魚類学雑誌
Online ISSN : 1884-7374
Print ISSN : 0021-5090
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2 巻 , 6 号
選択された号の論文の7件中1~7を表示しています
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  • Giles W. MEAD, James BÖHLKE
    2 巻 (1952 - 1953) 6 号 p. 241-245
    公開日: 2010/06/28
    ジャーナル フリー
    The specimens described below are part of a collection of fishes assembled by a group of American, Canadian and Japanese biologists who were engaged in a study of the North Pacific fur-bearing seal during the spring of 1952. Although all three specimens are juveniles, they are sufficiently developed to be recognizable as an undescribed species and to be compared with thier known ralatives. Among other distinctive characters, the teeth of the tongue serve to identify our specimens with the family Scopelarchidae.
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  • Hisao KOBAYASI
    2 巻 (1952 - 1953) 6 号 p. 246-260
    公開日: 2010/06/28
    ジャーナル フリー
  • 野村 稔
    2 巻 (1952 - 1953) 6 号 p. 261-270
    公開日: 2010/06/28
    ジャーナル フリー
    (1) 日本産サケ科魚類3屬・8種 (Table 1) の口腔内の各骨及口腔上壁の鋤骨や口蓋骨部の各隆起等を比較観察し、それらのうちで何れが屡及種の分類形質となり得るか、又これら分類形質によつてどの程度サケ科魚類が分類し得るかを槍討た。
    (2) 口部骨格で各魚種の特徴を比較的表わしているのは鋤骨と舌骨であつて、口部骨上の歯は産卵期に於ける脱落多く、又年令増加によつて歯数も異り、歯数の個体変異は他種の変異と重なり合い種の分類形質とはなり難い、 (Figs.2, 3) 。
    (3) 隆起配置、各部の隆起の形態、口蓋膜の様子及口蓋骨部隆起と鋤骨部隆起の口腔上壁先端に於ける接續状態では、年令増加による變化、雌雄による変化及個体変異は認められなかつた (Plates 1, 2, 3) 。これら形質はサケ科魚類の屡及種の分類形質とすることが出來る。
    (4) 屡の分類は隆起配置のみでし得る。即ちサケ屡の隆起配置は小字型を (Fig.1 A~D) 、ニジマス屡はT字型を (Fig.1 E, F) 、イワナ屡はM字型をしている (Fig.G, H) 。
    (5) サケ屡及イワナ屡の各種は鋤骨部及口蓋骨部隆起の形態や接續状態及口蓋膜の形態により分類することができ、ニジマス属の各種は上顎主骨及口蓋骨上の歯の大きさや生え方の粗密を上記の分類形質と共に用いれば分類することが出來る (Fig.1, 檢索表参照) 。
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  • 黒田 長禮
    2 巻 (1952 - 1953) 6 号 p. 271-284
    公開日: 2010/06/28
    ジャーナル フリー
    The present article contains an introductory notes on Lake Biwa with some notes on the fishes, a brief history of the study on the fishes of this lake, from 1806 to the most recent (1951), and a complete list of the fishes of Lake Biwa (45 species and subspecies found in the lake itself, in addition to two species found near this lake and 13 introduced species) with their distribution records in Japan and the neighbouring couneries.
    The mark × indicates simply the occur ence of the species or forms found in the region named at the top of the column and the mark _??_, that the same is known to be found as an introduced species in the region.
    Next I have given the names of localities around or near Lake Biwa with the names of collected fishes in old and new records.
    Lastly, in my conclusion concerning the distribution of these fresh water fishes found in this lake, I have noted two endemic forms: Gnathopogon elongatus caerulescens and Chaenogobius annularis isaza; 19 species are confined to the Japanese waters, and most of the remaining ones (about 30) are common to the Asiatic Continent in their distribution.
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  • 冨山 一郎
    2 巻 (1952 - 1953) 6 号 p. 285-289
    公開日: 2010/06/28
    ジャーナル フリー
    In this paper are given notes on studies of some Chinese fishes, which were made while the author was a member of the staff of the Shanghai Science Institute, from 1938 to 1945.
    1. Hypophthalmichthys molitrix (Cuv. et VAL.). H. moitrix (Cuv. et VAL.), Aristichthys nobilis (RICHARDSON), Ctenopharyngodon idellus (Cuv. et Val.) and Mylopharyngodon aethiopus (BASILEWSKY) are much appreciated as edible pondfishes in the lower Yangtze region. It has been said that these cyprinoid fishes never spawn in fish ponds; however, on hearing that some of them spawn in a pond near Shaohing, Chekiang, a visit was made to this pond at the beginning of the spawning season to confirm this fact. Dissection of several individuals of both sexes of H. molitrix, which attained the adult size in the natural condition, showed that the ovary was well developed, but the testis slender and very poorly developed. The fishermen stated that this species, the only one which was being cultured in this district, spawned every year, but the eggs sooner or later decayed completely. These facts suggest that the ovary of this fish is able to develop even in fish ponds, but the testis cannot mature, when the fish is cultured artificially.
    2. Hemirhamphus kurumeus (JORDAN et STARKS). H. sajori (nec TEM. et Sand.) heretofore always reported from the lower Yangtze basin (except the esturary) is to be synonymised with H. kurumeus (JORDAN et STARKT).
    3. Fugu (Torafugu) ocellatus obsculus (ABE). The puffer occurring in the Yangtze River and its tributaries, which has hitherto been known as Spheroides ocellatus (nec OSBECK), is referable to F. (T.) ocellatus obsculus (ABE). The species ocellatus of Os-BECK has the characteristic white-edged black band across the back, but none of the specimens of the puffer collected by the author from the lower Yangtze region has such a band; the geunus Fugu and the subgenus Torafugu were proposed by Dr. ABE. As young individuals of this puffer are caught in this region throughout the year, some of them are believed to remain in the purely freshwater region without returning to the sea from a large river such as the Yangtze.
    4. Alerisucus sp.Although the name A. abbreviatus (Gray) has been given to the species of sole occurring in the lower Yangtze River and its tributaries, there seem to be reseans to doubt this classification. For the determination of the scientific name of this sole, it is desirable that comparative studies between this and many related Chinese species be carried out.
    5. Acanthogobius hasta (TEM. et ScHL.). Gobius ommaturus RICHARDSON is certainly a synonym of A. hasta (TEM. et ScHL.); hasta was described from a specimen in poor condition after spawning, while ommaturus was based on a specimen before spawning.
    6. Chaeturichthys sp.A species of Chaeturichthys occurs near Chusan Island, Chekiang. This species is closely allied to C. hexanemus BLEEKER, but is distinguished by the irregular arrangement of the scales on the posteior part of the body and the caudal peduncle. The specimen of this goby collected by the author were left in a bottle, labelled Chaeturichthys variegatus, in the Shanghai Science Institute.
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  • 冨山 一郎
    2 巻 (1952 - 1953) 6 号 p. 289-290
    公開日: 2012/02/09
    ジャーナル フリー
  • 2 巻 (1952 - 1953) 6 号 p. 290
    公開日: 2010/06/28
    ジャーナル フリー
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