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Volume 25, Issue 3
Displaying 1-12 of 12 articles from this issue
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John W. Shepard, Katherine A. Meyer1978 Volume 25 Issue 3 Pages 159-164
Published: December 15, 1978
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSA new labrid fish, Macropharyngodon moyeri, is described from the Izu Islands, Japan. The new species differs from M. kuiteri Randall principally in coloration, and from all other known species of the genus in its atypical dentition and greater number of dorsal and anal fin rays.View full abstractDownload PDF (4593K) -
John E. Randall, Phillip C. Heemstra1978 Volume 25 Issue 3 Pages 165-172
Published: December 15, 1978
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSSerranocirrhitus latus Watanabe and Isobuna japonica (Steindachner), both described as new genera and species of Cirrhitidae, are shown to be serranid fishes of the subfamily Anthiinae. S.latus is regarded as a valid genus and species; Dactylanthias mcmichaeli Whitely is a junior synonym. I.japonica is revealed as an earlier name for a species currently identified as Sayonara satsumae Jordan et Seale.The genera Isobuna Jordan and Sayonara Jordan et Seale are placed in the synonymy of Plectranthias Bleeker. S. latus and P. japonicus are redescribed. S. latus is now known from the Ryukyu Islands, Lihou Atoll and Willis Island in the Coral Sea, Palau Islands, Fiji Islands, New Caledonia, Loyalty Islands, New Hebrides, and Celebes. The range of P.japonicus is extended from Japan to Luzon.View full abstractDownload PDF (3997K) -
Sho Tanaka, Masako Hara, Kazuhiro Mizue1978 Volume 25 Issue 3 Pages 173-180
Published: December 15, 1978
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSFine structure in every stage of spermatogenic cells of the squalen shark, Centrophorus atromarginatus Garman, from Suruga Bay was observed by means of an electron microscope. Selachian spermatogenesis, as in other vertebrates, consists of two periods, spermiocytogenesis and spermiohistogenesis. The former is similar to that of mammalians but different from that of teleost fishes. While the latter has special characteristics compared to other vertebrates, especially in the form of mature spermatozoon. These two periods of selachian spermatogenesis are discussed in comparison with mammalians, reptilians, amphibians and teleost fishes.View full abstractDownload PDF (17126K) -
Kazuyuki Teshima, Mukhtar Ahmad, Kazuhiro Mizue1978 Volume 25 Issue 3 Pages 181-189
Published: December 15, 1978
Released on J-STAGE: February 23, 2011
JOURNAL FREE ACCESSThe Telok Anson shark, Scoliodon laticaudus, which is distributed in rivers and lakes in Indonesia and Malaysia was collected and the reproductive biology in both male and female was examined. Reproductive activity takes place throughout the year. The male S.laticaudus is estimated to reach maturity at about 330 mm in total length based on condition in the testis, seminal vesicle and clasper. The female S.laticaudus has two functional ovaries. Oocytes are lined by a single layer of follicular cells. A mature egg is small and its size at ovulation is about 1mm in diameter. A fertilized egg is covered with a gelatinous substance, and has cilia at both sides. Yolk does not exist in the foetal placenta even in the early gestation, and capillaries are well developed in tissues inside the foetal placenta. The embryo is nourished by the placenta from the earliest stage of gestation. The umbilical stalk contains only an artery and a vein. There is no ductus vitellointestinalis. The umbilical stalk has many appendiculae, whose epithelia absorb nutrition from the uterine fluid. The size at sexual maturity in the female is estimated to be about 325-350mm in total length.View full abstractDownload PDF (8449K) -
Y.R. Malhotra, M.K. Jyoti, Kadambri Gupta1978 Volume 25 Issue 3 Pages 190-196
Published: December 15, 1978
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSThe ovarian cycle and spawning season of Ophiocephalus punctatus from Jammu, India, a subtropical area, is described. The oocyte shows six well differentiated stages of maturation and the fish has a prolonged spawning season extending from May to August.The spawning tends to be bimodal in character.
The stages in the formation of the yolk nucleus of Balbiani are described and the probable origin of this cytoplasmic inclusion is discussed.View full abstractDownload PDF (5133K) -
Fumio Kato1978 Volume 25 Issue 3 Pages 197-204
Published: December 15, 1978
Released on J-STAGE: February 23, 2011
JOURNAL FREE ACCESSMorphological and ecological studies on two forms of Oncorhynchus rhodurus Jordan et McGregor living in Lake Biwa and adjoining inlets were conducted. The fluviatile form (the amago) and the lacustrine form (the biwamasu) showed morphological differences in number of pyloric caeca, transverse scales, ventral fin rays and red spots on lateral body. The fluviatile form lives in the upper waters of inlets to Lake Biwa, but the lacustrine form leaves the streams as fry and lives in Lake Biwa almost all its life. In addition to this, there are ecological differences in maturity age, growth rate and food habits between the two forms. It is presumed that the fluviatile form and the lacustrine form living in this lake and adjoining inlets consist of different populations.View full abstractDownload PDF (3667K) -
Akira Ochiai, Takeo Ikegami, Yasushi Nozawa1978 Volume 25 Issue 3 Pages 205-210
Published: December 15, 1978
Released on J-STAGE: July 04, 2011
JOURNAL FREE ACCESSThe leptocephali of Conger japonicus Bleeker are shallow-bodied, reaching125.5mm in standard length at the fully grown stages.The larvae are similar to those of C.myriaster (Brevoort) in general appearance and meristic characters except that they have a more slender body but do not have any conspicuous black spots on the midlateral body side.The developing leptocephali, longer than64mm, can be divided into two stages by the dentition and body size, and the meta-morphosing leptocephali, into five stages by the dentition, position of the origin of dorsal and anal fins, pigmentation and body size.The present study shows that metamorphosing leptocephali occur mainly from August to November.View full abstractDownload PDF (844K) -
Kaneyoshi Yamashita1978 Volume 25 Issue 3 Pages 211-215
Published: December 15, 1978
Released on J-STAGE: July 04, 2011
JOURNAL FREE ACCESSIn order to clarify the mechanism of osmoregulation of the larval red seabream Pagrus major (Temminck et Schlegel), chloride cells of the larvae were observed from immediately after hatching to 15 days using the silver staining technique.Numerous silver-stained cells, round or elliptical in shape and 7.5-14.9 μ in diameter, were noticed as black small bodies on the whole integument of larvae.The cross section indicated that these cells were found within the epithelium.The central part of silver-stained cells was more blackly stained, where a lip or rent-like structure was found as an orifice.The network binding the silver-stained cells was also observed on the body surface.
The fluctuation of the number of silver-stained cells with different developmental stages was summarized as follows: The cells were already found on the all body surface in larvae im-mediately after hatching.Silver-stained cells increased in number up to 5 days, then decreased after about 8 days, and disappeared around 15 days after hatching.
Silver-stained cells are likely to be chloride cells, according to previous findings.If this assumption is true, seabream larvae are provided with chloride cells in the epithelium of the skin to regulate osmotic pressure.View full abstractDownload PDF (8467K) -
Masao Katayama1978 Volume 25 Issue 3 Pages 216-218
Published: December 15, 1978
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSI have recently examined six small anthi-ine fish obtained off Hachijo Island and another specimen on the coast of Izu Penin-sula. They seem referable to Leptanthias kashiwae Tanaka (1918), a species in which only the holotype has hitherto been known. Katayama (1960) regarded the species as a synonym of Pseudanthias taeniatus (Klunzinger), however, he examined no material. Because of the rather scanty morphological informa-tion so far available on the species, a full description is made, based on the material presently examined. Sexual dimorphism and posible protogynous hermaphroditism are also discussed.View full abstractDownload PDF (495K) -
Akira Zama1978 Volume 25 Issue 3 Pages 219-222
Published: December 15, 1978
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSWhen Masuda (1942) reported a grouper as Epinephelus fasciatus albopunctulatus Boulenger, 1895, he noted that the original description of E. albopunctulatus differed from his specimen in having a long second dorsal spine and white spots on the body. He regarded the long dorsal spine as owing to an abnormal individual and the white spots as caused by preservation in alcohol. However, Katayama (1957) described E. truncatus, designating E. fasciatus albo-punctulatus of Masuda (1942) as a synonym of it.View full abstractDownload PDF (525K) -
Toru Takita1978 Volume 25 Issue 3 Pages 223-226
Published: December 15, 1978
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSIn Japan, reliable records of Coilia are confined to Ariake Sound in western Kyushu and rivers which flow into the sound.Two species of the genus, C.mystus (Linnaeus, 1758) and C.ectenes Jordan et Seale, 1905, have been previously recorded from Ariake Sound (Yoshida, 1935; Uchida and Tsukahara, 1955) and the Yabe and Chikugo Rivers (Tsukahara, 1951). However, Takita (1967a, b) has reported that only one species of the genus inhabits Ariake Sound in-cluding the lower Chikugo River. Its characters differ from either of the two species reported earlier, but species identification was not con-firmed.
In this study, the type specimens of C.nasus and C.ectenes were re-examined, and the former was compared with the characters of C.mystus and C.ectenes, confirming that the species in Ariake Sound is C.nasus.The occurrence of C.nasus in China, Korea, and adjacent waters is also reviewed here.View full abstractDownload PDF (552K) -
Hajime Ishihara, Akira Zama1978 Volume 25 Issue 3 Pages 227-229
Published: December 15, 1978
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSThree specimens of a labrid fish, Xyrichtys pentadactylus (Linnaeus), were collected in our recent investigation of the shore fishes of the Ogasawara (Bonin) Islands.In view of the scanty information on the species from Japanese waters, a full description is made of the above material.The presence of one or two black spots between the 3rd and 5th dorsal spines has not been mentioned in former studies, so far as we are aware.View full abstractDownload PDF (2258K)
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