• 제목/요약/키워드: Fish school

검색결과 976건 처리시간 0.026초

빵 이스트를 먹이로 이용한 부유성 코페포다 Apocyclops sp.(Copepod: Cyclopoida)의 배양 (The Culture of free-swiming Copepod Secies Apocyclops sp. (Copepod; Cyclopoida)by baking Yeast)

  • 정민민;김형신;노섬
    • 한국양식학회지
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    • 제12권4호
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    • pp.303-307
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    • 1999
  • Copepod is useful live food organism in the larval rearing. However of fin fish, culcures of copepod species (Specially calanoida and cyclopoida) were very difficult under artificial management conditions. In this study, we report successful culture of a free swimming cyclopodia copepod species (Apocyclops sp.) by easily baker's yeast as food. The maximum culture density of Apocyclops sp. was observed 11,200±2,660 ind/ℓ during the 30 days culture periods in the 1.5ℓ culture tanks. The nauplii were growth up maximum density 6,400±432 ind/ℓ on day 16th. The number of egg carring female was observed maximum density (666.7 ind./ℓ) of two times after 6days and 28 days of initial culture.

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전과정평가 방법에 의한 외끌이 대형기선저인망 어업의 온실 가스 배출량의 정량적 분석 (A Quantitative Analysis of Greenhouse Gas Emissions from the Danish Seine Fishery using Life Cycle Assessment)

  • 이지훈;이춘우;김지은
    • 한국수산과학회지
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    • 제48권2호
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    • pp.200-206
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    • 2015
  • The fishing industry has a negative effect on the environment due to greenhouse gas (GHG) emissions with the high use of fossil fuels, the destruction of underwater ecosystems by bottom trawls, reduction in resources by fishing, and altered ecosystem diversity. GHG emissions from fisheries were discussed at the Canc$\acute{u}$n meeting in Mexico in 1992 and are part of the Kyoto protocol in 2005. However, few studies have investigated the GHG emissions from Korean fisheries. To find a way to reduce GHG emissions from fisheries, quantitative analysis of GHG emissions from the Korean fishery industry is needed. Therefore, this study investigated the GHG emissions from the Korean Danish seine fishery using the life cycle assessment (LCA) method. The system boundary and input parameters for each process level are defined for the LCA analysis. The fuel-use coefficient of the fishery is also calculated. The GHG emissions from the representative fish caught by the Danish seine fishery are considered and the GHG emissions for the edible weight of fishes are calculated, considering consumption in different areas and different slaughtering processes. The results will help to understand the GHG emissions from Korean fisheries.

Application of Seaweed Cultivation to the Bioremediation of Nutrient-Rich Effluent

  • Chung, Ik-Kyo;Kang, Yun-Hee;Charles Yarish;George P. Kraemer;Lee, Jin-Ae
    • ALGAE
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    • 제17권3호
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    • pp.187-194
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    • 2002
  • A seaweed biofilter/production system of being developed to reduce the environmental impact of marine fish farm effluent in coastal ecosystems as a part of an integrated aquaculture system. Several known seaweed taxa and their cultivars have been considered as candidate biofilter organisms based on their species-specific physiological properties such as nutrient uptake kinetics and their economic value. Porphyra is an excellent cadidate and shows efficient nutrient extraction properties. Rates of ammonium uptake were maintained at around 3 ${\mu}moles{\cdot}g{\cdot}dw^{-1}{\cdot}min^{-1}$ at 150 ${\mu}M$ inorganic nitrogen at $10^{\circ}C$. Ulva is another possible biofilter candidate with an uptake rate of 1.9 ${\mu}moles{\cdot}g{\cdot}dw^{-1}{\cdot}min^{-1}$ under same conditions. A simple uptake/growth and harvest model was applied to estimate the efficiency of the biofilter/production system. The model was deterministic and used a compartment model structure based on difference equations. The efficiency of Porpyra filter was estimated over 17% of ${NH_4}^+$ removal from the contimuous supply of 100 ${\mu}mole{\cdot}l^{-1}\;{NH_4}^+\;at\;100l{\cdot}sec^{-1}$ flow rate.

Immunohistolocalization of Carbonic Anhydrase in Kidney and Intestine of Rainbow Trout, Oncorhynchus mykiss

  • Kim, Soo Cheol;Kim, Jung Woo;Choi, Myeong Rak;Choi, Kap Seong;Kho, Kang Hee
    • 한국식품영양학회지
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    • 제29권1호
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    • pp.33-36
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    • 2016
  • Carbonic anhydrase is essential for the cellular transportation of hydrogen and bicarbonate ions and plays a key role in a wide variety of physiological processes. Rainbow trout, Oncorhynchus mykiss is an important freshwater fish in aquaculture industry and is known to be one of the most susceptible species to environmental contamination. In this study, carbonic anhydrase was detected in the kidney and intestine of rainbow trout. Carbonic anhydrase was isolated from cytosolic proteins and identified by using SDS-PAGE, isoelectric focusing, and immunohistochemical methods. A specific protein band with molecular weight of 30 kDa and pI of 7.0 was detected by Western blotting. The immunohistochemical results showed that carbonic anhydrase was located at various cells in the kidney and intestine of rainbow trout.

Development of a Community-Based Approach to Opisthorchiasis Control

  • Duangsong, Rujira;Promthet, Supannee;Thaewnongiew, Kesorn
    • Asian Pacific Journal of Cancer Prevention
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    • 제14권11호
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    • pp.7039-7043
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    • 2013
  • A liver fluke, Opisthorchis viverrrini (OV), is the major cause of the high incidence of cholangiocarcinoma in North-eastern Thailand. The prevalence of OV infection remains high in various parts of the country, especially in wetland rural areas where a large proportion of the community work in agriculture and continue the traditional practice of eating raw or uncooked cyprinoid fish products. The national control program seems to have had little impact in many of these areas, and it has been difficult to make precise assessments of the overall effectiveness of the program. Therefore there is a need for a community-based approach to prevent infection with the parasite, ideally involving as many players as possible. Here we document an attempt to assess the best means to prevention on the basis of a community intervention in three villages in north-east Thailand, with participation of representatives of Health Promotion Hospitals of the Ministry of Public Health with dedicated staff, but also school teachers, independent government sponsored village health volunteers, and housewives responsible for cooking and diet selection. An action plan was followed, allowing detailed discussions of practical proposals, their introduction and then repeated reflection and further proposals at the individual village level.

편식개선을 위한 초등학생 영양교육 교재 개발 및 교육 효과 - 초등학교 2, 3학년 중심으로 - (Development and Educational Effect of Nutrition Education Workbook for Improvement of Child Picky Eaters - Focused on 2nd and 3rd Graders -)

  • 우태정;지윤정;이경혜
    • 대한영양사협회학술지
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    • 제17권2호
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    • pp.130-141
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    • 2011
  • This study was conducted to develop a nutrition education workbook to improve picky eating in children and to evaluate the effect of nutrition education using this developed workbook. The developed workbook focused on 2nd and 3rd grade students and consisted of five units. The contents included: multi-grain, vegetables (2 units), fish, and milk. The activities, including observation, and learning the roles and names of the foods, were developed mainly to increase motivation for eating a balanced diet. This workbook was developed from April to December 2008, and was applied at 15 elementary schools containing 1,674 students from April to September 2009 in Changwon City, Korea. We evaluated changes in knowledge before and after education on nutrition, eating behavior, dietary habits, and educational activities using self-administered questionnaires. The children demonstrated significant improvements in nutritional knowledge (P<0.001), eating behavior (P<0.001), and dietary habits (P<0.001). Most of the children answered that the education program was helpful and exciting. Based on these results, we believe that the developed workbook is suitable for children picky eaters, and hope it will be used in the field of child nutrition education.

부산지역 외국인 유학생의 종교에 따른 한국 식생활 적응도 및 대학급식소 이용행태 조사 (A Study on the Korean Food Adaptation and Utilization of University Foodservice According to the Religion of International Students in Busan)

  • 홍경희;이현숙
    • 한국식생활문화학회지
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    • 제35권3호
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    • pp.265-277
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    • 2020
  • This study was conducted to investigate dietary adaptations and use of university foodservice in Korea according to the religion of international students. The survey was conducted from April to June in 2017 and included 609 subjects studying at a university in Busan. Muslims showed the highest percentage of eating three meals per day (42.4%) but the highest rate of eating unbalanced meals (64.7%) and midnight meals (41.8%). The most frequent problematic eating habit among Buddhists was irregular mealtimes (46.0%). Adaptation frequency to Korean diet was lowest among Muslims and highest among Christians. Securing halal foods was difficult for Muslims in Korea, and demand for halal foods as a school restaurant menu was high. The response rate for experiencing Korean food at university foodservice was highest among Christians (79.7%) and lowest among Muslims (45.3%). The main reason for not using university foodservice for Muslims was "no menu to eat" for religious reasons, and other religious groups cited "lack of menu variety." Preferred types and recipes of meats, fish, and vegetables also showed significant differences according to religion. As a result, efforts should be made to increase adaptation to life abroad in Korea, including changes in university foodservice management, considering the religious characteristics of international students.

판타지 영화의 캐릭터 분장 코디네이션에 나타난 포스트모던 특성 - Tim Burton 감독의 작품을 중심으로 - (Post-modern Characteristics Expressed on Characters' Make-up Coordination of Fantasy Movies - Focused on the works of Tim Burton -)

  • 장미숙
    • 한국의류산업학회지
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    • 제11권2호
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    • pp.219-230
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    • 2009
  • The purpose of this paper is to study characters' make-up coordination that changes the narrative of the fantasy movies to a visual fantasy, especially it focuses on the post-modern features from the works of Tim Burton, a post-modernist. The contents of the study are, firstly, studying post-modernism that influenced the works of Tim Burton, secondly, researching (1988), (1989), (1990), (1992), (2003) and (2005) and their main characters' make-up design. Thirdly, analyzing the otherness and plural-code that are the post-modern characteristics expressed on characters' make-up coordination of fantasy movies. The otherness means the division of the middle and the surroundings and the rise of the outsiders. Fantasy characters that scares off human such as ghosts, aliens, apes, kidults, mutations, man-made men are in the middle. The plural-code takes the symbolic and pluralistic dimension in to the movie, mixes the sign system, and which natural and supernatural system cross over. In the movies, Beetle Juice who was both ghost and devil expresses life and death, Bat man, Cat woman, Penguin man expresses human and animal, and Edward means human and inhuman. Willy Wonka's makeup makes him look younger, but his grown-up-like clothes show doubleness. For that matter, make-up coordination is the mirror of reflection of period and human being's inner life.

Meat Consumption, Related Nutrients, Obesity and Risk of Prostate Cancer: a Case-Control Study in Uruguay

  • Stefani, Eduardo De;Boffetta, Paolo;Ronco, Alvaro L;Deneo-Pellegrini, Hugo
    • Asian Pacific Journal of Cancer Prevention
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    • 제17권4호
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    • pp.1937-1945
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    • 2016
  • Background: In order to determine the role of meat consumption and related nutrients in the etiology of prostate cancer we conducted a case-control study among Uruguayan men in the time period 1998-2007. Results: The study included 464 cases and 472 controls, frequency matched for age and residence. Both series were drawn from the four major public hospitals in Montevideo. Unconditional logistic regression was used to estimate odds ratios (ORs) and 95 % confidence intervals (95 % CI) of prostate cancer by quartiles of meat intake and related nutrients. The highest vs. the lowest quartile of intake of total meat (OR = 5.19, 95 % CI 3.46-7.81), red meat (OR = 4.64, 95 % CI 3.10-6.95), and processed meat (OR = 1.78, 95% CI 1.22-2.59) were associated with increased risk of prostate cancer. Meat nutrients were directly associated with the risk of prostate cancer (OR for cholesterol 5.61, 95 % CI 3.75-8.50). Moreover, both total meat and red meat displayed higher risks among obese patients. Conclusions: This study suggests that total and red meat and meat nutrients may play a role in the etiology of prostate cancer in Uruguay.

Geometry of the Model Purse Seine in Relation to Enclosed Volume during Hauling Operation

  • Kim Yong-Hae
    • Fisheries and Aquatic Sciences
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    • 제3권2호
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    • pp.156-162
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    • 2000
  • Model experiments for a purse seine were carried out in order to measure the geometry of net shape and to estimate an enclosed volume by using 1177 scale model purse seine of 12.62m float line from an offshore mackerel purse seine. A model purse seine was set from a net box of shooting equipments and then pursing and hauling net by hauling equipment. The 3- D geometry shape of the purse seine net during hauling operation was measured by video image processing and tension of purse line by load cell. The 3-D geometry of the model purse seine during hauling operation could be represented with variables such as a ratio of shooting diameter or maximum net depth and a ratio of hauling operation time. Horizontal shapes of float line and lead line were varied from a circle after shooting to an ellipse with pursing and hauling. Projected lateral shape of purse line was observed and formulated as a shape of a water drop. The cross sectional shapes of curved net from two directions were varied such as sine function or polynomial curves. Therefore, enclosed volume of a purse seine in relation to fish school behaviour can be approximated using two main variables from relevant equations.

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