• 한국어류학회지
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• 제25권1호
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• pp.25-32
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• 2013

We studied the age and growth of striped beakperch (Oplegnathus fasciatus) in the Jeju marine ranching area using a total of 423 otoliths from August 2009 to August 2010. The surface reading method, which was etched with 5% HCl, was the best method to read ages of this fish. The monthly mean fork length ranged from 20.9 cm to 27.7 cm in the Jeju marine ranching area during from August 2009 to August 2010. The annual ring was formed in July to September once a year. Fish were principally composed of 3 to 5 years old and the oldest was 12 years old. The von Bertalanffy growth parameters of this species, which were estimated from a non-linear regression, were $L_{\infty}$=48.20 cm, $t_0$=-1.031yr, and K=0.123/yr.

• Fisheries and Aquatic Sciences
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• 제13권2호
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• pp.190-194
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• 2010

In recent years, several southern coastal fish farms in Korea have experienced 2-30% mortality in striped beakperch suffering from bacterial infections during the spring. In this study, we identified a bacterium isolated from diseased striped beakperch as Pseudomonas anguilliseptica via a biochemical test and 16S rDNA sequence analysis. To evaluate the susceptibility of striped beakperch to P. anguilliseptica, $4.39\times10^7$ or $4.39\times10^5$ CFU/fish of bacteria were injected intraperitoneally at $18\pm1^{\circ}C$ into fish weighing 5.5 g. Cumulative mortalities reached 100% and 45% in the $4.39\times10^7$ and $4.39\times10^5$ CFU/fish infected groups, respectively. Experimentally infected fish showed cell-associated inflammation as well as bacteria in the kidneys and spleen. This study is the first report of striped beakperch mortality caused by P. anguilliseptica, which has pathogenicity in striped beakperch.

• 한국어병학회지
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• 제13권2호
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• pp.121-127
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• 2000

1998년 8~10월에 남해안 일원 해상 가두리 양식장에서 사육중인 돌돔, Oplegnathus fasciatus이 60%이상 폐사하였다. 병어의 체색은 검어지거나 퇴색되며 아가미는 빈혈증상이 심하고 비장은 특이적으로 비대되어 있었고, 비장, 신장, 심장 및 간장 조직에서 퓰겐양성과 호염기성의 비대세포가 관찰되었다. 병어의 비장조직 마쇄액을 GF세포에 접종배양한 결과, 세포가 구형화 되면서 커지는 세포변성효과가 나타나 감염된 GF 세포로부터 바이러스가 분리되었다. 분리된 바이러스 배양액($10^4TCID_{50}$/0.1 ml)을 건강한 돌돔 치어에 복강주사하면 자연감염어와 유사한 증상을 나타내면서 폐사가 일어났고, 또한 병어의 비장조직을 전자현미경으로 관찰한 결과, 조직내 비대세포의 세포질에서 직경이 120~130 nm이며 외막이 있는 정 20면체의 바이러스 입자가 관찰되었다. 그리고 genebank로부터 얻은 참돔 이리도바이러스(RSIV)의 ATPase gene의 DNA염기서열을 주형으로 제작된 primer를 사용하여 PCR을 수행한 결과, 500 bp의 PCR 생성물이 병어나 인위감염된 GF세포에서 얻어졌는데, 이들 PCR 생성물은 RSIV의 ATPase cDNA gene과 95%의 상동성을 나타내었다. 따라서 양식돌돔에 대량 폐사를 일으킨 원인 바이러스는 참돔 이리도바이러스(RSIV)와 유사한 이리도바이러스로 밝혀졌다.

• Animal cells and systems
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• 제11권2호
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• pp.183-189
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• 2007

To investigate the properties of mucosubstances of the epidermis in various teleostean species, conventional histochemical stainings were used on the skin in five species of order Perciformes, i. e., yellowtail, Seriota quinqueradiat, striped beakperch, Oplegnathus fasciatus, brown spotted grouper, Epinephelus chlorostigma, sea chub, Ditrema temmincki and multicolorfin rainbowfish, Halichoeres poecilopterus. The following methods were used: periodic acid Schiff (PAS), alcian blue (AB) pH at 2.5, AB pH at 1.0, AB pH at 2.5-PAS, AB pH at 1.0-PAS, aldehyde fuchsin (AF) pH at 1.7-AB pH at 2.5 and high iron diamine (HID)-AB pH at 2.5. The epidermis of all five species consisted of three layers: superficial, middle, and basal layer. The superficial layer was comprised of rather flattened cells. In particular, the outermost layer of striped beakperch and middle layer of sea chub consisted of mucus-secreting cells. Mucous cells, the unicellular glands, were found in epidermis but varied in number in different body regions and species. Although there was a slight difference in the amount in various species and body regions, the secretory contents of the mucous cells in the five teleostean species contained acidic mucopolysaccharides. In yellowtail, striped beakperch, and multicolorfin rainbowfish, the property of mucosubstances was identified as sialomucin, while it was sulphomucin in brown spotted grouper and sea chub.

• 한국어병학회지
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• 제21권1호
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• pp.13-20
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• 2008

본 연구에서는 RSIV의 수온에 따른 병원성을 규명하기 위한 연구의 일환으로 수온별로 RSIV를 인위적으로 감염시킨 돌돔의 누적폐사를 관찰하고, 다른 온도에서 사육된 돌돔의 온도 스트레스 단백질인 HSP이 관여하는지를 확인하고자, 돌돔의 HSP 유전자의 염기서열 일부를 밝혔다. 각온도별 감염실험에서 17°C와 20°C의 경우 폐사가 발생하지 않았으나, 25°C 및 27°C 수조에서는 각각 90%와 80%의 누적 폐사율을 보였다. 돌돔에서 확인된 HSP 유전자의 일부는 넙치에서 확인된 HSP70와 97%의 homology를 나타내 돌돔의 HSP70으로 판단되었다.

• 한국수산과학회지
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• 제53권2호
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• pp.218-230
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• 2020

The single anatomical attribute that has the greatest influence on acoustic scattering from fish is the presence or absence of a swimbladder. This study examined the effect of removing the gas from the swimbladder on the broadband backscattering characteristics of six species of swimbladdered fish: striped beakperch Oplegnathus fasciatus, black scraper Thamnaconus modestus, dark-banded rockfish Sebastes inermis, goldeye rockfish Sebastes thompsoni, black rockfish Sebastes schlegeli and panther puffer Takifugu pardalis. Before and after removing the gas from the swimbladder, the species-specific, frequency-dependent backscattered echo signals from anaesthetized individuals of each fish species were measured at approximately 1° intervals spanning a 90° aspect angle range from -45° (head down) to +45° (head up) using a broadband echo sounder operating at 100-200 kHz. The relationship between the wavelength-normalized backscattering cross section (σ/λ²) and fish length (L/λ) was calculated for each species. The average σ/λ² value for the six fish species at a L/λ range of 19.79-25.85, with a mean of 22.89, was reduced by approximately 52.3% when the gas was removed.