著者

新井 良一

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.20, no.1, pp.1-6, 1973-06

著者

横井 謙一 佐々木 哲朗 鈴木 寿之

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.56, no.1, pp.67-70, 2009

被引用文献数

1

著者

立原 一憲

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.56, no.1, pp.70-74, 2009

著者

鈴木 寿之 向井 貴彦

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.57, no.2, pp.176-179, 2010

著者

金澤 光

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.56, no.2, pp.175-178, 2009

著者

杉山 秀樹 森 誠一

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.56, no.2, pp.171-175, 2009

著者

松本 瑠偉 内田 詮三 戸田 実 仲谷 一宏

出版者

日本魚類学会

雑誌

魚類學雜誌 (ISSN:00215090)

巻号頁・発行日

vol.53, no.2, pp.181-187, 2006-11-25

著者

松浦 啓一

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.39, no.4, pp.p409-411, 1993-02

著者

小山 直人 森 幹大 中井 宏施 北川 忠生

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.81-86, 2011

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Genetic disturbance in wild populations of Medaka (Oryzias latipes) has resulted from the introduction of populations originating from commercial strains. To clarify the genetic composition of orange-red type and wild type commercial strains of O. latipes ('himedaka' and 'kuromedaka', respectively), polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) and sequencing analyses of the mitochondrial cytochrome b gene were conducted for Medaka populations cultured in 2 fish farms and others purchased from 21 aquarium fish shops. All 'himedaka' populations showed a high frequency of the B27 mitotype, an original mitotype of 'himedaka', and a low frequency of the B1a mitotype, an introduced mitotype from wild populations in Okayama or Nara Prefectures. 'Kuromedaka' populations, originating from cultured populations, were characterized primarily by the B27 and B1a mitotypes, being a result of hybridization between wild populations and 'himedaka'. All 'kuromedaka' populations originating from wild populations had their own native mitotypes, although some also had the B1a mitotype, which was inferred as being of 'himedaka' origin.

著者

西大 嵩樹 丸山 敦

出版者

日本魚類学会

雑誌

魚類学雑誌 = Japanese journal of ichthyology (ISSN:00215090)

巻号頁・発行日

vol.64, no.2, pp.113-119, 2017-11-25

著者

小川 力也

出版者

日本魚類学会

雑誌

魚類學雜誌 (ISSN:00215090)

巻号頁・発行日

vol.55, no.2, pp.144-148, 2008-11-25

参考文献数

13

著者

邉見 由美 乾 隆帝 後藤 龍太郎 伊谷 行

出版者

日本魚類学会

雑誌

魚類学雑誌 (ISSN:00215090)

巻号頁・発行日

pp.18-021, (Released:2018-09-10)

参考文献数

24

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Eight specimens of a threatened goby, Gymnogobius macrognathos (30.04– 38.87 mm in standard length), were collected on a mudflat characterized by abundant burrows of Upogebia major, at Akkeshi, Hokkaido, northern Japan in August 2017. Because G. macrognathos specimens were collected directly from U. major burrows by suction pump, and were also collected with U. major by digging sediment exposed at low tide, it was concluded that G. macrognathos utilized U. major burrows on the tidal flat. Gymnogobius mororanus and an unidentified species of Gymnogobius also utilized U. major burrows. The presence of G. macrognathos at Akkeshi represents the northernmost record of the species in Japanese waters, the isolated population being ca. 500 km north of the main distributional range of the species along the Pacific coast of Japan.

著者

William F. Smith-Vaniz 吉野 哲夫

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.32, no.1, pp.18-27, 1985-05-30 (Released:2010-06-28)

参考文献数

27

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日本産アゴアマダイ属魚類Opistognathusを再検討した結果, 既知の4種の他にイレズミアマダイO.decorusおよびセトアマダイO.liturusの2新種を確認した.前種は沖縄島, 後種は和歌山県白浜で採集されたものであり, いずれも頭部に顕著な斑点をもつことや背鰭軟条数が11~12と少ないことで, 他種とは明瞭に区別される.イレズミアマダイは鯉耙数が多いこと, 頭部感覚孔数が少ないこと, 両眼間隔が広いこと, 眼径が小さいこと, 眼下骨の形が異なることなどでセトアマダイと区別できる.従来用いられたGnathypopsやMerogymnusはOpistognathusのシノニムであり, 上記の2新種を含めた日本産本属魚類の検索表を作製した.

著者

向井 貴彦

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.48, no.1, pp.1-18, 2001-05-25 (Released:2011-07-04)

参考文献数

130

被引用文献数

1

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Hybridization and introgression have been considered important aspects in the speciation process and evolution of reproductive barriers. Although most hybrid zones of animals have been consideredas ‘tension zones, ’ maintained by dispersal/selection balance of hybrids, many of the hybrid zones of freshwater fishes may lead to hybrid swarm. On the other hand, some of the hybrid zones of diadromous, brackishwater and maritime fishes may, infact, be ‘tensionzones’ and widespread introgression of genes. These differences may be dependent upondispersal abilities, because migration from ‘pure’ populations to a hybrid zone (and vise versa) can be expected in widely dispersible species, but not in drainage-restricted freshwater fishes. Although many of the examples of fish hybrid zones may have originated fbllowing secondary contact of geographically-isolated populations, reinfbrcement of reproductive barriers have not appeared. In particular, hybrid swarms of freshwater fishes have often emerged as hybrid-origin species. In some cases in brackishwater species, mtDNA trees have suggested long term hybridization, there being no evidence for reinfbrcement. One of the reasons fbr the continuing existence of hybrid zones (and genetic differences among populations) may be environmental selective pressures in ecotones, because ‘tensionzones’ of fishes originally fbrmed in a transitional zone between different environments.

著者

西田 高志 中園 明信 鬼倉 徳雄 及川 信 松井 誠一

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.1, pp.65-78, 2007-05-25 (Released:2011-06-08)

参考文献数

63

被引用文献数

2

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Between July 2002 and June 2005, the fish fauna on the reef in the Tsushima Current, northern Kyushu, was surveyed on a monthly basis by SCUBA diving. A total of 138 species and 42, 769 individuals occurred in the investigated area (1, 200 m2). Five fish species (Halichoeres tenuispinnis, Chromis notata notata, Sebastes inermis, Siganus fuscescens and Girella punctata) comprised approximately 53% of the observed individuals. The number of species and individuals strongly affected the fishes. Based on cluster analysis of the appearance patterns, the observed fishes were grouped into five types: (1) perennial type (Type P) comprising 36 species and 18, 346 individuals, (2) spring type (Type S) comprising 17 species and 2, 655 individuals, (3) summer-autumn type (Type SA) comprising 33 species and 17, 613 individuals, (4) autumn type (Type A) comprising 47 species and 4, 144 individuals, and (5) the others. In addition, differences in the species composition were observed during each season. Thus, fish fauna drastically changed according to the season, which is similar to reefs in temperate waters of Pacific coast of southern Japan.

著者

友田 淑郎

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.8, no.5-6, pp.126-146, 1962-06-30 (Released:2010-06-28)

参考文献数

33

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1) Comparative studies have been made on the three species of the genus Parasilurus found found in Lake Biwa-ko, both from the morphological and the ecological points of view. Proportions are examined for various parts of body, and the external characters of sensory organs and of certain feeding organs are scrutinized.2) The results obtained from these studies may be summarized as follows: in P. biwaensis, the development of external sensory organs is rather poor except for eyes, and the body as a whole is adapted for pelagic carnivorous life ; in P. lithophilus, sensory organs are well developed, and the body is adapted to a good extent for rupicolous life ; in P. asotus, two pairs of heavy barbels present, whereas the eyes are degenerated, and the body is adapted for bottom life in shallow turbid water.3) Percentages of the lengths of eight body parts against standard length are illustrated in graphs, and the types of their growths are compared. It may be seen from these graphs that specific difference is hardly found in some characters but is notable in the others. Moreover, the latter characters become divergent among species according to their growths.4) Irrespective of superficial variability of P. asotus, its specific peculiarity has become evident after many characters have been examined as a combination. Such a combination of characters is always peculiar to P. asotus and is correlated with the mode of its life, though respective characters are not stable according to the difference in external factors. Not giving proper consideration for ecological data, we might fail in realizing the accurate status of P. asotus, being only perplexed by its variable faces.5) Besides the differences mentioned above, there is another type of differenti ation among the species found in Lake Biwa-ko. This is the discrepancy in vomerine tooth-band, whose shape is always fixed in each species. The difference is, however, variable to a considerable extent in specimens taken from waters other than Lake Biwa-ko.6) Mere comparisons of specimens from various localities are of little importance, unless studies on habitats and life will be carried out. Future investigations in this line should be necessary on such problematical species of the genus Parasilurus as are spread over the Asiatic Continent.7) In clarifying the origin of the three species occurring in Lake Biwa-ko, it is necessary to investigate the topographical histories of the habitats of the respective species, besides researches for their habitats of the present day.8) It may be needed to conduct in future investigations on the developmental stages (etap) of the fishes.

著者

小早川 みどり

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.39, no.1, pp.25-36, 1992-06-15 (Released:2010-06-28)

参考文献数

15

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日本産のナマズ3種ナマズ (Silurus asotus), イワトコナマズ (S. lithophilus), ビワコオオナマズ (S. biwaensis) の成体の頭蓋と懸垂骨を比較し, それらの発生を記載した.稚魚期の成長の速いビワコオオナマズでは, 他2種に比べ化骨の時期が早く, 上後頭骨の矢状隆起の発達の度合いや, 翼耳骨の側上方への反り返りが大きく, 懸垂骨にみられる筋付着突起の発達も著しかった.

著者

岩槻 幸雄 本村 浩之 戸田 実 吉野 哲夫 木村 清志

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.47, no.2, pp.135-138, 2000-11-27 (Released:2010-06-28)

参考文献数

16

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A single carangid specimen (MUFS 12564, 204 mm standard length and 225 mm fork length), collected by a small set net within ca. 10 m depth at Meitsu, Nango, Miyazaki, Kyushu Island, Japan (131°23.5'E, 31°31.9'N), was identified as Trachinotus mookalee Cuvier in Cuvier & Valenciennes, on the basis of its short second dorsal fin lobe (24.0% of fork length) and anal fin coloring (lobe anteriorly yellow-golden, with weak melanophores). The specimen repre-sents the northernmost record of the species and first record from Japan. Observa-tions (at Nagasaki and Kanagawa Prefectures, Japan) of larger examples (ca. 60-90 cm in total length) of the species suggested a wide distribution around southern Japan, except the Ryukyu Islands. The specimen is described and a new Japanese name “kogane-marukoban” proposed for the species.

著者

梅沢 彰馬 塚本 勝巳 多部田 修 山川 紘

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.35, no.4, pp.440-444, 1989-03-15 (Released:2010-06-28)

参考文献数

16

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ウナギ耳石の初期の輪紋形成過程を明らかにすることを目的として, 孵化仔魚とシラスウナギの耳石の微細構造を検討した.3種の耳石の内, 扁平石は孵化時に既に形成していた.耳石は扁平で楕円形をしており中心部に核が観察され, その直径は8.3±1.02μmであった.孵化後, 耳石は目令と共に直線的に成長した.耳石上の輪紋は孵化時には認められなかったものの, 2日後, 4目後および6日後の魚の耳石には, それぞれ平均2.1本, 3.6本および6.0本認められた.輪紋数 (Y) と孵化後の日数 (X) の間には, 次のような極めて相関の高い直線関係が得られた: Y=0.96X+0.06, r=0.913, N=40, 一方, 95%のシラスウナギの耳石中心部において, 直径6-12μmの極めて明瞭な輪紋 (check ring) が認められた.これは光学顕微鏡下では幅の広い暗帯として, 電子顕微鏡下では深くエッチングされた輪紋として観察された.また, この輪紋は孵化時の耳石直径とほぼ等しく, 本種は孵化輪を形成するものと考えられた.以上の結果より直径6-12μmの孵化輪の外側の輪紋数は, その魚の目令を示すことが明らかになった.

著者

松原 喜代松 落合 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.1, no.2, pp.73-81, 1950-10-20 (Released:2010-06-28)