to A. pacificus Iwatsuki, Kume and Yoshino, 2010, but can be distinguished from the latter by having 3 or 4 oblique scale rows on the cheek (vs. 6 or 7 in the latter), modally 15 total gill rakers (vs. 17), flattened molar teeth on each side of the upper and lower jaws (vs. rounded molariform teeth), a robust, relatively bluntly pointed second anal-fin spine (vs. acutely pointed), and whitish anal-fin soft rays (vs. blackish). Acanthopagrus taiwanensis has been previously recorded only from Taiwan, the Kagoshima specimen representing the first record from Japan and northernmost record for the species. The new standard Japanese name “Iwatsukikurodai” is proposed for the species and distributional implications of A. taiwanensis in Japanese waters discussed.

著者

生駒 歩 戸田 竜哉 長崎 哲新 河村 功一

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

vol.69, no.1, pp.7-20, 2022-04-25 (Released:2022-05-06)

参考文献数

59

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Genetic characteristics of the Japanese torrent catfish Liobagrus reinii in the Miya River and neighboring drainages were investigated, using mtDNA and eight microsatellite (MS) markers, to evaluate the effects of man-made river structures on the distribution and genetic structure of the species. A total of 23 mtDNA haplotypes were detected, forming a star-like haplotype network, in which the population in the upper reaches (URM) formed a unique group. Many populations in tributaries of the middlelower reaches (MLRM) included unique haplotypes, although they shared a common haplotype located at the center of the network. MS markers indicated that genetic diversity tended to decrease upstream in the tributaries, coupled with a decline in effective population size and the existence of genetic bottlenecks. These phenomena were especially evident in tributaries isolated with weirs or dams. The fixation index RST, the values of which were smaller than FST, indicated isolation by distance (Mantel test), genetic differentiation among populations having occurred in recent years. Although a Bayesian-based assignment test showed unique clusters in the populations of isolated tributaries, including the URM population, many MLRM populations shared an admixture of multiple clusters, probably resulting from the dispersal of L. reinii. These results indicated that L. reinii in the Miya River included two conservation units, in the upper and middle-lower reaches, respectively. Man-made river structures seem to have caused fragmentation of the distribution of the species, resulting in small tributary populations suffering from genetic deterioration. In drainages neighboring the Miya River, the Isezi River population of L. reinii seems to be indigenous, owing to unique genetic characteristics in mtDNA and MS, whereas the sharing of genetic characteristics with the URM population of the Miya River indicated that the Akaba River population is likely to have been introduced from the Miyagawa Reservoir.

著者

大橋 慎平 今村 央 矢部 衞

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.60, no.2, pp.111-116, 2013-11-05 (Released:2015-12-26)

参考文献数

23

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Two specimens (131.5 and 147.0 mm in standard length) of the Gelatinous Blindfish Aphyonus gelatinosus Günther, 1878, collected from southern Japan (Kumano Sea and near the Tori Island, part of the Izu Island chain), were found among preserved specimens held by the Department of Natural Science, Faculty of Science, Kochi University, Kochi, Japan and National Museum of Nature and Science, Tsukuba, Japan. Aphyonus gelatinosus is recognizable in having only a single pelvic fin ray, high numbers of dorsal fin rays (92–118) and caudal vertebrae (46–55), few long gill rakers (3–4), and short predorsal length (26.5–30.5% SL). This species and genus is known from the Pacific Ocean, but not from the north Pacific including Japanese waters. Thus, these specimens are a new record of both the genus Aphyonus and A. gelatinosus for Japan.

著者

Gerald R. Allen

出版者

The Ichthyological Society of Japan

雑誌

魚類学雑誌 (ISSN:00215090)

巻号頁・発行日

vol.33, no.4, pp.409, 1987-02-20 (Released:2010-06-28)

参考文献数

4

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Allen (1980) がPseudomugtl furcatusを模式種として作ったPopondetta属は, Woodward (1978) が作った半翅類のPopondetta属に先取されていたので, 置換名としてPopondichthysを提唱する.

著者

木戸 芳

出版者

The Ichthyological Society of Japan

雑誌

魚類学雑誌 (ISSN:00215090)

巻号頁・発行日

vol.31, no.1, pp.83-85, 1984

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北海道網走沖のオホーツク海から, ダンゴウオ科のヒゲダンゴ<I>Eumicrotremus barbatus</I>が1個体得られた.本種はこれまで, アリューシャン列島のIgitkin島沿岸および千島列島のParamushir島沖から, それぞれ1個体ずつが知られているにすぎず, 本標本は第三番目の記録であり, また日本初記録である.<BR>本種の特徴として, 体のほぼ全域に皮質突起が分布することがあげられていたが, 本標本では願, 第1背鰭および尾部にのみ認められた, この相違は個体変異と考えられる, しかしながら, 少なくとも皮質突起が存在すること, .第1背鰭が高いこと, 鼻孔および鯉蓋から下顎にかけての感覚孔は管状で, それらが非常に長いこと, また両眼間隔域に骨質瘤状突起を欠くことにより, 本種はイボダンゴ属の他種と容易に区別される.

著者

向井 貴彦 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

vol.57, no.1, pp.75-76, 2010 (Released:2014-03-05)

参考文献数

7

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

2022

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<p>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 (<i>Chelon macrolepis</i>, <i>Crenimugil crenilabis</i>, <i>Ellochelon vaigiensis</i>, <i>Mugil cephalus</i>, <i>Oedalechilus labiosus</i>) and four mugilid species (<i>Ch. macrolepis</i>, <i>Cr. crenilabis</i>, <i>Neomyxus leuciscus</i>, <i>O. labiosus</i>) being collected from the respective islands. In addition, a specimen of <i>Moolgarda seheli</i> 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.</p>

著者

北村 淳一

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

vol.58, no.2, pp.195-198, 2011 (Released:2014-03-07)

参考文献数

10

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Freshwater mussel (family Unionidae) utilization for oviposition by Sarcocheilichthys variegatus variegatus was investigated in a drainage ditch and the Harai River. Twenty five freshwater mussels in Pronodularia japanensis (4% of 616 individuals examined) in a drainage ditch connected to the Kushida River hosted S. v. variegatus eggs, compared with none of two other freshwater mussel species, Inversidens brandti and Unio douglasiae douglasiae. In the Harai River, eight freshwater mussels (3 I. brandti, 2 Obovalis omiensis, 1 Lanceolaria grayana and 1 Anodonta spp.) (2.7% of 290 individuals examined) hosted S. v. variegatus eggs, compared with none of P. japanensis and U. d. douglasiae. Among the available freshwater mussel species, U. d. douglasiae may be only one selected against for oviposition by S. v. variegates.

著者

佐藤 行人 西田 睦

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.56, no.2, pp.89-109, 2009 (Released:2014-03-05)

参考文献数

151

被引用文献数

1

著者

松浦 啓一 戸田 実

出版者

The Ichthyological Society of Japan

雑誌

魚類学雑誌 (ISSN:00215090)

巻号頁・発行日

vol.28, no.1, pp.91-93, 1981

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本邦初記録のケショウフグ (新称) <I>Arothron mappa</I>とワモンフグ (新称) <I>A.reticularis</I>が沖縄本島から採集された.<BR>ケショウフグは, 腹側面に一大黒斑を有すること, 体の背方に虫食い状の暗褐色模様を有することで他のモヨウフグ属の種類と容易に識別できる.ワモンフグは, サザナミフグ<I>A.hispidus</I>に似ているが, 眼の周囲に環状の白色線があること, 体の背面と側面に多数の白色縦線をもつことで識別される.<BR>Beaufort in Beaufort and Briggs (1962) は, ワモンフグの尾柄長が尾柄高より小さく, サザナミフグでは逆に尾柄長が尾柄高より大きいと報告している.しかし翁今回得られたワモンフグの尾柄長は明らかに尾柄高より大きく, これらの部位の関係には種内変異があることを示唆した.

著者

藤田 朝彦 大浜 秀規 細谷 和海

出版者

The Ichthyological Society of Japan

雑誌

魚類学雑誌 (ISSN:00215090)

巻号頁・発行日

vol.52, no.1, pp.21-26, 2005-05-25 (Released:2010-06-28)

参考文献数

19

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Phoxinus lagowskii yamamotis is a small dace-like cyprinid, endemic to Lakes Yamanaka and Motosu at the northern base of Mt. Fuji. The fish was categorized as Data Deficient (DD) in the Japanese Red Data Book (2nd edition). Morphological comparisons between the type series of “Moroco yamamotis” and syntypes of “P.steindachneri” revealed a distinction in caudal peduncle height, the former showing extreme values, lower than for other individuals from same river basin and adjacent rivers. Phoxinus lagowskii yamamotis may have been a lacustrine population from which an ancestoral population of P.lagowskii steindachneri evolved following adaptations to a lentic environment. Several specimens were collected from an outlet of L. Yamanaka. A relationship between these specimens and the lacustrine “M.yamamotis” group is suggested, the assemblage being in need of conservation as an evolutionarily significant unit.

著者

藤田 清

出版者

The Ichthyological Society of Japan

雑誌

魚類学雑誌 (ISSN:00215090)

巻号頁・発行日

vol.43, no.1, pp.27-30, 1996-05-31 (Released:2010-06-28)

参考文献数

6

被引用文献数

1

著者

小枝 圭太

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.21-032, (Released:2022-01-28)

参考文献数

51

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A single adult specimen (205.1 mm standard length) of Lined Butterflyfish, Chaetodon lineolatus Cuvier, 1831, collected in 1932 from Onahama, Fukushima Prefecture, northern Japan, was discovered in the fish collection of the Department of Zoology, the University Museum, the University of Tokyo. The previous northernmost Japanese record of the species being the Boso Peninsula, Chiba Prefecture, most records from southern Japan have been of juveniles. Accordingly, the present specimen represents the first record of the species from the cold-water area off northern Japan (northernmost record of the species), and indicates that at least limited dispersal of tropical fishes to northern Japan occurred in the 1930’s, when water temperatures were estimated to have been almost 2˚C lower than in recent years.

著者

藤田 矢郎

出版者

The Ichthyological Society of Japan

雑誌

魚類学雑誌 (ISSN:00215090)

巻号頁・発行日

vol.13, no.4, pp.162-168, 1966

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1965年6月22日, 長崎市郊外の野母崎沖でサバフグの入工授精を行い, ふ化仔魚を約1か月間飼育し, 卵発生およびふ化仔魚について次の結果を得た。<BR>1. サバフグの卵は無数の小油球からなる油球塊を有する無色透明な球形の沈性卵で, かろうじて認められる程度の微弱な粘着性があり, 卵径0.61-0.70mm, 平均0.65mmである。<BR>2. 水温21.7-24.5℃で, 授精後67時間でふ化する。本種の卵発生においては, 発生後期・に油球の癒合が行われ, ふ化直前には大油球2-3個と小油球1-2個になるが, これは他のフグ類 (Fugu属およびSphoeroides属) の卵発生にはみられない特異な現象である。<BR>3. ふ化直後の仔魚は全長1.91mm, 筋節数8+13=21で, 卵黄は細長い楕円形で, 大油球2-3個と小油球1-2個があり, 魚体はやせ長い。<BR>4. ふ化後24時間頃から, 仔魚膜鰭は異状に発達し, 頭胴部においては特に巾広くふくらむが, これは本種の仔魚前期の特徴の一っで, 顕著な浮游生活と関連があるのではないかと推測される。<BR>5.ふ化後5日, 全長2.40mm内外で卵黄を吸収し仔魚後期に入る。<BR>6.ふ化後96時間でニワトリの卵黄に, 9日でブライ・ンシユリンプのノウプリウスに餌付きし, ふ化後26-31日で全長6.6mm前後になり稚魚期に達する。

著者

波戸岡 清峰

出版者

The Ichthyological Society of Japan

雑誌

魚類学雑誌 (ISSN:00215090)

巻号頁・発行日

vol.32, no.4, pp.379-386, 1986-03-15 (Released:2010-06-28)

参考文献数

17

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ウツボ科魚類において顎歯の形態, 配列様式は重要な分類形質となるが, その顎歯に性的二型のあることがアラシウツボ属Echidna2種, ウツボ属Gymnothorax 1種において観察された.アラシウツボ属のクモウツボE.nebulosaとシマアラシウツボE.polyzonaでは歯の形態に差異が認められる.これら2種の雄は前上顎骨板周辺列の歯が鋭い.またクモウツボの雄ではこの部分の歯および下顎前部の歯に顕著な鋸歯状部を持つ。一方, 両種の雌は鈍い円錐状である.

著者

落合 明 益田 一

出版者

The Ichthyological Society of Japan

雑誌

魚類学雑誌 (ISSN:00215090)

巻号頁・発行日

vol.21, no.3, pp.165-167, 1974

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In February 10, 1974, a strange hawkfish, 47.0 mm in standard length, 56.5 mm in total length, referred to <I>Oxycirrhites typus</I> Bleeker, which has not previously been reported from Japan was taken at a depth of 40 meter on the coast of Izu, Shizuoka Prefecture.The fish is characterized by having peculiar pectoral fin, the lower several rays of which are unbranched and thickened, elongated snout, well-serrated preopercle and the slender body with reddish fretwork.The specimen examined here agrees with Bleeker's holotype and other specimens of the species obtained from some tropical seas of the Indo-Pacific except for larger eye (4.8 in head length for the present specimen, 5.5 to 6.4 for others), fewer serrations of the preopercle (8 instead of 11 to 23), and moderately forked caudal fin (slightly forked fin in the holotype).

著者

増田 紳哉 小沢 貴和 多部田 修

出版者

The Ichthyological Society of Japan

雑誌

魚類学雑誌 (ISSN:00215090)

巻号頁・発行日

vol.32, no.4, pp.392-399, 1986-03-15 (Released:2010-06-28)

参考文献数

9

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D'Ancona and Cavinato (1965) が規定したBregmaceros nectabanus Whitleyの3 formsの精査により, Southeast Atlantic and Indo-Malayan formとFiji Islands formは, B.nectabanus (Toyama Bay form) と尾鰭主鰭条数 (14に対し後種は13) および腹部の外観 (色素化しているに対し後種はしていない) において明らかに異なることが知られた.SE Atlantic and Indo-Malayan formを新種B.neonectabanusとして記載した.新種と色素配列のみで異なる残りのformの分類学的問題は今後の研究課題として残された.本研究で新種は日本周辺の2海域から採集された.

著者

上原 匡人 本永 文彦 太田 格 海老沢 明彦 宮岡 勇輝 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

vol.68, no.2, pp.129-142, 2021

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<p>The Indian mackerel <i>Rastrelliger kanagurta</i> is an important coastal fishery resource for Okinawa Prefecture, southwestern Japan. However, much is still unknown about its life history. The early development, occurrence, sexual maturation, and reproductive cycle of the species was examined from specimens collected from the coastal waters of Okinawa Island, and management of the fishery evaluated. Larvae [3.4 mm notochord length–12.5 mm standard length (SL)] and juveniles (11.4–16.2 mm SL) of <i>R. kanagurta</i> were distinguished from other mackerel species by: 1) numbers of myomeres, 2) absence of spines on the preopercle posterior margins, 3) positional relationship between the upper and lower jaw tips, 4) melanophore pattern, and 5) distribution (allopatric). Both larvae and juveniles occurred in the offshore epipelagic zone of Nakagusuku Bay in May, June, and August, which coincided with the occurrence of high-gonadosomatic value adults in coastal waters. However, specimens were not encountered in extremely shallow coastal areas (e.g., tidal flats), although younger individuals may utilize such the offshore epipelagic zone of the bay, attaining fork lengths (FL) of ca. 8 cm. Individuals mature at ca. 26 cm FL, one year after hatching. <i>R. kanagurta</i> are primarily caught by set net fishery near Okinawa, small (immature) individuals accounting for > 45% of netted individuals in all months, except May and June, during the period from April 1985 to April 1987, and for > 35% of the examined individuals in all months, except June and July, between April 2011 and March 2016. These results for both periods suggest growth overfishing. Accordingly, immature individuals must be conserved to sustain the Okinawan population of <i>R. kanagurta</i>.</p>

著者

上原 匡人 太田 格 海老沢 明彦 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

vol.68, no.2, pp.93-107, 2021

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<p>Two closely related, commercially important threadfin breams, <i>Nemipterus furcosus</i> and <i>N. peronii</i>, are an essential coastal fishery resource in Okinawa Prefecture. The age, growth, reproductive cycle, and stomach contents from 124 <i>N. furcosus</i> and 37 <i>N. peronii</i>, obtained from November 2011 to December 2015, were examined, age being assessed from sectioned otoliths and gonadal histology. <i>Nemipterus furcosus</i> and <i>N. peronii</i> were the most abundant threadfin breams in Kin Bay and Nakagusuku Bay, Okinawa Island, areas including many coastal tidal flats, where the two species comprised 98.1% of the total number of <i>Nemipterus</i> individuals examined. Overall sex ratios of both species were significantly sex-biased, the apparent lack of transitional gonads implying functional gonochorism. The spawning seasons of both species were estimated as occurring between spring and fall, no immature fishes having been obtained. Age validation using edge-type analyses implied that opaque zones were formed once per year, being valid annual growth increments. Although no intersex differences in maximum length, growth equation, and age range were observed in <i>N. furcosus</i>, <i>N. peronii</i> females were larger and older than males. The greatest ages observed were 4.3 and 7.0 years for <i>N. furcosus</i> and <i>N. peronii</i>, respectively. Both species fed predominantly on crabs, which primarily occupied the inner bays. Over the previous 27 years, the catch per unit effort of <i>Nemipterus</i> has declined in the highly altered environments of Kin and Nakagusuku Bays, suggesting that the decline in the populations of these species at Okinawa Island may be due to coastal fishery practices, environmental decline, and the degradation of suitable habitats. The biological implications for conservation are discussed.</p>

著者

Maurice Kottelat

出版者

The Ichthyological Society of Japan

雑誌

魚類学雑誌 (ISSN:00215090)

巻号頁・発行日

vol.40, no.4, pp.427-431, 1994-02-15 (Released:2010-06-28)

参考文献数

16

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ミミズ型の体形で知られるVaillantella (Balitoridae: フクドジョウ亜科) の未記載種を東部ボルネオ・マハカム川水系より6個体採集し, V.cinnamomeaとして記載した.新種は同族のV.euepipteraやV.maassiと臀鰭軟条数91/2, 脊椎骨数34-36+16-17=51-52, 薄い茶色の体色, 吻端から鰓蓋に及ぶ1本の黒色帯, 体前部の不明瞭な2本の縦帯を合わせ持っことにより区別できる.