• Title, Summary, Keyword: Mugil cephalus

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Synopsis of Family Mugilidae (Perciformes) from Korea (한국산 숭어과 어류의 분류)

  • LEE Chung-Lyul;JOO Dong-Soo
    • Korean Journal of Fisheries and Aquatic Sciences
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    • v.27 no.6
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    • pp.814-824
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    • 1994
  • The taxonomic revision of the family Mugilidae from Korea was made based on the fish specimens collected from the coasts of the Korea from July 1990 to July 1994. The family Mugilidae was classified into three species belonging to two genera: Mugil cephalus, Liza haematocheilus and Liza carinatus. Previousely Mugil japonicus reported as a species from Korea was confirmed into junior synonym of Mugil cephalus. based on the external and internal morphological characters. A new key to the genera and species of family Mugilidae was proposed and described their distribution in Korea.

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The infection of Myxobolus sp. in wild mullet, Mugil cephalus (자연산 숭어(Mugil cephalus)의 Myxobolus sp. 감염증)

  • Kim, Wi-Sik;Lee, Mu-Geun;Park, Gyeong-Hui;Jeong, Seong-Ju;O, Myeong-Ju
    • Journal of fish pathology
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    • v.16 no.1
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    • pp.31-38
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    • 2003
  • The mortality of wild mullet, Mugil cephalus was detected in Kwang- Yang bay on February, 2002. The mullet were infected with Myxobolus sp., the cysts of Myxobolus sp. were found in the mesentery, liver, gill and pharyngeal pocket. The histological findings suggested a systemic infection by the Myxobolus sp.. The spores were measured 10-12 (10.9)${\mu}m$ in length, 9-10 (9.4) ${\mu}m$ in width, 6.4-7.2 (6.8) ${\mu}m$ in thickness, with polar capsules of 4-5.2 (4.4) ${\mu}m$ in length and 2.5-3.3 (2.9) ${\mu}m$ in width.

Myxobolus episquamalis (Myxosporea: Myxobolidae) on the scales of wild mullet, Mugil cephalus L, in Korea

  • Cho, Jae-Bum;Huh, Min-Do;Kim, Ki-Hong;Kwon, Se-Ryun;Lee, Mu-Kun
    • Journal of fish pathology
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    • v.19 no.1
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    • pp.1-6
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    • 2006
  • Numerous large whitish cysts were found on the scale of wild mullet, Mugil cephalus captured in Jin-Hae bay of southern coastal sea of Korea. The cyst consisted of many trophozoites, mature spores and interstitial tissues of host origin. Spores were 8.25 ㎛ (7.26-9.35) in length, 6.3 ㎛ (5.63-6.78) in width, 4.34 ㎛ (3.96-5.04) in thickness. Polar capsules were 4.45㎛ (3.8-5.4) in length and 2.35 ㎛ (1.62-2.86) in width, and the length of polar filament was about 39.57 ㎛ (26.3-56.33). Based on the spore morphology and the host & tissue specificity, the present specimens were identified as Myxobolus episquamalis Egusa, Maeno & Sorimachi, 1990. Deformation of bony plate of the scales and infiltration of inflammatory cells were observed in the histological sections.

Enantioselective Kinetic Resolution of Racemic Styrene Oxide using Recombinant Marine Fish Epoxide Hydrolase of Mugil cephalus (해양 어류 Mugil cephalus 유래의 에폭사이드 가수분해효소를 이용한 라세믹 styrene oxide의 입체선택적 분할 반응)

  • Choi, Sung Hee;Kim, Hee Sook;Lee, Eun Yeol
    • Applied Chemistry for Engineering
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    • v.19 no.5
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    • pp.491-496
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    • 2008
  • The microsomal epoxide hydrolase gene (referred to as mMCEH) of Mugil cephalus was cloned by PCR, and then inserted to pColdI and pET-21b(+) vector, respectively. The recombinant E. coli possessing the recombinant plasmids exhibited the enantioperference toward (R)-styrene oxide. When enantioselective kinetic resolutions were conducted with 20 mM racemic styrene oxide, enantiopure (S)-styrene oxide was obtained with high enantiopurity more than 99% enantiomeric excess (ee) and 24.50% yield by using the recombinant E. coli harboring pET-21b(+)/mMCEH.

Effects of Mugil cephalus Extract on Wrinkle Improvement (숭어 추출물을 이용한 주름개선 효과)

  • Cho, Suk-Jung;Kim, Yoon-Soo;Nam, Hyung-Gun;Shin, Hyun-Jae;Ryu, Eun-Mi;Na, Myung-Soon;Ahn, Byeong-Kwon;Choi, Du-Bok;Cha, Wol-Suk
    • KSBB Journal
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    • v.26 no.3
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    • pp.255-259
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    • 2011
  • This study was to suggest the method for wrinkle improvement using Mugil cephalus extract. In order to evaluate the cosmetic product made of M. cephalus extract, the experiments were conducted with subjects and skin states for 4 weeks. Effect of cosmetics containing M. cephalus extract on the water holding capacity and evaporation of the women skin were investigated. The water holding capacity was increased after 1 h of application. But after 2 h, it was decreased. In the case of the water evaporation, it was increased with the increase of time. On the clinical trial, it was also found that water, oil, and rough level on the women skin were increased and wrinkles were improved. Side effects were also not detected during the application and treatment of cosmetics. Based on this result, the application of M. cephalus extract had positive effects on the improvement of wrinkles and skin in women. Therefore, it will be used to develop the wrinkle improvement therapy for women.

Amyloodinium sp. Infestation in Mullet (Mugil cephalus) cultured in a pond on land (육상 수조에서 사육 중인 숭어 (Mugil cephalus)의 Amyloodinium sp. 감염)

  • Park, Sung-Woo;Yu, Jin-Ha;Lee, Chun-Hee
    • Journal of fish pathology
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    • v.19 no.1
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    • pp.7-15
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    • 2006
  • Amyloodinium sp. was found on the gills of mullet (Mugil cephalus) cultured on land. No external symptoms in the diseased fish were found except decoloration of the gills. In fresh preparations of the gills the parasites were opaque round or oval shape with a bright nucleus and 43.5 ㎛ (18.2~72.7, n=20) in size. In preparations added a drop of Lugol solution, they were black with the same shapes in fresh preparations and 43.5 ㎛ (n=20) in size. The parasites were stained black and blue in a droplet of Lugol solution and Diff-Quick III solution, respectively and their sizes were a little larger than in wet preparations. After stained with May-Grunwald Giemsa, the parasites appeared granular eosinophlic in the peripheral cytoplasm and granular strong basophilic in the center. In silver impregnated specimens the peripheral granules were negative and the central ones positive. The granules appeared brown in purplish cytoplasm after staining with Lugol solution. The parasites developed by binary division when they were cultivated in filtered seawater at 20℃. Histopathologically severe epithelial hyperplasia and fusion in the gill filaments resulted in clubbing, especially the proximal region of the filament. Epithelial hyperplasia was also found in the basal regions of the gill filaments and some epithelial cells were occasionally detached from the filaments. Some pear-shaped trophonts of the parasites with rhizoid attached on the gill filaments showing hyperplasia of the epithelial cells and mucous cells.

Gold Storage and Cryopreservation of Grey Mullet(Mugil cephalus) Sperm (숭어(Mugil cephalus) 정자의 냉장.냉동보존)

  • 장영진;최윤희;임한규;고강희
    • Journal of Aquaculture
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    • v.12 no.1
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    • pp.57-62
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    • 1999
  • Experiments were performed to study the activity and fertility of grey mullet (Mugil cephalus) sperm after the courses of cold storage and cryopreservation. The head of spermatozoon showing spherical shape was sized $1.26{\pm}0.08 \{mu}textrm{m}$ in diameter and its nucleus contained numerous granular chromatins. Flagellum of tail showed typical 9+2 structure. Preservation of grey mullet sperm was the most effective when it was stored with serum of the same species at $0^{\circ}C$ and sperm activity index was similar in egg-tris, 0.1 M, 0.3 M and 0.5 M glucose. When grey mullet sperm were cryopreserved in MFRS as diluent with 10% dimethyl sulfoxide was effective compared with other diluents. Some of post-thawed spermatozoa showed the enlarged head and ruptured plasma membrane compared with unfrozen spermatozoa.

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Milt Property and Sperm Motility of Grey Mullet (Mugil cephalus) (숭어 (Mugil cephalus)의 정액 성상과 정자 운동성)

  • CHANG Young Jin;CHOI Youn Hee;LIM Han Kyu;KHO Kang Hee
    • Korean Journal of Fisheries and Aquatic Sciences
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    • v.32 no.2
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    • pp.238-241
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    • 1999
  • Experiments were performed to find out the physico-chemical properties of milt and the sperm motilities in various conditions using the grey mullet, Mugil cephalus. The average concentration of sperm in the milt was $1,11 \pm0.36\times10^{10}/ml$. Spermatocrit was 96.7$\pm$2.6. pH and osmolality of seminal fluid were 7.8$\pm$0.1, 370$\pm$6 mOsm/kg, respectively, Total protein concentration of sperm was higher than that of seminal fluid, but total lipid concentration of seminal fluid was higher than that of sperm. The sperm motility was high in the diluent of milt : artificial seawater (1:10, by volume) and in 822 mOsm/kg and 983 mOsm/kg similar to seawater osmolality, but it decreased after 20 minutes. But activity of sperm was highly maintained in 482 mOsm/kg which was a little higher than osmolality of seminal fluid, and was high in pH 7$\~$9.

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Development of Salted Semi-dried Common Gray Mullet Mugil cephalus using Response Surface Methodology (Response Surface Methodology를 이용한 숭어(Mugil cephalus) 반염건품의 개발)

  • Park, Kwon Hyun;Heu, Min Soo;Kim, Jin-Soo
    • Korean Journal of Fisheries and Aquatic Sciences
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    • v.48 no.6
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    • pp.839-848
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    • 2015
  • This study examined the optimal salting drying method and processing conditions (salt concentration, curing time, dry temperature, and drying time) for preparing salted semi-dried common gray mullet (SSD-CGM) Mugil cephalus based on the moisture content, salinity, and overall acceptance using response surface methodology (RSM). The moisture content, salinity, and overall acceptance of SSD-CGM prepared with different salting methods revealed that dry salting was the optimal salting method for preparing high-quality SSD-CGM. The optimal drying method for preparing high-quality SSD-CGM based on the drying velocity and sensory color was hot air-blast drying. The results of the RSM program indicated that the optimal independent variables ($X_1$, salt concentration; $X_2$, curing time; $X_3$, dry temperature; $X_4$, drying time) based on the dependent variables ($Y_1$, moisture content; $Y_2$, salinity; $Y_3$, overall acceptance) for high-quality SSD-CGM were 5.6% for $X_1$, 2.7 h for $X_2$, $47.0^{\circ}C$ for $X_3$, and 8.5 h for $X_4$ for uncoded values. The predicted values of $Y_1$, $Y_2$, and $Y_3$ for SSD-CGM prepared under optimal conditions were 54.4%, 4.2%, and 6.3, respectively, while the experimental values were $55.2{\pm}1.0%$, $4.1{\pm}0.3%$ and $6.7{\pm}0.8$. The actual and predicted values did not differ.