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Volume 26, Issue 1
Displaying 1-12 of 12 articles from this issue
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Eiichi Fujii, Teruya Uyeno1979 Volume 26 Issue 1 Pages 1-10
Published: June 15, 1979
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSPolyplacapros tyleri, which belongs to the subfamily Aracaninae of the family Ostraciidae, is described as a new genus and species.The fish were taken off eastern Australia at a depth of 79-161 meters by a bottom trawler.The species can easily be distinguished from related forms by its fusiform body and long caudal peduncle, almost completely covered with bony plates.Polyplacapros is closely related to the genus
Kentrocapros.View full abstractDownload PDF (9548K) -
Stuart G. Poss, William N. Eschmeyer1979 Volume 26 Issue 1 Pages 11-14
Published: June 15, 1979
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSProsoproctus pataecus, a new aploactinid scorpaenoid taken from coarse coral and sand bottoms at depths of 69-84 m on MacClesfield Bank in the South China Sea, is des-cribed and figured from two specimens 20.6 and 19.9 mm in standard length.This species is unique among scorpaenoid fishes in having the anus positioned far forward, under the head, immediately behind the pelvic fin base.Like species of the subfamily Bathyaplo-actininae, it has tubed anterior nostrils far forward on the snout, relatively elongate and spatulate preorbital and preopercular bones, and modified scales that have a central spine that is strongly curved posteriorly.Unlike bathyaploactinines, it does not have restricted gill slits.View full abstractDownload PDF (667K) -
John E. Randall, L.A. Maugé, Yves B. Plessis1979 Volume 26 Issue 1 Pages 15-25
Published: June 15, 1979
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSTwo anthiine fishes of the genus Holanthias from moderately deep water are described as new: H.katayamai and H.tapui. Both have been identified previously as Scalantarus chrysostictus (Günther). H.katayamai, known from Guam and southern Japan, is distinctive in its deeply emarginate caudal fin with broadly rounded lobes, lack of elon-gate dorsal spines, but with greatly prolonged third dorsal, second anal and second pelvic rays.H.tapui is described from two specimens from Tahiti and one from the Cook Islands; it is closely related to the Indonesian species H.chrysostictus, differing principally in its longer and more lunate caudal fin, higher gill-raker count, and in coloration.View full abstractDownload PDF (4863K) -
Chetsung Chen, Toru Taniuchi, Yukio Nose1979 Volume 26 Issue 1 Pages 26-42
Published: June 15, 1979
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSSqualus blainville (Risso) is described for the first time from Japan.Two closely allied species, S.mitsukurii Jordan et Fowler and S.japonicus Ishikawa, are redescribed and reviewed to clarify the classification of the genus Squalus in Japan.The three species are separable by a combination of differences in snout length, mouth width, dorsal fin height, dorsal fin spine length, and vertebral counts.View full abstractDownload PDF (2423K) -
Harumi Sakai, Morizumi Nakamura1979 Volume 26 Issue 1 Pages 43-54
Published: June 15, 1979
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSSicyopus leprurus and Lentipes armatus are described as new species of the Sicy-diaphiinae, Gobiidae, from a hill stream on Ishigaki Island, Ryukyu Islands, Japan.They are distinguishable from other species of each genus mainly in their squamation.Morphological comparison of four genera and six species of hill-stream sicydiaphiine gobies suggests that Sicyopterus is the highest and Sicyopus is the lowest in the degree of adapta-tion to torrential environments, Lentipes and Stiphodon are intermediate between Sicyopterus and Sicyopus.View full abstractDownload PDF (5024K) -
John E.Randall, Fujio Yasuda1979 Volume 26 Issue 1 Pages 55-61
Published: June 15, 1979
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSThe pomacanthid fish Centropyge shepardi is described from specimens collected on reefs in the Mariana and Ogasawara (Bonin) Islands in the depth range of 10 to 56m.It most closely resembles the wide-ranging Indo-Pacific Centropyge bispinosus, sharing with it similar color, morphometric, and meristic data.It differs in having modally 17 instead of 16 pectoral rays, a slightly instead of strongly rounded caudal fin, and more lightly pig-mented median fins.In life it lacks the wash of blue over the head and median fins and a blue-edged orange-red spot at the pectoral base.View full abstractDownload PDF (3021K) -
Kenji Mochizuki1979 Volume 26 Issue 1 Pages 62-68
Published: June 15, 1979
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSAge and growth of the two Japanese representatives of the Scombropidae, Scombrops boops and S.gilberti, were examined by means of otolith reading.Examination of the marginal growth of the otolith showed the availability as annual rings of the outer margins of hyaline zones formed in the period from November to January.Growth of the two species was expressed by the von Bertalanffy's equation based on the estimation of standard lengths at the time of annual ring formation.As a result, it was revealed that S.gilberti is larger than S.boops in standard length up to two years of age, and then S.boops be-comes larger than S.gilberti.The estimated maximum standard length is 880 mm for S.boops and 514 mm for S.gilberti.Growth of S.boops estimated from length composition agreed well with that based on the otolith reading.Growth in terms of body weight was also examined.View full abstractDownload PDF (2327K) -
Interspecific Variations in the Circadian Rhythm of Bimodal Oxygen Uptake in Four Species of MurrelsJyoti S. D.Munshi, Ajoy K. Patra, Niva Biswas, Jagdish Ojha1979 Volume 26 Issue 1 Pages 69-74
Published: June 15, 1979
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSStudies of bimodal oxygen uptake in four species of murrels, genus Channa, at different periods of the 24 h day regime showed distinct circadian rhythm in their metabolism.The metabolism of the four species remained higher in the period extending from dusk (16: 00-18: 00) to dawn (04: 00-06: 00).C.marulius showed the highest 02 uptake (66.4±0.5ml O2 kg-1.h-1) duringmidnight (24: 00-02: 00) , C.striatus (78.7±18.6) and C.gachua (95.6±2.6) during early parts of the night (20: 00-22: 00) and C.punctatus (57.5±1.1) during dusk (16: 00-48: 00).Of the total oxygen uptake, C.marulius, C.striatus, C.gachua and C.punctatus extracted about 84.5%, 67.7%, 53.4% and 86.8% of oxygen through aerial routes respectively.In all the species the lowest or the second lowest rate of oxygen uptake was recorded at noon, and during this period gill breathing dominated over aerial breathing in C.striatus and C.gachua. The circadian rhythm of their oxygen uptake has been correlated with the diurnal fluctuation of metabolism of the swamp ecosystem.A general metabolic wheel hypothesis has been postulated.View full abstractDownload PDF (890K) -
Mitsuo Sato1979 Volume 26 Issue 1 Pages 75-83
Published: June 15, 1979
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSFrom differences in size and cytoplasmic features, the mucous cells of two cottids, Pseudoblennius cottoides and Furcina sp., are divided into two distinct types, i.e.small and large mucous cells.The fine structure of these two types, however, shows no gross differences between the two species.As in the majority of mucous cells, small mucous cells possess well-developed rough-surfaced endoplasmic reticula and a considerable number of Golgi complexes, and thus mucogenesis of these cells seems to be performed by cooper-ation of the above-mentioned two organelles.Large mucous cells, contrary to the former type, have no well-developed rough-surfaced endoplasmic reticula, but a number of Golgi complexes and an abundance of mitochondria.Accordingly, formation of mucous droplets in large mucous cells is conjectured to be carried out by somewhat different process from that of small mucous cells.In this case, Golgi complexes probably have the most im-portant role.The presence of desmosomal attachments between the large mucous cells and adjacent filament-containing cells may be noticeable.The contents of these two types of mucous cells seem to be not very different from each other.The skin epidermis of the present two cottids is endowed with sacciform granulated cells in addition to the above-mentioned two secretory glands.View full abstractDownload PDF (16713K) -
Shojiro Fukui1979 Volume 26 Issue 1 Pages 84-88
Published: June 15, 1979
Released on J-STAGE: February 23, 2011
JOURNAL FREE ACCESSWhen Sicyopterus japonicus, an amphidromous goby, encounters rapids or waterfalls, it often leaves the water and climbs the rocks to bypass such obstacles.The rock-climbing of this fish is achieved by movement of the jaws and pelvic disc.When it advances on the rock its upper jaw is extended in an anteroventral direction sucking onto the rock by the inner side of the upper jaw.The pelvic disc also serves as a sucker.Then the upper jaw is constricted, thus the fish climbs even an overhanging surface by a single projection of the upper jaw.The structure of its mouth part is specialized, and the mech-anism of rock-climbing movement differs from that of other mountain-stream gobies in which the rock-climbing is performed by the sucking disc and rapid strokes of the tail.View full abstractDownload PDF (5785K) -
Tetsuji Nakabo, Akihisa Iwata1979 Volume 26 Issue 1 Pages 89-93
Published: June 15, 1979
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSGray (1835) recorded Anaora tentaculata from Amboina, Indonesia, giving only three figures (lateral and dorsal views, and pectoral fin) without description.One male and four females, which are identical with this species, were collected during the years 1974-1977 from the coral sandy bottom of Kabira Bay, Ishigaki Island, Okinawa Prefecture, Japan.Diagnostic characters of the male specimen agree well with Gray's figures.Since this species is new to Japan, we here describe our specimens and compare them with specimens from the Philippines.View full abstractDownload PDF (671K) -
Kazuko Hosokawa1979 Volume 26 Issue 1 Pages 94-99
Published: June 15, 1979
Released on J-STAGE: July 04, 2011
JOURNAL FREE ACCESSThe micropyle apparatus of eggs in the medaka, Oryzias latipes, was observed by scanning electron microscope.During the breeding season mature ova were fixed with 2.5%glutalaldehyde and 1%osmic-tetroxide for 1 hour each.After dehydra-tion with graded ethanol, the samples were dried with critical point drying, coated with platinum-palladium with ion sputtering, and studied with scanning electron microscope.The micropyle apparatus of unfertilized ovum in the medaka is composed of five or six spiral layers, becoming hollow in the central part.After fertilization, the cavity of micropyle was filled with a cluster of spherical substance.This substance increased over time.View full abstractDownload PDF (19397K)
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