• Title/Summary/Keyword: 해양생명자원

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Evaluation of the Antioxidant Efficacy of Padina boryana Extract from Maldivian Seaweed from Laccadive Sea Area (라카디브 해역 몰디브 자생 해조류 Padina boryana 추출물의 항산화 효능 평가)

  • Kim, Hyun-Soo;Wang, Lei;Jayawardena, Thilina U.;Lee, Jeong Min;Yim, Mi-Jin;Ko, Seok-Chun;Lee, Hyo-Geun;Je, Jun-Geon;Jeon, You-Jin;Lee, Dae-Sung
    • Korean Journal of Fisheries and Aquatic Sciences
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    • v.54 no.2
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    • pp.162-169
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    • 2021
  • Global warming has affected the distribution of organisms for decades and has displayed rapid ascent recently. Research into the effects on tropical organisms are vital. Padina boryana is a resourceful marine microalgae in the Maldives Sea in the Laccadive region. A 70% ethanol extraction (PBE) of this seaweed was used to investigate its antioxidant potential. Both in vitro and in vivo models were implemented. PBE exhibited protective potential against H2O2 induced apoptosis. ROS levels were suppressed due to PBE. PBE expressed a cytoprotective nature. In vivo experiments involving the zebra fish model conformed its validity. The antioxidant efficacy of PBE was dose dependent. Study outcomes suggest PBE has potential as a novel and valuable marine resource to aid the functional food and cosmeceutical industries.

A Study on the Bioactivity Exploration of the Collected Marine Microorganisms and Microalgaes in Korea (우리나라에서 확보한 해양미생물과 미세조류에 대한 기초생리활성 연구)

  • Seung Sub Bae;Yong Min Kwon;Dawoon Chung;Woon-Jong Yu;Kichul Cho;Eun-Seo Cho;Yoon-Hee Jung;Yun Gyeong Park;Hyemi Ahn;Dae-Sung Lee;Jin-Soo Park;Jaewook Lee;Dong-Chan Oh;Ki-Bong Oh;EunJi Cho;Sang-Ik Park;You-Jin Jeon;Hyo-Geun Lee;Keun-Yong Kim;Sang-Jip Nam;Hyukjae Choi;Cheol Ho Pan;Grace Choi
    • Journal of Marine Life Science
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    • v.8 no.2
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    • pp.136-149
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    • 2023
  • Basic bioactivities (antioxidant, anti-inflammatory, antibacterial, anticancer, antiviral) were investigated from 370 strains of marine bacteria, fungi, and microalgae obtained from various marine environmental regions in Korea, and the activity results were obtained at the collection site, isolation source, and species level was compared. In the case of marine bacteria, strains belonging to the generally useful genera Streptomyces and Bacillus were observed to have particularly strong efficacy and useful resources were mainly isolated from marine sediments. In the case of marine fungi and microalgae, results showing strong species-specific activity were confirmed, and results showing efficacy-specific activity were also obtained. Based on these results, it is a research result that can facilitate priority access as a strategic material for industrial revitalization and the establishment of a strategy to secure resources based on usefulness when conducting research on chemicals that are selectively effective against specific diseases or when conducting resource-based research. In addition, we believe that by using these results as material for sale through the Marine BioBank (MBB), academia and industry can use them to help accelerate the revitalization of the marine bio industry.

Feeding Habits of the Glowbelly Acropoma japonicum in the South Sea of Korea (한국 남해에 출현하는 반딧불게르치(Acropoma japonicum)의 식성)

  • Jo, Jun Hyoung;Kim, Do-Gyun;Kang, Da Yeon;Kang, Su Kyung;Jeong, Jae Mook;Baeck, Gun Wook
    • Korean Journal of Fisheries and Aquatic Sciences
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    • v.55 no.3
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    • pp.374-378
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    • 2022
  • The feeding habits of the Glowbelly Acropoma japonicum were examined based on 849 specimens collected from the coastal waters of the South Sea of Korea. The total length (TL) of these specimens ranged from 2.6 to 13.0 cm. A. japonicum fed majorly on Euphausia pacifica (Euphausiacea, % index of relative importance; IRI, 51.9). However with growth, its diet shifted from copepoda to euphausiacea. Overall, as the body size of A. japonicum increased, the mean weight of prey within the stomach (mW/ST) increased.

Comparison of Stomach Contents of Yellow Goosefish Lophius litulon, in the South Sea and Yellow Sea, Korea (한국 남해와 서해에서 출현하는 황아귀(Lophius litulon)의 위내용물 조성 비교)

  • Kim, Do-Gyun;Jeong, Jae Mook;Lee, Seung-Jong;Kang, Sukyung;Seong, Gi Chang;Kang, Da Yeon;Jin, Suyeon;Baeck, Gun Wook
    • Korean Journal of Fisheries and Aquatic Sciences
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    • v.55 no.5
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    • pp.714-720
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    • 2022
  • A dietary comparison of yellow goosefish Lophius litulon in the South Sea and Yellow Sea was performed by analyzing stomach contents. Using a bottom trawl net from fisheries resources survey vessels of the National Institute of Fisheries Science, 326 individuals were collected from the South Sea and 166 individuals were collected from the Yellow Sea. The total length range of L. litulon was 5.3-68.4 cm for individuals collected from the South Sea and 7.5-55.1 cm for individuals collected from the Yellow Sea. Based on the index of relative importance and the variation in stomach contents by fish size, L. litulon was found to be a piscevore and a spatiotemporally opportunistic feeder fish that fed mainly on pisces. There were differences in the composition of the stomach contents by season, location, and the interaction between the season and the location. Thus, the diet of L. litulon is affected by the prey abundance and prey spectrum of the habitat.

External Attachment of Pop-up Satellite Archival Tag (PSAT) and Water Temperature Affect Oxygen Consumption Rate of the Olive Flounder Paralichthys olivaceus (넙치(Paralichthys olivaceus) 산소 소비율에 미치는 Pop-up Satellite Archival Tag (PSAT) 체외 부착과 수온의 영향)

  • Geun Su Lee;Pil Jun Kang;Hye Mi Park;Sung-Yong Oh
    • Korean Journal of Fisheries and Aquatic Sciences
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    • v.56 no.5
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    • pp.660-666
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    • 2023
  • This study aimed to examine the effect of external pop-up satellite archival tags (PSATs) attachment and water temperature on the oxygen consumption rate (OCR) of the olive flounder (mean body weight 2281.7 g). The OCRs of fish were measured under conditions of three different water temperature conditions (15, 20, and 25℃) and two different tagging methods [non-tagging, control; bio-logger external attachment with a miniature PSAT (dummy mrPAT), BEA] using a closed flow-through respirometer. The OCRs of fish linearly increased with the increase in water temperature in both the control and BEA (P<0.001); however, the OCRs of BEA were approximately 1.8-1.9 times lower than those of the control at each water temperature (P<0.001). The Q10 values of the control and BEA were the highest in the water temperature range of 15 to 20℃, but sensitivity to water temperature changes was higher in BEA than in the control. The metabolic energy loss rate (MEL) of fish increased with increasing water temperature regardless of external tagging, but the MEL of the control was higher than that of BEA (P<0.001). These results demonstrate that OCR, thermal sensitivity, and energy expenditure are all affected in adult olive flounder with external PSAT attachment.

Estimating the Economic Value of Securing the High Seas Marine Biological Resources Using the Contingent Valuation Method (조건부 가치측정법을 이용한 공해상 해양생명자원 확보의 경제적 가치 추정)

  • Se-Jun Jin;Young-Ju Kwon;Eun-Chul Choi
    • Journal of the Korean Society of Marine Environment & Safety
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    • v.29 no.7
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    • pp.794-801
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    • 2023
  • The high seas, covering the majority of the world's oceans, hold invaluable marine resources crucial for the growth of the marine bio-industry. The High seas bioresources program of South Korea is at the forefront of these global efforts. This study aims to gauge public awareness and quantify the project benefits, offering insights for future policy decisions. The results revealed that the estimated annual average willingness to pay (WTP) was 3,778.8 KRW, equating to approximately 81.54 billion KRW when extrapolated to the entire national population. The implications of the study are twofold: The project benefits, based on WTP, are substantial, amounting to approximately 81.5 billion KRW annually. This provides critical reference material for future policy formulation, given the considerable WTP in comparison to the current investment. Although interest in international sea marine biological resources is growing, public awareness remains relatively low. However, the project plays a crucial role in building essential databases for the marine bio-industry and securing international sea marine biological resources. Public interest and sustained support are pivotal, not only for this project but also for future policy implementation. Strategies to enhance public awareness are essential, and the study results offer valuable input for future policy decisions.

Diet Composition of Common Flying Squid Todarodes pacificus in the Coastal Waters of East Sea, Korea (한국 동해에 출현하는 살오징어(Todarodes pacificus)의 위내용물 조성)

  • Park, Hyun-Sol;Jin, Suyeon;Kim, So Ra;Kim, Jung Jin;Baeck, Gun Wook
    • Korean Journal of Fisheries and Aquatic Sciences
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    • v.54 no.6
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    • pp.1052-1057
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    • 2021
  • The diet composition of common flying squid Todarodes pacificus was studied using 1,084 specimens collected through trawl and jigging from June 2018 to June 2020 in the East Sea of Korea. The mantle length (ML) of the collected individuals ranged from 13.6 to 31.1 cm. Todarodes pacificus is a carnivore. In the study area, T. pacificus was observed feeding mainly on fish and cephalopods, in addition to small quantities of crustaceans. The calculated trophic level value for T. pacificus was 4.10. Small individuals (ML, <18.0 cm) mainly fed on cephalopods, while intermediate (ML, 18.0-23.0 cm) and large (ML, ≥23.0 cm) individuals fed mainly on fish and occasionally on cephalopods. Overall, as the body size of T. pacificus increased, the mean weight of the consumed prey increased (one-way ANOVA, P<0.05).

Feeding Habits of Whitespotted Conger, Conger myriaster in the West Sea of Korea (한국 서해에 출현하는 붕장어(Conger myriaster)의 식성)

  • Da Yeon Kang;Do-Gyun Kim;Gi Chang Seong;Suyeon Jin;Jae Mook Jeong;Su Kyung Kang;Gun Wook Baeck
    • Korean Journal of Ichthyology
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    • v.35 no.3
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    • pp.177-182
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    • 2023
  • Total 158 Conger myriaster were examined and the range of Preanal length (PaL) was 8.2~40.1 cm and average Preanal length was 17.3 cm. Proportion of the empty stomach was 30.4% and individuals, which the prey items were found in stomach, were 110. The most important prey component in the diets of C. myriaster was Pisces that constituted 54.4% in %IRI (Index of relative importance). Engraulis japonicus was the most important prey component in Pisces. Macrura was the second largest prey component and Crangon hakodatei was the most important prey component in Macrura. The result of analysis in ontogenetic changes significantly exhibited among three size classes (<15.0 cm, 15.0~20.0 cm, ≥20.0 cm). The proportion of Macrura decreased as increasing body size, whereas the consumption of Pisces increased gradually. As body size of C. myriaster increased, the mean weight of prey per stomach (mW/ST) increased (one way-ANOVA, P<0.05).

생명공학육성 제3단계 기본계획-21C 생명공학기술 산업 비전

  • Korea Institute of Science and Technology Information
    • Journal of Scientific & Technological Knowledge Infrastructure
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    • s.10
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    • pp.126-139
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    • 2002
  • 지난 2001년 12월에 과학기술부, 교육인적자원부, 농림부, 산업자원부, 보건복지부, 환경부, 해양수산부가 공동으로 발표한 생물공학육성 기본 계획을 요약하여 소개한다.

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