• Journal of the Korean Society of Fisheries and Ocean Technology
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• v.36 no.3
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• pp.222-233
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• 2000

A methodology for determining age by otolith of small yellow croaker, Pseudosoiaena polyactis Bleeker, was developed. A thin section method was chosen to be suitable for age determination because the otolith had a three-dimensional shape and thus it was not possible to read the otolith rings on the surface. The clear rings were identified on the vertical-axis cross-sectioned otoliths. The total length-total weight relationship and the growth parameters were estimated with error structure to endow with accuracy. In the relationship between total length and total weight, a multiplicative error structure was assumed because variability in growth increased as a function of the length, and the estimated equation was $W=0.0049L^{3.2153}$. The variability in growth was constant as a function of the age, revealing an additive error structure. The von Bertalanffy growth parameters were obtained from a nonlinear regression as $L_{\infty}= 37.11cm, K=0.20/yr and t_0=-1.88.$

• 한국해양학회지
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• v.23 no.1
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• pp.41-52
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• 1988

Eleven of 52 species were relatively abundant in the mesopelagic and upper bathypelagic layers in the Rockall Trough and Porcupine Seabight. The fish belonging to the families Gonostomatidae, Myctophidae and Sternoptychidae were the most abundant. During the daytime most members of these three family groups occurred in the depth of 300-900m. Over this depth range gonostomatids and sternoptychids were almost mutually exclusive while gonostom$\grave{a}$tids and myctophids showed much greater overlap, as did myctophids and sternoptychids. During the night the distribution of these three families were relatively well separated, myctophids occurring in the surface 100m, sternoptychids at 200-500m and gonostomatids at 500-900m. Generally vertical pattern in the number of species in both areas was similar through day and night with the highest number occurring at 500-900m. The numerical abundance in the epipelagic layer was greater at night than during the daytime, while it was greater in daytime in the upper mesopelagic layer. There was no great diel change in the lower mesopelagic layer. Most of diel migrators in the upper layers of waters at night appear to be mainly from the upper mesopelagic layer. In some species larger individuals tend to occur in the deeper water than smaller ones, suggesting habital segregation with size.

• Korean Journal of Plant Taxonomy
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• v.42 no.1
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• pp.80-90
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• 2012

While preparing a floristic study of Korean hepatics, we discovered the following 10 unrecorded species from Mt. Jiri-san (maximum height, 1,915 m) and Mt. Seorak-san (maximum height, 1,708 m): Neotrichocolea bissetii (Mitt.) S. Hatt., Calypogeia angusta Steph., Cephaloziella massalongii K. Mller, Harpanthus scutatus (F. Weber & D. Mohr) Spruce, Plectocolea torticalyx (Steph.) S. Hatt., Anastrophyllum michauxii (F. Weber) H. Buch, Lophozia excisa (Dicks.) Dumort., Lophozia lantratoviae Bakalin, Mylia verrucosa Lindb., Scapania sphaerifera H. Buch. They are distributed near streams and/or on the top of a ridge on Mt. Jiri-san and Mt. Seorak-san.

• Korean Journal of Ichthyology
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• v.23 no.1
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• pp.80-84
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• 2011

Redescription of the Hawaiian ladyfish Elops hawaiensis was carried out based on four specimens collected from Busan and Gwangyang between 2008 and 2010. This species has a gular plate between the symphysis and isthmus, and the entire premaxillary tooth band is exposed when the mouth is closed. Our Korean specimens of E. hawaiensis are characterized by having 65~67 vertebrae, 14 anal fin rays and 95~101 lateral line scales, which values differed slightly from those given in previous studies. Molecular analysis using 4S0 base pairs of mitochondrial DNA cytochrome b sequences showed that our four specimens corresponded well with E. hawaiensis (99.8~100.0%). Therefore, our results suggest that there may exist regional differences in vertebrae and anal fin ray counts for E. hawaiensis.

• Korean Journal of Ichthyology
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• v.29 no.4
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• pp.272-276
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• 2017

This is the first report of Cantherhines pardalis (Tetraodontiformes: Monacanthidae) from Korea. A single specimen (105.4 mm in SL) was collected from the coastal waters of Busan by gill net on 20 June, 2012. This species is characterized by having the following morphological traits: II, 34 dorsal fin rays; 31 anal fin rays; 13 pectoral fin rays; caudal peduncle without large spines; spine row on the lateral side of first dorsal spine distinct; posterior end of pelvic with encasing scales distinctly more protruding than ventral flap. This species is similar to C. dumerilii except for the number of spines on caudal peduncle (none in C. pardalis vs. two pairs in C. dumerilii). Based on morphological and molecular approaches, the specimen was identified as C. pardalis. We add C. pardalis to Korean fish fauna and propose the new Korean names "Yuk-gak-mu-nui-jwi-chi" for the species.

• Korean Journal of Plant Taxonomy
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• v.32 no.4
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• pp.363-382
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• 2002

Morphological characters of three taxa belonging to three genera (Fuirena, Kobresia, and Scleria) in Korean Cyperaceae were reexamined. The anatomical patterns of stems and leaves, and epidermal patterns of achenes and leaves were investigated by a scanning electron microscope (SEM) and a light microscope (LM). Based upon the results, the scientific and Korean names, which have not been clearly established, were reviewed. Morphological characters such as length and width of stem, leaf, bract, scale, achene, and shape of achene, spikelet, style base, scale, perianth, and anatomical characters such as shape of stem and leaf, shape of achene epidermal cell and silica body of leaf, size and frequency of stomatal complex, presence of bulliform cell were useful for an identification of the three taxa.

• Korean Journal of Plant Taxonomy
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• v.43 no.3
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• pp.171-180
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• 2013

Two newly recorded species, Cyrtomium laetevirens and Dryopteris simasakii var. paleacea (Dryopteridaceae) were collected from forests in Jeonnam, Geongnam and Jeju-do, with the latter also, found addedly in Gwanaksan, Seoul. C. laetevirens (vernacular name: 'Yun-soe-go-bi) was distinguished from other Korean congeners of the genus Cyrtomium by having glossy laminae, narrow lanceolate, yellow-green pinnae with minutely serrated margin and gradually narrowing shape from base to apex, along with entire, unicolor, and white grayish indusia. D. simasakii var. paleacea (vernacular name: Cheung-cheung-ji-ne-go-sa-ri'), was distinguished by shining leaves, opposite pinnae arrangement, no falcate pinnules, and densely adpressed scaly wholly along with irregular dark brown scales on stipe and rachis. Descriptions and illustrations of the two taxa and their photographs in the habitat are provided along with a key to the species of Cyrtomium and sect. Hirpedes of Dryopteris from Korea.

• Journal of the Korean Society of Fisheries and Ocean Technology
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• v.25 no.4
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• pp.200-208
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• 1989

To the purpose of preparation for investigating aspect of material that not revealed by the light microscope and extending our knowledge in applicable field, a scanning acoustic microscope system of 200MHz was organized and appraised its performance with experiments. Professor N.CHUBACHI in Tohoku University in Sendai, Japan provided the ZnO transducer with lens. The system for transmitting and receiving ultrasonic pulses of 200nsec was organized with a rectangular audio wave generator for modulation of 200MHz carrier wave, gating system for transmitting and receiving, mixer for converting intermediate frequency, a directional coupler, ZnO transducer, radio frequency amplifiers. detecter and personal computer. The Scanning system was driven in micro steps with three stepping motors in the direction of x, y and z axes. The system was a reflecting type scanning acoustic microscope and the operation program processed graphics data from receiving echo intensities. Photograph of fish scale obtained by optical microscope was compared with its image by the scanning acoustic microscope organized here. The result was satisfiable.

• Korean Journal of Ichthyology
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• v.10 no.2
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• pp.216-230
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• 1998

The taxonomic review of the family Platycephalidae from Korea was made based on the morphological characteristics of specimens collected in the Korean coasts from December 1987 to April 1998. The family Platycephalidae from Korea was classified into 10 species belonging to 7 genera: Onigocia macrolepis, O. spinosa, Rogadius asper, Suggrundus meerdervoorti, lnegocia japonica, I. guttata, Cociella crocodila, Ratabulus megacephalus, Platycephalus indicus and Platycephalus sp. Of them, Onigocia macrolepis was recorded for the first time in Korea and Platycephalus sp. was demanded to recheck its taxonomic position comparing with other Asian specimens in future. A new key to the genera and species of the family Platycephalidae from Korea was reported, with description of their morphological characteristics and distribution.

• Korean Journal of Ichthyology
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• v.20 no.2
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• pp.90-96
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• 2008

The histological morphology on the skin of Misgurnus anguillicaudatus was described in the three regions such as dorsal, lateral, occiput and subsequently morphological variations of the skin were monthly observed for a year. The skin consisted of epidermis having epithelial cell, club cell and mucus cell, and dermis of mainly connective tissue fiber, embedded scale and blood capillary. Unicellular mucus cells situated at the epidermis underwent seasonal change in its size, as well as number and amounts of mucus-secreting materials, which they greatly increased in winter, but did not in summer. As it is getting cold, the mucus cells' shape changed from initial spherical to oval or elongated form. Such considerable changes in the mucus cell were particularly most evident in the occiput during winter. Moreover, the dermis largely thickened about 2~3 times in winter than in summer. Based on these results, we discussed function for the mucus on what it mainly acts in nature and information on whether mucus cells' seasonal variations affect on hibernation and cutaneous respiration.