• 한국해양학회지
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• 제17권2호
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• pp.83-94
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• 1982

1977年부터 1978年 10月 사이 Arcachon灣 水域에서 採集된 資料를 分析하여 年齡을 決定하고 成長을 推定하였다. 耳石 斷面의 構造는 전자 현미경 하에서 觀察 하였고, 解剖 현미경 하에서 觀察된 結果와 비교하였다. 年輪은 冬季 뿐 아니라 夏季에도 목이 相對的으로 좁은 "年輪"이 形成됨이 觀察되었으며, 後者는 夏季에 發生하는 赤潮現象과 關聯되어 진 것으로 思料된다. 成長은 例外的으로 큰 個體를 除外시켰을 때, Von Bertalanffy식을 適用할 수 있었다. 産卵回遊에 의한 한 年齡群 中 큰 個體의 除법은 水에 남은 魚群의 成長律을 減少시키고, 이러한 選擇적인 큰 個體의 回遊가 Von Bertalanffy의 假定을 滿足시키는데 一部 기여하는 것 같다. 例 外的으로 큰 個體의 연 별 體長分布를 "正常的"인 個體들 및 回遊魚群과 比較分析 하여, 이들은 어릴때부터 成長이 빠른 個體들 중 一部로 構成되어 있음을 제시하였 다.一部로 構成되어 있음을 제시하였 다.

• Applied Microscopy
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• 제42권2호
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• pp.53-59
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• 2012

Fenvalerate에 대한 피라미(Zacco platypus)의 독성 수준을 반수 치사량 (LC50)을 이용하여 평가하고, 뇌 손상의 기작과 GFAP의 발현 정도를 광학현미경과 형광현미경을 이용하여 조사하였다. 피라미의 생존율은 fenvalerate의 농도가 높아질수록 낮아졌고 LC50은 $27.79{\mu}g/L$이었다. TUNEL assay결과 fenvalerate의 농도가 높아질수록 뇌 조직에서 세포고사가 증가하였으며, periventricular zone에서 GFAP 발현이 증가하였다. 따라서 세포고사는 fenvalerate에 의한 피라미 뇌 손상의 주요 기작 중 하나로 생각되며, periventricular zone에서 GFAP의 발현증가는 뇌 손상의 지표로 이용될 수 있을 것이다. 이는 pyrethroid계 살충제에 의한 어류의 뇌 손상기작 연구와 수생 생태계 보존을 위한 기초자료로 활용될 수 있을 것으로 사료된다.

• 한국수산과학회지
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• 제6권1_2호
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• pp.49-57
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• 1973

우리나라 동안의 꽁치에 대해서 1968년, 1970년 및 1971년 $1\~7$월의 어획통계 자료와 1968년의 체장측정자료를 이용하여 꽁치의 체형군에 따른 회유를 고찰한 결과는 다음과 같다. 1. 어장내의 전어군의 분포중심의 이동은 북상 회유에서나 남하 회유에서나 대체로 $130^{\circ}\~130^{\circ}30'$의 범위를 중심으로 이루어지고 있으며, 각월의 동서 방향으로의 편배의 정도는 해에 따라 대단히 심하다. 이 중심의 이동은 해황외에 해에 따른 체형군별의 자원량의 크기와도 깊은 관계를 가질 것이라 추측된다. 2. 체형군을 분류하는 기준체장의 주년에 걸친 변화곡선을 구한 결과는 다음과 같다. 5, 6월에 있어서 중형군을 구분하는 체장의 변화곡선은 $Y=24.807X^{0.0885}$이며, 중형군과 소형군을 구분하는 체장의 변화곡선은 $Y=21.532X^{0.1177}$이다. 단 Y는 체장, X는 역상의 월을 표시함. 3. 회유에 있어서 북상기에는 체형이 작은 것이 먼저 북상하고 남하기에는 체형이 큰 것이 먼저 남하하는 경향을 보인다. 4. 회유경로는 어장내의 분포중심의 이동방향으로서 추적될수 있는 것이 아니며, 1968년의 각 체형군의 회유경로는 Fig. 6과 같이 추정된다.

• Animal cells and systems
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• 제16권1호
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• pp.50-56
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• 2012

Kelp grouper ($Epinephelus$ $bruneus$ Bloch 1793) is a commercially important fish in Korea. In recent years, the catch of kelp grouper in the coastal waters of Korea has significantly declined. Despite its importance, little is known about its genetic diversity and conservation efforts are hampered. In this study, we isolated and characterized 12 microsatellite loci using an enrichment method based on magnetic/biotin capture of microsatellite sequences from a size-selected genomic library. All loci were readily amplified and contained TG/CA denucleotide repeats. To characterize each locus, 30 individuals from a natural E. bruneus population in the coastal waters of Jeju Island, Korea, were genotyped. All loci except three, KEm118, KEm154, and KEm219, were polymorphic, with an average of 8.1 alleles per locus (range 2-18). The mean observed and expected heterozygosities were 0.47 (range 0.19-1.00) and 0.61 (range 0.29-0.92), respectively. A significant deviation from Hardy-Weinberg equilibrium was observed at three loci (KEm134, KEm184, and KEm283). These findings will be useful for effective monitoring and management of genetic variation of kelp grouper as well as for the implementation of a fisheries conservation program.

• 수산해양교육연구
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• 제19권2호
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• pp.180-196
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• 2007

This study aims at analyzing the potential of leports-fishing for improving fishing household income. Leports-fishing is a composite concept which is combined with those of leisure, sports and fishing. Korean on-shore resources have also a composite characteristic. The properties of the east, west and south coastal waters are quite different in geography, biology and ecology. There is a array of leports-fishing development potentials of utilizing their characteristics. At present, angling forms a main activity of leports-fishing, but coastal seas would be an emerging space for the public. In order for them to be a ground of fun, enjoyment and festivals, it would be necessary to supply a wide range of activities and facilities including angling, scuba diving, fish barbecue, ecological experience, fishing experience, cruise, and so forth. As seen in the survey results, the participants have strong desire for fun and enjoyment through leports-fishing activities. The proportion of people participating in one or two times a year amounts to 40 percent. Most coastal places visited are close to medium/large cities and two-days leports-fishing/tourism accounts for some 77 percent. However, it turned out that conflicts between leports-fishing participants and fishermen are not serious. The results of expenditure function estimation appear that the elasticity of per capita income is very high with 1.2660 and that there are negative relationships between leports-fishing expenditure and transportation/food/lodging costs. Assuming the annual national economic growth rate of 4 percent, it is anticipated that Korean leports-fishing population will increase to 3.18 million in 2010 and 4.07 million in 2015. Korean leports-fishing market potential in 2015, which is calculated based on per capita expenditure on leports-fishing, appears to amount to 1,400 billion won~1,600 billion won. The contribution of such market potential to the fishing households is expected to be 62.3~74.2 percent(934.5 billion won~111.3 billion won).

• 수산경영론집
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• 제35권2호
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• pp.31-51
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• 2004

The reduction of fishing grounds due to the establishment of EEZ system among China, Japan and Korea together with the depletion of fish resources by pollution of waters and successive reclamation projects along the east and the south coastal lines has made many problems in coastal communities including the decrease of population, the deepening aging phenomenon in the fishery society and the fall of relative income level compared with those of rural and urban residents. Especially, the income level of a fishing household is 90%. of a rural resident and 70% of a urban resident. The income of a fishing household consists of 55% of fishing income, 20% of a agricultural source, 20% of income from non-fishing areas, and 10% of transferred income. Compared with that of a Japanese fishing household which has more diverse income sources such as 62% of income coming from non-fishing areas through being hired in manufacturing firms, etc., that of Korean ones is highly dependent upon fishery and agriculture, so that the diversification of income sources is urgently needed, especially in non-fishing areas. This paper shows that as a model to upgrade fisherman's income level, firstly, it is necessary to enhance the value-added of fishing products through processing and new innovation of distribution process and, secondly, to promote tourism in fishing villages. To ascertain this model, a questionnaire survey to fishermen was carried out and showed that they expressed a strong support for the increase of income by the value-added process through processing and innovative distribution system and the active introduction of tourism in fishing villages. A case study on Gosan cooperative in Jeju was also introduced to identify the rationale of the suggested model and this study proved the validity of the model again. Conclusively speaking, to level up the fisherman's income requires the value- added activities through the introduction of product processing and new distribution system together with the introduction of marine tourism in fishing villages.

• 대한기관식도과학회지
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• 제10권1호
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• pp.46-50
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• 2004

The majority of esophageal Foreign body ingestions occur in the pediatric population. In adults, true foreign object ingestion occurs more commonly among those with psychiatric disorders, mental impairment. The management of esophageal foreign bodies is influenced by the age, clinical condition of ingested material, anatomic location and technical abilities of the endoscopist. Recently the therapeutic endoscopy is becoming wider and more rational in application. We evaluated the role of endoscopy for removal of esophageal foreign bodies during the period of 4 years from January 2000 to December 2003 at the Department of Otolaryngology and Gastroenterology, Seonam University Hospital. The results were as follow, 1) The age ranged from 21 to 74 years old (mean 50.5), most frequent age group was between 61-70 years old and male to female ratio was 1:1.4. 2) Fish bone was the most frequent foreign body in the esophagus ($47.1\%$), food material ($23.5\%$) and meats ($17.6\%$) were next frequent foreign bodies. The most frequent site of lodgement was the first ($78.4\%$), second ($17.6\%$) and third narrowing ($3.9\%$) in order. 3) The most common symptom was foreign body sensation (28.6%). the next common symptoms were chest discomfort($23.8\%$) and dysphagia($19\%$). 4) In duration of lodgement, 49cases ($96.1\%$) were lodged for less than one day. 5) The foreign bodies of esophagus were removed successfully by flexible endoscope with basket, snare, forceps, overtube and endoscopic variceal ligation cap. There were only 3 cases of minimal complications, esophageal mucosal tearing. In conclusion, endoscopic esophageal foreign body removal is useful and safe with minimal or no complications.

• 한국방재학회:학술대회논문집
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• 한국방재학회 2008년도 정기총회 및 학술발표대회
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• pp.795-798
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• 2008

하구는 담수와 해수가 만나 넓은 갯벌과 기수역을 형성하여 각종 생물의 서식지이자 어류의 산란지로 이용되는 생태학적으로 매우 중요한 지역이다. 마산만은 우리나라의 대표적인 폐쇄성 수역으로 진해만의 가장 안쪽에 위치하며 외해로부터 9km 들어와 있으며, 만 입구의 폭이 1 km 미만으로 해류의 이동의 거의 없는 정체성 수역이다. 마산만산은 인근 마산, 창원 지역에 대규모 공단이 위치하며 100만에 이르는 인구로 인해 많은 오염물질이 유입되어 만의 오염을 가중 시키고 있다. 정체성 수역인 마산만의 특성상 유입되는 오염물은 외해로 배출되지 못하고 만 내부에 축적되어 오염을 가중 시키고 있다. 본 연구에서는 마산만 최내측에 위치한 창원천과 남천의 유입시 발생되는 수리적 거동을 2차원 유한요소 모형인 RMA-2모형 이용 모의하고 오염물질의 이송 및 확산을 RMA-4 모형을 이용하여 모의하였다. 또한 마산만 조위관측소의 조위자료를 활용하여 조위의 영향을 반영하였다.

• Nutrition Research and Practice
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• 제15권2호
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• pp.137-159
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• 2021

Long-chain (LC) n-3 polyunsaturated fatty acids (n-3 PUFAs), in particular docosahexaenoic acid (DHA) and eicosapentaenoic acid (EPA), are nutrients involved in many metabolic and physiological processes, and are referred to as n-3 LCPUFA. They have been extensively studied for their effects in human nutrition and health. This paper provides an overview on metabolism, sources, dietary intake, and status of n-3 LCPUFA. A summary of the dietary recommendations for n-3 LCPUFAs for different age groups as well as specific physiological conditions is provided. Evidence for n-3 LCPUFA in cardiovascular diseases, including new studies, is reviewed. Expert recommendations generally support a beneficial effect of n-3 LCPUFA on cardiovascular health and recommend a daily intake of 500 mg as DHA and EPA, or 1-2 servings of fish per week. The role of n-3 LCPUFA on brain health, in particular neurodegenerative disorders and depression, is reviewed. The evidence for beneficial effects of n-3 LCPUFA on neurodegenerative disorders is non-conclusive despite mechanistic support and observational data. Hence, no definite n-3 LCPUFA expert recommendations are made. Data for the beneficial effect of n-3 LCPUFA on depression are generally compelling. Expert recommendations have been established: 200-300 mg/day for depression; up to 1-2 g/day for major depressive disorder. Recent studies support a beneficial role of n-3 LCPUFAs in reducing the risk for premature birth, with a daily intake of 600-800 mg of DHA during pregnancy. Finally, international experts recently reviewed the scientific evidence on DHA and arachidonic acid (ARA) in infant nutrition and concluded that the totality of data support that infant and follow-on formulas should provide both DHA and ARA at levels similar to those in breast milk. In conclusion, the available scientific data support that dietary recommendations for n-3 LCPUFA should be established for the general population and for subjects with specific physiological conditions.

• 한국수산과학회지
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• 제55권6호
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• pp.946-953
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• 2022

Using the management strategy evaluation methods and data on the Korea chub mackerel Scomber japonicus where the state-space logistic production model is used as the operation and the estimation model respectivley, we examined the effects of both Dorn's rule, α and the buffer value for ABC (allowable biological catch), which are used by the Korea fishery managers for decision rules. We set scenarios that have different pairs of buffer and α values, which include those currently used in the management in Korea. Under each sceanario, we projected the fish population biomass until year 2050, during which ABC is determined in each year with the decision rule. We used three kinds of performance measures: (i) whether the biomass in 2050 is overfished; (ii) the average of annual yields over the simulation period; and (iii) the variability of annual yields over the period. We found that the current practice (buffer=0.9, and α = 0.05) resulted in the best performance in terms of avoiding the "overfished" status. However, the current practice failed to reach the maximum average of the annual yields and led to larger uncertainty in the annual yields.