著者

冨澤 輝樹 木島 隆 二見 邦彦

出版者

日本魚類学会

雑誌

魚類学雑誌 (ISSN:00215090)

巻号頁・発行日

vol.62, no.1, pp.51-57, 2015-04-25

著者

冨澤 輝樹 木島 隆 二見 邦彦 高橋 清孝 岡本 信明

出版者

日本魚類学会

雑誌

魚類学雑誌 (ISSN:00215090)

巻号頁・発行日

vol.62, no.1, pp.51-57, 2015

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<p>A genetic analysis of wild-caught tetsugyo from Yutori-numa Pond, Miyagi Prefecture, a long-finned fish of uncertain origin designated as a National Natural Monument in Japan, demonstrated that some specimens were hybrids of goldfish (<i>Carassius auratus</i>) and crucian carp (genus<i> Carassius</i>). Phylogenetic analysis of sequences from part of the D-loop region of mitochondrial and nuclear DNA of 87 Yutori-numa tetsugyo indicated that 66 belonged to the goldfish group and 21 to the Japanese crucian carp group, subsequent PCR-RFLP analysis of c-<i>myc</i> gene revealing three different restriction fragment digest profiles, 21 and 60 specimens possessing goldfish or Japanese crucian carp genes, respectively, and the remaining 6, both genes, indicating their hybrid origin.</p>

著者

尼岡 邦夫 阿部 晃治

出版者

日本魚類学会

雑誌

魚類学雑誌 (ISSN:00215090)

巻号頁・発行日

vol.23, no.4, pp.185-191, 1977-03-31 (Released:2010-06-28)

参考文献数

9

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襟裳岬沖500-1000mの深みから採集された3個体のセキトリイワシ科魚類を調査した.1個体は下顎が著しく突出し, その縫合部に前向の1突起を具えることなどから本邦から未報告のBajacaliforniaウチグチイワシ属(新称)に含まれる種類であった.本属には世界各地から4種類が知られているが, 本個体は体が細長いこと, 横列鱗数が少ないこと, 口が著しく大きいことおよび吻が短いことなどから, これらのいずれの種類にも同定されず夢新種ウケグチイワシBajacalifornia erimoensisとして記載した.他の2個体はコンニャクイワシに同定された.本種は1914年青森から得られた標本にもとついてJordan and Thompsonによって記載されて以来報告がなく, 第2番目の記録である.

出版者

日本魚類学会

雑誌

魚類学雑誌 (ISSN:00215090)

巻号頁・発行日

vol.43, no.1, pp.50-57, 1996-05-31 (Released:2010-06-28)

著者

明仁親王

出版者

日本魚類学会

雑誌

魚類学雑誌 (ISSN:00215090)

巻号頁・発行日

vol.16, no.3, pp.93-114, 1969-12-20 (Released:2010-06-28)

参考文献数

34

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In order to establish a firmer classification of gobies, certain characters (listed in the title) were examined.The gobies studied were arranged in four groups on the basis of three featurs (Table2), namely, the presence or absence of the mesopterygoid and of the upper postcleithrum, and the number of branchiostegals.These characters were thought to be more reliable than the other four that were investigated-namely, the pelvic fins, scapula, lower postcleithrum, and suborbitals-because of individual variations in the latter at the intraspecific level and interspecific variations among related species.The characters of the four groups are shown in table2.Group 1 is thought to be the least specialized, because of minimal reduction of bones and the completely separated pelvic fins with a spine and five branched soft rays (except Percottus glehni).In many of the included species the enclosing scapula type, and in two of them a suborbital, were present.Groups 2 and 3 are intermediate between groups 1 and 4 from the point of view of these characters.Group 4 is regarded as the most specialized because of the greatest loss of bones.None of the members of this group (except one among threespecimens of Eleotriodes longipinnis and one among sixteen specimens of E.strigatus) displayed completely separated pelvic fins with five branched soft rays, and none had the enclosing scapula.Instead, the membrane uniting the pelvic fins, the pelvic frenum, fewer pelvic soft rays, and the blotched scapula or no scapula were found.Although group 4 seems capable of being divided, it is left undivided in this study because of the characters used.Owing to the limited number of species and characters examined here it is impossible to know more than that these four groups show four levels of specialization.

著者

相良 恒太郎 吉田 有貴子 西堀 正英 国吉 久人 海野 徹也 坂井 陽一 橋本 博明 具島 健二

出版者

日本魚類学会

雑誌

魚類学雑誌 (ISSN:00215090)

巻号頁・発行日

vol.52, no.1, pp.35-39, 2005-05-25 (Released:2010-06-28)

参考文献数

13

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A phylogenetic analysis, based on the complete nucleotide sequences of the mitochondorial control region (D-loop), was conducted on Mola mola occurring around the Japan coast. Two significantly distant clades (bootstrap value 914, based on 1000 replicates) were recognized. One consisted of 19 specimens with 812-814 by D-loop sequences that were collected from geographically wide spread locations around Japan (Aomori to Kagoshima). The other clade consisted of 3 specimens (all greater than 2 m in total length) collected from the Pacific coast of eastern Japan and characterized by 817 by D-loop sequences with many nucleotide substitutions compared with the former clade (ca.100 positions).

著者

太田 博巳

出版者

日本魚類学会

雑誌

魚類学雑誌 (ISSN:00215090)

巻号頁・発行日

vol.30, no.4, pp.404-411, 1984-02-15 (Released:2010-06-28)

参考文献数

23

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ニシン卵は強い粘着性を示す。この粘性物質の起源と排卵された卵の卵膜中での所在部位を明らかにする目的で, 排卵前後の卵濾胞および排卵された卵の卵膜を電顕的に観察した。排卵前の濾胞の顆粒膜細胞中には, メチレンブルーに濃染され, 種々の電子密度を示す直径2μm以下の顆粒が多数存在した.また, この顆粒は卵門細胞とその周囲の顆粒膜細胞には存在しなかった.これに対して排卵後の濾胞の顆粒膜細胞では顆粒が消失しており, 卵門部位を除く卵膜表面に電子密度の高い薄層が新たに認められ, この薄層は強い粘性を示した.また, 卵門部位の卵膜表面には粘着物質を欠き, これとは異なる物質が観察された。以上の観察結果より, ニシン卵の粘着物質は, 排卵前濾胞の卵門域を除く顆粒膜細胞中に存在する顆粒に起源し, その顆粒は排卵直前に卵膜表面に分泌されることが明らかとなった。

著者

谷内 透 立川 浩之

出版者

日本魚類学会

雑誌

魚類学雑誌 (ISSN:00215090)

巻号頁・発行日

vol.38, no.1, pp.57-60, 1991-03-28 (Released:2010-06-28)

参考文献数

13

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原記載の比較に基づいて, 台湾産のシロカグラHexanchus nakamuraiはバハマ諸島産のH.vitulusの上位同物異名であることを検証した.本種は近縁種のカグラザメH.griseusとは下顎に櫛状の大きな歯が1列に5個並ぶこと (カグラザメでは6個), 胸鰭後縁が凹むこと, 尾柄が長く臀鰭基底の少なくとも1.5倍はあること, 背鰭は尾鰭から少なくともその基底長の2倍離れていることで区別される.本種が小笠原諸島周辺, 高知沖に分布することを明らかにした.本報が本種の日本初記録である.

著者

工藤 孝浩

出版者

日本魚類学会

雑誌

魚類学雑誌 (ISSN:00215090)

巻号頁・発行日

vol.58, no.1, pp.99-104, 2011 (Released:2014-03-07)

参考文献数

19

著者

北川 えみ 中島 淳 星野 和夫 北川 忠生

出版者

日本魚學振興會

雑誌

魚類學雜誌 (ISSN:00215090)

巻号頁・発行日

vol.56, no.1, pp.7-19, 2009-04 (Released:2011-03-05)

著者

亀甲 武志 岡本 晴夫 氏家 宗二 石崎 大介 臼杵 崇広 根本 守仁 三枝 仁 甲斐 嘉晃 藤岡 康弘

出版者

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.1-8, 2014-04-25 (Released:2016-05-22)

参考文献数

24

被引用文献数

1

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To clarify the reproductive ecology of the endangered cyprinid Honmoroko, Gnathopogon caerulescens, endemic to Lake Biwa, the occurrence of eggs in inlets, sex ratio and monthly changes in gonad somatic indices (GSI) were investigated in the Nishinoko lagoon, adjacent to Lake Biwa, from March to May, 2012. Eggs of Honmoroko were found on gravel and vegetation in two inlets, suggesting that not only the reed zone of Lake Biwa and its lagoons but also inlets of the lagoons are important spawning habitats of that species. The sex ratios of individuals collected in the two inlets were more malebiased (11.2–32.1 : 1) than that in the reed zone of the lagoon (1.5–2.7 : 1). The GSI of males gradually decreased as the breeding season progressed, those of females not showing any significant statistical changes, except for individuals collected around the reed zone and inlet in April. It was concluded that males remain in inlets and the reed zone during spawning, whereas females migrate to the inlets only for spawning, subsequently returning to the reed zone until the next spawning session.

著者

Tokiharu ABE Shiro SHINOHARA

出版者

日本魚類学会

雑誌

魚類学雑誌 (ISSN:00215090)

巻号頁・発行日

vol.9, no.1-6, pp.163-171_1, 1962-10-31 (Released:2010-06-28)

参考文献数

4

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Three species of lutianid fishes of the genus Paracaesio, namely, P. caeruleus (KATAYAMA), P. kusakarii ABE and P. tumidus (TANAKA), are important food-fishes in Japan and Ryukyu Islands. In addition to these species, there occurs another congener in Ryukyu, and, though not commonly met with, it is known as “ Hingashitchu* ” among a few experienced fish-dealers in the island of Okinawa, one of the Ryukyus. In 1960, the junior author suggested without giving it a new scientific name that the “ Hinga-shitchu ” might represent a new species, and since passed on the specimens of this fish to the senior author who has access in Tokyo to thousands (of caeruleus) or hundreds (of kusakarii and tumidus) of individuals of the three congeners mentioned above in a year. As these members of Paracaesio are subject to considerable individual variation in the shape of the body, coloration, size and arrangement of teeth, etc. (probably correlated with the sexes at least partly), and as the number of the specimens of the “ Hinga-shitchu ” available is so small, it took some time before the present authors have been led to the conclusion that a new scientific name should be given to the “ Hinga-shichu ” and that it is very closely related to Apsilus fuscus** KLUNZINGER (not of VALENCLENES, 1830) known from Red Sea and Paracaesio xanthurus (BLEEKER) from the East Indies.

著者

柳生 将之 中村 寛志 宮崎 敏孝

出版者

日本魚類学会

雑誌

魚類学雑誌 (ISSN:00215090)

巻号頁・発行日

vol.54, no.2, pp.187-196, 2007-11-26 (Released:2011-12-02)

参考文献数

32

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To develop a method for harmlessly identifying individual Japanese charr, Salvelinus leucomaenis, the distribution and shape of parr marks were examined in fluvial specimens. Fish captured in six markandrecapture samples from a tributary of the Tenryu River (35°41'N, 138°07'E, El. 1, 045m) between June 2005 and May 2006 were photographed, and the linear distance and width of each parr mark on the lateral line measured from digital images. Similarities between and within individuals during growth were analyzed using square Euclidean distances. A photomatching test was also conducted.The number of parr marks and the parr mark ratio increased with body length (BL) up to 50 mm BL. The square Euclidean distance was not correlated with the number of days until recapture, although there was a negative correlation with initial BL (distribution: r=-0.25, P=0.029, width: r=-0.24, P=0.038). The similarity analysis discriminated 74% and 95% of parr mark distribution and width, respectively, in the same individuals. In the photo-matching test, 8 of 10 testers identified 20 individuals from 40 photographs (average accuracy 97%), the exercise requiring about 2 h per tester.This method, utilizing parr marks, enables the identification of individuals with visible parr marks on the base of tail (BL>32 mm) without harming the fish. This should be useful for identifying fish with parr marks, especially in endangered charr populations.

出版者

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.48-50, 2014-04-25

著者

片野 修 細谷 和海 井口 恵一朗 青沼 佳方

出版者

日本魚類学会

雑誌

魚類学雑誌 (ISSN:00215090)

巻号頁・発行日

vol.48, no.1, pp.19-25, 2001-05-25 (Released:2010-06-28)

参考文献数

31

被引用文献数

12

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Freshwater fish in rice fields near the Chikuma River, Nagano Prefecture, were investigated by visual census and net sampling. The rice fields were classified into three types. Type 1-terraced and supplied with water from an upper pond; type 2-supplied with water from drainage ditches; and type 3-supplied and drained by separate irrigation ditches. Rhinogobius sp.OR (sensu Kawanabe and Mizuno, 1989), Misgurnus anguillicaudatus and Pseudorasbora parva were abundant in type 1 fields, whereas Tribolodon hakonensis, Carassius spp., M. anguillicaudatus and Gnathopogon elongatus elongatus were recorded in type 2 fields. Only M. anguillicaudatus was found in type 3 fields. The fish abundance and diversity did not differ significantly between type 1 and 2, but was extremely poor in type 3. The recent rearrangement of rice fields from types 1 and 2 to type 3 evidently reduced fish abundance and diversity.

著者

桑原 雅之

出版者

日本魚類学会

雑誌

魚類学雑誌 (ISSN:00215090)

巻号頁・発行日

vol.60, no.1, pp.63-67, 2013-04-25 (Released:2015-05-05)

参考文献数

33

被引用文献数

1

著者

桑原 雅之 井口 恵一朗

出版者

日本魚類学会

雑誌

魚類学雑誌 (ISSN:00215090)

巻号頁・発行日

vol.40, no.4, pp.495-497, 1994-02-15 (Released:2010-06-28)

参考文献数

21

被引用文献数

3

著者

岸野 底 米沢 俊彦

出版者

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.91-101, 2013-11-05 (Released:2015-12-26)

参考文献数

40

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The longitudinal distribution of Ryukyu-ayu Plecoglossus altivelis ryukyuensis in the Katoku River, a small stream on Amami-oshima Island, southern Japan, was observed from December 2003 to November 2004. The number of Ryukyu-ayu in pools was greater than in glides or riffles in each life history season [spawning (Nov. to Feb.), up stream migration (Mar. to May) and growth (Jun. to Oct.) seasons], an analysis by Spearman’s correlation coefficient by rank test indicating that such abundance in pools tended to be consistently greater in lower reaches. This suggests that large pools in lower reaches are an important habitat for Ryukyu-ayu in the Katoku River. Accordingly, for the future conservation of the lower reaches and creation of large pools may be a positive step of this endangered fish.

著者

片野 修

出版者

日本魚類学会

雑誌

魚類学雑誌 (ISSN:00215090)

巻号頁・発行日

vol.40, no.4, pp.441-449, 1994-02-15 (Released:2010-06-28)

参考文献数

21

被引用文献数

6

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京都市の二河川でカワムツとオイカワが同所的に生息し, 同種内と同様に二種間でも攻撃行動を行った.両種において大型個体は小型個体より頻繁に表層部を利用し, 種内及び種間の干渉において優位であった.カワムツとオイカワの両種とも雑食性であったが, オイカワの方がカワムツよりも付着藻類を摂食する頻度が高かった.両種の摂餌場所には大きな違いはなく, その周辺で多くの種間攻撃が起こった.両種とも攻撃的干渉と付着藻類摂餌行動の頻度との間に有意な相関関係がみとめられた.両種の個体の行動圏は多くの場合互いに重複していたが, 同種及び他種に対して縄ばりが形成されることも観察された.

著者

木村 清朗 長田 芳和

出版者

日本魚類学会

雑誌

魚類学雑誌 (ISSN:00215090)

巻号頁・発行日

vol.38, no.4, pp.425-429, 1992-02-29 (Released:2010-06-28)

参考文献数

14

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日本産バラタナゴは, 在来のニッポンバラタナゴRhodeusocellatus smithiiと中国渡来のタイリクバラタナゴR. ocellatus ocellatusに分けられていた.Acheilognatus smithiiとR. kurumeusの完模式標本を観察したところ, A. smithiiは, 体側に長い明瞭な暗色縦帯をもち, 背鰭と轡鰭の最初の主鰭条がやや強く, 分節が少ないので, バラタナゴとはいえない.R. kurumeusの形態は, ニッポンバラタナゴによく一致した.タイリクバラタナゴの日本への侵入は第二次大戦中であったので, 1900年採集のR. kurumeusの完模式標本, 副模式標本1個体, ほか10個体の標本は, すべてニッポンバラタナゴと判断された.したがって, ニッポンバラタナゴの学名としてR. ocellatus kurumeusが正しい.一方, A. smithiiは, カゼトゲタナゴR. atremiusとスイゲンゼニタナゴR. suigensisによく似るが, どちらとも判定できなかった.