巻号一覧
1 巻, 4 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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皆森 壽美夫1951 年 1 巻 4 号 p. 215-225
発行日: 1951/02/28
公開日: 2011/07/04
ジャーナル フリー1)西日本産シマドジョウ類の12地方種族の形態的生態的差異について述べた.
2)9水系の11地方種族間に17組以上の雜種をつくり, その不姙現象について記載した.
3)池田氏の分類に基く種間雜種及び亜種聞雜種は完全に近い不姙となる.又同種内雜種にも同様な不姙現象を呈するものがある.
4)生理的隔離の有無を基準にして, 本邦産シマドジョウ類は池田氏の分類とは違つた數種に分けることが出來る.抄録全体を表示PDF形式でダウンロード (1949K) -
小林 久雄1951 年 1 巻 4 号 p. 226-237
発行日: 1951/02/28
公開日: 2010/06/28
ジャーナル フリーI am pursuing the comparative studies of scale character in fresh-water fishes and some marine fishes in East Asia. In the course of these studies, I have found that scale character shows definitely a certain affinity, at least, between genera, families, or larger groups, apart from the small problem of its indication of the characteristics of the grou3 to which a fish belongs and of its reference to species. This has l-s me to study the affinity between fresh-water fishes in4 Japan and their near related ones in the adjacent continent.抄録全体を表示PDF形式でダウンロード (2499K) -
石山 禮藏1951 年 1 巻 4 号 p. 238-250
発行日: 1951/02/28
公開日: 2010/06/28
ジャーナル フリーIn the present paper the writer gave a detailed analysis and comparison of the bones, especially of the cranium and some of the visceral skeletons in 5 species of the Japanese mugilid-fishes referred to three genera, Mugil, Liza and Chelon. By this study it was found that the osteological characters provide more clear specific and generic criteria and also more reliable indication of phyletic relation than the older schemes which based essentially on the external features.
In determining the relationship of the genera one another, the following characteristics are especially taken into consideration ; 1) presence or absence, and degree of differentiation, if present, of the basisphenoid;2) shape and degree of developement of parasphenoid, especially in the middle and posterior portions; 3) with or without the posterior opening of myodome; 4) presence or absence, and shape, if present, of the basioccipital process; 5) presence or adsence of elongated posterior-zygapophysis of the second vertebra; 6) form of the urohyal; 7) configulation of the post-temporal; 8) form of ethmoid region: and 9) form of preorbital.
The diversities of these organs have been simply divided into two categor-iies, viz, plus and minus, in each element, (Table 1 and 2). As indicated in these tables, the genus Chelon is, as a whole, most undifferentiated representative of the mugilids, although this fish having the remarkable basioccipital processes and peculiar shape of premaxillary. The genus Mugil is unquestionably more differentiated than the others in lacking both the basi-sphenoid and the posterior opening of the myodome, in having well developed parasphenoid and ethmoid, a pair of long posterior projection of urohyal, and three remarkable articular processes on post-temporal.
The genus Liza also more specialized than the genus Chelon at least in having peculiarly elongated posterior-zygapophysis in second vertebra, well developed ethmoid, three articular process on post-temporal, and in lacking the posterior opening in myodome, although premaxillary less developed than in the latter.
It is interesting to note that the genus Chelon, despite mostly generalized in the mugilid-fishes, provided with a few remarkably specialized characters as aforementioned. Is it not very reasonable, therefore, to think that the genus Chelon is rooted very deep in phylogeny within this group?抄録全体を表示PDF形式でダウンロード (1850K) -
松原 喜代松, 落合 明1951 年 1 巻 4 号 p. 251-259
発行日: 1951/02/28
公開日: 2011/07/04
ジャーナル フリーIn 1938, MATSUBARA made a statistical observation based upon 44 specimens belonging to the genus Synaphobranchus taken in Japanese waters, and suggested that the group of the genus represents a single species, Synaphobranchus pinnatus (GRONOW). In that study, however, he did not touch upon the vertebral counts.
On the other hand, BRUUN (1937) and NORMAN and TREWAVAS (1939) did really sound and comprehensive research in the taxonomy of this group.BRUUN classified the larval form of this group into several species besed upon the differences in counts of myotomes. NORMAN and TREWAVAS reexamined all the types of this group either directly or indirectly and classified them into i. number of species mainly based upon the differences in counts of vertebrae and the general forms of the scales on sides of body.
We have had of late an opportunity to examine 60 specimens of this group taken in various parts of Japan and have found that the specimens used in his previous study by MATSUBARA (1938) agree well with S. kaupii JOHNSON and that our present specimens can be distinguished into three species, S. kaupii JOHNSON, S. affinis GÜNTHER and S. brevido-rsalis GÜNTHER respectively, mainly by the differences in counts of vertebrae and general forms of both scales and upper pharyngeal teeth.抄録全体を表示PDF形式でダウンロード (1515K) -
矢部 博1951 年 1 巻 4 号 p. 260-263
発行日: 1951/02/28
公開日: 2011/02/23
ジャーナル フリーConcerning the larva of the swordfish, Lütken (1880) described them of about 35 mm found in the Atlantic Ocean, but there is no report on the existence in the neighbouring seas of Japan. The author caught three larvae of total length 11.0-27.4 mm in Kuroshio Region (the ocean current sweeping the southern coast of Japan) in May, 1949 and March, 1950. In this report their external appearance is described, and it is stated that they are similar to the adult of Istiophoridae except that they have no ventral fin in the larval stage.抄録全体を表示PDF形式でダウンロード (753K) -
Hiroshi NAKAMURA, Tadao KAMIMURA, Yoichi YABUTA, Akira SUDA, Shoji UEY ...1951 年 1 巻 4 号 p. 264-271
発行日: 1951/02/28
公開日: 2010/06/28
ジャーナル フリーPDF形式でダウンロード (1666K) -
胸鰭の變異(續)阿部 宗明1951 年 1 巻 4 号 p. 272-283
発行日: 1951/02/28
公開日: 2011/07/04
ジャーナル フリーPDF形式でダウンロード (2215K)
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