• Korean Journal of Ichthyology
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• v.22 no.3
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• pp.206-209
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• 2010

A specimen of Redigobius bikolanus (29.0 mm SL) belonging to the family Gobiidae was collected by a hand net from the estuary of Changgo-cheon (river) in Andeok-myeon, Jeju Island, Korea. This specimen was characterized by having 26 lateral line scales, 7 predorsal scales, 7 transverse scales, anterior oculoscapular canal, preopercular canal, and four black spots between origin of anal fin and lower origin of caudal fin. The morphological characteristics of the specimen well matched those of Redigobius bikolanus previously reported. Thus, we newly add this species to the list of Korean fish fauna and propose its new Korean name, "Jeom-bak-i-mang-duk".

• Korean Journal of Ichthyology
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• v.31 no.4
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• pp.255-258
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• 2019

Fifteen gobids specimens first collected from the southern coastal waters of Tongyeong, Gyeongsangnam-do, were identified as the Suruga fundicola from Korea. The species, representing a new Korean record, is characterized by having VII-I, 16~17 dorsal fin rays, I, 15~16 anal fin rays, 37~42 lateral line scales, notably large eye and narrow interorbital space, scaleless cheek and opercle, no babel, teeth rather strong, and 6~7 dusky spots on sides. A new Korean name, "Keun-nun-mangduk-sok" and "Keun-nun-mang-duk" is proposed for the genus and species, respectively.

• Korean Journal of Ichthyology
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• v.23 no.4
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• pp.269-277
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• 2011

Age and growth pattern of Pacific cod Gadus macrocephalus were determined using samples collected in Jinhae Bay in Korea during the spawning period from 2006 to 2009. The ages of 333 specimens were estimated using their otoliths. The reliability of scales as a means of age determination was analyzed by comparing the ages estimated from otoliths and scales of 96 specimens. The scales collected from the base of the second dorsal fin or from the caudal peduncle were proved to be suitable for age determination of Pacific cod. Monthly changes in the marginal index in otoliths decreased from December showing the lowest value in February. Ages ranged from 4 to 6 years for both females and males, and most of them were 6 years old. Relationships between the otolith radius (R) and total length (TL) were TL=10.4R+3.1 for males, and TL=11.5R+3.4 for females. The growth curves in total length ($L_t$, cm) were expressed as $L_t$=141.5 [1-exp{-0.089 (t+0.209)}] for males and $L_t$=127.5 [1-exp {-0.124 (t+0.077)}] for females.

• Korean Journal of Plant Taxonomy
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• v.32 no.3
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• pp.257-292
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• 2002

Morphological characters of sections Foetidae(one taxon), Arenariae(one taxon) and Multiflorae(six taxa) of genus Carex(Cyperaceae) were reexamined. The epidermal patterns of perigynium, achene and leaf were investigated using by a scanning electron microscope(SEM) and a light microscope(LM). Morphological characters, such as length and width of stem, leaf, leaf sheath, bract, spike, scale, perigynium and beak of perigynium, length of spike peduncle, size and frequency of stomatal complex of leaf, number of bract, shape of stem transection, scale and apex of scale, beak and base of perigynuim, achene, epidermal cell and cell wall of perigynium, achene, leaf epidermal patterns(fundamental epidermal cell and cell wall, silica body, subsidiary cell), hair, papillae present/absent of perigynium, and leaf were useful for the identification of observed eight taxa. According to the current study, examined eight taxa of sections Foetidae, Arenariae and Multiflorae were distinct from each other with respect to length and width of stem, leaf, bract, perigynium, perigynium beak, length of spike peduncle, shape of bract, scale and apex of scale, perigynium, perigynium beak, hair presence/absence of perigynium and leaf. A key based on data was presented here.

• Korean Journal of Ichthyology
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• v.35 no.2
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• pp.129-135
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• 2023

The diet composition of skinnycheek lanternfish, Benthosema pterotum were collected by bottom trawl net in the South Sea of Korea during 2021 (February, May, August, and November) and 2022 (February, April, August, and November). The size of the specimens ranged from 16 to 73 mm in total length. B. pterotum were mesopelagic carnivores that mainly consumed euphausiids and copepods. Its diets included small quantities of amphipods, shrimps, mysids, etc. We calculated the trophic level as 3.16 for B. pterotum. The individuals of small size class (<40 mm) fed mainly on copepods. In the next size classes (40~45 mm, 45~50 mm, 50~55 mm), copepods' proportion decreased and euphausiids increased. In the largest class (55~60 mm and ≥60 mm), the proportion of euphausiids' decreased, and shrimps increased. As the body size of B. pterotum increased the mean weight of prey per stomach (mW/ST) tended to significantly increase (One-way ANOVA, P<0.05).

• Korean Journal of Ichthyology
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• v.32 no.4
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• pp.210-221
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• 2020

Since the introduction of Israeli carp into Korea for farming in 1973, there are no breeding studies on developing Korea Israeli carp (domestic) so far. This study performed gene-based cross-breeding studies to restore genetic diversity of lowered Israeli carp through continuous inbreeding, and for rapid growth and better scales. This study produced four cross-breeding groups (F1) using Koean Israeli carp and Chinese Songpu mirror carp for the improvement of growth and scale of Israeli carp in Korea. And mating scheme for breeding groups was set in consideration of the morphological analysis and genetic distance of broodstock. In addition, this study used microsatellite markers and genotype data to analyze genetic diversity and parentage analysis. As a result, the average N_A and H_E values of Korean select broodstock are 8.3 and 0.743, and F1 is 13.0 and 0.764. This study shows that the genetic diversity of F1 has been recovered over Korean Israeli carp through breeding between Korean Israeli carp and Chinese Songpu mirror carp. Common Israeli carp in Korea reached 1.7 kg in 17 months, and improved Israeli carp reached to 2.2 kg. The KC (Korea×China, KC) group was 2.52 and broodstock group was 3.15. F1 showed lower scale score (0.63) than broodstock. The improved carp (F1; CK, KC) had 20% better scales than the parent group (F0), which improved 27% in weight and 25% in scales compared to common Israeli carp. The Israeli carp developed by the genetics-based breeding grew quicker and had improved genetic diversity and fewer scales, which will be of great value for Korean Israeli aquaculture industry due to good marketability.

• 건강소식
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• v.17 no.2 s.171
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• pp.28-30
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• 1993

머리를 감은지 얼마 지나지 않아 하얀 비늘같은 것이 떨어지거나, 간혹 이 부위의 머리가 듬성듬성 빠지는 경우가 있는데, 이것이 지루성 피부염이다.

• Korean Journal of Environment and Ecology
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• v.14 no.3
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• pp.167-174
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• 2000

거제도 남동 해안지역의 한려해상국립공원 보호구역에서 해상자원의 보존을 위한 기초자료를 확보하고자 거제도 일운면 예구리, 남부면 다대리 및 남부면 저구리 해얀지역에서 1999년 6월부터 2000년 3월까지 어류상 조사를 실시하였다. 조사를 통하여 확인된 어류는 총 16목 47목 69속 85 종 2, 789개체가 채집되었으며, 45종이 출현한 농어목(Perciformes), 10종씩 출현한 가자미목 (Pleuronectiformes) 및 횟대목(Scorpaseniformes)의대부분 저서생활을 하는 어류가 주로 채집되었다. 전체 조사기간 동안 가장 만하은 개체가수가 채집된 어류를 줄비늘치(Coelorhyncus multispinulosus) 458개체(16.4%)로 확인되었고 칠서대(Cynoglossus interruptus) 384개채(13.8%), 노랑촉수(Upeneus bensasi) 285개체(10.2%) 등의 순 이었다. 조사시간 6월에 가장 다양하고 풍부한 어류가 채집되었다.

• Korean Journal of Ichthyology
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• v.17 no.3
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• pp.221-224
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• 2005

Three specimens (23.5~26.9 mm in SL) of Eviota (Gobiidae) were collected from about 13 m depth off Munseom, Jeju Island, Korea. They are identified as Eviota melasma by their having a conspicuous black spot on the occipital region of the head and no spots on the dorsal midline of the body. This represents a first record of the species from Korea and a northernmost occurrence of the species.

• Korean Journal of Ichthyology
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• v.24 no.4
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• pp.297-301
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• 2012

Three specimens of Moolgarda seheli were collected for the first time from the southern coastal waters of Jeju Island in October 2010. This species is characterized by scales with a flexible membranous edge, a distinctive dark dot on the upper axis of the pectoral fin base, 39 lateral line scales, and 24~25 vertebrae. The newly proposed Korean name of the genus Moolgarda is "Cho-seung-kkori-sung-eo-sok" and that of M. seheli is "Cho-seung-kko-ri-sung-eo".