Japanese Journal of Ichthyology
Online ISSN : 1884-7374
Print ISSN : 0021-5090
ISSN-L : 0021-5090
Volume 35, Issue 1
Displaying 1-17 of 17 articles from this issue
  • Yoshihiko Machida, Masaru Shiogaki
    1988 Volume 35 Issue 1 Pages 1-6
    Published: May 25, 1988
    Released on J-STAGE: June 28, 2010
    JOURNAL FREE ACCESS
    A new deep-sea fish, Leptochilichthys microlepis, is described based on a single specimen trawled in the Pacific off Aomori Prefecture, northernmost district of Honshu, Japan. This species differs from other members of the genus Leptochilichthys in its higher counts of lateral line scales, 64 vs. less than 55, and vertebrae, 58 (35+23) vs. 47-50 (27-30+18-21). A key to the species of the genus is given.
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  • G. David Johnson
    1988 Volume 35 Issue 1 Pages 7-18
    Published: May 25, 1988
    Released on J-STAGE: June 28, 2010
    JOURNAL FREE ACCESS
    The larvae of Niphon spinosus are described based on seven specimens (4.2mmNL-7.2mmSL) collected in the East China Sea during October and November of 1980-1984. The morphology of these larvae, in particular the elongate third dorsal spine and the configuration of the developing anterior dorsal pterygiophore complex, corroborates the hypothesis that Niphon is a member of the serranid subfamily Epinephelinae. Within the Epinephelinae larval Niphon resemble most closely those of the tribe Epinephelini, but differ in several respects, such as the absence of serrations on the dorsal, pelvic and preopercular spines. Using outgroup comparison as a basis for character polarization, a character analysis demonstrates that it is most parsimonious to hypothesize that Niphon is the sister group of all other epinepheline tribes rather than the sister group of the tribe Epinephelini.
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  • Seishi Kimura, Kingo Tsumoto, Koichiro Mori
    1988 Volume 35 Issue 1 Pages 19-24
    Published: May 25, 1988
    Released on J-STAGE: June 28, 2010
    JOURNAL FREE ACCESS
    Embryonic, larval and juvenile development of the cottid fish, Pseudoblennius percoides were described on the basis of a series of laboratory-reared specimens. The eggs were demersal, adhesive, almost spherical in shape, measuring 1.66-1.82mm in diameter, and with numerous various-sized oil globules. Neighboring eggs adhered to each other to form an egg mass. Hatching occurred between 13 and 16 days after spawning at a water temperature of 15.4 to 16.5°C. Newly hatched larvae measured from 6.5 to 7.3mm, averaging 6.9mm TL, and possessed 40 myomeres. Absorption of the yolk was completed at about 7.5mm TL. Flexion of the notochord started and finished at about 10mm TL and about 14mm TL, respectively. Aggregate numbers of all fin rays were completed at over 16mm TL, when the larvae reached the juvenile stage. The pigment pattern became the same as that of adults in juveniles longer than 25mm TL. Lateral lines were completed at over 44mm TL, when the juveniles attained to the young stage. The early stages of this species were clearly distinguished from those of P. cottoides, and the juveniles of four Pseudoblennius species, i.e. P. percoides, P. cottoides, P. marmoratus and P. zonostigma, could be identified mainly by their pigment patterns.
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  • Izumi Kinoshita, Shinji Fujita
    1988 Volume 35 Issue 1 Pages 25-30
    Published: May 25, 1988
    Released on J-STAGE: June 28, 2010
    JOURNAL FREE ACCESS
    A total of 211 larval and juvenile Nibea mitsukurii (4.0-19.0mm SL) was collected with a small seine in surf zones of Tosa Bay during the period of May 1981 to June 1984. They had morphological characteristics common to the larvae and juveniles of Sciaenidae, but were dis-tinguished from the others by the distribution pattern of melanophores on body and spines at the anterior tip of maxillary. They occurred only in surf zone of Tei out of three locations facing Tosa Bay from middle May to middle August. Temperatures and salinities at the place when they were collected ranged from 21.7 to 29.5°C and from 24.5 to 31.37‰, respectively. Good catches were observed when minute dusts floated abundantly in the surf zone. In past studies using traditional larval nets or minnow-nets in coastal or shallow waters of Tosa Bay, larval and juvenile N. mitsukurii were not reported. It seems that they occur in association with minute dusts in extremely shallow waters such as surf zones.
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  • Hin-Kiu Mok, Stephen Chang-Ming Tsoi, Sin-Che Lee
    1988 Volume 35 Issue 1 Pages 31-39
    Published: May 25, 1988
    Released on J-STAGE: June 28, 2010
    JOURNAL FREE ACCESS
    An electrophoretic investigation of the lactate dehydrogenase isozymes in twelve eutele-ostean species was conducted. Expression of the LDH-C locus and association of the A and B subunits in these fishes is discussed. In Chanos chanos this locus is found prevalent in the liver suggesting a close relation to otophysans. Presence of four iso-spaced A-B polymers in this species is a character different from otophysans which are provided with five iso-spaced A-B tetramers. Absence of tissue specificity of C4 band in all holocentrid species suggests a possible primitive phylogenetic status of this family in the Beryciformes. However, expression of the LDH-C locus provides no strong evidence for the resolution of the phylogenetic positions of the Polymixiidae and the other groups examined.
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  • Maria R. Menezes, Nobuhiko Taniguchi
    1988 Volume 35 Issue 1 Pages 40-46
    Published: May 25, 1988
    Released on J-STAGE: June 28, 2010
    JOURNAL FREE ACCESS
    Genetic divergence and phylogenetic relationships among Nibea mitsukurii, Nibea albiflora, Pennahia argentata, Argyrosomus japonicus, Atrobucca nibe and Larimichthys crocea were investigated by examining the electrophoretic patterns of 14 enzymes. The allele frequencies of 21 loci were estimated to calculate the genetic distances (D). The average D value among the sciaenid species increased in proportion to the level of taxonomic category. Relationships estimat-ed by genetic markers well accorded with those estimated by morphological characters. The 6 sciaenid species were clearly divided into two distinct groups at a D value of 1.41.
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  • Mitsuo Sato, Nobuko Katagiri
    1988 Volume 35 Issue 1 Pages 47-55
    Published: May 25, 1988
    Released on J-STAGE: June 28, 2010
    JOURNAL FREE ACCESS
    The small pit organ of the catfish, Silurus asotus, was examined by electron microscopy. On the basis of their fine structures and positions in the organ, five types of cells were distinguished: 1) receptor cell (RC), 2) granular (supporting) cell (GC), 3) non-granular (supporting) cell (NGC), 4) mantle cell (MC), and 5) channel cell (CC). Both GCs and NGCs were located between the RCs in the sensory epithelium and had similar fine structures except for striking differences in their apical cytoplasm. The GC contained numerous secretory granules and scattered tonofilaments. By contrast, the NGC was characterized by abundant tonofilaments in their apical cytoplasm where only a small number of secretory granules were counted. The NGC always occurred in direct contact with RCs, whereas the GC never did so. The MCs, forming the outermost part of the organ, were characterized by numerous tonofilaments in the cytoplasm and resembled the ordinary epidermal cells in their fine structure. The CCs lined the duct of the organ, and con-tained electron dense cytoplasm and rather degenerative organelles. Presumably the GCs contribute to secretion of the mucous substance to the ampullary lumen, whereas the NGCs deal with nutrition and insulation for the RCs.
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  • Jagdish Ojha, George M. Hughes
    1988 Volume 35 Issue 1 Pages 56-61
    Published: May 25, 1988
    Released on J-STAGE: June 28, 2010
    JOURNAL FREE ACCESS
    Variations in the gross morphology and surface architecture of the gill filaments and secondary lamellae of a freshwater catfish (Rita rita) have been investigated using scanning electron microscopy. Heterogeneity of the gill has been correlated with the distribution of lamellar water-flow at different regions of a gill filament. Higher lamellar water flow (cc/pore/cmH2O/sec) was estimated for the middle region of the filaments. The filaments are covered with epithelial cells whose surface is provided with well-developed microridges. The lamellae are generally covered with microvillous epithelial cells. The variations in surface architecture of the gill filaments and secondary lamellae have been correlated with their probable functions.
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  • Tetsuo Kuwamura
    1988 Volume 35 Issue 1 Pages 62-68
    Published: May 25, 1988
    Released on J-STAGE: June 28, 2010
    JOURNAL FREE ACCESS
    Differences between parental roles of males and females in Haplotaxodon microlepis (Cichlidae) were investigated in Lake Tanganyika, and the early ontogeny and growth of the species were studied in the aquarium. Eggs were mouthbrooded by the female, and it is suggested that small larvae (>9mm in total length) were also mouthbrooded by females though such samples were not collected. Above this size the larvae began to feed, and parents jointly performed mouthbrooding and guarding until the young grew to 25-30mm, nearly 2 months after spawning. Males and females mouthbrooded to the same extent, but when a part of the brood was released, females mainly guarded the released brood and males took the mouthbrooding role. Differences in parentalcare patterns between H. microlepis and other monogamous mouthbrooding cichlids are discussed.
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  • Chikara Kitajima, Gosuke Hayashida, Susumu Yasumoto
    1988 Volume 35 Issue 1 Pages 69-77
    Published: May 25, 1988
    Released on J-STAGE: July 04, 2011
    JOURNAL FREE ACCESS
    Fertilized eggs of Pleuronichthys cornutus were obtained by both artificial fertilization and natural spawning of laboratory-reared fish. The present paper describes in detail the early development of the fish and the rearing methods employed to provide basic information for mass production of this species. Eggs and sperm for artificial fertilization were obtained from adult fish caught in the Ariake Sound, Kyushu in November and December of 1984. Their maturation was successfully induced by intermuscular injection of pituitary homogenate of the silver carp, Hypophthalmichthys molitrix. Fertilized eggs were also obtained in 1985 by natural spawning of a broodstock kept in a tank for a year. Hatched larvae were fed successively with rotifers, Artemia nauplii and the harpacticoid copepod, Tigriopus japonicus and reared for 80 days. Ten thousand young fish of about 33mm TL were obtained in 1984 and 1985 with the survival rate of about 17%. Ten developmental stages were defined on the basis of the morphological characteristics: A) newly hatched to 4 day old larvae, 2.7 to 4.1mm TL (2.6 to 3.9mm NL), yolk sac present; B) 4 to 16 day old larvae, 3.8 to 5.9mm (3.6 to 5.6mm), yolk resorbed, actively feeding on rotifers; C) 15 to 30 day old larvae, 6.3 to 8.3mm (6.0 to 7.9mm), notochord straight, hypural fin ray visible; D) 24 to 40 day old larvae, 6.7 to 9.2mm (6.4 to 8.8mm), caudal notochord upturned (45°); E) 28 to 45 day old larvae, 7.9 to 10.8mm (7.5 to 10.3mm), caudal notochord upturned (45°-90°); F) 32 to 50 day old larvae, 10.8 to 15.7mm (8.8 to 12.8mm BL), eyes symmetrical; G) 35 to 66 day old larvae, 13.4 to 20.0mm (10.9 to 16.3mm), eyes asymmetrical, but left eye not visible from the right side; H) 40 to 75 day old larvae, 13.8 to 26.2mm (11.3 to 21.4mm), the upper edge of left eye visible over top of the head from the right side; I) 46 to 89 day old larvae, 20.1 to 27.4mm (16.4 to 22.4mm), left eye on the edge of the head and pupil visible from the right side; and J) juveniles of 51 day old or over, 23.6mm or more (19.3mm or more), metamorphosis completed. One to three inflections were found for relative growth of total length, eye diameter, upper jaw length, preanal length, and distance between the base of the pectoral fin and the anus against the notochord length or body length. Two inflections were found for body length (or notochord length)-body weight relationship.Most inflections appeared at the stages of D, F and J, corresponding to the body length of 8, 9-12 and 18-22mm respectively.
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  • Yoshihiko Machida, Osamu Okamura, Suguru Ohta
    1988 Volume 35 Issue 1 Pages 78-82
    Published: May 25, 1988
    Released on J-STAGE: June 28, 2010
    JOURNAL FREE ACCESS
  • Toshio Okazaki, Yonemitsu Tanaka, Hiroshi Naganuma
    1988 Volume 35 Issue 1 Pages 83-86
    Published: May 25, 1988
    Released on J-STAGE: June 28, 2010
    JOURNAL FREE ACCESS
  • Kiyotaka Hatooka
    1988 Volume 35 Issue 1 Pages 87-89
    Published: May 25, 1988
    Released on J-STAGE: June 28, 2010
    JOURNAL FREE ACCESS
  • Kuei-Chiu Chen, Hin-Kiu Mok
    1988 Volume 35 Issue 1 Pages 90-97
    Published: May 25, 1988
    Released on J-STAGE: June 28, 2010
    JOURNAL FREE ACCESS
  • Atsushi Suzuki, Yasuhiko Taki, Mitsuo Takeda, Sumito Akatsu
    1988 Volume 35 Issue 1 Pages 98-101
    Published: May 25, 1988
    Released on J-STAGE: June 28, 2010
    JOURNAL FREE ACCESS
  • Atsushi Suzuki, Mitsuo Takeda, Hideyuki Tanaka, Myong Suk Yoo
    1988 Volume 35 Issue 1 Pages 102-104
    Published: May 25, 1988
    Released on J-STAGE: June 28, 2010
    JOURNAL FREE ACCESS
  • 1988 Volume 35 Issue 1 Pages 113
    Published: 1988
    Released on J-STAGE: June 28, 2010
    JOURNAL FREE ACCESS
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