All issues
Volume 19, Issue 2
Displaying 1-13 of 13 articles from this issue
- |<
- <
- 1
- >
- >|
-
Tetsuo Yoshino1972 Volume 19 Issue 2 Pages 49-56
Published: September 20, 1972
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSA new species of anthiine fish, Plectranthias yamakawai, is described, based upon six specimens from Ryukyu Islands. P.yamakawai was previously reported as P.anthioides (Günther) by Kamohara and Yamakawa (1968).With description of this new species, a revision of the genus Plectranthias found in the waters of Japan is presented.View full abstractDownload PDF (7459K) -
Yukio Sawada, Ryoichi Arai, Tokiharu Abe1972 Volume 19 Issue 2 Pages 57-62
Published: September 20, 1972
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSSeventeen specimens of a new species of Gobiodon were collected along with eight specimens of G.quinquestrigatus and three specimens of G.citrinus from the Yaeyama Islands, southernmost islands of Okinawa Prefecture.The new fish is similar to, but different from G. atrangulatus and Pseudogobiodon macrochir, and is named here G.okinawae.Several characteristics of the new species are described, with special reference to the differences from G. quinquestrigatus, G. citrinus, G. atrangulatus, and Pseudogobiodon macrochir.View full abstractDownload PDF (734K) -
Yasuhiko Taki1972 Volume 19 Issue 2 Pages 63-81
Published: September 20, 1972
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSBotia eos is described as a new species from the Menam Chao Phya and the Mekong drainages in Thai-Lao region.The new species is distinguished from other related species primarily by having 10-41 branched dorsal rays.Its closest relatives appear to be B. horae and B.lecontei.The holotype and other specimens of B.lecontei are also described to supplement the original description. The genus Botia is usually divided into three subgenera, i.e., Botia, Hymenophysa, and Sinibotia.In Hymenophysa, which is represented by a Burmese and all Thai-Lao species except B.helodes, two distinct species-groups are recognized: one, hymenophysa-group, is charac-terized chiefly by the premaxillae with sickle-shaped anterior projections surrounding a cavity between them and small, simple mental lobes on the lower lip, and the other, modesta-group, to which B.eos is to be referred, by the ordinary premaxillae not surrounding a cavity and relatively large mental lobes with a pair of small fleshy papillae on each the lobe.The two species-groups, however, agree with each other in having a large fontanelle on the top of cranium, a less developed osseous capsule of gas-bladder, and a large posterior chamber of gas-bladder.B.macracantha is generally regarded as belonging to the subgenus Botia together with all Indian forms.However, though it approaches the subgenus Botia in the feature of the mental lobe, it shares the characters of the fontanelle and the gas-bladder with Hymenophysa rather than Botia.The morphological distinctness of B.macracantha and its range far apart from the main habitat of the subgenus Botia in India may probably suggest its unique phylogenetic position.View full abstractDownload PDF (8739K) -
A.S. Kapoor, P.P. Ojha1972 Volume 19 Issue 2 Pages 82-88
Published: September 20, 1972
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSThe anatomy of the olfactory organs in the moray, Muraena undulata, has been studied. It has an elongated rosette which has been placed in Burne's (1909) rosette column II and in Bateson's (1889) rosette type 2.The olfactory surface in M.undulata is very extensively developed. The species is a macrosmat and has been classified with Teichmann's (1954) group 3 of nose fishes.View full abstractDownload PDF (4197K) -
Nobuhiko Taniguchi, Akira Ochiai, Tsuguo Miyazaki1972 Volume 19 Issue 2 Pages 89-96
Published: September 20, 1972
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSThe electrophoretic patterns of muscle proteins, LDH and MDH of 11 species of platycephalid fishes collected from Japan were described and discussed in connection with the phylogenetic relationships among these species.The specific and generic differences were recognized in the electropherograms of this group.The phylogenetic relationships derived from the comparative morphology by Matsubara and Ochiai (1955) were fundamentally supported by the facts of the electrophoretic analyses made here.A remarkable discrepancy was found in the phylogenetic position of genus Rogadius.This genus well accorded with genus Suggrundus in the electrophoretic patterns of muscle proteins, LDH and MDH, though rather nearer to genus Onigocia than to Suggrundus in morphological characters.Two sibling species of Platycephalus, P.indicus and P.sp.usually called“Yoshinogochi”are distinguished from each other by the electropherogram of muscle proteins.View full abstractDownload PDF (3366K) -
Fumio Takashima, Takashi Hibiya1972 Volume 19 Issue 2 Pages 97-102
Published: September 20, 1972
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSIn the first filial generation of the Salvelinus miyabei×S.fontinalis hybrids, neoplasms on the skin surface were observed.The tumors were composed of atypical spindle cells producing collagenous fibers.The tumor cells invaded the tella subcutanea and trunk muscles.Metastases occurred in the kidney.The tumors grew rapidly, concomitant with gonadal development.One fish with the largest tumor died shortly after spawning.On the basis of these findings the tumors have been classified as dermal fibrosarcomas.Similar neoplasms developed in S.miyabei, but not in S.fontinalis.The circumstances suggest that genesis of these tumors is hormonally and genetically influenced.View full abstractDownload PDF (11585K) -
Prince Akihito1972 Volume 19 Issue 2 Pages 103-110
Published: September 20, 1972
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSA single gobiid specimen identified with Oxyurichthys ophthalmonema (Bleeker) was obtained from the mouth of the River Shimoyama, Hayama, Kanagawa Prefecture, September 19, 1970.To my knowledge, this species has not yet been recorded from Japan.As this goby is found in southern waters, this individual probably strayed from the south.
Tomiyama (1936: 79) reported O.tentacularis (not of Cuvier and Valenciennes) based on two specimens from Taiwan and called them “matsugehaze” in Japanese. Besides the three specimens mentioned above, the syntypes of Gobius tentacularis Cuvier and Valenciennes, and the holotype of G.ophthalmonema Bleeker, were examined morpholog-ically together with many other specimens belonging to O.ophthalmonema or O.tentacularis listed on page 105.
Though Tomiyama (1936: 79) considered that G.ophthalmonema Bleeker is synonymous with his O.tentacularis (not of Cuvier and Valenciennes), the result of the present study revealed that O.ophthalmonema (Bleeker) and O.tentacularis (Cuvier and Valenciennes) are distinguished from each other significantly because of the following reasons. (1) In O.ophthalmonema the upper and lower rims of the upper lip are almost parallel with each other, but in 0.tentacularis the upper lip is constricted at the centre (Fig.2 and Table 2). (2) The spine of the first dorsal fin of 0.ophthalmonema is much longer than that of O.tentacularis in proportion to the standard length (Table 3). (3) The head of O.ophthalmonema is also somewhat longer than that of 0.tentacularis in proportion to the standard length (Table 4). (4) The length of the ascending process of the premaxillary of O.ophthalmonema is shorter, and its articular process is wider and clearly discernible from the ascending process, while the articular process of O.tentacularis has no apex and thus is not clearly distinguishable from the ascending process except for one among five specimens examined (Fig.4 and Table 5).
Reexamination ot two specimens reported by Tomiyama (1936) revealed that they belong to O.ophthalmonema.View full abstractDownload PDF (8281K) -
Seiro Kimura1972 Volume 19 Issue 2 Pages 111-119
Published: September 20, 1972
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSObservations on the spawning behavior of the fluvial dwarf form of masu salmon, Oncorhynchus masou (Brevoort), were made in the Ishido-dani, a tributary of Hitotsuse River in Miyazaki Pref., in the autumn of 1957 and 1969.During the spawning season from the last part of October to the first part of November, the water temperature was 13.5-15.5°C and the spawning act of a female and several males was observed usually in the pool-end.
In the male group the hierarchy of peck-right type is recognized according to their body sizes and the largest one mates with the female.The paired male immediately drives subordinate males away if they attempt to approach the female.The female defends her site from invaders such as males which are smaller than herself or another female which tries to dig the site of the paired female. The feeling and/or crouch (Fig.6 C and D) of the female is thought to be the signal posture that causes courting of males, and when the paired male is in the similar posture, homosexual courtship of another smaller male is occasionally observed.As the female repeats digging movement at the rate of twice a minute, a shallow depression is made in which the oviposition occurs.At the oviposition, 30-100 eggs are shed into the crevices of gravel remained in the center of the depression.In the postspawning stage only the female remains on her redd and she covers the eggs with sand and smaller gravel of the upstream part from the depression. Several hours after the first oviposition, the males appear again near the female which is making another depression at about 20 cm upstream place from the previous one, and they repeat the same acts as they did in the first prespawning stage.The next oviposition is usually observed 25-30 hours after the first one.Three or 4 days are necessary for 2 or 3 times of oviposition.View full abstractDownload PDF (14596K) -
Masao Watanabe1972 Volume 19 Issue 2 Pages 120-124
Published: September 20, 1972
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESS -
Tadashi Kubota, Teruva Uveno1972 Volume 19 Issue 2 Pages 125-128
Published: September 20, 1972
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESS -
Kunio Amaoka, Chikakuni Haruta1972 Volume 19 Issue 2 Pages 129-131
Published: September 20, 1972
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESS -
Masayoshi Hayashi1972 Volume 19 Issue 2 Pages 132-134
Published: September 20, 1972
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESS -
Clifford Ray Johnson1972 Volume 19 Issue 2 Pages 135
Published: September 20, 1972
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESS
- |<
- <
- 1
- >
- >|