• 한국식품영양학회지
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• 제21권4호
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• pp.518-523
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• 2008

Experiments were conducted to assess the quality properties of steamed fish paste by addition level, along with a fish meat replacement(dried bovine plasma). The moisture, crude protein, crude fat and ash contents evidenced partially significant difference among the controls, DBP1, DBP2 and DBP3 groups(p<0.05). The pH values of the steamed samples were higher than those of the non-steamed samples, and when the content of the dried bovine plasma as meat replacement agent was increased, the pH was increased. The water holding capacity of the steamed fish past samples, along with the replacement levels were significantly higher than in the samples without the meat replacer(p<0.05). The range of cooking loss was $5.19{\sim}5.38%$. Structural weakening of the boiled samples was significantly higher than that observed in the fried sample. Hardness and chewiness were increased slightly by the addition of bovine plasma, but gel strength evidenced a pattern of decreased in DBP1, DBP2 and DBP3 groups. The result of our sensory evaluation on taste, texture, color and overall acceptance evidenced significant differences among the controls, DBP1, DBP2 and DBP3 groups, and the sensory score of color was the highest.

• 수산해양기술연구
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• 제28권2호
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• pp.164-170
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• 1992

In order to understand and explain the spary combustion, it was necessary to understand the disintegration mechanisms of liquid jet. To understand the disintegration mechanisms of liquid jet, the disintegration phenomena and uniform droplet production regions of testing liquid jet was investigated by means of longitudinally vibration capillary nozzle, which was injected the testing liquids. The testing liquids were light oil and light oil and light oil blended with 25wt% fish oil (File fish oil, Sardine fish oil, Alaska pollac oil) The results can be summarized as follows: 1. The uniform droplet phenomena have been changed according to the frequency of capillary tube, the jet velocity and physical properties of testing oils. 2. Within the region of uniform droplet, Reynold number was increased as Weber number increases. 3. The lower limit of wave length in which uniform droplet was produced 0.8d which was lower than Rayleigh wave length 4. The light oil blended with file fish oil which has lower viscosity and surface tension had the widest uniform droplet production region on the frequency and velocity among testing oils. But light oil blended with sardine fish oil were similar with light oil in the uniform production region.

• 한국어병학회지
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• 제27권2호
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• pp.85-89
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• 2014

Water temperature is a key environmental factor controlling the epizootics of viral diseases in fish. High water temperature is associated with the rapid spread of rock bream iridovirus (RBIV) disease and with high mortality of RBIV infected fish. Although protection of fish against iridoviral disease by active immunization has been reported, little information is available concerning whether fish survived from an epizootic of iridoviral disease can naturally acquire resistance against the viral disease. In the present study, we have demonstrated that juvenile rock bream, which survived from a natural epizootic of RBIV, acquired resistance against recurrence or reinfection of RBIV, and this resistance was established during the subsequent low water temperature period. Furthermore, the possible involvement of the adaptive humoral immune response in the resistance of the juvenile rock bream was suggested by in vivo neutralization experiment.

• Journal of Applied Biological Chemistry
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• 제57권2호
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• pp.131-136
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• 2014

An attempt was made to assess metal ionic toxicity levels of different fishes in the polluted rivers viz., Buriganga and Turag. Fish samples collected from two polluted rivers were analyzed for the levels of metals such as Cd, Cr, Cu, Mn, Pb, and Zn in order to elucidate the status of these contaminants in fish meant for human consumption. The detected concentrations of Cr, Cu, Mn, and Zn ions in fish species collected from the polluted rivers were below the toxic levels and did not appear to pose a threat. Among the analyzed metals, Cd and Pb ions were detected above the permissible levels in liver and muscle tissues of stinging catfish (Heteropneustesfossilis), spotted snakehead (Channapunctata) and wallago (Wallagoattu) collected from the polluted rivers causing toxicity for human consumption. Stinging catfish (Heteropneustesfossilis) was the species found to highly bioaccumulate these metals. Fish species bioconcentrated appreciable amounts of Cd and Pb as toxic metals in the liver as compared to the muscle. Levels of these toxic metals varied depending on different tissues in fish species.

• Asian Pacific Journal of Cancer Prevention
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• 제15권18호
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• pp.7879-7884
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• 2014

To investigate the association between intake of freshwater fish and their fatty acids and the risk of breast cancer in Chinese women, we conducted a case-control study with 669 cases and 682 population-based controls in Jiangsu Province of China. A structured questionnaire was used to elicit detailed information. Unconditional logistic regression analysis was performed to calculate odds ratios (ORs) and 95% confidence intervals (CIs). Total freshwater fish intake was linked to decrease in the adjusted OR for breast cancer, but without dose-dependence. Analyses by freshwater fish species showed that consumption of black carp and silver carp was inversely related to breast cancer risk, with adjusted-ORs for the highest intake category of black carp (${\geq}500g/month$) of 0.54 (95%CI=0.33-0.92; $P_{trend}$ <0.002) and for silver carp (${\geq}1000g/month$) of 0.19 (95%CI=0.11-0.33; $P_{trend}$ <0.001). In contrast, consumption of crucian carp was positively related to breast cancer risk, with an adjusted OR for the highest intake category (${\geq}1000g/month$) of 6.09 (95%CI=3.04-12.2; $P_{trend}$ <0.001). Moderate intakes of SFA, PUFA, n3-PUFA and n6-PUFA from freshwater fish may decrease the risk of breast cancer among premenopausal women. The findings of this study suggest that intake of freshwater fish and their fatty acids may modify risk of breast cancer, and that different species of freshwater fish could have a different actions on breast cancer risk. Future epidemiologic studies are needed to know the effects of freshwater fish intake on breast cancer risk and the cause of these effects.

• 한국수산과학회지
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• 제51권1호
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• pp.79-90
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• 2018

Fish ages are critical information in fish stock assessments because they are required for age-structure models such as virtual population analysis and stochastic catch-at-age models, whose outputs include recruitment strengths, a spawning stock size (abundance or biomass), and the projection of a fish population size in future. However, most countries other than the developed countries have not identified ages of fish caught by fisheries or surveys in a consistent manner for a long time (e.g.,>20 years). Instead, data about fish body sizes (e.g., lengths) have been well available because of ease of measurement. To infer age compositions of fish in a target group using fish length data, we intended to improve the length frequency analysis (LFA), which Schnute and Fournier had introduced in 1980. Our study was different in two ways from the Schnute and Fournier's method. First we calculated not only point estimates of age compositions but also the uncertainty in those estimates. Second, we modified LFA based on the von Bertalanffy growth model (vB-based model) to allow both individual-to-individual and cohort-to-cohort variability in estimates of parameters in the vB-based model. For illustration, we used data about lengths of Korean mackerel Scomber japonicas caught by purse-seine fisheries from 2000-2016.

• 수산해양기술연구
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• 제33권3호
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• pp.173-182
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• 1997

선망어법의 어회과정에 있어서 어군행동에 관한 기초적인 연구를 목적으로 제주 근해에서 사용하고 있는 고등어 선망어구인 파워불록용 선망(Powetblock seine)과 앞으로 예상되는 단선조작에서의고등어 선망어구인 트리플레스용 선망(Triplex seine)의 두 가지 모형망을 1/180로 제작 하고 선망에 의해 포위된 어군의 망내행동과 양쪽 선단의 개구부를 통하여 도피하는 어군의 행동을 관찰 분석함과 동시에 망단의 개구부의 면적 및 장력변화 등을 해석하였으며, 그 결과는 다음과 같다. 1. 죔줄죄기 소요시간 20분일 때, 개구부로 도피하는 아군의 평균 유영속도는 Powerblcok seine에서 9.71cm/sec, Triplex seine에서 9.97cm/sec였다. 2.죔줄죄기 소요시간 20분중 좀줄을 50% 정도 감아들었을 때, 선망내의 어군은 Powerblock seine의 경우 I section 10%, II section방향으로 10% 유영하는 행동을 보였다. 3.죔줄죄기 소요시간 20분중 10분 경과했을 때, 전면 망단 개구부의 면적 감소율은 Powerblock seine이 63.5%, Triplex seine이 어군도피에 대한 수평적 서단능력이 높았따. 그리고, 좀줄에 걸리는 최대장력은 Powerblock seine이 약 8.1톤, Triplex seine이 8.3톤으로 나타 났는데, 양자의 차이는 그다지 크지 않았다.

• Molecular & Cellular Toxicology
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• 제4권3호
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• pp.235-245
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• 2008

Exposure to mercury was assessed in 125 Korean (Gwangju and Busan) and 373 Chinese primary school students (Xinguang village, Goumen town) using hair mercury analysis from November 2006 to September 2007. The geometric mean concentration of mercury was higher among Korean children with recording 0.73 ${\mu}g$/g, compared to Chinese children of 0.12 ${\mu}g$/g, which indicated statistically difference (P<0.01). The mean concentration of Korean children living near incineration facilities was higher by recording 0.76 ${\mu}g$/g while the average concentration of their counterpart in Korea reached 0.69 ${\mu}g$/g. In case of Chinese children, those who are living near power plants showed higher level with posting 0.16 ${\mu}g$/g while the others recorded 0.10 ${\mu}g$/g (P<0.01). Intake of fish was found to be related to hair mercury level. In case of Korean children, those with high fish intake recorded 0.79 ${\mu}g$/g in terms of the geometric mean concentration while the others with low fish intake posted 0.61 ${\mu}g$/g. Among Chinese children, those who often eat fish recorded 0.13 ${\mu}g$/g compared to the others with low fish intake of 0.11 ${\mu}g$/g. On the other hand, amalgam dental fillings have limited influence on mean hair mercury level. As for vaccination, within a month of vaccination, the geometric mean concentration of Korean children reached 0.76 ${\mu}g$/g, and in case of 15 days after injection, the level was 1.20 ${\mu}g$/g. In China, the level of children at one month after receiving injection stood at 0.15 ${\mu}g$/g while the level within 15 days was 0.13 ${\mu}g$/g. Multiple regression analysis showed that BMI, passive smoking, and fish consumption are closely related to hair mercury level among the Korean subjects. In China, hair mercury level was affected by age, location, passive smoking, fish consumption, and vaccination. Explanatory power was 21.6% with $R^2$=0.216.

• 환경영향평가
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• 제30권1호
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• pp.1-12
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• 2021

본 연구는 환경DNA 기술을 이용한 국내 담수어류종 탐지방법 도입 및 적용가능성을 확인하기 위해 수행되었다. 환경DNA를 이용한 모니터링 기술은 기존의 현장조사 모니터링 방식에 비하여 교란이 적고 편의성이 높으며 조사에 대한 감도가 높아 급변하는 하천 생태계 모니터링을 위한 효율적인 방법으로 주목받고 있다. 본 연구의 대상지는 경기도 민물고기 생태학습관으로 수족관 내 수조, 생태연못, 양식장에 서식하는 국내 대표적 담수어류종에 대해 7월부터 10월까지 3차례의 물 환경시료를 수집하여 환경DNA 분석을 실시하였다. 국내 담수생태계의 다양한 서식환경을 고려하여 선정된 종에 대해 기 구축된 유전자생물종 DNA 염기서열 특성을 검토하고, 종 검출 여부 확인을 위해 채수된 16개의 환경시료를 Miya et al(2015)에서 제시된 환경DNA 분석 프로토콜에 준하여 분석하였다. 그 결과 대상 어종 총 7목 11과 50종 중 7목 11과 45종(90%)이 검출되었다. 이는 환경DNA 기술과 기 구축된 어류종 DNA DB를 활용하여 다양한 환경조건에서도 단순한 채수 샘플링으로부터 국내 서식하고 있는 주요 민물고기 어종이 검출되었다는 점에서 의의가 있다. 나아가 실험 중 발생된 수족관 내 시료 오염, 불균질한 DNA 채집, 생물종 유전자정보 누락 등의 오차요인들을 분석하여 자연환경에서 적용 시 앞으로의 보완 방향에 대하여 제시하였다.

• Asian-Australasian Journal of Animal Sciences
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• 제27권1호
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• pp.115-122
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• 2014

This study investigated on the effects of adding mechanically deboned chicken meat (MDCM) hydrolysates on the quality properties of imitation fish paste (IFP) during storage. IFP was prepared from Alaska Pollack, spent laying hens surimi and protein hydrolysates which were enzymatically extracted from MDCM. The study was designed as a $3{\times}4$ factorial design with three MDCM hydrolysate content groups (0%, 0.4%, and 0.8%) and four storage times (0, 2, 4, and 6 weeks). Addition of MDCM hydrolysates increased crude fat content but lowered water content (p<0.05). The breaking force of IFP, an indicator of gel formation, increased in treated groups compared to control (p<0.05). Angiotensin I-converting enzyme (ACE) activity was inhibited and free radical scavenging activity increased with increasing MDCM hydrolysate content (p<0.05). In conclusion, the addition of MDCM to IFP improves gel characteristics. Additionally, protein hydrolysates from MDCM serve as a potential source of ACE inhibiting peptides.