• 제목/요약/키워드: Marine science

검색결과 9,353건 처리시간 0.047초

한국 남해에 출현하는 깃비늘치(Benthosema pterotum)의 위내용물 조성 (Diet Composition of Skinnycheek Lanternfish, Benthosema pterotum in the Coastal Waters of South Sea, Korea)

  • 진수연;성기창;김도균;강다연;김현지;백근욱
    • 한국어류학회지
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    • 제35권2호
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    • pp.129-135
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    • 2023
  • 이번 연구에 사용된 깃비늘치는 2021년 2, 5, 8, 11월과 2022년 2, 4, 8, 11월에 우리나라 남해에서 저인망으로 채집하였으며, 채집된 깃비늘치의 전장범위는 16~73 mm였다. 깃비늘치의 가장 중요한 먹이생물은 난바다곤쟁이류와 요각류였으며, 그 외 단각류, 새우류, 곤쟁이류를 섭식하였으나 그 양은 매우 적었다. 깃비늘치의 영양단계는 3.16으로 나타났다. 크기군별 먹이생물 조성변화를 분석한 결과, <40 mm 크기군에서는 요각류를 주로 섭식하였으며, 성장함에 따라 난바다곤쟁이류의 비율이 증가하였고, 가장 큰 크기군인 ≥60 mm에서는 난바다곤쟁이류의 비율이 감소하고 새우류의 비율이 증가하는 결과가 나타났다. 개체당 평균먹이생물의 개체수는 유의한 차이를 보이지 않은 반면, 중량은 크기군이 증가함에 따라 유의하게 증가하는 경향이 관찰되었다.

Future Prospects and Health Benefits of Functional Ingredients from Marine Bio-resources: A review

  • Samarakoon, Kalpa W.;Elvitigala, Don Anushka Sandaruwan;Lakmal, H.H. Chaminda;Kim, Young-Mog;Jeon, You-Jin
    • Fisheries and Aquatic Sciences
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    • 제17권3호
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    • pp.275-290
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    • 2014
  • The marine ecosystem represents a vast and dynamic array of bio-resources attributed with its huge diversity and considered as potential untapped reservoirs for the development of functional foods for future health markets. Basically, marine microorganisms, sponges, algae, invertebrates such as crustaceans and mollusks along with marine fish species can be considered as marine bio-resources, which can be utilized to obtain different health benefits for humans, directly or after processing. Most of the bio-molecular components, such as lipids and proteins from these marine bio-resources, which can be extracted in large scale using the modern and advanced biotechnological approaches, are suitable drug candidates for the pharmaceutical industry as well as functional food ingredients for the food industry. Moreover, the furtherance of high throughput molecular biological techniques has already been incorporated with identification, mining and extraction of molecular components from marine bio-resources. In this review, potential marine bio-resources with respect to their extractable bio-molecules were described in details, while explaining the present and prospective methods of identification and extraction, which are integrated with advanced techniques in modern biotechnology. In addition, this provides an overview of future trends in marine biotechnology.

Matrix Metalloproteinase: Inhibitory Effect of Marine Substances on MMP-2 and MMP-9

  • Nguyen, Van-Tinh;Qian, Zhong-Ji;Jung, Won-Kyo
    • 통합자연과학논문집
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    • 제4권4호
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    • pp.255-265
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    • 2011
  • Marine ecosystems are often characterized by a high biological diversity, and it corresponds to a high chemical diversity. Up to present, more than 20,000 new bioactive substances have been isolated from marine organisms, where considerable numbers of these naturally occurring derivatives are developed as potential candidates for pharmaceutical application. In this process, screening of natural products from marine organisms that could potentially inhibit the expression of metalloproteinases has gained a huge popularity. Cancer is considered as one of the deadliest diseases in the medical field. Matrix metalloproteinase (MMPs) can degrade extracellular matrix (ECM) components and play important roles in a variety of biological and pathological processes. Matrix metalloproteinase inhibitors (MMPIs) have been identified as potential therapeutic candidates for metastasis, arthritis, chronic inflammation and wrinkle formation.

한국 남해에 출현하는 참돔(Pagrus major)의 성숙과 산란 (Maturation and Spawning of the Red Seabream Pagrus major in the South Sea of Korea)

  • 진수연;임양재;최정화;정재묵;남기문;김도균;최유정;백근욱
    • 한국수산과학회지
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    • 제53권1호
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    • pp.43-49
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    • 2020
  • The maturation and spawning of red seabream Pagrus major were investigated using 1,014 samples collected monthly from January to December of 2018, in the South Sea of Korea. Based on monthly changes in maturity stage and gonadosomatic index, the spawning period was estimated to be between April and August, with peak spawning occuring from May to June. Fecundity varied between 228,996 and 4,544,948 eggs. The relationship between fecundity (F) and fork length (FL) in this species can be expressed by the equation F=0.4869FL3.9452 (R2=0.7448). Using a logistic function, the percentage of sexually mature females was estimated to be over 50% for fish with a FL of 35.3 cm.

Molecular characterization and expression of CD96 in red seabream (Pagrus major)

  • Won-Sik Woo;Kwang-Min Choi;Min-Soo Joo;Gyoungsik Kang;Kyung-Ho Kim;Ha-Jeong Son;Min-Young Sohn;Do-Hyung Kim;Chan-Il Park
    • Fisheries and Aquatic Sciences
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    • 제26권2호
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    • pp.97-104
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    • 2023
  • CD96 is a membrane-bound receptor discovered in humans in 1992 that is mainly present in natural killer cells and T cells derived from haematopoietic cells and performs immune functions. Based on the sequence of CD96 obtained from red seabream (Pagrus major), phylogenetic analysis with other species, infections of normal fish, Streptococcus iniae and red sea bream iridovirus (RSIV), and expression analysis was conducted using real-time polymerase chain reaction. Phylogenetic analysis showed the highest homology with Sparus aurata, and multiple sequence analysis confirmed the conservation of major domains between different fish species. Normal fish high expression results were confirmed in the head kidney, and spleen, which are the haematopoietic organs of the fish. High expression levels were confirmed in the gills, liver, spleen, and kidney on day three after RSIV infection. After S. iniae infection, high expression was confirmed in the gills and liver on day one, and high expression was confirmed in the spleen from 12 hours. These results show that PmCD96 functions as an immune gene in P. major and is considered a basic research case for CD96 in fish's hematopoietic organ immune system.