• Proceedings of the Korean Society of Developmental Biology Conference
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• 1998.07a
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• pp.66-67
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• 1998

난황형성기의 난소를 가진 암컷 어미에게 갑상선 호르몬인 3,5,3'-triiodo-L-thyronine ($T_{3}$)를 20 mg $T_{3}$/kg체중으로 주사하여 출산된 조피볼락 자어를 대조구 자어와 함께 30일간 사육하면서 성장과 생존율을 비교하였고, 실험종료시인 전어체를 갈아 체성분 조성을 파악하였다. 출산자어의 성장은 대조구에 비해 $T_{3}$구에서 유의하게 빨랐으며, 생존율 역시 $T_{3}$구가 대조구보다 유의하게 높았다. 실험종료시 치어의 비만도는 대조구가 $T_{3}$구에 비해 높게 나타났다. 실험종료시 $T_{3}$구의 어체내 수분과 회분함량은 대조구의 결과와 유의한 차이를 보이지 않았으나, 단백질 함량은 $T_{3}$구에서 대조구 보다 높았으며, 지질은 $T_{3}$에서 오히려 낮았다. 이상의 결과로 조피볼락에 대한 $T_{3}$의 모체주사는 출산자어의 성장과 생존율 향상에 도움을 주는 것으로 평가되었다.

• Journal of Life Science
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• v.18 no.6
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• pp.782-788
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• 2008

The aim of this work is to show differences in the pattern of glycoconjugate composition in the intestines of four teleostean species (Sebastes schlegeli, Halichoeres poecilopterus, Bryzoichthys lysimus, and Takifugu pardalis). We compared four regions of all species studied. The specimens were processed and stained with nine kinds of biotinylated lectins (DBA, SBA, PNA, BSL- I , RCA- I , sWGA, UEA- I , LCA and Con A). Except for Sebastes schlegeli, no differences between regions were observed. The intestinal epithelium of Halichoeres poecilopterus possessed D-glucose/mannose residues in all regions. ${\beta}$-N-acetyl-D-galactosamine was distinctive along the intestines, although the pattern of diversity was different in Sebastes schlegeli, Bryzoichthys lysimus, and Takifugu pardalis. Additionally, the occurrence of Galactose-${\beta}$-1,3-N-acetyl-D-galactosamine and ${\alpha}$-D-galactose were confirmed in the proximal, middle, and distal intestine of Sebastes schlegeli, while rectal intestine lacked these sugar residues. Along with ${\beta}$-N-acetyl-D-galactosamine, ${\beta}$-N-acetyl-D-glucosamine and D-glucose/mannose were also determined in Bryzoichthys lysimus. Galactose-${\beta}$-1,3-N-acetyl-D-galactosamine, D-galactose, and D-glucose/mannose were also present in Takifugu pardalis.

• Journal of Aquaculture
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• v.11 no.4
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• pp.437-447
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• 1998

In mass production of larval rockfish, Sebastes schlegeli, high mortality had been observed frequently. This may be the consequence of the low nutritional quality of the live feeds used. This experiment was designed to find out a suitable diet for the mass production of rockfish larvae. Three kinds of live feeds were tested ; plutei of sea urchin (Hemicentrotus pulcherrimus), L-type rotifers (Brachionus plicatiilis) and Artemia naupii. The latter two were enriched with ${\omega}$-yeast, Spirulina platensis and Super Selco before feeding to rockfish larvae. The sea urchin plutei caused to poor survival and growth rates for larval rockfish, and therefore, they were not seemed as proper feed for rockfish larvae. Enrichments of rotifers and Artemia nauplii with ${\omega}$-yeast, Spirulina platensis, or Super Selco improved survival and growth rate. But, rotifers enriched with Super Selco resulted in better rockfish larvae survival than those enriched with ${\omega}$-yeast. A sudden increase of mortality occurred around 11 days after birth. In this critical period, a shift feed such as Artemia nauplii had been supplemented with rotifers. After this critical transition period, the moratality gradually decreased by feeding Artemia nauplii enriched with PUFA. Feeding of mixed feed with rotifers and Artemia nauplii resulted in better larval survival and growth than those of each live food alone.

• Journal of Fisheries and Marine Sciences Education
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• v.28 no.3
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• pp.692-700
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• 2016

This study was aimed at investigating the residual patterns of thiamphenicol (TP) in the cultured olive flounder (Paralichthys olivaceus) and black rockfish (Sebastes schlegeli) following oral administration. TP concentration were detected by high performance liquid chromatography with UV detector. The recovery rates of TP in serums ranged 77.05~97.23% (olive flounder) and 89.96~97.11% (black rockfish) for the concentration of 0.1, 1.0, $10{\mu}g/mL$, respectively. After single administration of TP (100 mg/kg body weight) by oral route in olive flounder ($700{\pm}50g$, $23{\pm}1.5^{\circ}C$) and black rockfish ($500{\pm}30g$, $23{\pm}1.5^{\circ}C$), the concentration in the serum was determined at 1, 5, 10, 15, 24, 30, 50, 168, 264 and 432 h post-dose. Two-compartment model was applied to analyze in the pharmacokinetics of TP administered to the fishes. In the serum of olive flounder, TP was detected on 10 and 15 hours after treatment were $10.08{\mu}g/mL$ and $10.06{\mu}g/mL$ as maximum level, respectively. In the serum of black rockfish, TP was detected on 15 hours after treatment were $8.88{\mu}g/mL$ as maximum level. Concentrations of TP to the fishes were not measurable at 432 hours (18 days) after treatment in all samples. Similar residual patterns of TP were revealed between the fishes. These results are helpful for estimating withdrawal time of TP which has been already in use for farmed fish treatment.

• Journal of Aquaculture
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• v.21 no.2
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• pp.107-110
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• 2008

This study was conducted to evaluate extruded pellet for the growth of grower Korean rockfish Sebastes schlegeli. Two replicate groups of 150 fish per each tank(initial mean weight 112 g) were fed one of four experimental extruded pellets for 8 months. Survival was 100% in all groups. Final mean weight, feed efficiency and protein efficiency ratio, feed intake and hepatosomatic index were not significantly different among all groups. Proximate compositions of the whole body and liver were not significantly different among all groups. It can be concluded that the dietary formulation used in four extruded pellets could be applied in the practical extruded pellet for grower Korean rockfish.

• Journal of Aquaculture
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• v.11 no.3
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• pp.345-352
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• 1998

The effect of starvation on the growth and hepatocyte nuclear size of larval rockfish Sebastes schlegeli and spotted sea bass Lateolabrax sp. were studied. The growth of total length and wet weight in both rockfish and spotted sea bass starved were lower than their control counter-parts. The nuclei sizes of parenchymal cells in the liver of rockfish and spotted sea bass were correlated with the nutritional status of their first-feeding larvae. The result suggested that hepatocyte nuclear size in rockfish and spotted sea bass could be used as an alternative indicator for the identification of starving condition and such karyometry might be criteria for evaluating the successful transition from endogenous to exogenous feeding regime.

• Journal of fish pathology
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• v.19 no.2
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• pp.155-164
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• 2006

Tissue distribution and residue depletion of oxytetracycline (OTC) and tetracycline (TC) following dipping administration were evaluated in olive flounder (Paralichthys olivaceus), rockfish (Sebastes schlegeli), and red sea bream (Pagrus major) under field conditions. Fishes were held in floating cages placed in sea water and fed a commercial diet for 15 days to acclimate to a new surrounding. Fishes were dipped in OTC 50 g/ton water for 30min and TC 18 g/ton water for 5 hours. Blood and muscle were sampled from fishes on 0th, 1th, 2th, 3th, and 5th day after administration. After solid-phase extraction, OTC and TC analyses were carried out by HPLC. The recovery rate of OTC in serum and muscle samples was 71-77% and 78-84%, respectively. Also, the recovery rate of TC in serum and muscle samples was 70-79% and 73-78%, respectively. The results of recovery rate were similar to previous studies reported. At the termination of dipping administration of OTC and TC, residue concentration in muscle samples of rockfish was significantly higher than those of olive flounder and red sea bream. At day 5, residue concentrations of all samples were believed to decrease to lower than 0.05 mg/kg, the detection limit. The present study showed that residue concentrations of OTC and TC decreased to below 0.05 mg/kg after treatment 5th day, faster than the established withdrawal period. The tissue reside depletion time of dipping administration of OTC and TC seems to be shorter than those of oral or parenteral administration.

• Proceedings of the Korean Society of Fisheries Technology Conference
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• 2001.05a
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• pp.440-441
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• 2001

다시마, 대황, 감태, 모자반 등의 대형 갈조류로 이루어진 해중림은 일차 생산이 일어나는 가장 주요한 장소 일 뿐 만 아니라, 엽상체를 생활기반으로 하는 부착동물 군집부터 시작해서 전복, 성게, 소라 등 초식동물, 볼락,조피볼락, 쥐노래미 등 해조 군락을 서식지, 산란장, 은둔처(Ohno, 1993; Watanuki and Yamamoto, 1990)로 이용하는 어류에 이르기까지 풍부한 생물상을 가지는 고유의 생물사회를 구성하고 있다. (중략)

• Proceedings of the Korean Aquaculture Society Conference
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• 2006.05a
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• pp.332-333
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• 2006

• Proceedings of the Korean Society of Fisheries Technology Conference
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• 2002.05a
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• pp.246-247
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• 2002