• Title/Summary/Keyword: salmon

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Investigation of transport of PEGylated salmon calcitonin through caco-2 cell monolayers

  • Oh, Seung-Huyn;Youn, Yu-Seok;Lee, Jeong-Eun;Park, Yun-Sang;Lee, Kang-Choon
    • Proceedings of the PSK Conference
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    • 2003.10b
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    • pp.234.3-235
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    • 2003
  • The aim of this study is to evaluate the permeability of PEG-conjugated salmon calcitonin (sCT) across monolayers of Caco-2 cells that represent a model of the intestinal barrier. Caco-2 cells were grown to confluency on a permeable polycarbonate membrane to permit transport through it. Permeability experiments were performed with native-sCT and PEG-conjugated sCT (PEG M.W. 2000) at various concentrations (5uM, 10uM, 25uM, 50uM, 100uM) in the apical to basolateral direction. The barrier properties were assessed by detecting transport of markder molecules ($^3$H-mannitol) and by measuring transepithelial electrical resistance (TEER). (omitted)

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Effects of Diluents and Cryoprotectants on Sperm Cryopreservation of Mason Salmon, Oncorhynchus masou masou (산천어(Oncorhynchus masou masou) 정자의 냉동보존에 미치는 희석액과 동해방지제의 영향)

  • Lim, Han-Kyu;Lee, Cheul-Ho;Min, Byung-Hwa;Lee, Jung-Uie;Lee, Chae-Sung;Seong, Ki-Baik;Lee, Sang-Mok
    • Korean Journal of Fisheries and Aquatic Sciences
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    • v.41 no.4
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    • pp.267-271
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    • 2008
  • We experimentally determined the physico-chemical properties of seminal plasma as well as the sperm cryopreservation techniques of masou salmon, Oncorhynchus masou masou. Seminal plasma contained $18{\pm}1mmol/L$ potassium, $144{\pm}4mmol/L$ sodium, $116{\pm}3mmol/L$ chloride, $83.2{\pm}3.1mg/L$ calcium, $14.8{\pm}0.7mg/L$ magnesium, $45{\pm}9mg/L$ glucose, and $1.0{\pm}0.0g/L$ total protein. The osmolality and pH of seminal plasma were $287{\pm}7\;and\;7.7{\pm}0.1mmol/kg$, respectively, and the spermatocrit was $28{\pm}2$. The rate of embryonic survival at the eyed-stage and the hatching rate were highest in 10% methanol with 300 mM glucose. Compared to DMSO or glycerol, methanol served as a better cryoprotectant of masou salmon sperm.

Morphological study of Oncorhynchus spp.(Pisces : Salmonidae) in Korea- III. Sexual dimorphism of chum salmon, Oncorhynchus keta. (한국산 연어속 어류의 형태학적 연구- III 연어, oncorhynchus keta의 성별 형태 차이)

  • Myoung, Jung-Goo;Hong, Kyung-Pyo;Kim, Yong-Uk
    • Korean Journal of Ichthyology
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    • v.5 no.1
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    • pp.85-95
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    • 1993
  • Sexual dimorphism of the matured chum salmon, Onchorhynchus keta, have been studied based on biometrical measurements and osteological characters. Male chum salmon has an elongated and hooked upper jaw and canine-like teeth on the upper and lower jaw. The ratios of snout length (SnL) and upper jaw length (UJ) to head length of male were larger than those of the female, whereas eye diameter (ED) and postorbital part of head (CK) of the male were smaller than those of the female's. The ratios of body depth, caudal peduncle depth, anal fin length and adipose fin length to the standard length (PBL) of the male were also larger than those of the female. On sexual dimolrphism was detected in number of fin rays, gill rakers and pyloric ceaca, where as number of lateral line scales and caudal vertebrae of the female was larger than those of the male. Glossohyal and vomer bones has no sexual difference. The ratio of width to length of supraethmoid bone of the male was larger than that of the female. The ratio of frontal part to posterior part of parasphenoid bone of the male was smaller than that of the female.

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Zoogeography of Taiwanese Fishes

  • Nakabo, Tetsuji
    • Korean Journal of Ichthyology
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    • v.21 no.4
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    • pp.311-321
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    • 2009
  • Three categories (freshwater, amphidromous, and marine fishes) of Taiwanese fishes are analyzed on the basis of zoogeographic elements, viz. China element, Indo-China element, Indo-West Pacific element, Indo-Pacific element, North-Pacific element, Japan-Oregon element, and circumtropical element. Freshwater fishes, which include the China and Indo-China elements, are distributed on part of the boundary area between the Palaearctic and Oriental regions of Wallace (1876). Diadromous fishes include the North-Pacific, Indo-China and Indo-West Pacific elements. Taiwanese salmon, a landlocked (initially diadromous) species that became established in Taiwan between 0.5 my B.P. and the early Pleistocene, is recognized as a distinct taxon included within the Oncorhynchus masou complex, which comprises here three species and two subspecies, viz. Oncorhynchus masou masou (Sancheoneo, Songeo, Sakura-masu or Yamame), O. masou ishikawae (Satsuki-masu or Amago), O. sp. (Biwa-masu), and O. formosanus (Taiwanese salmon), based on molecular, morphological and biological studies. Marine fishes are discussed under the following headings, brackish-water fishes (fishes of brackish waters and seas adjacent to continental coastlines, North Pacific and Indo-West Pacific elements; fishes of brackish waters and seas primarily around islands, Indo-West Pacific element), reef fishes (fishes of inshore reefs along continental coastlines from 0 to ca.100 m depth, Indo-West Pacific element; fishes of inshore reefs primarily around islands from 0 to ca.100 m depth, Indo-West Pacific element; fishes of offshore reefs along continental shelf edges from ca.150 to 300 m depth, circumtropical and Indo-Pacific elements; fishes of offshore reefs primarily around islands from ca.150 to 300 m depth, Indo-Pacific element), demersal fishes (fishes on continental shelves shallower than ca.150 m depth, Indo-West Pacific and Japan-Oregon elements; fishes on edges and upper continental slopes from ca.150 m to 500 m depth, Indo-West Pacific, Indo-Pacific, and circumtropical elements; fishes on lower continental slopes to abyssal plains from ca.500 m to 6,000 m depth, circumtropical element and rarely Indo-Pacific element), pelagic fishes (epipelagic fishes from 0 to ca.150 m depth, Indo-West Pacific, Indo-Pacific or circumtropical elements; meso- and bathypelagic fishes from ca.150 to 3,000 m depth, circumtropical element). The distribution of Taiwanese marine fishes are influenced by the Kuroshio Current, low-salinity and low-temperature waters from mainland China, and sea-bottom topography.

A study on the transformation of the fisheries relations in accordance with the changes in Japan and Russia Fisheries Agreement (일본과 러시아 간 어업질서의 재편에 따른 양국 어업관계의 변모)

  • Kim, Dae-Young
    • The Journal of Fisheries Business Administration
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    • v.46 no.2
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    • pp.93-110
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    • 2015
  • This research examined the transformations of the fisheries relations between Japan and Russia since the establishment of the Exclusive Economic Zone (EEZ) system. The author reviewed the transformations with investigation on mutual fishing access to EEZ including salmon & trout catches. The Japan-Russia fisheries relations have evolved through multiple developmental stages, which include mutual fishing access to EEZ, the reductions of a fishing quota to balance catches of the nations, provision of financial and technical support, and a payment system of EEZ fishing access fee. The Japanese salmon industry also has done similar practices, continuing to catch salmon and trout in the Russian EEZ. Additionally, Japan and Russia have attempted to develop joint fisheries projects and to assure fishing operation safety around Kuril Islands. The case of Japan-Russia mutual fishing access shows that a country that has authority over crucial fisheries resources tends to establish specific conditions of mutual fishing access so that it maximizes its national interest. Thus, this case gives us implication what could be future directions of Korea-China-Japan multinational fishing access. The principle of same number of fishing vessels and quantities of catches has worked in existing mutual fishing access to EEZ among Korea, China, and Japan. However, it is expected that a nation that is endowed with abundant fisheries resources would limit counterpart's fishing access to its EEZ. Therefore, Korean fisheries administration should prepare for all possible situations like a dramatic cut in fishing quota and the termination of fishing access. International fisheries cooperation and payment of fishing access could be viable options for such a situation.